kopia lustrzana https://github.com/micropython/micropython
981 wiersze
25 KiB
C
981 wiersze
25 KiB
C
/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2013 PJRC.COM, LLC.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* 1. The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* 2. If the Software is incorporated into a build system that allows
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* selection among a list of target devices, then similar target
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* devices manufactured by PJRC.COM must be included in the list of
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* target devices and selectable in the same manner.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if F_CPU >= 20000000
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#include "mk20dx128.h"
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//#include "HardwareSerial.h"
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#include "usb_dev.h"
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#include "usb_mem.h"
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// buffer descriptor table
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typedef struct {
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uint32_t desc;
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void * addr;
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} bdt_t;
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__attribute__ ((section(".usbdescriptortable"), used))
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static bdt_t table[(NUM_ENDPOINTS+1)*4];
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static usb_packet_t *rx_first[NUM_ENDPOINTS];
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static usb_packet_t *rx_last[NUM_ENDPOINTS];
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static usb_packet_t *tx_first[NUM_ENDPOINTS];
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static usb_packet_t *tx_last[NUM_ENDPOINTS];
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uint16_t usb_rx_byte_count_data[NUM_ENDPOINTS];
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static uint8_t tx_state[NUM_ENDPOINTS];
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#define TX_STATE_BOTH_FREE_EVEN_FIRST 0
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#define TX_STATE_BOTH_FREE_ODD_FIRST 1
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#define TX_STATE_EVEN_FREE 2
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#define TX_STATE_ODD_FREE 3
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#define TX_STATE_NONE_FREE_EVEN_FIRST 4
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#define TX_STATE_NONE_FREE_ODD_FIRST 5
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#define BDT_OWN 0x80
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#define BDT_DATA1 0x40
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#define BDT_DATA0 0x00
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#define BDT_DTS 0x08
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#define BDT_STALL 0x04
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#define BDT_PID(n) (((n) >> 2) & 15)
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#define BDT_DESC(count, data) (BDT_OWN | BDT_DTS \
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| ((data) ? BDT_DATA1 : BDT_DATA0) \
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| ((count) << 16))
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#define TX 1
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#define RX 0
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#define ODD 1
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#define EVEN 0
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#define DATA0 0
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#define DATA1 1
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#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
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#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
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static union {
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struct {
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union {
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struct {
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uint8_t bmRequestType;
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uint8_t bRequest;
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};
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uint16_t wRequestAndType;
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};
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uint16_t wValue;
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uint16_t wIndex;
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uint16_t wLength;
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};
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struct {
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uint32_t word1;
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uint32_t word2;
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};
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} setup;
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#define GET_STATUS 0
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#define CLEAR_FEATURE 1
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#define SET_FEATURE 3
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#define SET_ADDRESS 5
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#define GET_DESCRIPTOR 6
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#define SET_DESCRIPTOR 7
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#define GET_CONFIGURATION 8
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#define SET_CONFIGURATION 9
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#define GET_INTERFACE 10
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#define SET_INTERFACE 11
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#define SYNCH_FRAME 12
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// SETUP always uses a DATA0 PID for the data field of the SETUP transaction.
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// transactions in the data phase start with DATA1 and toggle (figure 8-12, USB1.1)
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// Status stage uses a DATA1 PID.
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static uint8_t ep0_rx0_buf[EP0_SIZE] __attribute__ ((aligned (4)));
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static uint8_t ep0_rx1_buf[EP0_SIZE] __attribute__ ((aligned (4)));
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static const uint8_t *ep0_tx_ptr = NULL;
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static uint16_t ep0_tx_len;
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static uint8_t ep0_tx_bdt_bank = 0;
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static uint8_t ep0_tx_data_toggle = 0;
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uint8_t usb_rx_memory_needed = 0;
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volatile uint8_t usb_configuration = 0;
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volatile uint8_t usb_reboot_timer = 0;
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static void endpoint0_stall(void)
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{
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USB0_ENDPT0 = USB_ENDPT_EPSTALL | USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
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}
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static void endpoint0_transmit(const void *data, uint32_t len)
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{
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#if 0
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serial_print("tx0:");
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serial_phex32((uint32_t)data);
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serial_print(",");
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serial_phex16(len);
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serial_print(ep0_tx_bdt_bank ? ", odd" : ", even");
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serial_print(ep0_tx_data_toggle ? ", d1\n" : ", d0\n");
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#endif
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table[index(0, TX, ep0_tx_bdt_bank)].addr = (void *)data;
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table[index(0, TX, ep0_tx_bdt_bank)].desc = BDT_DESC(len, ep0_tx_data_toggle);
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ep0_tx_data_toggle ^= 1;
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ep0_tx_bdt_bank ^= 1;
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}
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static uint8_t reply_buffer[8];
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static void usb_setup(void)
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{
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const uint8_t *data = NULL;
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uint32_t datalen = 0;
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const usb_descriptor_list_t *list;
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uint32_t size;
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volatile uint8_t *reg;
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uint8_t epconf;
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const uint8_t *cfg;
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int i;
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switch (setup.wRequestAndType) {
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case 0x0500: // SET_ADDRESS
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break;
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case 0x0900: // SET_CONFIGURATION
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//serial_print("configure\n");
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usb_configuration = setup.wValue;
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reg = &USB0_ENDPT1;
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cfg = usb_endpoint_config_table;
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// clear all BDT entries, free any allocated memory...
