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Receiving data with SPI

 
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EricLinderson



Joined: 19 Mar 2007
Posts: 8

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Receiving data with SPI
PostPosted: Mon Mar 19, 2007 7:31 am     Reply with quote
I'm trying to receive nmea sentences from a GPS module, and I'm trying to use SPI on my PIC18F4525. I can see the data coming from the GPS with an oscilloscope, and that pin is connected to pin 23 (SDI) on my PIC.
I've tried to use the setup_spi and then turning on the int_ssp interrupt but the interrupt never occurs... Can anyone help me with this?
I'm currently using the UART with a Bluetooth module, and that works ok.
Ttelmah
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PostPosted: Mon Mar 19, 2007 8:08 am     Reply with quote
What GPS module are you using that supports SPI?.
You are talking about data coming from the module, but SPI, requires both data and a clock. I would suggest that what is coming from the module is probably standard asynchronous serial data, and in which case it needs to connect to the serial in of the chip, and be received with the asynch serial handler, rather than SPI.

Best Wishes
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