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creativity Guest
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16f877, ccs, adc, serial communication |
Posted: Wed Sep 13, 2006 12:55 am |
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hi,
i want to read two analog input and after converting them to dijital, i will sent them to serial port one by one. i have writen the following code but something is wrong, do you have any idea?
//////////////////////////////////////////
// ADC and Serial Communication //
// 2 channel Analog Input //
// 1 channel serial digital RS232 output//
// Ali Özgür Argunşah //
// argunsah@su.sabanciuniv.edu //
//////////////////////////////////////////
#include <16F877.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12
void main() {
long int input1;
setup_adc(ADC_CLOCK_INTERNAL);
setup_adc_ports(ALL_ANALOG);
//delay_ms(2000);
do {
set_adc_channel(0);
delay_cycles(60);
input1 = read_adc();
putc(input1);
set_adc_channel(1);
delay_cycles(60);
input1 = read_adc();
putc(input1);
} while(TRUE);
} |
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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Posted: Wed Sep 13, 2006 1:11 am |
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What do you mean by "something is wrong" ?
Tell us what you expect to see, and what you are actually seeing. |
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creativity Guest
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Posted: Wed Sep 13, 2006 1:43 am |
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I expect to read the serial output of 16f877 with a matlab code given below. I gave a sinus signal to one input and zero to the second one. i expect to see a sinus with some zeros inside (one sin signal and one zero, and so on) but i only see some random signal. as you see more than "something" is wrong
s1 = serial('COM3', 'BaudRate', 9600,'Databits',10);
fopen(s1);
eye=zeros(512*2,1);
for i=0:1
eye(i*512+1:i*512+512) = fread(s1)
% plot(eye)
end
plot(eye);
fclose(s1); |
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Ttelmah Guest
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Posted: Wed Sep 13, 2006 2:46 am |
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How many Databits should there be?...
Best Wishes |
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creativity Guest
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Posted: Wed Sep 13, 2006 3:57 am |
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i changed code to the code below and it works:
//////////////////////////////////////////
// ADC and Serial Communication //
// 2 channel Analog Input //
// 1 channel serial digital RS232 output//
// Ali Özgür Argunşah //
// argunsah@su.sabanciuniv.edu //
//////////////////////////////////////////
#include <16F877.h>
#device adc=8
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, parity=N, bits=8) // Jumpers: 8 to 11, 7 to 12
void main() {
long int input1;
setup_adc(ADC_CLOCK_INTERNAL);
setup_adc_ports(ALL_ANALOG);
//delay_ms(2000);
do {
set_adc_channel(0);
delay_cycles(60);
input1 = read_adc();
putc(input1);
set_adc_channel(1);
delay_cycles(60);
input1 = read_adc();
putc(input1);
} while(TRUE);
}
thank you for all replies. |
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