kopia lustrzana https://github.com/micropython/micropython
680 wiersze
18 KiB
C
680 wiersze
18 KiB
C
#include <stm32f4xx.h>
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#include <stm32f4xx_rcc.h>
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#include <stm32f4xx_gpio.h>
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#include <stm_misc.h>
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#include "std.h"
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#include "misc.h"
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#include "systick.h"
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#include "led.h"
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#include "lcd.h"
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#include "storage.h"
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static void impl02_c_version() {
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int x = 0;
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while (x < 400) {
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int y = 0;
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while (y < 400) {
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volatile int z = 0;
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while (z < 400) {
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z = z + 1;
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}
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y = y + 1;
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}
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x = x + 1;
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}
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}
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void set_bits(__IO uint32_t *addr, uint32_t shift, uint32_t mask, uint32_t value) {
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uint32_t x = *addr;
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x &= ~(mask << shift);
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x |= (value << shift);
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*addr = x;
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}
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void gpio_init() {
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RCC->AHB1ENR |= RCC_AHB1ENR_CCMDATARAMEN | RCC_AHB1ENR_GPIOCEN | RCC_AHB1ENR_GPIOBEN | RCC_AHB1ENR_GPIOAEN;
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}
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/*
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void gpio_pin_af(GPIO_TypeDef *gpio, uint32_t pin, uint32_t af) {
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// set the AF bits for the given pin
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// pins 0-7 use low word of AFR, pins 8-15 use high word
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set_bits(&gpio->AFR[pin >> 3], 4 * (pin & 0x07), 0xf, af);
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}
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*/
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static void mma_init() {
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// XXX
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RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; // enable I2C1
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//gpio_pin_init(GPIOB, 6 /* B6 is SCL */, 2 /* AF mode */, 1 /* open drain output */, 1 /* 25 MHz */, 0 /* no pull up or pull down */);
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//gpio_pin_init(GPIOB, 7 /* B7 is SDA */, 2 /* AF mode */, 1 /* open drain output */, 1 /* 25 MHz */, 0 /* no pull up or pull down */);
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//gpio_pin_af(GPIOB, 6, 4 /* AF 4 for I2C1 */);
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//gpio_pin_af(GPIOB, 7, 4 /* AF 4 for I2C1 */);
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// get clock speeds
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RCC_ClocksTypeDef rcc_clocks;
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RCC_GetClocksFreq(&rcc_clocks);
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// disable the I2C peripheral before we configure it
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I2C1->CR1 &= ~I2C_CR1_PE;
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// program peripheral input clock
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I2C1->CR2 = 4; // no interrupts; 4 MHz (hopefully!) (could go up to 42MHz)
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// configure clock control reg
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uint32_t freq = rcc_clocks.PCLK1_Frequency / (100000 << 1); // want 100kHz, this is the formula for freq
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I2C1->CCR = freq; // standard mode (speed), freq calculated as above
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// configure rise time reg
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I2C1->TRISE = (rcc_clocks.PCLK1_Frequency / 1000000) + 1; // formula for trise, gives maximum rise time
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// enable the I2C peripheral
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I2C1->CR1 |= I2C_CR1_PE;
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// set START bit in CR1 to generate a start cond!
