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This is the hello world program for the interrupt availability in the TM4C1294NCPDT microcontroller
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| #define GPIO_PORT_CGC_R (*((volatile unsigned long *) 0x400FE608)) | |
| #define GPIO_PORTA_DIR_R (*((volatile unsigned long *) 0x40058400)) | |
| #define GPIO_PORTA_IS_R (*((volatile unsigned long *) 0x40058404)) /* Interrupt sense */ | |
| #define GPIO_PORTA_IBE_R (*((volatile unsigned long *) 0x40058408)) /* Interrupt both edges */ | |
| #define GPIO_PORTA_IEV_R (*((volatile unsigned long *) 0x4005840C)) /* Interrupt event */ | |
| #define GPIO_PORTA_IM_R (*((volatile unsigned long *) 0x40058410)) /* Interrupt mask */ | |
| #define GPIO_PORTA_RIS_R (*((volatile unsigned long *) 0x40058414)) /* Raw interrupt status */ | |
| #define GPIO_PORTA_MIS_R (*((volatile unsigned long *) 0x40058418)) /* Masked interrupt status */ | |
| #define GPIO_PORTA_IC_R (*((volatile unsigned long *) 0x4005841C)) /* Interrupt clear */ | |
| #define GPIO_PORTA_AFSEL_R (*((volatile unsigned long *) 0x40058420)) | |
| #define GPIO_PORTA_DEN_R (*((volatile unsigned long *) 0x4005851C)) | |
| #define GPIO_PORTA_DATA_R (*((volatile unsigned long *) 0x40058080)) /* NOTE: Only PA5 can be written */ | |
| #define NVIC_EN0_R (*((volatile unsigned long *) 0xE000E100)) /* Write to enable interrupt */ | |
| #define NVIC_DIS0_R (*((volatile unsigned long *) 0xE000E180)) /* Write to disable interrupt */ | |
| #define NVIC_PEND0_R (*((volatile unsigned long *) 0xE000E200)) /* Set pending interrupt */ | |
| #define NVIC_UNPEND0_R (*((volatile unsigned long *) 0xE000E280)) /* Clear pending interrupt */ | |
| #define NVIC_ACTIVE0_R (*((volatile unsigned long *) 0xE000E300)) | |
| #define NVIC_PRI0_R (*((volatile unsigned long *) 0xE000E400)) | |
| #define SCB_APINT_R (*((volatile unsigned long *) 0xE000ED0C)) | |
| void GPIOPortA_Handler(void) | |
| { | |
| GPIO_PORTA_DATA_R ^= 0x20; /* Toggle the LED attached at PA5 */ | |
| GPIO_PORTA_IC_R |= 0x10; /* Acknowledge the interrupt */ | |
| } | |
| int main(void) | |
| { | |
| GPIO_PORT_CGC_R |= 0x01; /* Enable PORTA module */ | |
| GPIO_PORTA_DIR_R &= ~0x10; /* PA4 is an input pin */ | |
| GPIO_PORTA_AFSEL_R &= ~0x10; /* PA4 is not a special function pin */ | |
| GPIO_PORTA_DEN_R |= 0x10; /* PA4 is a digital pin */ | |
| GPIO_PORTA_DIR_R |= 0x20; /* PA5 is an output pin */ | |
| GPIO_PORTA_AFSEL_R &= ~0x20; /* PA5 is not a special function pin */ | |
| GPIO_PORTA_DEN_R |= 0x20; /* PA5 is a digital pin */ | |
| GPIO_PORTA_IS_R &= ~0x10; /* PA4 is edge sensitive */ | |
| GPIO_PORTA_IBE_R &= ~0x10; /* PA4 does not trigger on both edges (see GPIOIEV register) */ | |
| GPIO_PORTA_IEV_R |= 0x10; /* PA4 triggers an interrupt on the rising edge */ | |
| GPIO_PORTA_IC_R |= 0x10; /* Clear a pending interrupt for PA4. This is good practice */ | |
| GPIO_PORTA_IM_R |= 0x10; /* Interrupt triggered by PA4 are sent to the interrupt controller */ | |
| SCB_APINT_R |= 0x05FA0400; /* 3 bit group priority and no subpriority */ | |
| NVIC_PRI0_R |= (0x01 << 5); /* Interrupts triggered by PA4 have the priority #1 */ | |
| NVIC_EN0_R |= 0x01; /* Enable interrupts for the GPIO PORTA module */ | |
| while(1) {} | |
| return 0; | |
| } | |
| /* PA4 is input */ | |
| /* PA5 is output */ |
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