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PIC24F SPI Communication setup

 
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Mrinmoy Dey



Joined: 23 Jan 2018
Posts: 44

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PIC24F SPI Communication setup
PostPosted: Mon Jul 17, 2023 3:35 am     Reply with quote
Hi,

I am using PIC24FJ512GL406, in one of my project to communicate with a flash chip of winbond over SPI. During the setup of SPI communication using setup_spi function available in device.h file I found there is no parameter for communication speed setup.

Any help regarding that will be very helpful.

Thanks in Advance.
Ttelmah



Joined: 11 Mar 2010
Posts: 19539

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PostPosted: Mon Jul 17, 2023 6:54 am     Reply with quote
Use #USE_SPI, not setup_spi.
setup_spi, is largely deprecated now.
Look also at the top of the forum here in how to use PIN_SELECT. Vital
on modern chips.

However if you must use spi_setup, then the baud goes after the mode
setting. So:
Code:

#PIN_SELECT SCK1OUT=PIN_B0

#PIN_SELECT SDO1=PIN_B1
#PIN_SELECT SDI1=PIN_B2
void main()
{
   setup_spi(SPI_MASTER | SPI_SCK_IDLE_LOW | SPI_XMIT_L_TO_H | SPI_SAMPLE_AT_MIDDLE, 400000);
   //setup for 400Kbps



Obviously with suitable settings for your SPI.
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