nitishn5
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I am trying to interface an 16F887 and MATLAB using the serial port.
I am using the CCS C compiler.
I am able to run the ex_float.c example using hyperterminal.
But when I tried the following code to get 3 characters from MATLAB, it is giving weird numbers.
In MATLAB I run the following after the LCD shows "Ready"
I am getting numbers that are way off. for the above case, I have to run the matlab code 4-5 times to get the mcu to respond. And then I get values such as A = 1.0, B=1.0, C = 1461.0.
I tried with integer numbers and the problem is similar. The resulting numbers are different that those entered.
I am using the CCS C compiler.
I am able to run the ex_float.c example using hyperterminal.
But when I tried the following code to get 3 characters from MATLAB, it is giving weird numbers.
Code:
#include<16F887.h>
#fuses HS, NOWDT, PUT, NOPROTECT, NODEBUG, BROWNOUT, NOLVP, NOCPD, NOWRT
#use delay (clock=4000000)
#use rs232(baud=9600, xmit=PIN_E2, rcv=PIN_E1, stream=COM1, ERRORS)
#include <stdlib.h>
#include<flex_lcd.c>
#include <INPUT.c>
float a = 0;
float b = 0;
float c = 0;
void main()
{
delay_us(50);
output_low(PIN_D7);
lcd_init();
lcd_putc("\fReady");
a = get_float();
b = get_float();
c = get_float();
while(TRUE)
{
printf(lcd_putc,"\f A = %f", a);
delay_ms(500);
printf(lcd_putc,"\f B = %f", b);
delay_ms(500);
printf(lcd_putc,"\f C = %f", c);
delay_ms(500);
}
}In MATLAB I run the following after the LCD shows "Ready"
Code:
clc; clear all;
sercon = serial('COM1',...
'ByteOrder', 'littleEndian',...
'BaudRate', 9600,...
'DataBits', 8,...
'DataTerminalReady', 'on',...
'FlowControl', 'none',...
'Parity', 'none',...
'RequestToSend', 'off',...
'StopBits', 1,...
'Terminator', 'LF');
fopen(sercon);
% fprintf(sercon, '%s\f', '');
pause(0.5);
fprintf(sercon, '12.3');
pause(0.5);
fprintf(sercon, '23.4');
pause(0.5);
fprintf(sercon, '154.6');
pause(0.5);
fclose(sercon);
delete(sercon);I am getting numbers that are way off. for the above case, I have to run the matlab code 4-5 times to get the mcu to respond. And then I get values such as A = 1.0, B=1.0, C = 1461.0.
I tried with integer numbers and the problem is similar. The resulting numbers are different that those entered.