71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include "tm4c123gh6pm.h"
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void GPIO_PORT_F_init(void)
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{
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SYSCTL_RCGC2_R |= 0x00000020; // ENABLE CLOCK TO GPIOF
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GPIO_PORTF_LOCK_R = 0x4C4F434B; // UNLOCK COMMIT REGISTER
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GPIO_PORTF_CR_R = 0x1F; // MAKE PORTF0 CONFIGURABLE
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GPIO_PORTF_DEN_R = 0x1F; // SET PORTF DIGITAL ENABLE
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GPIO_PORTF_DIR_R = 0x0E; // SET PF0, PF4 as input and PF1, PF2 and PF3 as output
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GPIO_PORTF_PUR_R = 0x11; // PORTF PF0 and PF4 IS PULLED UP
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NVIC_EN0_R |= 1 << 30;
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GPIO_PORTF_IS_R = 0x00; // Make it edge-sensitive
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GPIO_PORTF_IBE_R = 0x00; // Trigger on one edge
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GPIO_PORTF_IEV_R = 0x00; // Falling edge event
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GPIO_PORTF_IM_R |= 0x11; // Unmask interrupts for PF0 and PF4
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}
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void UART1_WRITE(char data)
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{
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while (UART1_FR_R & 0x20); // Wait until TX FIFO is not full
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UART1_DR_R = data; // Write data to UART data register
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}
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char UART1_READ(void)
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{
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while (UART1_FR_R & 0x10); // Wait until RX FIFO is not empty
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return (char)UART1_DR_R; // Return received data
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}
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void GPIOF_interruptHandler(void) // Interrupt handler for GPIO Port F
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{
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//delay(200000); // Debounce delay
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// Check PF4 (Switch 2)
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if (GPIO_PORTF_RIS_R & 0x10) // Check if PF4 caused the interrupt
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{
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//GPIO_PORTF_DATA_R |= 0x02; // Toggle RED LED (PF1)
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//delay(500000);
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UART1_WRITE(0xF0);
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STATUS_LED(UART1_READ());
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//GPIO_PORTF_DATA_R = 0x00; // Toggle RED LED (PF1)
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GPIO_PORTF_ICR_R = 0x10; // Clear interrupt flag for PF4
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}
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// Check PF0 (Switch 1)
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if (GPIO_PORTF_RIS_R & 0x01) // Check if PF0 caused the interrupt
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{
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//GPIO_PORTF_DATA_R |= 0x04; // Toggle RED LED (PF1)
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//delay(500000);
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UART1_WRITE(0xAA);
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//GPIO_PORTF_DATA_R = 0x00;
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STATUS_LED(UART1_READ());
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GPIO_PORTF_ICR_R = 0x01; // Clear interrupt flag for PF0
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}
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}
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int main(void) // MAIN FUNCTION
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{
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GPIO_PORT_F_init(); // GPIO INITIALISATION FUNCTION
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while (1)
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{
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}
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}
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