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theteaman
Joined: 04 Aug 2006
Posts: 98
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| It seems not possible to use 'stream' with #int_rda |
 Posted: Sun Apr 12, 2009 1:57 am |
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Hi,
It seems that including a stream identifier in a use rs232, such as
| Code: |
#use rs232(baud=38400, xmit=PIN_C6, rcv=PIN_C7, PARITY=N, STREAM=B1)
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causes a serial hardware interrupt to never be triggered. Removing the stream identifier, makes everything work! Eg.
| Code: |
#use rs232(baud=38400, xmit=PIN_C6, rcv=PIN_C7, PARITY=N)
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The stream identifier is not currently used in any way so it cannot be causing the code to fail somehow.. can anyone explain a way around this? Below is the code:
| Code: |
#use rs232(baud=38400, xmit=PIN_C0, PARITY=N, STREAM=B2)
#use rs232(baud=38400, xmit=PIN_C6, rcv=PIN_C7, PARITY=N)
#INT_RDA
void rda_isr(void)
{
unsigned char c = getc();
if(c=='a') output_high(PIN_B7);
}
void main(void)
{
enable_interrupts(global);
enable_interrupts(int_rda);
set_tris_b(0);
set_tris_c(0b10000000);
while(1);
}
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As stated above, removing the 'stream=b2' makes everything work with the interrupt being called properly. Any help appreciated, thanks. |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Sun Apr 12, 2009 2:48 am |
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Unfortunately, you didn't either mention a chip or a compiler version.
Generally, when you use a stream identifier with the hardware UART, also the ISR getch() must be changed to fgetc(). Did you?
To save us further guesses, please give a complete (minimal) code example of the non-working stream version. |
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theteaman
Joined: 04 Aug 2006
Posts: 98
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| Posted: Sun Apr 12, 2009 6:41 am |
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FvM, replacing the getc with fgetc(stream) worked.. thanks for your help!  |
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