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for (i=4; i < (NUM_ENDPOINTS+1)*4; i++) {
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if (table[i].desc & BDT_OWN) {
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usb_free((usb_packet_t *)((uint8_t *)(table[i].addr) - 8));
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}
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}
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// free all queued packets
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for (i=0; i < NUM_ENDPOINTS; i++) {
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usb_packet_t *p, *n;
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p = rx_first[i];
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while (p) {
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n = p->next;
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usb_free(p);
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p = n;
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}
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rx_first[i] = NULL;
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rx_last[i] = NULL;
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p = tx_first[i];
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while (p) {
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n = p->next;
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usb_free(p);
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p = n;
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}
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tx_first[i] = NULL;
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tx_last[i] = NULL;
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usb_rx_byte_count_data[i] = 0;
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switch (tx_state[i]) {
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case TX_STATE_EVEN_FREE:
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case TX_STATE_NONE_FREE_EVEN_FIRST:
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tx_state[i] = TX_STATE_BOTH_FREE_EVEN_FIRST;
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break;
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case TX_STATE_ODD_FREE:
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case TX_STATE_NONE_FREE_ODD_FIRST:
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tx_state[i] = TX_STATE_BOTH_FREE_ODD_FIRST;
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break;
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default:
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break;
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}
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}
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usb_rx_memory_needed = 0;
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for (i=1; i <= NUM_ENDPOINTS; i++) {
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epconf = *cfg++;
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*reg = epconf;
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reg += 4;
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if (epconf & USB_ENDPT_EPRXEN) {
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usb_packet_t *p;
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p = usb_malloc();
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if (p) {
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table[index(i, RX, EVEN)].addr = p->buf;
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table[index(i, RX, EVEN)].desc = BDT_DESC(64, 0);
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} else {
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table[index(i, RX, EVEN)].desc = 0;
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usb_rx_memory_needed++;
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}
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p = usb_malloc();
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if (p) {
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table[index(i, RX, ODD)].addr = p->buf;
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table[index(i, RX, ODD)].desc = BDT_DESC(64, 1);
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} else {
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table[index(i, RX, ODD)].desc = 0;
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usb_rx_memory_needed++;
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}
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}
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table[index(i, TX, EVEN)].desc = 0;
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table[index(i, TX, ODD)].desc = 0;
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}
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break;
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case 0x0880: // GET_CONFIGURATION
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reply_buffer[0] = usb_configuration;
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datalen = 1;
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data = reply_buffer;
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break;
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case 0x0080: // GET_STATUS (device)
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reply_buffer[0] = 0;
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reply_buffer[1] = 0;
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datalen = 2;
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data = reply_buffer;
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break;
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case 0x0082: // GET_STATUS (endpoint)
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if (setup.wIndex > NUM_ENDPOINTS) {
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// TODO: do we need to handle IN vs OUT here?
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endpoint0_stall();
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return;
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}
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reply_buffer[0] = 0;
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reply_buffer[1] = 0;
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if (*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4) & 0x02) reply_buffer[0] = 1;
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data = reply_buffer;
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datalen = 2;
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break;
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case 0x0102: // CLEAR_FEATURE (endpoint)
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i = setup.wIndex & 0x7F;
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if (i > NUM_ENDPOINTS || setup.wValue != 0) {
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// TODO: do we need to handle IN vs OUT here?
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endpoint0_stall();
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return;
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}
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(*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) &= ~0x02;
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// TODO: do we need to clear the data toggle here?
