146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
#include "BSP_USART.h"
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#include "usart.h"
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#include "main.h"
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extern UART_HandleTypeDef huart1; //usart.c
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extern DMA_HandleTypeDef hdma_usart1_tx; //usart.c
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extern UART_HandleTypeDef huart3; //usart.c
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extern DMA_HandleTypeDef hdma_usart3_rx; //usart.c
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void UART2_TxDma_Init(void)
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{
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//enable the DMA transfer for the receiver request
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SET_BIT(huart1.Instance->CR3, USART_CR3_DMAT);
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}
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void UART2_TxDma_Enable(uint8_t *data, uint16_t len)
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{
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//disable DMA
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__HAL_DMA_DISABLE(&hdma_usart1_tx);
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while(hdma_usart1_tx.Instance->CR & DMA_SxCR_EN)
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{
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__HAL_DMA_DISABLE(&hdma_usart1_tx);
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}
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//clear flag
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__HAL_DMA_CLEAR_FLAG(&hdma_usart1_tx, DMA_HISR_TCIF7);
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__HAL_DMA_CLEAR_FLAG(&hdma_usart1_tx, DMA_HISR_HTIF7);
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//set data address
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hdma_usart1_tx.Instance->M0AR = (uint32_t)(data);
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//set data length
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hdma_usart1_tx.Instance->NDTR = len;
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//enable DMA
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__HAL_DMA_ENABLE(&hdma_usart1_tx);
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}
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void UART2_SendByte(uint8_t Byte)
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{
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HAL_UART_Transmit(&huart1, &Byte, 1, 0xFFFF);
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}
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void UART2_SendArray(uint8_t *Array,uint16_t Length)
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{
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for(uint16_t i=0;i<Length;i++)
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UART2_SendByte(Array[i]);
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}
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void UART2_SendString(char *String)
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{
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for(uint8_t i=0;String[i]!='\0';i++)
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UART2_SendByte(String[i]);//依次发送字符串的每一位
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}
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void UART2_SendNumber(uint32_t Number,uint8_t Length)
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{
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for(uint8_t i=0;i<Length;i++)
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UART2_SendByte(Number/USART_Pow(10,Length-i-1)%10+'0');//以文本形式发送数字每一位
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}
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void UART2_SendNumber_Sign(int32_t Number, uint8_t Length)
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{
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// 处理负数
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if (Number < 0) {
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UART2_SendByte('-');
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Number = -Number; // 转为正数（注意：INT32_MIN 有边界问题，见下方说明）
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}
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// 发送每一位数字
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for (uint8_t i = 0; i < Length; i++) {
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// 计算当前位的除数（10^(Length - i - 1)）
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uint32_t divisor = 1;
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for (uint8_t j = 0; j < Length - i - 1; j++) {
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divisor *= 10;
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}
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uint8_t digit = (Number / divisor) % 10;
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UART2_SendByte(digit + '0');
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}
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}
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void UART2_SendFloat_Sign(float value, uint8_t decimal_places)
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{
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char buffer[32]; // 足够容纳 -123456.789\0
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// 安全格式化：防止缓冲区溢出
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int len = snprintf(buffer, sizeof(buffer), "%.*f", decimal_places, value);
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// 防止 snprintf 出错（返回负数或超长）
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if (len < 0 || len >= (int)sizeof(buffer)) {
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UART2_SendString("ERR_FLOAT");
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return;
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}
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// 发送字符串
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for (int i = 0; i < len; i++) {
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UART2_SendByte(buffer[i]);
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}
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}
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uint32_t USART_Pow(uint32_t X, uint32_t Y)
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{
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uint32_t Result = 1;
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while(Y--)
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{
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Result *= X;
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}
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return Result;
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}
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void DBUS_DMA_Init(uint8_t *rx1_buf, uint8_t *rx2_buf, uint16_t dma_buf_num)
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{
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//enable the DMA transfer for the receiver request
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SET_BIT(huart3.Instance->CR3, USART_CR3_DMAR);
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//enalbe idle interrupt
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__HAL_UART_ENABLE_IT(&huart3, UART_IT_IDLE);
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//disable DMA
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__HAL_DMA_DISABLE(&hdma_usart3_rx);
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while(hdma_usart3_rx.Instance->CR & DMA_SxCR_EN)
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{
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__HAL_DMA_DISABLE(&hdma_usart3_rx);
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}
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hdma_usart3_rx.Instance->PAR = (uint32_t) & (USART3->DR);
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//memory buffer 1
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hdma_usart3_rx.Instance->M0AR = (uint32_t)(rx1_buf);
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//memory buffer 2
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hdma_usart3_rx.Instance->M1AR = (uint32_t)(rx2_buf);
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//data length
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hdma_usart3_rx.Instance->NDTR = dma_buf_num;
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//enable double memory buffer
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SET_BIT(hdma_usart3_rx.Instance->CR, DMA_SxCR_DBM);
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//enable DMA
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__HAL_DMA_ENABLE(&hdma_usart3_rx);
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}
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