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 parse-bytecode

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uart_core.c

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#include <unistd.h>

#include "py/mpconfig.h"

/*

* Core UART functions to implement for a port

*/

#if MICROPY_MIN_USE_STM32_MCU

typedef struct {

volatile uint32_t SR;

volatile uint32_t DR;

} periph_uart_t;

#define USART1 ((periph_uart_t*)0x40011000)

#endif

// Receive single character

int mp_hal_stdin_rx_chr(void) {

unsigned char c = 0;

#if MICROPY_MIN_USE_STDOUT

int r = read(0, &c, 1);

(void)r;

#elif MICROPY_MIN_USE_STM32_MCU

// wait for RXNE

while ((USART1->SR & (1 << 5)) == 0) {

}

c = USART1->DR;

#endif

return c;

}

// Send string of given length

void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {

#if MICROPY_MIN_USE_STDOUT

int r = write(1, str, len);

(void)r;

#elif MICROPY_MIN_USE_STM32_MCU

while (len--) {

// wait for TXE

while ((USART1->SR & (1 << 7)) == 0) {

}

USART1->DR = *str++;

}

#endif

}