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break;
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case 0x0302: // SET_FEATURE (endpoint)
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i = setup.wIndex & 0x7F;
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if (i > NUM_ENDPOINTS || setup.wValue != 0) {
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// TODO: do we need to handle IN vs OUT here?
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endpoint0_stall();
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return;
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}
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(*(uint8_t *)(&USB0_ENDPT0 + setup.wIndex * 4)) |= 0x02;
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// TODO: do we need to clear the data toggle here?
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break;
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case 0x0680: // GET_DESCRIPTOR
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case 0x0681:
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//serial_print("desc:");
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//serial_phex16(setup.wValue);
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//serial_print("\n");
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for (list = usb_descriptor_list; 1; list++) {
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if (list->addr == NULL) break;
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//if (setup.wValue == list->wValue &&
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//(setup.wIndex == list->wIndex) || ((setup.wValue >> 8) == 3)) {
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if (setup.wValue == list->wValue && setup.wIndex == list->wIndex) {
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data = list->addr;
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if ((setup.wValue >> 8) == 3) {
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// for string descriptors, use the descriptor's
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// length field, allowing runtime configured
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// length.
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datalen = *(list->addr);
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} else {
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datalen = list->length;
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}
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#if 0
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serial_print("Desc found, ");
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serial_phex32((uint32_t)data);
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serial_print(",");
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serial_phex16(datalen);
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serial_print(",");
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serial_phex(data[0]);
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serial_phex(data[1]);
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serial_phex(data[2]);
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serial_phex(data[3]);
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serial_phex(data[4]);
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serial_phex(data[5]);
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serial_print("\n");
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#endif
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goto send;
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}
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}
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//serial_print("desc: not found\n");
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endpoint0_stall();
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return;
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#if defined(CDC_STATUS_INTERFACE)
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case 0x2221: // CDC_SET_CONTROL_LINE_STATE
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usb_cdc_line_rtsdtr = setup.wValue;
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//serial_print("set control line state\n");
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break;
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case 0x2321: // CDC_SEND_BREAK
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break;
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case 0x2021: // CDC_SET_LINE_CODING
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//serial_print("set coding, waiting...\n");
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return;
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#endif
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// TODO: this does not work... why?
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#if defined(SEREMU_INTERFACE) || defined(KEYBOARD_INTERFACE)
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case 0x0921: // HID SET_REPORT
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//serial_print(":)\n");
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return;
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case 0x0A21: // HID SET_IDLE
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break;
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// case 0xC940:
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#endif
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default:
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endpoint0_stall();
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return;
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}
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send:
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//serial_print("setup send ");
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//serial_phex32(data);
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//serial_print(",");
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//serial_phex16(datalen);
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//serial_print("\n");
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if (datalen > setup.wLength) datalen = setup.wLength;
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size = datalen;
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if (size > EP0_SIZE) size = EP0_SIZE;
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endpoint0_transmit(data, size);
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data += size;
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datalen -= size;
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if (datalen == 0 && size < EP0_SIZE) return;
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size = datalen;
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if (size > EP0_SIZE) size = EP0_SIZE;
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endpoint0_transmit(data, size);
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data += size;
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datalen -= size;
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if (datalen == 0 && size < EP0_SIZE) return;
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ep0_tx_ptr = data;
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ep0_tx_len = datalen;
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}
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//A bulk endpoint's toggle sequence is initialized to DATA0 when the endpoint
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//experiences any configuration event (configuration events are explained in
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//Sections 9.1.1.5 and 9.4.5).
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//Configuring a device or changing an alternate setting causes all of the status
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//and configuration values associated with endpoints in the affected interfaces
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//to be set to their default values. This includes setting the data toggle of
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//any endpoint using data toggles to the value DATA0.
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//For endpoints using data toggle, regardless of whether an endpoint has the
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//Halt feature set, a ClearFeature(ENDPOINT_HALT) request always results in the
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//data toggle being reinitialized to DATA0.
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// #define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
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static void usb_control(uint32_t stat)
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{
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bdt_t *b;
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uint32_t pid, size;
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uint8_t *buf;
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const uint8_t *data;
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b = stat2bufferdescriptor(stat);
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pid = BDT_PID(b->desc);
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//count = b->desc >> 16;
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buf = b->addr;
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//serial_print("pid:");
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//serial_phex(pid);
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//serial_print(", count:");
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//serial_phex(count);
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//serial_print("\n");
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switch (pid) {
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case 0x0D: // Setup received from host
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//serial_print("PID=Setup\n");
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//if (count != 8) ; // panic?
