STM8S模拟串口接收

#include "bsp.h" #define Rx_Read PC_IDR_IDR5 unsigned char Uart3RxBuf[32]; unsigned char Uart3TxBuf[7]; unsigned char UART3_RxStep=0; //unsigned char UART3_RxStart=0; unsigned char UART3_RxOK=0; //unsigned int PM25Data_[PM25Data_Div]; unsigned int PM25Data; unsigned int PM1Data; unsigned int PM10Data; unsigned char GR_PM = 0; //unsigned int temp_pm; /******************************************************************************* **函数名称：void UART3_Init(unsigned int baudrate) **功能描述：初始化USART模块 **入口参数：unsigned int baudrate -> 设置串口波特率 **输出：无 *******************************************************************************/ void UART3_Init(unsigned int baudrate) { #ifdef Use_Simulate_UART3 TIM2_PSCR = 0X03; TIM2_ARRH = (uint8_t)(2200>>8); TIM2_ARRL = (uint8_t)(2200); TIM2_EGR = (uint8_t)0X01; TIM2_CR1 |= (uint8_t)0X80; TIM2_IER |= (uint8_t)0X01; // TIM2_CR1 |= (uint8_t)0X01; PC_DDR_DDR5 = 0; PC_CR1_C15 = 1; PC_CR2_C25 = 1; EXTI_CR1_PCIS = 3; #else unsigned int baud; // if(baudrate == 9600) //先写BRR2 , 再写BRR1 { UART3_BRR2 = 0X03; //9600bps @16M UART3_BRR1 = 0x68; //9600bps @16M } else { baud = 16000000 / baudrate; //设定串口相应波特率与串口时钟的分频数 UART3_BRR2 = ((unsigned char)((baud & 0xf000) >> 8 )) | ((unsigned char)(baud & 0x000f)); //先写波特比率的高4位与低4位 UART3_BRR1 = ((unsigned char)((baud & 0x0ff0) >> 4)); //后写波特比率的中间8位 } UART3_CR1_bit.UARTD = 0; //使能UART0 UART3_CR2_bit.RIEN = 1; //使能中断接收 UART3_CR2_bit.TEN = 1; //使能发送 UART3_CR2_bit.REN = 1; //接收使能 #endif } /*PM2.5指数 等级 注意事项 0-50 1级 优 参加户外活动呼吸清新空气 50-100 2级 良 可以正常进行室外活动 101-150 3级 轻度 敏感人群减少体力消耗大的户外活动 151-200 4级 中度 对敏感人群影响较大 201-300 5级 重度 所有人应适当减少室外活动 >300 6级 严重 尽量不要留在室外*/ void GetUART3Data() { if(UART3_RxOK == 1) { UART3_RxOK = 2; /******************等级评定*****************/ if(PM25Data < PM_GradeYou) GR_PM = 1; else if((PM25Data >= PM_GradeYou) && (PM25Data < PM_GradeLiang)) GR_PM = 2; else if((PM25Data >= PM_GradeLiang) && (PM25Data < PM_GradeQing)) GR_PM = 3; else if((PM25Data >= PM_GradeQing) && (PM25Data < PM_GradeZhong1)) GR_PM = 4; else if((PM25Data >= PM_GradeZhong1) && (PM25Data < PM_GradeZhong2)) GR_PM = 5; else if(PM25Data >= PM_GradeZhong2) GR_PM = 6; } } static void Sort(unsigned int array[],u8 n) { u8 i,j,k; u16 t; for(i=0;i<n-1;i++) { k = i; for(j=i+1;j<n;j++) if(array[j]<array[k]) k = j; t = array[k]; array[k] = array[i]; array[i] = t; } } unsigned int Get_AverageData(unsigned int GetFrequency[],u8 n) { u8 i; u32 temp=0; Sort(GetFrequency,n); for(i=5;i<(n-5);i++) temp += GetFrequency[i]; temp /= (n - 10); return temp; } #ifndef Use_Simulate_UART3 #pragma vector = 0x17 /**USART3接收字符中断服务函数*/ __interrupt void UART3_RX_RXNE(void) { static unsigned int Sum; if(UART3_RxStep == 0) //一帧数据的开始 { Uart3RxBuf[0] = UART3_DR; if(Uart3RxBuf[0] == 0X42) { UART3_RxStep = 1; Sum = 0; } } else if(UART3_RxStep == 1) // { Uart3RxBuf[1] = UART3_DR; if(Uart3RxBuf[1] == 0X4D) { UART3_RxStep = 2; Sum = 