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}
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static uint32_t i2c_get_sr() {
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// must read SR1 first, then SR2, as the read can clear some flags
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uint32_t sr1 = I2C1->SR1;
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uint32_t sr2 = I2C1->SR2;
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return (sr2 << 16) | sr1;
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}
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static void mma_restart(uint8_t addr, int write) {
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// send start condition
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I2C1->CR1 |= I2C_CR1_START;
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// wait for BUSY, MSL and SB --> Slave has acknowledged start condition
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while ((i2c_get_sr() & 0x00030001) != 0x00030001) {
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}
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if (write) {
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// send address and write bit
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I2C1->DR = (addr << 1) | 0;
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// wait for BUSY, MSL, ADDR, TXE and TRA
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while ((i2c_get_sr() & 0x00070082) != 0x00070082) {
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}
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} else {
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// send address and read bit
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I2C1->DR = (addr << 1) | 1;
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// wait for BUSY, MSL and ADDR flags
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while ((i2c_get_sr() & 0x00030002) != 0x00030002) {
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}
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}
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}
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static void mma_start(uint8_t addr, int write) {
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// wait until I2C is not busy
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while (I2C1->SR2 & I2C_SR2_BUSY) {
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}
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// do rest of start
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mma_restart(addr, write);
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}
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static void mma_send_byte(uint8_t data) {
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// send byte
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I2C1->DR = data;
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// wait for TRA, BUSY, MSL, TXE and BTF (byte transmitted)
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int timeout = 1000000;
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while ((i2c_get_sr() & 0x00070084) != 0x00070084) {
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if (timeout-- <= 0) {
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printf("mma_send_byte timed out!\n");
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break;
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}
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}
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}
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static uint8_t mma_read_ack() {
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// enable ACK of received byte
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I2C1->CR1 |= I2C_CR1_ACK;
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// wait for BUSY, MSL and RXNE (byte received)
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while ((i2c_get_sr() & 0x00030040) != 0x00030040) {
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}
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// read and return data
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uint8_t data = I2C1->DR;
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return data;
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}
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static uint8_t mma_read_nack() {
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// disable ACK of received byte (to indicate end of receiving)
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I2C1->CR1 &= (uint16_t)~((uint16_t)I2C_CR1_ACK);
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// last byte should apparently also generate a stop condition
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I2C1->CR1 |= I2C_CR1_STOP;
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// wait for BUSY, MSL and RXNE (byte received)
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while ((i2c_get_sr() & 0x00030040) != 0x00030040) {
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}
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// read and return data
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uint8_t data = I2C1->DR;
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return data;
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}
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static void mma_stop() {
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// send stop condition
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I2C1->CR1 |= I2C_CR1_STOP;
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}
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#define PYB_USRSW_PORT (GPIOA)
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#define PYB_USRSW_PIN (GPIO_Pin_13)
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void sw_init() {
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// make it an input with pull-up
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = PYB_USRSW_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(PYB_USRSW_PORT, &GPIO_InitStructure);
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}
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int sw_get() {
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if (PYB_USRSW_PORT->IDR & PYB_USRSW_PIN) {
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// pulled high, so switch is not pressed
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return 0;
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} else {
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// pulled low, so switch is pressed
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return 1;
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}
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}
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void __fatal_error(const char *msg) {
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lcd_print_strn("\nFATAL ERROR:\n", 14);
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lcd_print_strn(msg, strlen(msg));
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for (;;) {
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led_state(PYB_LED_R1, 1);
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led_state(PYB_LED_R2, 0);
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sys_tick_delay_ms(150);
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led_state(PYB_LED_R1, 0);
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led_state(PYB_LED_R2, 1);
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sys_tick_delay_ms(150);
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}
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}
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#include "misc.h"
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#include "lexer.h"
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#include "mpyconfig.h"
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#include "parse.h"
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#include "compile.h"
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#include "runtime.h"
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py_obj_t pyb_delay(py_obj_t count) {
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sys_tick_delay_ms(rt_get_int(count));
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return py_const_none;
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}
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py_obj_t pyb_led(py_obj_t state) {
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led_state(PYB_LED_G1, rt_is_true(state));
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return state;
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}
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py_obj_t pyb_sw() {
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if (sw_get()) {
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return py_const_true;
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} else {
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return py_const_false;
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}
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}
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#include "ff.h"
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FATFS fatfs0;
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#include "nlr.h"
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/*
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void g(uint i) {
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printf("g:%d\n", i);
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if (i & 1) {
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nlr_jump((void*)(42 + i));
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}
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}
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void f() {
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nlr_buf_t nlr;
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int i;
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for (i = 0; i < 4; i++) {
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printf("f:loop:%d:%p\n", i, &nlr);
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if (nlr_push(&nlr) == 0) {
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// normal
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//printf("a:%p:%p %p %p %u\n", &nlr, nlr.ip, nlr.sp, nlr.prev, nlr.ret_val);
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g(i);
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printf("f:lp:%d:nrm\n", i);
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nlr_pop();
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} else {
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// nlr
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//printf("b:%p:%p %p %p %u\n", &nlr, nlr.ip, nlr.sp, nlr.prev, nlr.ret_val);
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printf("f:lp:%d:nlr:%d\n", i, (int)nlr.ret_val);
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}
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}
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}
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void nlr_test() {
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f(1);
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}
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*/