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// grab the 8 byte setup info
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setup.word1 = *(uint32_t *)(buf);
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setup.word2 = *(uint32_t *)(buf + 4);
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// give the buffer back
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b->desc = BDT_DESC(EP0_SIZE, DATA1);
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//table[index(0, RX, EVEN)].desc = BDT_DESC(EP0_SIZE, 1);
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//table[index(0, RX, ODD)].desc = BDT_DESC(EP0_SIZE, 1);
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// clear any leftover pending IN transactions
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ep0_tx_ptr = NULL;
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if (ep0_tx_data_toggle) {
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}
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//if (table[index(0, TX, EVEN)].desc & 0x80) {
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//serial_print("leftover tx even\n");
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//}
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//if (table[index(0, TX, ODD)].desc & 0x80) {
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//serial_print("leftover tx odd\n");
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//}
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table[index(0, TX, EVEN)].desc = 0;
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table[index(0, TX, ODD)].desc = 0;
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// first IN after Setup is always DATA1
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ep0_tx_data_toggle = 1;
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#if 0
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serial_print("bmRequestType:");
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serial_phex(setup.bmRequestType);
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serial_print(", bRequest:");
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serial_phex(setup.bRequest);
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serial_print(", wValue:");
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serial_phex16(setup.wValue);
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serial_print(", wIndex:");
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serial_phex16(setup.wIndex);
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serial_print(", len:");
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serial_phex16(setup.wLength);
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serial_print("\n");
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#endif
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// actually "do" the setup request
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usb_setup();
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// unfreeze the USB, now that we're ready
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USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
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break;
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case 0x01: // OUT transaction received from host
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case 0x02:
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//serial_print("PID=OUT\n");
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#ifdef CDC_STATUS_INTERFACE
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if (setup.wRequestAndType == 0x2021 /*CDC_SET_LINE_CODING*/) {
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int i;
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uint8_t *dst = (uint8_t *)usb_cdc_line_coding;
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//serial_print("set line coding ");
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for (i=0; i<7; i++) {
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//serial_phex(*buf);
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*dst++ = *buf++;
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}
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//serial_phex32(usb_cdc_line_coding[0]);
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//serial_print("\n");
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if (usb_cdc_line_coding[0] == 134) usb_reboot_timer = 15;
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endpoint0_transmit(NULL, 0);
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}
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#endif
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#ifdef KEYBOARD_INTERFACE
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if (setup.word1 == 0x02000921 && setup.word2 == ((1<<16)|KEYBOARD_INTERFACE)) {
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keyboard_leds = buf[0];
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endpoint0_transmit(NULL, 0);
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}
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#endif
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#ifdef SEREMU_INTERFACE
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if (setup.word1 == 0x03000921 && setup.word2 == ((4<<16)|SEREMU_INTERFACE)
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&& buf[0] == 0xA9 && buf[1] == 0x45 && buf[2] == 0xC2 && buf[3] == 0x6B) {
|
|
usb_reboot_timer = 5;
|
|
endpoint0_transmit(NULL, 0);
|
|
}
|
|
#endif
|
|
// give the buffer back
|
|
b->desc = BDT_DESC(EP0_SIZE, DATA1);
|
|
break;
|
|
|
|
case 0x09: // IN transaction completed to host
|
|
//serial_print("PID=IN:");
|
|
//serial_phex(stat);
|
|
//serial_print("\n");
|
|
|
|
// send remaining data, if any...
