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Using SPI1 to Interface Accelerometer on K20 MQX...

Question asked by blow_the_whistle on Dec 6, 2012
Latest reply on Dec 10, 2012 by blow_the_whistle

I'm trying to hook up an external Accelerometer via the K20 tower board + Proto board peripheral card wired to accelerometer.

 

I tried to follow the example under MQX, whereby the tower talks to an EEPROM through SPI0.  I basically ported this example over to SPI1 and changed the code to just try and write a few simple accelerometer commands.

 

The problem is I can't even see the SCLK or Chip Select on a scope.  It seems that maybe the pin mux is wrong, so I modified init_gpio.c under BSP to follow our pinmux (using K20 Port B 11, 12, 13, 17 ATL2).  Still no function.

 

Is there a simple example of using SPI1 port to read and write (preferably without MQX, but MQX would be helpful too).

 

Is there a straight forward document regarding changing PINMUX in the BSP (SPI1 Port B in my case).

 

Thanks!

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