[问答]

新手求助！C8051F020 单片机ADC串口程序求助！

问答对人有帮助，内容完整，我也想知道答案 0 为什么下位机向上位机发送的第一组数（共8字节）据缺失一个（第二字节），而且ADC并没有开始转换。从第二次开始正常。 #include //----------------------------------------------------------------------------- // 16-bit SFR Definitions for 'F02x //----------------------------------------------------------------------------- sfr16 ADC0 = 0xbe; // ADC0 data sfr16 RCAP2 = 0xca; // Timer2 capture/reload sfr16 RCAP3 = 0x92; // Timer3 capture/reload sfr16 TMR2 = 0xcc; // Timer2 sfr16 TMR3 = 0x94; // Timer3 //----------------------------------------------------------------------------- // Global Constants //----------------------------------------------------------------------------- #define BAUDRATE 9600 // Baud rate of UART in bps #define SYSCLK 22118400 // External crystal oscillator frequency #define SAMPLE_RATE 50000 // Sample frequency in Hz #define INT_DEC 256 // Integrate and decimate ratio #define SAR_CLK 2500000 // Desired SAR clock speed //----------------------------------------------------------------------------- // Function Prototypes //----------------------------------------------------------------------------- void Resfresh_Watchingdog(void); void OSCILLATOR_Init (void); void PORT_Init (void); void UART0_Init (void); void ADC0_Init (void); void TIMER3_Init (int counts); void ADC0_ISR (void); void Wait_MS (unsigned int ms); void HC138Sel( unsigned char x ); void Uart_Send(void); //----------------------------------------------------------------------------- // Global Variables //----------------------------------------------------------------------------- unsigned int AIN0[10],AIN1[10]; unsigned char Rec_Data[4],Send_Data[8]; //接收数组和发送数组 unsigned char Uart_flag,flag,DO,DI; unsigned char num,ch; //采集数量和通道号 unsigned char address=0x01; //从机地址0x01 long Result0,Result1,Av_ADC0,Av_ADC1; //----------------------------------------------------------------------------- // main() Routine //----------------------------------------------------------------------------- void main (void) { // WDTCN = 0xde; // Disable watchdog timer //WDTCN = 0xad; OSCILLATOR_Init (); // Initialize oscillator PORT_Init (); // Initialize cros*ar and GPIO UART0_Init (); // Initialize UART1 TIMER3_Init (SYSCLK/SAMPLE_RATE); // Initialize Timer3 to overflow at // sample rate ADC0_Init (); // Init ADC AD0EN = 1; // Enable ADC EA = 1; ES0=1; // Enable global interrupts while (1) { DI=P4; //开关量输入读取 Send_Data[0]=address; //放地址 Send_Data[1]=DO; Send_Data[2]=DI; Send_Data[3]= Av_ADC0>>8;//高四位放到数组 Send_Data[4]= Av_ADC0; //第八位放到数组 Send_Data[5]= Av_ADC1>>8;//高四位放到数组 Send_Data[6]= Av_ADC1; //第八位放到数组 Resfresh_Watchingdog(); Uart_Send(); //if(Uart_flag==0) //{ Wait_MS (3000); //延时程序 // } } } //----------------------------------------------------------------------------- // Initialization Subroutines //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // OSCILLATOR_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : None // // This routine initializes the system clock to use an 22.1184MHz crystal // as its clock source. // // //----------------------------------------------------------------------------- void OSCILLATOR_Init (void) { int i; // delay counter OSCXCN = 0x67; // start external oscillator with // 22.1184MHz crystal for (i=0; i < 256; i++) ; // wait for oscillator to start while (!(OSCXCN & 0x80)) ; // Wait for crystal osc. to settle OSCICN = 0x88; // select external oscillator as SYSCLK // source and enable missing clock // detector } //----------------------------------------------------------------------------- // PORT_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : None // // This function configures the crosar and GPIO ports. // // P0.0 digital push-pull UART TX // P0.1 digital open-drain UART RX // P1.6 digital push-pull LED // AIN0.1 analog Analog input (no configuration necessary) //----------------------------------------------------------------------------- void PORT_Init (void) { XBR0 = 0x04; // Route UART0 to crosar XBR2 \|= 0x40; // Enable crosar, weak pull-ups P0MDOUT \|= 0x01; // enable TX0 as a push-pull output P3MDOUT \|= 0xff; // enable LED as a push-pull output // P1MDOUT \|= 0x40; // enable LED as push-pull output HC138Sel( 4 ); //P0MDOUT \|= 0x01; // Set TX1 pin to push-pull //P1MDOUT \|= 0x40; // Set P1.6(LED) to push-pull } //----------------------------------------------------------------------------- // UART0_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : None // // Configure the UART1 using Timer1, for and 8-N-1. // //----------------------------------------------------------------------------- void UART0_Init (void) { SCON0 = 0x50; // SCON0: mode 1, 8-bit UART, enable RX TMOD = 0x20; // TMOD: timer 1, mode 2, 8-bit reload TH1 = -(SYSCLK/BAUDRATE/16); // set Timer1 reload value for baudrate TR1 = 1; // start Timer1 CKCON \|= 0x10; // Timer1 