|
|
data = ep0_tx_ptr;
|
|
if (data) {
|
|
size = ep0_tx_len;
|
|
if (size > EP0_SIZE) size = EP0_SIZE;
|
|
endpoint0_transmit(data, size);
|
|
data += size;
|
|
ep0_tx_len -= size;
|
|
ep0_tx_ptr = (ep0_tx_len > 0 || size == EP0_SIZE) ? data : NULL;
|
|
}
|
|
|
|
if (setup.bRequest == 5 && setup.bmRequestType == 0) {
|
|
setup.bRequest = 0;
|
|
//serial_print("set address: ");
|
|
//serial_phex16(setup.wValue);
|
|
//serial_print("\n");
|
|
USB0_ADDR = setup.wValue;
|
|
}
|
|
|
|
break;
|
|
//default:
|
|
//serial_print("PID=unknown:");
|
|
//serial_phex(pid);
|
|
//serial_print("\n");
|
|
}
|
|
USB0_CTL = USB_CTL_USBENSOFEN; // clear TXSUSPENDTOKENBUSY bit
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
usb_packet_t *usb_rx(uint32_t endpoint)
|
|
{
|
|
usb_packet_t *ret;
|
|
endpoint--;
|
|
if (endpoint >= NUM_ENDPOINTS) return NULL;
|
|
__disable_irq();
|
|
ret = rx_first[endpoint];
|
|
if (ret) {
|
|
rx_first[endpoint] = ret->next;
|
|
usb_rx_byte_count_data[endpoint] -= ret->len;
|
|
}
|
|
__enable_irq();
|
|
//serial_print("rx, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32(ret);
|
|
//serial_print("\n");
|
|
return ret;
|
|
}
|
|
|
|
static uint32_t usb_queue_byte_count(const usb_packet_t *p)
|
|
{
|
|
uint32_t count=0;
|
|
|
|
__disable_irq();
|
|
for ( ; p; p = p->next) {
|
|
count += p->len;
|
|
}
|
|
__enable_irq();
|
|
return count;
|
|
}
|
|
|
|
// TODO: make this an inline function...
|
|
/*
|
|
uint32_t usb_rx_byte_count(uint32_t endpoint)
|
|
{
|
|
endpoint--;
|
|
if (endpoint >= NUM_ENDPOINTS) return 0;
|
|
return usb_rx_byte_count_data[endpoint];
|
|
//return usb_queue_byte_count(rx_first[endpoint]);
|
|
}
|
|
*/
|
|
|
|
uint32_t usb_tx_byte_count(uint32_t endpoint)
|
|
{
|
|
endpoint--;
|
|
if (endpoint >= NUM_ENDPOINTS) return 0;
|
|
return usb_queue_byte_count(tx_first[endpoint]);
|
|
}
|
|
|
|
uint32_t usb_tx_packet_count(uint32_t endpoint)
|
|
{
|
|
const usb_packet_t *p;
|
|
uint32_t count=0;
|
|
|
|
endpoint--;
|
|
if (endpoint >= NUM_ENDPOINTS) return 0;
|
|
__disable_irq();
|
|
for (p = tx_first[endpoint]; p; p = p->next) count++;
|
|
__enable_irq();
|
|
return count;
|
|
}
|
|
|
|
|
|
// Called from usb_free, but only when usb_rx_memory_needed > 0, indicating
|
|
// receive endpoints are starving for memory. The intention is to give
|
|
// endpoints needing receive memory priority over the user's code, which is
|
|
// likely calling usb_malloc to obtain memory for transmitting. When the
|
|
// user is creating data very quickly, their consumption could starve reception
|
|
// without this prioritization. The packet buffer (input) is assigned to the
|
|
// first endpoint needing memory.
|
|
//
|
|
void usb_rx_memory(usb_packet_t *packet)
|
|
{
|
|
unsigned int i;
|
|
const uint8_t *cfg;
|
|
|
|
cfg = usb_endpoint_config_table;
|
|
//serial_print("rx_mem:");
|
|
__disable_irq();
|
|
for (i=1; i <= NUM_ENDPOINTS; i++) {
|
|
if (*cfg++ & USB_ENDPT_EPRXEN) {
|
|
if (table[index(i, RX, EVEN)].desc == 0) {
|
|
table[index(i, RX, EVEN)].addr = packet->buf;
|
|
table[index(i, RX, EVEN)].desc = BDT_DESC(64, 0);
|
|
usb_rx_memory_needed--;
|
|
__enable_irq();
|
|
//serial_phex(i);
|
|
//serial_print(",even\n");
|
|
return;
|
|
}
|
|
if (table[index(i, RX, ODD)].desc == 0) {
|
|
table[index(i, RX, ODD)].addr = packet->buf;
|
|
table[index(i, RX, ODD)].desc = BDT_DESC(64, 1);
|
|
usb_rx_memory_needed--;
|
|
__enable_irq();
|
|
//serial_phex(i);
|
|
//serial_print(",odd\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
__enable_irq();
|
|
// we should never reach this point. If we get here, it means
|
|
// usb_rx_memory_needed was set greater than zero, but no memory
|
|
// was actually needed.
