SSI3 clock RX and TX configuration

Yael Oz

Hi,

I started working with Stellaris Launchpad and boosterpack.

Using IAR and set the device as LM4F120H5QR.

I'm trying to configure the SSI3 to communicate the boosterpack over SPI.

I try these command sequence:

MAP_SysCtlPeripheralEnable(SSI3_BASE);
GPIOPinConfigure(GPIO_PD0_SSI3CLK);
GPIOPinConfigure(GPIO_PD2_SSI3RX);
GPIOPinConfigure(GPIO_PD3_SSI3TX);

I receive an error in the second command (GPIOPinConfigure ) and reach to FaultISR();

What am I doing wrong?

Thanks,

Yael

0 Petrei over 12 years ago

Guru 26105 points

Hi,

First you must declare:

#include "driverlib/pin_map.h"

and second you must #define PART_LM4F120H5QD in predefined symbols section in your compiler configuration.

Petrei

0 cb1_mobile over 12 years ago in reply to Petrei

Guru 117855 points

And this occurs with such repetition that perhaps a highlighted FAQ or greater focus/detail would save posters from this fate...

(even those using "alien" IDEs)

0 Yael Oz over 12 years ago in reply to cb1_mobile

Actually, this was not the issue (all includes and defines were present).

I forgot to enable peripheral D

Add this line:

MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);

Thanks,

Yael

Arm-based microcontrollers forum