uses SYSCLK as time base PCON \|= 0x80; // SMOD00 = 1 TI0 = 1; // Indicate TX0 ready } //----------------------------------------------------------------------------- // ADC0_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : None // // Configure ADC0 to use Timer3 overflows as conversion source, to // generate an interrupt on conversion complete, and to use right-justified // output mode. Enables ADC end of conversion interrupt. Leaves ADC disabled. // //----------------------------------------------------------------------------- void ADC0_Init (void) { ADC0CN = 0x04; // ADC0 disabled; normal tracking // mode; ADC0 conversions are initiated // on overflow of Timer3; ADC0 data is // right-justified REF0CN = 0x07; // Enable temp sensor, on-chip VREF, // and VREF output buffer AMX0CF = 0x00; // AIN inputs are single-ended (default) AMX0SL = 0x00; // Select AIN0.0 pin as ADC mux input ADC0CF = (SYSCLK/SAR_CLK) << 3; // ADC conversion clock = 2.5MHz ADC0CF \|= 0x00; // PGA gain = 1 (default) EIE2 \|= 0x02; // enable ADC interrupts } //----------------------------------------------------------------------------- // TIMER3_Init //----------------------------------------------------------------------------- // // Return Value : None // Parameters : // 1) int counts - calculated Timer overflow rate // range is postive range of integer: 0 to 32767 // // Configure Timer3 to auto-reload at interval specified by (no // interrupt generated) using SYSCLK as its time base. // //----------------------------------------------------------------------------- void TIMER3_Init (int counts) { TMR3CN = 0x02; // Stop Timer3; Clear TF3; set sysclk // as timebase RCAP3 = -counts; // Init reload values TMR3 = RCAP3; // Set to reload immediately EIE2 &= ~0x01; // Disable Timer3 interrupts TMR3CN \|= 0x04; // start Timer3 } //-------------------------------------------------------------------------------- //发送数据 //-------------------------------------------------------------------------------- void Uart_Send() { unsigned char i; for(i=0;i<8;i++) { SBUF0=Send_Data[i]; while(!TI0); TI0=0; } } //----------------------------------------------------------------------------- // 138译码器初始化 //----------------------------------------------------------------------------- void HC138Sel( unsigned char x ) //138译码器选择通道 { P4 \|= 0x07; P4 &= ( x \| 0xF8 ); } //----------------------------------------------------------------------------- // 看门狗刷新 //----------------------------------------------------------------------------- void Resfresh_Watchingdog(void) //138译码器选择通道 { WDTCN=0Xa5; } //----------------------------------------------------------------------------- // Support Subroutines //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // Wait_MS //----------------------------------------------------------------------------- // // Return Value : None // Parameters: // 1) unsigned int ms - number of milliseconds of delay // range is full range of integer: 0 to 65335 // // This routine inserts a delay of milliseconds. // //----------------------------------------------------------------------------- void Wait_MS(unsigned int ms) { CKCON &= ~0x20; // use SYSCLK/12 as timebase RCAP2 = -(SYSCLK/1000/12); // Timer 2 overflows at 1 kHz TMR2 = RCAP2; ET2 = 0; // Disable Timer 2 interrupts TR2 = 1; // Start Timer 2 while(ms) { TF2 = 0; // Clear flag to initialize while(!TF2); // Wait until timer overflows ms--; // Decrement ms } TR2 = 0; // Stop Timer 2 } void Uart0_Rec (void) interrupt 4 { unsigned char i; if(RI0) //判断是接收终端还是发送终端？？ { RI0=0; Rec_Data[i]=SBUF0; i++; } //TI0=0; if(i==4) { i=0; Uart_flag=1; } Resfresh_Watchingdog(); if(Uart_flag==1) { //ES=0; if(Rec_Data[0]==address) //校验地址 { DO=Rec_Data[1]; //控制开关量的输出 P3=DO; // DI=P4; //读取开关量的输入 //Send_Data[0]=address; Send_Data[1]=DO; // Send_Data[2]=DI; // Send_Data[3]=Result>>8; // Send_Data[4]=Result; // Uart_Send(); //与延时程序配合使用，如果用延时程序，加词句可以将延时程序跳过，立即上传 } Uart_flag=0; } } //----------------------------------------------------------------------------- //ADC // 两路采集通道为AIN0.0和AIN0.1 //----------------------------------------------------------------------------- void ADC0_ISR (void) interrupt 15 { //unsigned char chanel; AD0INT = 0; // Clear ADC conversion complete if(AMX0SL==0x00) // AIN0.0 { AIN0[num]=ADC0; } if(AMX0SL==0x01) //AIN0.1 { AIN1[num]=ADC0; } ch++; switch(ch) // 切换通道 { case 1: AMX0SL=0x01; //chanel=0x01; break; case 2: AMX0SL=0x00; num++; //计数 ch=0; break; } /if(ch==2) { ch=0; num++; }/ if(num==10) { flag=1; num=0; } Resfresh_Watchingdog(); if(flag==1) { unsigned char i; for(i=0;i<10;i++) { Result0+=AIN0[i]; Result1+=AIN1[i]; } Av_ADC0=Result0/102430 / 4095; //求ADC0平均值 Result0=0; //清零 Av_ADC1=Result1/10*2430 / 4095 ; //求ADC1平均值 Result1=0; //清零 flag=0; } // AMX0SL=chanel; // AMX0SL=ch; } 0
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