|
|
usb_rx_memory_needed = 0;
|
|
usb_free(packet);
|
|
return;
|
|
}
|
|
|
|
//#define index(endpoint, tx, odd) (((endpoint) << 2) | ((tx) << 1) | (odd))
|
|
//#define stat2bufferdescriptor(stat) (table + ((stat) >> 2))
|
|
|
|
void usb_tx(uint32_t endpoint, usb_packet_t *packet)
|
|
{
|
|
bdt_t *b = &table[index(endpoint, TX, EVEN)];
|
|
uint8_t next;
|
|
|
|
endpoint--;
|
|
if (endpoint >= NUM_ENDPOINTS) return;
|
|
__disable_irq();
|
|
//serial_print("txstate=");
|
|
//serial_phex(tx_state[endpoint]);
|
|
//serial_print("\n");
|
|
switch (tx_state[endpoint]) {
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
next = TX_STATE_ODD_FREE;
|
|
break;
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
b++;
|
|
next = TX_STATE_EVEN_FREE;
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
next = TX_STATE_NONE_FREE_ODD_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
b++;
|
|
next = TX_STATE_NONE_FREE_EVEN_FIRST;
|
|
break;
|
|
default:
|
|
if (tx_first[endpoint] == NULL) {
|
|
tx_first[endpoint] = packet;
|
|
} else {
|
|
tx_last[endpoint]->next = packet;
|
|
}
|
|
tx_last[endpoint] = packet;
|
|
__enable_irq();
|
|
return;
|
|
}
|
|
tx_state[endpoint] = next;
|
|
b->addr = packet->buf;
|
|
b->desc = BDT_DESC(packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0);
|
|
__enable_irq();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void _reboot_Teensyduino_(void)
|
|
{
|
|
// TODO: initialize R0 with a code....
|
|
__asm__ volatile("bkpt");
|
|
}
|
|
|
|
|
|
|
|
void usb_isr(void)
|
|
{
|
|
uint8_t status, stat, t;
|
|
|
|
//serial_print("isr");
|
|
//status = USB0_ISTAT;
|
|
//serial_phex(status);
|
|
//serial_print("\n");
|
|
restart:
|
|
status = USB0_ISTAT;
|
|
|
|
if ((status & USB_INTEN_SOFTOKEN /* 04 */ )) {
|
|
if (usb_configuration) {
|
|
t = usb_reboot_timer;
|
|
if (t) {
|
|
usb_reboot_timer = --t;
|
|
if (!t) _reboot_Teensyduino_();
|
|
}
|
|
#ifdef CDC_DATA_INTERFACE
|
|
t = usb_cdc_transmit_flush_timer;
|
|
if (t) {
|
|
usb_cdc_transmit_flush_timer = --t;
|
|
if (t == 0) usb_serial_flush_callback();
|
|
}
|
|
#endif
|
|
#ifdef SEREMU_INTERFACE
|
|
t = usb_seremu_transmit_flush_timer;
|
|
if (t) {
|
|
usb_seremu_transmit_flush_timer = --t;
|
|
if (t == 0) usb_seremu_flush_callback();
|
|
}
|
|
#endif
|
|
#ifdef MIDI_INTERFACE
|
|
usb_midi_flush_output();
|
|
#endif
|
|
#ifdef FLIGHTSIM_INTERFACE
|
|
usb_flightsim_flush_callback();
|
|
#endif
|
|
}
|
|
USB0_ISTAT = USB_INTEN_SOFTOKEN;
|
|
}
|
|
|
|
if ((status & USB_ISTAT_TOKDNE /* 08 */ )) {
|
|
uint8_t endpoint;
|
|
stat = USB0_STAT;
|
|
//serial_print("token: ep=");
|
|
//serial_phex(stat >> 4);
|
|
//serial_print(stat & 0x08 ? ",tx" : ",rx");
|
|
//serial_print(stat & 0x04 ? ",odd\n" : ",even\n");
|
|
endpoint = stat >> 4;
|
|
if (endpoint == 0) {
|
|
usb_control(stat);
|
|
} else {
|
|
bdt_t *b = stat2bufferdescriptor(stat);
|
|
usb_packet_t *packet = (usb_packet_t *)((uint8_t *)(b->addr) - 8);
|
|
#if 0
|
|
serial_print("ep:");
|
|
serial_phex(endpoint);
|
|
serial_print(", pid:");
|
|
serial_phex(BDT_PID(b->desc));
|
|
serial_print(((uint32_t)b & 8) ? ", odd" : ", even");
|
|
serial_print(", count:");
|
|
serial_phex(b->desc >> 16);
|
|
serial_print("\n");
|
|
#endif
|
|
endpoint--; // endpoint is index to zero-based arrays
|
|
|
|
if (stat & 0x08) { // transmit
|
|
usb_free(packet);
|
|
packet = tx_first[endpoint];
|
|
if (packet) {
|
|
//serial_print("tx packet\n");
|
|
tx_first[endpoint] = packet->next;
