rp2: Allow enabling USB device without enabling USB-CDC.

Requires changing the USB-CDC stdin/stdout guards from
MICROPY_HW_ENABLE_USBDEV to the new (in this port)
MICROPY_HW_USB_CDC.

ports/rp2/boards/PICO/mpconfigboard.h

@@ -1,6 +1,3 @@
 // Board and hardware specific configuration
 #define MICROPY_HW_BOARD_NAME                   "Raspberry Pi Pico"
 #define MICROPY_HW_FLASH_STORAGE_BYTES          (1408 * 1024)
-
-// Enable USB Mass Storage with FatFS filesystem.
-// #define MICROPY_HW_USB_MSC  (1)

ports/rp2/main.c

@@ -86,7 +86,9 @@ int main(int argc, char **argv) {
     #endif
 
     #if MICROPY_HW_ENABLE_USBDEV
+    #if MICROPY_HW_USB_CDC
     bi_decl(bi_program_feature("USB REPL"))
+    #endif
     tusb_init();
     #endif
 

ports/rp2/mpconfigport.h

@@ -27,20 +27,29 @@
 // Options controlling how MicroPython is built, overriding defaults in py/mpconfig.h
 
 #include <stdint.h>
+#include "hardware/flash.h"
 #include "hardware/spi.h"
 #include "hardware/sync.h"
 #include "pico/binary_info.h"
 #include "pico/multicore.h"
 #include "mpconfigboard.h"
-#if MICROPY_HW_USB_MSC
-#include "hardware/flash.h"
-#endif
 
 // Board and hardware specific configuration
 #define MICROPY_HW_MCU_NAME                     "RP2040"
 #define MICROPY_HW_ENABLE_UART_REPL             (0) // useful if there is no USB
 #define MICROPY_HW_ENABLE_USBDEV                (1)
 
+#if MICROPY_HW_ENABLE_USBDEV
+// Enable USB-CDC serial port
+#ifndef MICROPY_HW_USB_CDC
+#define MICROPY_HW_USB_CDC (1)
+#endif
+// Enable USB Mass Storage with FatFS filesystem.
+#ifndef MICROPY_HW_USB_MSC
+#define MICROPY_HW_USB_MSC (0)
+#endif
+#endif
+
 #ifndef MICROPY_CONFIG_ROM_LEVEL
 #define MICROPY_CONFIG_ROM_LEVEL                (MICROPY_CONFIG_ROM_LEVEL_EXTRA_FEATURES)
 #endif

ports/rp2/mphalport.c

@@ -39,7 +39,7 @@
 #include "lib/cyw43-driver/src/cyw43.h"
 #endif
 
-#if MICROPY_HW_ENABLE_UART_REPL || MICROPY_HW_ENABLE_USBDEV
+#if MICROPY_HW_ENABLE_UART_REPL || MICROPY_HW_USB_CDC
 
 #ifndef MICROPY_HW_STDIN_BUFFER_LEN
 #define MICROPY_HW_STDIN_BUFFER_LEN 512
@@ -50,7 +50,7 @@ ringbuf_t stdin_ringbuf = { stdin_ringbuf_array, sizeof(stdin_ringbuf_array) };
 
 #endif
 
-#if MICROPY_HW_ENABLE_USBDEV
+#if MICROPY_HW_USB_CDC
 
 uint8_t cdc_itf_pending; // keep track of cdc interfaces which need attention to poll
 
@@ -91,10 +91,10 @@ void tud_cdc_rx_cb(uint8_t itf) {
 
 uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
     uintptr_t ret = 0;
-    #if MICROPY_HW_ENABLE_USBDEV
+    #if MICROPY_HW_USB_CDC
     poll_cdc_interfaces();
     #endif
-    #if MICROPY_HW_ENABLE_UART_REPL || MICROPY_HW_ENABLE_USBDEV
+    #if MICROPY_HW_ENABLE_UART_REPL || MICROPY_HW_USB_CDC
     if ((poll_flags & MP_STREAM_POLL_RD) && ringbuf_peek(&stdin_ringbuf) != -1) {
         ret |= MP_STREAM_POLL_RD;
     }
@@ -108,7 +108,7 @@ uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
 // Receive single character
 int mp_hal_stdin_rx_chr(void) {
     for (;;) {
-        #if MICROPY_HW_ENABLE_USBDEV
+        #if MICROPY_HW_USB_CDC
         poll_cdc_interfaces();
         #endif
 
@@ -132,7 +132,7 @@ void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
     mp_uart_write_strn(str, len);
     #endif
 
-    #if MICROPY_HW_ENABLE_USBDEV
+    #if MICROPY_HW_USB_CDC
     if (tud_cdc_connected()) {
         for (size_t i = 0; i < len;) {
             uint32_t n = len - i;

shared/tinyusb/mp_usbd_descriptor.c

@@ -54,8 +54,10 @@ const uint8_t mp_usbd_desc_cfg_static[USBD_STATIC_DESC_LEN] = {
     TUD_CONFIG_DESCRIPTOR(1, USBD_ITF_STATIC_MAX, USBD_STR_0, USBD_STATIC_DESC_LEN,
         0, USBD_MAX_POWER_MA),
 
