SkyLiCoder
88702e2832
- Add .dma_buf section in RAM_D1 for DMA-accessible USART instance pool. DTCM (0x20000000) is not reachable by DMA on STM32H7, causing bus errors (TE) when DMA writes to malloc'd buffers placed in DTCM by the XG linker script. - Replace malloc with static pool (usart_pool[]) placed in .dma_buf section. - In RxEventCallback, set recv_buff_size from Size so module callbacks know how many bytes were actually received. - Use USART_RXBUFF_LIMIT (256) as the DMA transfer size instead of per-module recv_buff_size. The actual buffer is always 256 bytes. - Remove recv_buff_size from USART_Init_Config_s; it is now set at runtime. - Flush RDR, clear error flags, and clear stale DMAR in error callback to prevent residual conditions from re-triggering errors on DMA restart. - Switch Vision module from UART10 to UART1.
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#include "HC05.h"
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#include "bsp_usart.h"
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#define HC05_BUFFERSIZE HC05_DATASIZE+2 // HC05发送和接收数据buffer大小，不得大于256
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#define FRAME_HEAD 0XAA // 帧头
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#define FRAME_END 0X55 // 帧尾
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static HC05 hc05_msg; // HC05通信数据
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static USARTInstance *hc05_usart_instance; // HC05串口通信实例
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static uint8_t hc05_init_flag = 0; // HC05初始化标志位
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// *hc05_usart_instance串口回调函数
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static void HC05RxCallback()
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{
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uint8_t *rxbuff;
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rxbuff = hc05_usart_instance->recv_buff;
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// 帧头帧尾判断
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if(rxbuff[0] == FRAME_HEAD && rxbuff[HC05_BUFFERSIZE - 1] == FRAME_END)
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{
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for(int i = 0; i < HC05_DATASIZE; i++)
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hc05_msg.recv_data[i] = (uint8_t)rxbuff[i+1];
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}
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return;
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}
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// HC05串口接收初始化
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HC05 *HC05Init(UART_HandleTypeDef *hc05_usart_handle)
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{
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USART_Init_Config_s conf;
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conf.module_callback = HC05RxCallback;
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conf.usart_handle = hc05_usart_handle;
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hc05_usart_instance = USARTRegister(&conf);
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hc05_init_flag = 1;
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return (HC05*)&hc05_msg;
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}
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// HC05串口发送函数，一次最多发送HC05_DATASIZE个数据
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void HC05_SendData(uint8_t *data, uint8_t data_num)
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{
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// 发送数据中加入帧头和帧尾
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hc05_msg.send_data[0] = FRAME_HEAD;
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for (int i = 0; i < data_num; i++)
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hc05_msg.send_data[i+1] = data[i];
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hc05_msg.send_data[HC05_BUFFERSIZE - 1] = FRAME_END;
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// 发送数据
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USARTSend(hc05_usart_instance, hc05_msg.send_data, data_num+2, USART_TRANSFER_IT);
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} |