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void fatality() {
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led_state(PYB_LED_R1, 1);
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led_state(PYB_LED_G1, 1);
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led_state(PYB_LED_R2, 1);
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led_state(PYB_LED_G2, 1);
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}
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static const char *fresh_boot_py =
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"# boot.py -- run on boot-up\n"
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"# can run arbitrary Python, but best to keep it minimal\n"
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"\n"
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"pyb.source_dir('/src')\n"
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"pyb.main('main.py')\n"
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"#pyb.usb_usr('VCP')\n"
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"#pyb.usb_msd(True, 'dual partition')\n"
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"#pyb.flush_cache(False)\n"
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"#pyb.error_log('error.txt')\n"
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;
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// get lots of info about the board
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static void board_info() {
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// get and print clock speeds
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// SYSCLK=168MHz, HCLK=168MHz, PCLK1=42MHz, PCLK2=84MHz
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{
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RCC_ClocksTypeDef rcc_clocks;
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RCC_GetClocksFreq(&rcc_clocks);
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printf("S=%lu\nH=%lu\nP1=%lu\nP2=%lu\n", rcc_clocks.SYSCLK_Frequency, rcc_clocks.HCLK_Frequency, rcc_clocks.PCLK1_Frequency, rcc_clocks.PCLK2_Frequency);
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}
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// to print info about memory
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{
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extern void *_sidata;
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extern void *_sdata;
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extern void *_edata;
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extern void *_sbss;
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extern void *_ebss;
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extern void *_estack;
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extern void *_etext;
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extern void *_heap_start;
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printf("_sidata=%p\n", &_sidata);
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printf("_sdata=%p\n", &_sdata);
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printf("_edata=%p\n", &_edata);
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printf("_sbss=%p\n", &_sbss);
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printf("_ebss=%p\n", &_ebss);
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printf("_estack=%p\n", &_estack);
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printf("_etext=%p\n", &_etext);
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printf("_heap_start=%p\n", &_heap_start);
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}
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// free space on flash
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{
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DWORD nclst;
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FATFS *fatfs;
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f_getfree("0:", &nclst, &fatfs);
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printf("free=%u\n", (uint)(nclst * fatfs->csize * 512));
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}
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}
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int main() {
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// TODO disable JTAG
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// basic sub-system init
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sys_tick_init();
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gpio_init();
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led_init();
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// turn on LED to indicate bootup
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led_state(PYB_LED_G1, 1);
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// more sub-system init
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sw_init();
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lcd_init();
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storage_init();
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// Python init
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qstr_init();
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rt_init();
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// print a message
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printf(" micro py board\n");
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// local filesystem init
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{
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// try to mount the flash
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FRESULT res = f_mount(&fatfs0, "0:", 1);
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if (res == FR_OK) {
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// mount sucessful
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} else if (res == FR_NO_FILESYSTEM) {
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// no filesystem, so create a fresh one
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// LED on to indicate creation of LFS
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led_state(PYB_LED_R2, 1);
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uint32_t stc = sys_tick_counter;
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res = f_mkfs("0:", 0, 0);
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if (res == FR_OK) {
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// success creating fresh LFS
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} else {
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__fatal_error("could not create LFS");
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}
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// keep LED on for at least 100ms
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sys_tick_wait_at_least(stc, 100);
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led_state(PYB_LED_R2, 0);
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} else {
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__fatal_error("could not access LFS");
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}
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}
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// make sure we have a /boot.py
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{
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FILINFO fno;
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FRESULT res = f_stat("0:/boot.py", &fno);
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if (res == FR_OK) {
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if (fno.fattrib & AM_DIR) {
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// exists as a directory
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// TODO handle this case
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// see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
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} else {
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// exists as a file, good!
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}
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} else {
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// doesn't exist, create fresh file
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// LED on to indicate creation of boot.py
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led_state(PYB_LED_R2, 1);
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uint32_t stc = sys_tick_counter;
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FIL fp;
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f_open(&fp, "0:/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
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UINT n;
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f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py), &n);
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// TODO check we could write n bytes
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f_close(&fp);
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// keep LED on for at least 100ms
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sys_tick_wait_at_least(stc, 100);
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led_state(PYB_LED_R2, 0);
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}
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}
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// run /boot.py
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if (0) {
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FIL fp;
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f_open(&fp, "0:/boot.py", FA_READ);
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UINT n;
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char buf[20];
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f_read(&fp, buf, 18, &n);
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buf[n + 1] = 0;
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printf("read %d\n%s", n, buf);
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f_close(&fp);
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}
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// turn boot-up LED off
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led_state(PYB_LED_G1, 0);
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/*
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for (;;) {
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led_state(PYB_LED_G2, 1);
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sys_tick_wait_at_least(sys_tick_counter, 500);
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led_state(PYB_LED_G2, 0);
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sys_tick_wait_at_least(sys_tick_counter, 500);
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}
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*/
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// USB
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if (0) {
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void usb_init();
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usb_init();
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}
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//printf("init;al=%u\n", m_get_total_bytes_allocated()); // 1600, due to qstr_init
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//sys_tick_delay_ms(1000);
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#if 0
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// Python!