+    #if CFG_TUD_CDC
     TUD_CDC_DESCRIPTOR(USBD_ITF_CDC, USBD_STR_CDC, USBD_CDC_EP_CMD,
         USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),
+    #endif
     #if CFG_TUD_MSC
     TUD_MSC_DESCRIPTOR(USBD_ITF_MSC, 5, EPNUM_MSC_OUT, EPNUM_MSC_IN, 64),
     #endif
@@ -83,9 +85,11 @@ const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
         case USBD_STR_PRODUCT:
             desc_str = MICROPY_HW_USB_PRODUCT_FS_STRING;
             break;
+        #if CFG_TUD_CDC
         case USBD_STR_CDC:
             desc_str = MICROPY_HW_USB_CDC_INTERFACE_STRING;
             break;
+        #endif
         #if CFG_TUD_MSC
         case USBD_STR_MSC:
             desc_str = MICROPY_HW_USB_MSC_INTERFACE_STRING;

shared/tinyusb/tusb_config.h

@@ -46,28 +46,40 @@
 
 #define CFG_TUSB_RHPORT0_MODE   (OPT_MODE_DEVICE)
 
+#if MICROPY_HW_USB_CDC
 #define CFG_TUD_CDC             (1)
+#else
+#define CFG_TUD_CDC             (0)
+#endif
+
+#if MICROPY_HW_USB_MSC
+#define CFG_TUD_MSC             (1)
+#else
+#define CFG_TUD_MSC             (0)
+#endif
+
+// CDC Configuration
+#if CFG_TUD_CDC
 #define CFG_TUD_CDC_EP_BUFSIZE  (256)
 #define CFG_TUD_CDC_RX_BUFSIZE  (256)
 #define CFG_TUD_CDC_TX_BUFSIZE  (256)
+#endif
 
 // MSC Configuration
 #if CFG_TUD_MSC
 #ifndef MICROPY_HW_USB_MSC_INTERFACE_STRING
 #define MICROPY_HW_USB_MSC_INTERFACE_STRING "Board MSC"
 #endif
-#define CFG_TUD_MSC             (1)
 // Set MSC EP buffer size to FatFS block size to avoid partial read/writes (offset arg).
-#define CFG_TUD_MSC_BUFSIZE     (MICROPY_FATFS_MAX_SS)
+#define CFG_TUD_MSC_BUFSIZE (MICROPY_FATFS_MAX_SS)
 #endif
 
 // Define static descriptor size and interface count based on the above config
 
-#if CFG_TUD_MSC
-#define USBD_STATIC_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN + TUD_MSC_DESC_LEN)
-#else
-#define USBD_STATIC_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
-#endif
+#define USBD_STATIC_DESC_LEN (TUD_CONFIG_DESC_LEN +                     \
+    (CFG_TUD_CDC ? (TUD_CDC_DESC_LEN) : 0) +  \
+    (CFG_TUD_MSC ? (TUD_MSC_DESC_LEN) : 0)    \
+    )
 
 #define USBD_STR_0 (0x00)
 #define USBD_STR_MANUF (0x01)
@@ -80,27 +92,41 @@
 
 #define USBD_DESC_STR_MAX (20)
 
+#if CFG_TUD_CDC
 #define USBD_ITF_CDC (0) // needs 2 interfaces
-
 #define USBD_CDC_EP_CMD (0x81)
 #define USBD_CDC_EP_OUT (0x02)
 #define USBD_CDC_EP_IN (0x82)
+#endif // CFG_TUD_CDC
 
 #if CFG_TUD_MSC
+// Interface & Endpoint numbers for MSC come after CDC, if it is enabled
+#if CFG_TUD_CDC
 #define USBD_ITF_MSC (2)
-#define EPNUM_MSC_OUT    (0x03)
-#define EPNUM_MSC_IN     (0x83)
-#endif
+#define EPNUM_MSC_OUT (0x03)
+#define EPNUM_MSC_IN (0x83)
+#else
+#define USBD_ITF_MSC (0)
+#define EPNUM_MSC_OUT (0x01)
+#define EPNUM_MSC_IN (0x81)
+#endif // CFG_TUD_CDC
+#endif // CFG_TUD_MSC
 
 /* Limits of statically defined USB interfaces, endpoints, strings */
 #if CFG_TUD_MSC
-#define USBD_ITF_STATIC_MAX (3)
+#define USBD_ITF_STATIC_MAX (USBD_ITF_MSC + 1)
 #define USBD_STR_STATIC_MAX (USBD_STR_MSC + 1)
-#define USBD_EP_STATIC_MAX (0x04) // ignoring the IN EP flag 0x80
-#else
-#define USBD_ITF_STATIC_MAX (2)
+#define USBD_EP_STATIC_MAX (EPNUM_MSC_OUT + 1)
+#elif CFG_TUD_CDC
+#define USBD_ITF_STATIC_MAX (USBD_ITF_CDC + 1)
 #define USBD_STR_STATIC_MAX (USBD_STR_CDC + 1)
-#define USBD_EP_STATIC_MAX (0x03) // ignoring the IN EP flag 0x80
+#define USBD_EP_STATIC_MAX (((EPNUM_CDC_EP_IN)&~TUSB_DIR_IN_MASK) + 1)
+#else // !CFG_TUD_MSC && !CFG_TUD_CDC
+#define USBD_ITF_STATIC_MAX (0)
+#define USBD_STR_STATIC_MAX (0)
+#define USBD_EP_STATIC_MAX (0)
 #endif
 
+#endif // MICROPY_HW_ENABLE_USBDEV
+
 #endif // MICROPY_INCLUDED_SHARED_TINYUSB_TUSB_CONFIG_H