124 lines
4.0 KiB
C
124 lines
4.0 KiB
C
#include "../main/SystemInclude.h"
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const u32 baudRateVaule[6] ={4800, 9600, 19200, 38400, 57600, 115200};
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COM_DATA_TypeDef comState;
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void StartDMAForRxdMainUartData(void)
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{
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#ifndef ENABLE_TURN_OFF_RS485
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#pragma message("[undefined] ENABLE_TURN_OFF_RS485")
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#elif(ENABLE_TURN_OFF_RS485)
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RS485_Enable_RX();
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#endif
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comState.state.ReceivedData = 0 ; //重置接收完成标志
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comState.state.SendingData = 0 ; //重置发送中标志
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DMA_UART_AnyLength_Rx_Init(baudRateVaule[baudRate]);//初始化UART DMA接收并开始接收
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//接收指针指向接收数组
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comState.state.ReceivedData = 0 ;//接收完成标志位
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}
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void DMAForUART_Tx_Callback(void)
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{
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comState.state.SendingData = 0 ; //UART DMA发送完成
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LHL_DMA_Stop(&DMA_Handle_UartTx); //关闭DMA发送数据
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RestartDMAForRxdMainUartData(); //切换回接收
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}
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void StartDMAForTxdMainUartData(void)
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{
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LHL_DMA_Stop(&DMA_Handle_UartRx);//关闭DMA接收数据
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#ifndef ENABLE_TURN_OFF_RS485
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#pragma message("[undefined] ENABLE_TURN_OFF_RS485")
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#elif(ENABLE_TURN_OFF_RS485)
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RS485_Enable_TX();
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#endif
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comState.state.SendingData = 1 ;
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comState.TxLenth = MBBuf.TxdLen;
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// memcpy(comState.TxdData, MBBuf.TxPointer, comState.TxLenth );
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// for (u8 i=0;i<comState.TxLenth;i++) printf("%c",comState.TxdData[i]);
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DMA_UART_Tx_Init();//初始化DMA 并开始传输
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DMA_register_irq_callback(DMA_CHANNEL_UART_Tx,NULL,DMAForUART_Tx_Callback);//注册传输完成中断
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}
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void RestartDMAForRxdMainUartData(void)
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{
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#ifndef ENABLE_TURN_OFF_RS485
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#pragma message("[undefined] ENABLE_TURN_OFF_RS485")
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#elif(ENABLE_TURN_OFF_RS485)
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RS485_Enable_RX();
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#endif
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comState.state.ReceivedData = 0 ;//接收完成标志位
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DMA_DMAMUX_CFG(DMA_CHANNEL_UART_Rx,REQUEST_SOURCE_UART_RX);//将DMAMUX链接回到串口接收通道
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DMA_Handle_UartRx.Init.Dest_Address = (uint32_t)comState.RxdData;//重置DMA目标地址到接收数组起始地址
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LHL_DMA_GenerateTCD(&DMA_Handle_UartRx, &DMA_Handle_UartRx.Init, (DMA_DES_N_TypeDef *)(DMA_DES_N_BASE + 32u * DMA_Handle_UartRx.Channel)); /* 写入DMA寄存器 */
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LHL_DMA_Start(&DMA_Handle_UartRx); /*开始接收*/
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}
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//void RestartDMAForTxdMainUartData(void)
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//{
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// LHL_DMA_Stop(&DMA_Handle_UartRx);//关闭DMA接收数据
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// comState.state.SendingData = 1 ;
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// comState.TxLenth = MBBuf.TxdLen;
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// memcpy(comState.TxdData, MBBuf.TxPointer, comState.TxLenth );
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//
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// DMA_Handle_UartTx.Init.Src_Address = (uint32_t)&comState.TxdData; // 源：缓存区
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// DMA_Handle_UartTx.Init.Repetition = comState.TxLenth ;
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// LHL_DMA_GenerateTCD(&DMA_Handle_UartTx, &DMA_Handle_UartTx.Init, (DMA_DES_N_TypeDef *)(DMA_DES_N_BASE + 32u * DMA_Handle_UartTx.Channel)); /* 写入DMA寄存器 */
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// LHL_DMA_Start(&DMA_Handle_UartTx);
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// DMA_register_irq_callback(DMA_CHANNEL_UART_Tx,NULL,DMAForUART_Tx_Callback);//注册传输完成中断
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//}
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void ReceivedDataProcessing(void)
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{
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comState.state.ReceivedData = 0 ; //重置接收完成标志
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Get_UART_Rx_ActualLength();//更新接收长度
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MBBuf.RxdLen = comState.RxLenth; //接收数据长度
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MBBuf.RxPointer = comState.RxdData; //接收数据
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MBBuf.TxPointer = comState.TxdData; //发送数据
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if(ModBusProtocolDetection()) //检测到Modbus协议
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{
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ModBusDataProcessing(); //协议处理函数 协议处理后回复数据在MBBuf.RxPointer处move到MBBuf.TxPointer，也就是实际comState.TxdData存储区域
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StartDMAForTxdMainUartData();//回复帧
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}
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else RestartDMAForRxdMainUartData();//继续重新接收(能够使通信失败时重新复位)
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}
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/*********************************************************************************************************************************************/
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/* 带RS485的控制 */
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/*********************************************************************************************************************************************/
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#ifndef ENABLE_TURN_OFF_RS485
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#pragma message("[undefined] ENABLE_TURN_OFF_RS485")
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#elif(ENABLE_TURN_OFF_RS485)
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void RS485_Enable_TX(void)
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{
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RS485DE_OUTPUT();
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ENABLE_TXD();
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}
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void RS485_Enable_RX(void)
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{
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RS485DE_OUTPUT();
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ENABLE_RXD();
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}
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#endif
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