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if (0) {
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//const char *pysrc = "def f():\n x=x+1\nprint(42)\n";
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const char *pysrc =
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// impl01.py
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/*
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"x = 0\n"
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"while x < 400:\n"
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" y = 0\n"
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" while y < 400:\n"
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" z = 0\n"
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" while z < 400:\n"
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" z = z + 1\n"
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" y = y + 1\n"
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" x = x + 1\n";
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*/
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// impl02.py
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/*
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"#@micropython.native\n"
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"def f():\n"
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" x = 0\n"
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" while x < 400:\n"
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" y = 0\n"
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" while y < 400:\n"
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" z = 0\n"
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" while z < 400:\n"
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" z = z + 1\n"
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" y = y + 1\n"
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" x = x + 1\n"
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"f()\n";
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*/
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/*
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"print('in python!')\n"
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"x = 0\n"
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"while x < 4:\n"
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" pyb_led(True)\n"
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" pyb_delay(201)\n"
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" pyb_led(False)\n"
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" pyb_delay(201)\n"
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" x = x + 1\n"
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"print('press me!')\n"
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"while True:\n"
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" pyb_led(pyb_sw())\n";
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*/
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/*
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// impl16.py
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"@micropython.asm_thumb\n"
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"def delay(r0):\n"
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" b(loop_entry)\n"
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" label(loop1)\n"
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" movw(r1, 55999)\n"
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" label(loop2)\n"
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" subs(r1, r1, 1)\n"
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" cmp(r1, 0)\n"
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" bgt(loop2)\n"
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" subs(r0, r0, 1)\n"
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" label(loop_entry)\n"
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" cmp(r0, 0)\n"
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" bgt(loop1)\n"
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"print('in python!')\n"
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"@micropython.native\n"
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"def flash(n):\n"
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" x = 0\n"
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" while x < n:\n"
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" pyb_led(True)\n"
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" delay(249)\n"
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" pyb_led(False)\n"
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" delay(249)\n"
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" x = x + 1\n"
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"flash(20)\n";
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*/
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// impl18.py
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/*
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"# basic exceptions\n"
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"x = 1\n"
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"try:\n"
|
|
" x.a()\n"
|
|
"except:\n"
|
|
" print(x)\n";
|
|
*/
|
|
// impl19.py
|
|
"# for loop\n"
|
|
"def f():\n"
|
|
" for x in range(400):\n"
|
|
" for y in range(400):\n"
|
|
" for z in range(400):\n"
|
|
" pass\n"
|
|
"f()\n";
|
|
|
|
py_lexer_t *lex = py_lexer_from_str_len("<>", pysrc, strlen(pysrc), false);
|
|
|
|
if (0) {
|
|
while (!py_lexer_is_kind(lex, PY_TOKEN_END)) {
|
|
py_token_show(py_lexer_cur(lex));
|
|
py_lexer_to_next(lex);
|
|
sys_tick_delay_ms(1000);
|
|
}
|
|
} else {
|
|
// nalloc=1740;6340;6836 -> 140;4600;496 bytes for lexer, parser, compiler
|
|
printf("lex; al=%u\n", m_get_total_bytes_allocated());
|
|
sys_tick_delay_ms(1000);
|
|
py_parse_node_t pn = py_parse(lex, 0);
|
|
//printf("----------------\n");
|
|
printf("pars;al=%u\n", m_get_total_bytes_allocated());
|
|
sys_tick_delay_ms(1000);
|
|
//parse_node_show(pn, 0);
|
|
py_compile(pn, false);
|
|
printf("comp;al=%u\n", m_get_total_bytes_allocated());
|
|
sys_tick_delay_ms(1000);
|
|
|
|
if (1) {
|
|
// execute it!
