35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
#include "bsp_usart1.h"
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void bsp_usart1_init(uint32_t baudrate)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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USART_InitStructure.USART_BaudRate = baudrate;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Tx;
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USART_Init(USART1, &USART_InitStructure);
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USART_Cmd(USART1, ENABLE);
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}
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int _write(int fd, char *buffer, int size)
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{
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for (int i = 0; i < size; i ++) {
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while((USART1->STATR & USART_FLAG_TC) == RESET);
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USART1->DATAR = buffer[i];
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}
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return size;
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}
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