/* Copyright (c) Microsoft Corporation.
   Licensed under the MIT License. */

#include "stm32u5xx_hal.h"

#include "board_init.h"

int __io_putchar(int ch)
{
    HAL_UART_Transmit(&huart1, (uint8_t*)&ch, 1, HAL_MAX_DELAY);
    return ch;
}

int __io_getchar(void)
{
    uint8_t ch;
    HAL_UART_Receive(&huart1, &ch, 1, HAL_MAX_DELAY);

    /* Echo character back to console */
    HAL_UART_Transmit(&huart1, &ch, 1, HAL_MAX_DELAY);

    /* And cope with Windows */
    if (ch == '\r')
    {
        uint8_t ret = '\n';
        HAL_UART_Transmit(&huart1, &ret, 1, HAL_MAX_DELAY);
    }

    return ch;
}

#ifdef __ICCARM__
size_t __read(int file, unsigned char* ptr, size_t len)
#elif __GNUC__
int _read(int file, char* ptr, int len)
#else
#error unknown compiler
#endif
{
    int DataIdx;

    for (DataIdx = 0; DataIdx < len; DataIdx++)
    {
        *ptr++ = __io_getchar();
    }

    return len;
}

#ifdef __ICCARM__
size_t __write(int file, const unsigned char* ptr, size_t len)
#elif __GNUC__
int _write(int file, char* ptr, int len)
#else
#error unknown compiler
#endif
{
    int DataIdx;

    for (DataIdx = 0; DataIdx < len; DataIdx++)
    {
        __io_putchar(*ptr++);
    }
    return len;
}