|
|
|
|
// add some functions to the python namespace
|
|
rt_store_name(qstr_from_str_static("pyb_delay"), rt_make_function_1(pyb_delay));
|
|
rt_store_name(qstr_from_str_static("pyb_led"), rt_make_function_1(pyb_led));
|
|
rt_store_name(qstr_from_str_static("pyb_sw"), rt_make_function_0(pyb_sw));
|
|
|
|
py_obj_t module_fun = rt_make_function_from_id(1);
|
|
|
|
// flash once
|
|
led_state(PYB_LED_G1, 1);
|
|
sys_tick_delay_ms(100);
|
|
led_state(PYB_LED_G1, 0);
|
|
|
|
nlr_buf_t nlr;
|
|
if (nlr_push(&nlr) == 0) {
|
|
py_obj_t ret = rt_call_function_0(module_fun);
|
|
printf("done! got: ");
|
|
py_obj_print(ret);
|
|
printf("\n");
|
|
nlr_pop();
|
|
} else {
|
|
// uncaught exception
|
|
printf("exception: ");
|
|
py_obj_print((py_obj_t)nlr.ret_val);
|
|
printf("\n");
|
|
}
|
|
|
|
// flash once
|
|
led_state(PYB_LED_G1, 1);
|
|
sys_tick_delay_ms(100);
|
|
led_state(PYB_LED_G1, 0);
|
|
|
|
sys_tick_delay_ms(1000);
|
|
printf("nalloc=%u\n", m_get_total_bytes_allocated());
|
|
sys_tick_delay_ms(1000);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// benchmark C version of impl02.py
|
|
if (0) {
|
|
led_state(PYB_LED_G1, 1);
|
|
sys_tick_delay_ms(100);
|
|
led_state(PYB_LED_G1, 0);
|
|
impl02_c_version();
|
|
led_state(PYB_LED_G1, 1);
|
|
sys_tick_delay_ms(100);
|
|
led_state(PYB_LED_G1, 0);
|
|
}
|
|
|
|
// MMA testing
|
|
if (0) {
|
|
printf("1");
|
|
mma_init();
|
|
printf("2");
|
|
mma_start(0x4c, 1);
|
|
printf("3");
|
|
mma_send_byte(0);
|
|
printf("4");
|
|
mma_stop();
|
|
printf("5");
|
|
mma_start(0x4c, 1);
|
|
printf("6");
|
|
mma_send_byte(0);
|
|
printf("7");
|
|
mma_restart(0x4c, 0);
|
|
for (int i = 0; i <= 0xa; i++) {
|
|
int data;
|
|
if (i == 0xa) {
|
|
data = mma_read_nack();
|
|
} else {
|
|
data = mma_read_ack();
|
|
}
|
|
printf(" %02x", data);
|
|
}
|
|
printf("\n");
|
|
|
|
mma_start(0x4c, 1);
|
|
mma_send_byte(7); // mode
|
|
mma_send_byte(1); // active mode
|
|
mma_stop();
|
|
|
|
for (;;) {
|
|
sys_tick_delay_ms(500);
|
|
|
|
mma_start(0x4c, 1);
|
|
mma_send_byte(0);
|
|
mma_restart(0x4c, 0);
|
|
for (int i = 0; i <= 3; i++) {
|
|
int data;
|
|
if (i == 3) {
|
|
data = mma_read_nack();
|
|
printf(" %02x\n", data);
|
|
} else {
|
|
data = mma_read_ack() & 0x3f;
|
|
if (data & 0x20) {
|
|
data |= 0xc0;
|
|
}
|
|
printf(" % 2d", data);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// SD card testing
|
|
if (0) {
|
|
//sdio_init();
|
|
}
|
|
|
|
int i = 0;
|
|
int n = 0;
|
|
uint32_t stc = sys_tick_counter;
|
|
|
|
for (;;) {
|
|
sys_tick_delay_ms(10);
|
|
if (sw_get()) {
|
|
led_state(PYB_LED_G1, 1);
|
|
i = 1 - i;
|
|
if (i) {
|
|
printf(" angel %05x.\n", n);
|
|
//usb_vcp_send("hello!\r\n", 8);
|
|
} else {
|
|
printf(" mishka %4u.\n", n);
|
|
//usb_vcp_send("angel!\r\n", 8);
|
|
}
|
|
n += 1;
|
|
} else {
|
|
led_state(PYB_LED_G1, 0);
|
|
}
|
|
if (sys_tick_has_passed(stc, 500)) {
|
|
stc = sys_tick_counter;
|
|
led_toggle(PYB_LED_G2);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|