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| Need help rewriting a BS2 subroutine for PIC C |
 Posted: Sun Nov 13, 2005 2:58 pm |
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Hi,
I'm just starting to learn C, and I trying to do a project using an Ultralink WWVB receiver. I have some code for the Basic Stamp 2 that I'm trying to re-write in CCS C. The code I've translated seems to almost work, but not quite and I'm having trouble getting the functionality to match. Can someone take a look?
Basic Stamp Code:
| Code: |
DIAGNOSTIC_MODE:
SEROUT TXpin,BAUD,[$02] 'execute diagnotic mode
TEMP_REG = 0 'counting register is reset to zero
Read_Mode:
DEBUG "COUNT = ",DEC TEMP_REG,CR 'display count
SERIN RXpin,BAUD,2000,no_response2,[DAT1]
IF DAT1 <> %00000011 THEN Increase_Count 'see if diagnostic mode returns a '03'hex
TEMP_REG = 0 'if a '03'hex is returned then reset counter
HIGH DatBad 'light no signal lock LED
LOW DatGood 'extinguish signal lock LED
GOTO Read_Mode 'continue checking
Increase_Count:
TEMP_REG = TEMP_REG + 1 'increment count of "good" responses
If TEMP_REG < 60 THEN Read_Mode 'after a minute of "good" responses
HIGH DatGood 'consider the receiver locked
LOW DatBad 'set LEDs to display data as valid
RETURN
no_response2:
GOTO DIAGNOSTIC_MODE
END:
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My code:
| Code: |
Void Diagnostic_Mode()
{
Byte Temp_Reg; //counting/working register
Byte Data; //data received in diagnostic mode
Temp_Reg = 0; // counting register is reset to zero
fputc(0x02, Clock); // '02' hex puts decoder in diagnotic mode
do //reading mode
{
do
{
Data=fgetc(Clock);
printf(lcd_putc,"\fData = %u\n",Data);
Output_high(DataBad); //light no signal lock LED
Output_low(DataGood); //extinguish signal lock LED
Temp_Reg = 0;
}
while (Data != 0b00000011);
Temp_Reg++;
lcd_putc(" \fEnd Mode\n");
Output_high(DataGood); 'consider the receiver locked
Output_low(DataBad); 'set LEDs to display data as valid
}
while (Temp_Reg < 60);
return;
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Argh!! I don't seem to get how to make the code work the same way given the lack of "Go to" in C........
Oh, BTW, once the module is put in "diagnostic mode" it send a status byte each second. The byte can be 0, 1, 2 or 3. If it's 3 the reply is not "good", everything else indicates a "good" response. One minute of "good" is supposed to signify that the clock is locked on the time signal.
Thanks!
Bob |
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asmallri
Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia
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| Posted: Sun Nov 13, 2005 5:21 pm |
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| Code: | Void Diagnostic_Mode()
{
Byte Data; //data received in diagnostic mode
Byte Temp_Reg = 0; //counting/working register is reset to zero
fputc(0x02, Clock); // '02' hex puts decoder in diagnotic mode
while(1) //reading mode
{
Data=fgetc(Clock);
if (Data != 0b00000011)
{
Temp_Reg++;
if (Temp_Reg >= 60)
{
lcd_putc(" \fEnd Mode\n");
Output_high(DataGood); //consider the receiver locked
Output_low(DataBad); // set LEDs to display data as valid
return;
}
}
else
{
Temp_Reg = 0;
Output_high(DataBad); //light no signal lock LED
Output_low(DataGood); //extinguish signal lock LED
printf(lcd_putc,"\fData = %u\n",Data);
}
}
}
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_________________
Regards, Andrew
http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!! |
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