Tool/software: TI-RTOS
I'm trying to set up three GPIO pins. Based off the structure of some of the examples included in CCS8 i was able to get two inputs successfully working, using PA2 and PA3. My third input is being run off a seperate port base, PD0. I've verified that the hardware switches that I am using are correctly sending into pin PD0. I suspect that this problem has something to do with port D having ADC's but I'm not certain. I know that PD[7], as well as PC[3:0] and PE[7], are locked but I don't think that should affect my ability to use PD0.
/*
* =============================== GPIO ===============================
*/
/* Place into subsections to allow the TI linker to remove items properly */
#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_SECTION(GPIOTiva_config, ".const:GPIOTiva_config")
#endif
#include <ti/drivers/GPIO.h>
#include <ti/drivers/gpio/GPIOTiva.h>
/*
* Array of Pin configurations
* NOTE: The order of the pin configurations must coincide with what was
* defined in EK_TM4C129EXL.h
* NOTE: Pins not used for interrupts should be placed at the end of the
* array. Callback entries can be omitted from callbacks array to
* reduce memory usage.
*/
GPIO_PinConfig gpioPinConfigs[] = {
/* Input pins */
/* EK_TM4C129EXL_USR_INP1 */
GPIOTiva_PA_2 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,
/* EK_TM4C129EXL_USR_INP2 */
GPIOTiva_PA_3 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,
//EK_TM4C129EXL_GPIO_D0
GPIOTiva_PD_0 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,
/* Output pins */
/* EK_TM4C129EXL_USR_D1 */
GPIOTiva_PN_1 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW,
/* EK_TM4C129EXL_USR_D2 */
GPIOTiva_PN_0 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW
};
/*
* Array of callback function pointers
* NOTE: The order of the pin configurations must coincide with what was
* defined in EK_TM4C129EXL.h
* NOTE: Pins not used for interrupts can be omitted from callbacks array to
* reduce memory usage (if placed at end of gpioPinConfigs array).
*/
GPIO_CallbackFxn gpioCallbackFunctions[] = {
NULL, /* EK_TM4C129EXL_USR_IMP1 */
NULL, /* EK_TM4C129EXL_USR_IMP2 */
NULL // Light test gpio on port D0
};
/* The device-specific GPIO_config structure */
const GPIOTiva_Config GPIOTiva_config = {
.pinConfigs = (GPIO_PinConfig *)gpioPinConfigs,
.callbacks = (GPIO_CallbackFxn *)gpioCallbackFunctions,
.numberOfPinConfigs = sizeof(gpioPinConfigs)/sizeof(GPIO_PinConfig),
.numberOfCallbacks = sizeof(gpioCallbackFunctions)/sizeof(GPIO_CallbackFxn),
.intPriority = (~0)
};
/*
* ======== EK_TM4C129EXL_initGPIO ========
*/
void EK_TM4C129EXL_initGPIO(void)
{
GPIO_init();
}
bit from the board header file
typedef enum EK_TM4C129EXL_GPIOName {
EK_TM4C129EXL_USR_IMP1 = 0,
EK_TM4C129EXL_USR_IMP2,
EK_TM4C129EXL_GPIO_D0,
EK_TM4C129EXL_D1,
EK_TM4C129EXL_D2,
EK_TM4C129EXL_GPIOCOUNT
} EK_TM4C129EXL_GPIOName;
and then finally the part in the main where I handle creating the interrupts and tying them to a function
GPIO_setCallback(EK_TM4C129EXL_USR_IMP1, gpioButtonFxn0); GPIO_enableInt(EK_TM4C129EXL_USR_IMP1); GPIO_setCallback(EK_TM4C129EXL_USR_IMP2, gpioButtonFxn1); GPIO_enableInt(EK_TM4C129EXL_USR_IMP2); GPIO_setCallback(EK_TM4C129EXL_GPIO_D0, gpioButtonFxn2); GPIO_enableInt(EK_TM4C129EXL_GPIO_D0);
