SPI ISR

bwhiten · Joined: 26 Nov 2003 Posts: 151 Location: Grayson, GA

I am converting from I2C PIC Master/PIC Slave communications to SPI PIC Master/PIC Slave because I need more speed in the transfers than I2C.
I used the I2C ISR in the example files and that works well. However, when I look at the Ex_SPI_Slave.c example it does not use an interrupt routine. Is there an example of SPI ISR in another file or can I just modify the I2C routine and use the spi_data_is_in and instruction type being sent instead of i2c_isr_state?
Maybe if I use the interrupt I won't even need to monitor spi_data_is_in?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

http://www.ccsinfo.com/forum/viewtopic.php?t=26888

bwhiten · Joined: 26 Nov 2003 Posts: 151 Location: Grayson, GA

Exactly what I was looking for. I did a search but never saw that particular post. Thanks again.
I will be using HW SPI on both ends of the link and using the Slave Select method to alert the slave of incoming.