aswathymohan
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Hi
I wish to take the samples from pic16f877a,4Mhz HS( if it is given a sine wave input) and plot the same.I am giving 230vp sine wave 50hz as input and transformed it into 5v range and level shifted it into positive voltages.
This is my code
I have checked the values in hyperterminal and see that the controller not even sample the peak voltage.I wish to have the samples correctly so that I can able to plot the waveform correctly.
I wish to take the samples from pic16f877a,4Mhz HS( if it is given a sine wave input) and plot the same.I am giving 230vp sine wave 50hz as input and transformed it into 5v range and level shifted it into positive voltages.
This is my code
Code:
// Loop variable
float val,val1;//Declare the adcvalue stored variables
char uart_rd[50],uart_rd1[50];
void rmsv();
void adc_uart();//adc read and uart write
void interrupt(){
if (PIR1.ADIF) {
PIR1.ADIF=0; // clear AD interrupt flag
val= (ADRESH << 8) | ADRESL; // read dadta from channel 0
{
val1=(val*325.0)/1023.0;
FloatToStr(val1,uart_rd1);
strncpy(uart_rd,uart_rd1,3);
UART1_Write_Text(uart_rd1);
//UART1_Write(10);
UART1_Write(13);
delay_us(1);
}
Delay_Cyc(3); //wait acquisition time
ADCON0.F2=1; //start conversion again
}
}
void main()
{
TRISA=0XFF;//porta as input
ADCON1 = 0x82; // AN0->AN4 selected as analog input
ADCON0 = 0b11000001; // Configue analog mode
INTCON.GIE = 1; //Enable global interrupt
INTCON.PEIE = 1; //Enable peripheral interrupt
PIE1.ADIE = 1; //Enable ADC interrupt
Delay_us(20); //wait for acquisition time
ADCON0.F2 = 1; //start conversion
// ADCON1=0X81;
UART1_Init(9600); // Initialize UART module at 9600 bps
//ADC_Init();
while(1);
}I have checked the values in hyperterminal and see that the controller not even sample the peak voltage.I wish to have the samples correctly so that I can able to plot the waveform correctly.