0x8f; } else UART3_RxStep = 0; } else { Uart3RxBuf[UART3_RxStep] = UART3_DR; if(UART3_RxStep < 30) Sum += Uart3RxBuf[UART3_RxStep]; UART3_RxStep++; if(UART3_RxStep >= 32) { if(Sum == ((u16)Uart3RxBuf[30]*256 + (u16)Uart3RxBuf[31])) { UART3_RxOK = 1; PM1Data = (u16)Uart3RxBuf[10]*256 + (u16)Uart3RxBuf[11]; PM25Data = (u16)Uart3RxBuf[12]*256 + (u16)Uart3RxBuf[13]; PM10Data = (u16)Uart3RxBuf[14]*256 + (u16)Uart3RxBuf[15]; Uart3RxBuf[4] = TVOC_Data / 256; Uart3RxBuf[5] = TVOC_Data % 256; Uart3RxBuf[6] = Temperature / 256; Uart3RxBuf[7] = Temperature % 256; Uart3RxBuf[8] = Humidity / 256; Uart3RxBuf[9] = Humidity % 256; Uart3RxBuf[16] = CO2_Result / 256; Uart3RxBuf[17] = CO2_Result % 256; Uart3RxBuf[18] = HCHO_Average / 256; Uart3RxBuf[19] = HCHO_Average % 256; } UART3_RxStep = 0; //接收指针控制 // UART3_RxStart = 0; //接收复位90ms } } UART3_SR_RXNE = 0; //清除中断标志 } #endif #ifdef Use_Simulate_UART3 u8 RX_RDATA_Count = 0; u8 RX_Bit = 0; u8 RX_Continuity_Bit = 0; u16 TIM2_CNTR; u8 RX_RDAT; u8 RX_RDATA[32]; u8 RX_RDAT_OK = 0; #pragma vector=0xF __interrupt void TIM2_UPD_OVF_BRK_IRQHandler(void) { if(RX_Bit) { RX_Continuity_Bit = 10 - RX_Bit; TIM2_CNTR = RX_Continuity_Bit*2000; RX_Bit = 10; while(RX_Continuity_Bit) { RX_RDAT |= (u8)(0x01<<(RX_Bit - RX_Continuity_Bit - 1)); RX_Continuity_Bit--; } if(RX_Bit==10) { RX_Bit = 0; RX_RDAT_OK = 1; RX_RDATA[RX_RDATA_Count] = RX_RDAT; RX_RDATA_Count++; if(RX_RDATA_Count>=32) RX_RDATA_Count = 0; RX_RDAT = 0; } } TIM2_CR1 &= (uint8_t)~0X01; TIM2_CNTRH = 0; TIM2_CNTRL = 0; TIM2_SR1 &= (uint8_t)(~0X01); } u8 t2_flag = 1; u8 t1_flag = 0; u16 CO2_Temp; u16 CO2_CountTemp; u16 CO2_DataH; u16 CO2_DataHL; u8 CO2_Data_OK = 0; #pragma vector = 7 //设置串口1接收中断向量号 = 20 __interrupt void EXTI_PORTC_IRQHandler(void) { if(t2_flag != Rx_Read) { t2_flag = Rx_Read; TIM2_CR1 &= (uint8_t)~0X01; TIM2_CNTR = (u16)(TIM2_CNTRH*256); TIM2_CNTR += (u16)TIM2_CNTRL; TIM2_CNTRH = 0; TIM2_CNTRL = 0; TIM2_CR1 |= (uint8_t)0X01; if(TIM2_CNTR > 2000) { RX_Bit = 0; return; } if(TIM2_CNTR > 900) RX_Continuity_Bit = TIM2_CNTR / 200; else if(TIM2_CNTR > 500) RX_Continuity_Bit = TIM2_CNTR / 185; else RX_Continuity_Bit = TIM2_CNTR / 170; RX_Bit += RX_Continuity_Bit; if(RX_Bit >10) RX_Bit = 0; if(Rx_Read == 0) { while(RX_Continuity_Bit) { RX_RDAT |= (u8)(0x01 << (RX_Bit - RX_Continuity_Bit - 1)); RX_Continuity_Bit--; } } if(RX_Bit==10) { RX_Bit = 0; RX_RDATA[RX_RDATA_Count] = RX_RDAT; RX_RDATA_Count++; if(RX_RDATA_Count >= 32) RX_RDATA_Count = 0; RX_RDAT = 0; } } if(t1_flag != CO2_Read) { t1_flag = CO2_Read; CO2_CountTemp = Time4_Count; if(CO2_Read) { CO2_DataHL = CO2_CountTemp > CO2_Temp ? CO2_CountTemp - CO2_Temp : 1000 + CO2_CountTemp - CO2_Temp; if(CO2_DataHL < 200) CO2_DataHL += 1000; CO2_Temp = CO2_CountTemp; CO2_Data_OK |= 0X01; } else { CO2_DataH = CO2_CountTemp > CO2_Temp ? CO2_CountTemp - CO2_Temp : 1000 + CO2_CountTemp - CO2_Temp; } } } #endif