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53 lines
1.1 KiB
53 lines
1.1 KiB
2 years ago
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/**
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* TODO file description
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*/
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#include <string.h>
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#include "uart_stdout.h"
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#include "FreeRTOS.h"
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#include "main.h"
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#define USE_CRITICAL 0
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void stdout_putchar(char c) {
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#if USE_CRITICAL
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portENTER_CRITICAL();
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#endif
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while (!LL_USART_IsActiveFlag_TXE(USART_DEBUG)) {}
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LL_USART_TransmitData8(USART_DEBUG, c);
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while (!LL_USART_IsActiveFlag_TC(USART_DEBUG)) {}
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#if USE_CRITICAL
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portEXIT_CRITICAL();
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#endif
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}
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void stdout_write(const char *pcBuffer, const size_t iLength) {
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#if USE_CRITICAL
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portENTER_CRITICAL();
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#endif
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while (!LL_USART_IsActiveFlag_TXE(USART_DEBUG)) {}
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int cnt = (int) iLength;
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while (cnt-- > 0) {
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char c = *pcBuffer++;
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LL_USART_TransmitData8(USART_DEBUG, c);
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while (!LL_USART_IsActiveFlag_TC(USART_DEBUG)) {}
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}
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#if USE_CRITICAL
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portEXIT_CRITICAL();
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#endif
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}
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void stdout_puts(const char *pcBuffer) {
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stdout_write(pcBuffer, strlen(pcBuffer));
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}
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/**
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* @brief Retargets the C library printf function to the USART.
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* @param None
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* @retval None
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*/
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int _write(int fd, const char *pcBuffer, const int iLength) {
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stdout_write(pcBuffer, iLength);
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return iLength;
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}
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