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Cafe'
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| TimeOut -RS232 |
 Posted: Mon Apr 09, 2007 10:39 pm |
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| Code: |
#include <18f452.h> //Device in use
#include <stdlib.h>
#include <CTYPE.h>
#include <STRING.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(stream=CH1,baud=9600,xmit=PIN_C6,rcv=PIN_C7)//Hw UART-->INT RDA
#use rs232(stream=CH2,baud=9600,xmit=PIN_B2,rcv=PIN_B1,TIMEOUT=5000,ERRORS)//SW UART-->not use an interrupt services
/*****************************************************************************/
#define Time_out_status PIN_D1
#define Normol_status PIN_D4
#define Valve_status PIN_D0
/************************* Variable Decralation *****************************/
BOOLEAN RX=0,MODE;
int i,next_in=0;
float Inact_valve,act_valve,Ovalue;//,O_actu,Cvalue;
byte Otemp[8],Temp_Command[8],Ctemp[5];
char Command;
unsigned char act_str[8],Inact_str[8];
char *ptr;
/*****************************************************************************/
/************************ Sub Functions Decralation**************************/
void CHECK_Valve(float);
void receive_untill(char);
void recv_ox(void);
void task_timeout(void);
/*****************************************************************************/
/************************ INT Rx Service Routine ***************************/
#INT_RDA //Rx PIN Connect to D.O. Meter
void hw_uart_isr (){
char rs232_temp;
rs232_temp = fgetc(CH1);
Temp_Command[next_in]=rs232_temp;
if (rs232_temp==0x0d){
//next_in=0;
ptr = strchr(Temp_Command,'C');
Command = *(ptr+1);//(Temp_Command[next_in-5]);
Ctemp[0]= *(ptr+2);//(Temp_Command[next_in-4]);
Ctemp[1]= *(ptr+3);//(Temp_Command[next_in-3]);
Ctemp[2]= *(ptr+4);//(Temp_Command[next_in-2]); //Must be " . "
Ctemp[3]= *(ptr+5);//(Temp_Command[next_in-1]);
Ctemp[4]= 0x00;
next_in=0;
switch (Command){
case 'A' :
MODE=1;
strcpy(act_str,Ctemp);
//delay_ms(100);
fprintf(CH1,"RA%s\n\r",Ctemp);
RX=1;
break;
case 'I' :
MODE=0;
strcpy(Inact_str,Ctemp);
//delay_ms(100);
fprintf(CH1,"RI%s\n\r",Ctemp);
RX=1;
break;
default :
break;
}//close switch
return;
} else
next_in++;
return;
}//Close sub routine
/*****************************************************************************/
/************************** MAIN Routine *****************************/
void main ()
{
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
set_tris_d(0b11101100);//Set D0 for Output port
next_in=0;
for(;;){
if(RX){
if(MODE){
act_valve=atof(act_str);
RX=0;
}else
Inact_valve=atof(Inact_str);
RX=0;
}//Close if RX
delay_ms(2000);//wait
recv_ox();//go to get Data and cheak for toggle valve
CHECK_Valve(OValue);// Cheak for open and close
fprintf(CH1,"%3.1f",OValue);
}
}
/*****************************************************************************/
/*************************** CHECK_Valve Routine ***************************/
void CHECK_Valve(float Ans){
if (Ans <=act_valve){
output_high(PIN_D0);
//break;
}else if ((Ans >act_valve) & (Ans >= Inact_valve)){
output_low(PIN_D0);
}
}
/***************************************************************************/
/*********************** receive_untill Routine **************************/
void receive_untill(char cpr){
char temp;
do{
temp=fgetc(CH2);
if(temp==0){
task_timeout();
}
}while(!(temp==cpr));
}
/***************************************************************************/
/*************************** recv_ox Routine *****************************/
void recv_ox(void){
byte temp[16];
do{
receive_untill(0x02);
i=0;
do{
temp[i]=fgetc(CH2);
if(temp==0){
task_timeout();
}
}while(!(temp[i++]==0x0d));
}while(!(i>14));
Otemp[0]=*(temp+11);
Otemp[1]=*(temp+12);
Otemp[2]='.';
Otemp[3]=*(temp+13);
Otemp[4]=0x00;
OValue = atof(Otemp);//now OValue already a float value
}
void task_timeout(){
char time_error;
do {
fprintf(CH1,"Time Out\n\r");
time_error =fgetc(CH2);
delay_ms(2000);
}while(!(time_error==0));
}
/*****************************************************************************/
/********************************** End **************************************/
/*****************************************************************************/
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My code check for time out 2 times. 1. recive_untill and 2.recv_ox
when disconnect in recive_untill UART can come back read a data because
i have (while!(temp==cpr)) cpr is a start of frame but it not work in case of recv_ox because i don't know why?
now i need a function for Resart or goto read start of frame...
please help me, this is the last chance for me.... |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Apr 09, 2007 11:18 pm |
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| Quote: |
#use rs232(stream=CH1,baud=9600,xmit=PIN_C6,rcv=PIN_C7)
#use rs232(stream=CH2,baud=9600,xmit=PIN_B2,rcv=PIN_B1,TIMEOUT=5000,ERRORS) |
You have ERRORS in the software UART. It doesn't work with the software
UART. It only works with the hardware UART. You need to move it to
the CH1 UART statement.
| Quote: |
rs232_temp = fgetc(CH1);
Temp_Command[next_in]=rs232_temp;
if (rs232_temp==0x0d){
//next_in=0;
ptr = strchr(Temp_Command,'C'); |
In the code above, you're putting incoming characters into an array.
You don't check to see if the index (next_in) has gone past the end
of the array. Also, you're using a string function (strchr), but you
haven't put a zero byte (0x00) on the end of the received characters,
and therefore the array is not a string. The strchr() function needs
to see the 0x00 at the end so it know when to stop searching.
Your code has many problems beyond these. You're doing fprintf()
operations inside the isr. You shouldn't do time-comsuming operations
in an isr. You have a return statement at the end of the isr. You don't
need it. No CCS example code in any example file has a 'return' at the
end of an isr. Etc. |
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