37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
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#include <reent.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <string.h>
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#include "stm32f1xx_hal.h"
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#include "config.h"
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extern volatile uint8_t uart_buf[200];
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/*
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* printf sends its output to this function, this function sends it to the uart dma output buffer
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*/
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__attribute__((__used__)) int _write(int fd, const char *ptr, int len){
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#if defined DEBUG_SERIAL_ASCII && (defined DEBUG_SERIAL_USART2 || defined DEBUG_SERIAL_USART3)
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#ifdef DEBUG_SERIAL_USART2
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while(DMA1_Channel7->CNDTR != 0); // wait
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memcpy(uart_buf,ptr,len); // copy to buffer
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DMA1_Channel7->CCR &= ~DMA_CCR_EN;
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DMA1_Channel7->CNDTR = len; // set number of bytes to read
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DMA1_Channel7->CMAR = (uint32_t)uart_buf; // set buffer to read from
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DMA1_Channel7->CCR |= DMA_CCR_EN;
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#endif
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#ifdef DEBUG_SERIAL_USART3
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while(DMA1_Channel2->CNDTR != 0); // wait
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memcpy(uart_buf,ptr,len); // copy to buffer
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DMA1_Channel2->CCR &= ~DMA_CCR_EN;
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DMA1_Channel2->CNDTR = len; // set number of bytes to read
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DMA1_Channel2->CMAR = (uint32_t)uart_buf; // set buffer to read from
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DMA1_Channel2->CCR |= DMA_CCR_EN;
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#endif
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#endif
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return len;
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}
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