|
|
b->addr = packet->buf;
|
|
switch (tx_state[endpoint]) {
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
tx_state[endpoint] = TX_STATE_ODD_FREE;
|
|
break;
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
tx_state[endpoint] = TX_STATE_EVEN_FREE;
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
tx_state[endpoint] = TX_STATE_NONE_FREE_ODD_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
tx_state[endpoint] = TX_STATE_NONE_FREE_EVEN_FIRST;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
b->desc = BDT_DESC(packet->len, ((uint32_t)b & 8) ? DATA1 : DATA0);
|
|
} else {
|
|
//serial_print("tx no packet\n");
|
|
switch (tx_state[endpoint]) {
|
|
case TX_STATE_BOTH_FREE_EVEN_FIRST:
|
|
case TX_STATE_BOTH_FREE_ODD_FIRST:
|
|
break;
|
|
case TX_STATE_EVEN_FREE:
|
|
tx_state[endpoint] = TX_STATE_BOTH_FREE_EVEN_FIRST;
|
|
break;
|
|
case TX_STATE_ODD_FREE:
|
|
tx_state[endpoint] = TX_STATE_BOTH_FREE_ODD_FIRST;
|
|
break;
|
|
default:
|
|
tx_state[endpoint] = ((uint32_t)b & 8) ?
|
|
TX_STATE_ODD_FREE : TX_STATE_EVEN_FREE;
|
|
break;
|
|
}
|
|
}
|
|
} else { // receive
|
|
packet->len = b->desc >> 16;
|
|
if (packet->len > 0) {
|
|
packet->index = 0;
|
|
packet->next = NULL;
|
|
if (rx_first[endpoint] == NULL) {
|
|
//serial_print("rx 1st, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32((uint32_t)packet);
|
|
//serial_print("\n");
|
|
rx_first[endpoint] = packet;
|
|
} else {
|
|
//serial_print("rx Nth, epidx=");
|
|
//serial_phex(endpoint);
|
|
//serial_print(", packet=");
|
|
//serial_phex32((uint32_t)packet);
|
|
//serial_print("\n");
|
|
rx_last[endpoint]->next = packet;
|
|
}
|
|
rx_last[endpoint] = packet;
|
|
usb_rx_byte_count_data[endpoint] += packet->len;
|
|
// TODO: implement a per-endpoint maximum # of allocated packets
|
|
// so a flood of incoming data on 1 endpoint doesn't starve
|
|
// the others if the user isn't reading it regularly
|
|
packet = usb_malloc();
|
|
if (packet) {
|
|
b->addr = packet->buf;
|
|
b->desc = BDT_DESC(64, ((uint32_t)b & 8) ? DATA1 : DATA0);
|
|
} else {
|
|
//serial_print("starving ");
|
|
//serial_phex(endpoint + 1);
|
|
//serial_print(((uint32_t)b & 8) ? ",odd\n" : ",even\n");
|
|
b->desc = 0;
|
|
usb_rx_memory_needed++;
|
|
}
|
|
} else {
|
|
b->desc = BDT_DESC(64, ((uint32_t)b & 8) ? DATA1 : DATA0);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
USB0_ISTAT = USB_ISTAT_TOKDNE;
|
|
goto restart;
|
|
}
|
|
|
|
|
|
|
|
if (status & USB_ISTAT_USBRST /* 01 */ ) {
|
|
//serial_print("reset\n");
|
|
|
|
// initialize BDT toggle bits
|
|
USB0_CTL = USB_CTL_ODDRST;
|
|
ep0_tx_bdt_bank = 0;
|
|
|
|
// set up buffers to receive Setup and OUT packets
|
|
table[index(0, RX, EVEN)].desc = BDT_DESC(EP0_SIZE, 0);
|
|
table[index(0, RX, EVEN)].addr = ep0_rx0_buf;
|
|
table[index(0, RX, ODD)].desc = BDT_DESC(EP0_SIZE, 0);
|
|
table[index(0, RX, ODD)].addr = ep0_rx1_buf;
|
|
table[index(0, TX, EVEN)].desc = 0;
|
|
table[index(0, TX, ODD)].desc = 0;
|
|
|
|
// activate endpoint 0
|
|
USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
|
|
|
|
// clear all ending interrupts
|
|
USB0_ERRSTAT = 0xFF;
|
|
USB0_ISTAT = 0xFF;
|
|
|
|
// set the address to zero during enumeration
|
|
USB0_ADDR = 0;
|
|
|
|
// enable other interrupts
|
|
USB0_ERREN = 0xFF;
|
|
USB0_INTEN = USB_INTEN_TOKDNEEN |
|
|
USB_INTEN_SOFTOKEN |
|
|
USB_INTEN_STALLEN |
|
|
USB_INTEN_ERROREN |
|
|
USB_INTEN_USBRSTEN |
|
|
USB_INTEN_SLEEPEN;
|
|
|
|
// is this necessary?
