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No SPI clocks PIC16F18424

 
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JerryR



Joined: 07 Feb 2008
Posts: 190

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No SPI clocks PIC16F18424
PostPosted: Mon Mar 09, 2026 11:04 am     Reply with quote
Can anyone tell me why this code does not generate clocks on SPI1? No clocks confirmed with logic analyser and o-scope.

PCWH v5.121 uC- 16F18424

Thanks!



Code:

#include <16F18424.h>


#use delay(clock=32000000) // 8 MHz internal osc
#fuses RSTOSC_HFINTRC_32MHZ

#use spi(MASTER, BITS=8, MODE=0, BAUD=100000)


#pin_select SCK1 = PIN_C0
#pin_select SDI1 = PIN_C1

//=============================================================================
void main ()
{
int8 value1,value2;


while (1)
    {
    value1= spi_xfer (0);
    value2= spi_xfer (0);
    }
}
gaugeguy



Joined: 05 Apr 2011
Posts: 358

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PostPosted: Mon Mar 09, 2026 12:00 pm     Reply with quote
General comments:
Put the pin_select before # use spi and add SPI1 into #use spi to force it to use the hardware.
JerryR



Joined: 07 Feb 2008
Posts: 190

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PostPosted: Mon Mar 09, 2026 12:30 pm     Reply with quote
Thanks so much for your consideration. Generating clocks now.
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