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tripper269
Joined: 06 May 2013
Posts: 33
Location: Toronto
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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 Posted: Fri Feb 23, 2018 5:12 pm |
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| Quote: | | I tried but couldn't make it. |
I studied this by compiling the following test program and looking at
the .LST file. I didn't test it with an ICD64 in actual operation.
| Code: |
#include <18F46K22.h>
#fuses INTRC_IO, NOWDT, BROWNOUT, PUT, NOPBADEN
#use delay(clock=4M)
#use rs232(ICD)
//======================================
void main()
{
printf("Start \n\r");
while(TRUE);
}
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Conclusions:
1. It uses a software UART (bit-banged).
2. It transmits at 38400 baud.
3. It defaults to transmitting on Pin B7 and receiving on Pin B6.
4. You can change the transmit pin to Pin C6 by doing this:
| Code: | | #use rs232(ICD, xmit=PIN_C6) |
5. You can change the default receive pin to C7 by doing this:
| Code: | | #use rs232(ICD, xmit=PIN_C6, rcv=PIN_C7) |
6. Adding the #use rs232(ICD) line causes the compiler to insert a 4.5
second delay at the start of main(). The program won't do anything until
that delay has passed. I verified this delay time with the MPLAB v8.92
simulator's stopwatch feature. |
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allenhuffman
Joined: 17 Jun 2019
Posts: 552
Location: Des Moines, Iowa, USA
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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allenhuffman
Joined: 17 Jun 2019
Posts: 552
Location: Des Moines, Iowa, USA
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| Posted: Fri Jul 05, 2019 12:21 pm |
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Fantastic! That helped.
Running it using "Build & Run" did pop up the terminal, which helps.
I have yet to get any output when in Debug mode, though.
At least now I know it works. Thank you so much.
_________________
Allen C. Huffman, Sub-Etha Software (est. 1990) http://www.subethasoftware.com
Embedded C, Arduino, MSP430, ESP8266/32, BASIC Stamp and PIC24 programmer.
http://www.whywouldyouwanttodothat.com ? |
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jeremiah
Joined: 20 Jul 2010
Posts: 1353
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| Posted: Fri Jul 05, 2019 7:43 pm |
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| allenhuffman wrote: |
Fantastic! That helped.
Running it using "Build & Run" did pop up the terminal, which helps.
I have yet to get any output when in Debug mode, though.
At least now I know it works. Thank you so much. |
it won't work in debug mode. It uses the same pins that debug mode does. |
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