|
|
USB0_CTL = USB_CTL_USBENSOFEN;
|
|
return;
|
|
}
|
|
|
|
|
|
if ((status & USB_ISTAT_STALL /* 80 */ )) {
|
|
//serial_print("stall:\n");
|
|
USB0_ENDPT0 = USB_ENDPT_EPRXEN | USB_ENDPT_EPTXEN | USB_ENDPT_EPHSHK;
|
|
USB0_ISTAT = USB_ISTAT_STALL;
|
|
}
|
|
if ((status & USB_ISTAT_ERROR /* 02 */ )) {
|
|
uint8_t err = USB0_ERRSTAT;
|
|
USB0_ERRSTAT = err;
|
|
//serial_print("err:");
|
|
//serial_phex(err);
|
|
//serial_print("\n");
|
|
USB0_ISTAT = USB_ISTAT_ERROR;
|
|
}
|
|
|
|
if ((status & USB_ISTAT_SLEEP /* 10 */ )) {
|
|
//serial_print("sleep\n");
|
|
USB0_ISTAT = USB_ISTAT_SLEEP;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void usb_init(void)
|
|
{
|
|
int i;
|
|
|
|
//serial_begin(BAUD2DIV(115200));
|
|
//serial_print("usb_init\n");
|
|
|
|
usb_init_serialnumber();
|
|
|
|
for (i=0; i <= NUM_ENDPOINTS*4; i++) {
|
|
table[i].desc = 0;
|
|
table[i].addr = 0;
|
|
}
|
|
|
|
// this basically follows the flowchart in the Kinetis
|
|
// Quick Reference User Guide, Rev. 1, 03/2012, page 141
|
|
|
|
// assume 48 MHz clock already running
|
|
// SIM - enable clock
|
|
SIM_SCGC4 |= SIM_SCGC4_USBOTG;
|
|
|
|
// reset USB module
|
|
USB0_USBTRC0 = USB_USBTRC_USBRESET;
|
|
while ((USB0_USBTRC0 & USB_USBTRC_USBRESET) != 0) ; // wait for reset to end
|
|
|
|
// set desc table base addr
|
|
USB0_BDTPAGE1 = ((uint32_t)table) >> 8;
|
|
USB0_BDTPAGE2 = ((uint32_t)table) >> 16;
|
|
USB0_BDTPAGE3 = ((uint32_t)table) >> 24;
|
|
|
|
// clear all ISR flags
|
|
USB0_ISTAT = 0xFF;
|
|
USB0_ERRSTAT = 0xFF;
|
|
USB0_OTGISTAT = 0xFF;
|
|
|
|
USB0_USBTRC0 |= 0x40; // undocumented bit
|
|
|
|
// enable USB
|
|
USB0_CTL = USB_CTL_USBENSOFEN;
|
|
USB0_USBCTRL = 0;
|
|
|
|
// enable reset interrupt
|
|
USB0_INTEN = USB_INTEN_USBRSTEN;
|
|
|
|
// enable interrupt in NVIC...
|
|
NVIC_SET_PRIORITY(IRQ_USBOTG, 112);
|
|
NVIC_ENABLE_IRQ(IRQ_USBOTG);
|
|
|
|
// enable d+ pullup
|
|
USB0_CONTROL = USB_CONTROL_DPPULLUPNONOTG;
|
|
}
|
|
|
|
|
|
#else // F_CPU < 20 MHz
|
|
|
|
void usb_init(void)
|
|
{
|
|
}
|
|
|
|
#endif // F_CPU >= 20 MHz
|