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张小明 2025/12/30 5:41:36
电力网站建设方案,网站建设什么最重要,搭建网站框架,国外网站域名查询雅特力单片机用串口USART_INT_TDE中断#xff08;发送缓冲区空闲时中断#xff09;比用USART_INT_TRAC#xff08;发送全部完成时中断#xff09;的 发送效率要高#xff1a;请自行验证代码的正确性#xff0c;不对此负责#xff01;#xff01;void UART0_SendData(vo…雅特力单片机用串口USART_INT_TDE中断发送缓冲区空闲时中断比用USART_INT_TRAC发送全部完成时中断的 发送效率要高请自行验证代码的正确性不对此负责void UART0_SendData(volatile Uint8 *buf, Uint8 len){union{Uint8 crc[2];Uint16 crc16;} my_crc;UART0_PointerSend buf;UART0_SendCount len 2;my_crc.crc16 Uart_GenerateCRC(buf, len);UART0_SendBuffer[len] my_crc.crc[0];UART0_SendBuffer[len 1] my_crc.crc[1];//UART0_Enable(B_FALSE, B_TRUE);UART0_Enable(B_FALSE, B_TRUE);}#define RS485_DIR_PORT GPIOF#define RS485_DIR_PIN GPIO_Pins_7#define UART0_SEND_ENABLE() GPIO_SetBits(RS485_DIR_PORT, RS485_DIR_PIN)#define UART0_RECEIVE_ENABLE() GPIO_ResetBits(RS485_DIR_PORT, RS485_DIR_PIN)void UART0_Enable( Uint8 xRxEnable, Uint8 xTxEnable){if( xRxEnable ){UART0_RECEIVE_ENABLE();USART_INTConfig(USART1, USART_INT_RDNE, ENABLE);USART_INTConfig(USART1, USART_INT_TDE, DISABLE);}if( xTxEnable ){UART0_SEND_ENABLE();USART_INTConfig(USART1, USART_INT_RDNE, DISABLE);USART_INTConfig(USART1, USART_INT_TDE, ENABLE);}}u32 V2_1_left_times_for_writeOut0;u8 started_writeOut0;void TMR4_for_when_UART0_Enable_falt(void)//20us 一次{if(V2_1_left_times_for_writeOut0){V2_1_left_times_for_writeOut--;}if(UART0_SendCount0V2_1_left_times_for_writeOut0){if(started_writeOut1){UART0_Enable(B_TRUE, B_FALSE);//这个用于保证不发生如果丢了一次UART0_Enable(B_TRUE, B_FALSE)则再也不能进入接收模式导致通讯卡死started_writeOut0;}}}//20us中断一次的定时器中断void TMR4_GLOBAL_IRQHandler(){ //100khz RCLKif (TMR_GetINTStatus(TMR4, TMR_INT_Overflow) ! RESET){TMR_ClearITPendingBit(TMR4, TMR_INT_Overflow);TMR4_for_when_UART0_Enable_falt();}}void USART1_IRQHandler(void){volatile Uint8 dummy 0;volatile Uint8 temp 0;if(USART_GetITStatus(USART1, USART_INT_ERR) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_ERR);}if(USART_GetITStatus(USART1, USART_INT_ORERR) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_ORERR);}if(USART_GetITStatus(USART1, USART_INT_NERR) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_NERR);}if(USART_GetITStatus(USART1, USART_INT_FERR) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_FERR);}if(USART_GetITStatus(USART1, USART_INT_TDE) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_TDE);if(0 ! UART0_SendCount){UART0_SendOneByte((Uint8)(*UART0_PointerSend));UART0_SendCount--;UART0_PointerSend;started_writeOut1;V2_1_left_times_for_writeOut400;//200的话2400波特率下不行400在2400波特率下可以在2400波特率下传输1个字节的时间大约 4.17毫秒所以超时时间必须大于4.2ms200*20us4ms,考虑 UART0_Enable(B_TRUE, B_FALSE); 丢了一次后TMR4_GLOBAL_IRQHandler里强制设置UART0_Enable(B_TRUE, B_FALSE)还能来得及比如6ms内回码时可以}else{USART_INTConfig(USART1, USART_INT_TDE, DISABLE);USART_INTConfig(USART1, USART_INT_TRAC, ENABLE);}}elseif(USART_GetITStatus(USART1, USART_INT_TRAC) ! RESET){USART_ClearITPendingBit(USART1, USART_INT_TRAC);USART_INTConfig(USART1, USART_INT_TRAC, DISABLE);UART0_Enable(B_TRUE, B_FALSE); //如果丢了一次UART0_Enable(B_TRUE, B_FALSE)则再也不能进入接收模式导致通讯卡死started_writeOut0;}if(USART_GetITStatus(USART1, USART_INT_RDNE) ! RESET ) //接收中断使能{Flag.ModbusFrameStart B_TRUE;Flag.ModbusFrameOver B_FALSE;Flag.UartDelay35ms 0;USART_ClearITPendingBit(USART1, USART_INT_RDNE);if(UART0_ReceiveCount 39){UART0_ReceiveBuffer[UART0_ReceiveCount] (USART_ReceiveData(USART1));UART0_ReceiveCount;}else{temp (USART_ReceiveData(USART1));}}}