Group21_Lab06/Group21_Lab06_Task2/main.c

20 lines
1.0 KiB
C

#include <stdint.h>
#include <stdbool.h>
#include "tm4c123gh6pm.h"
// Global Variables
volatile int duty = 50; // Initial duty cycle
volatile bool buttonPressed = false; // Track button state
volatile uint32_t pressDuration = 0; // Track how long the button is pressed
const long int PWM_PERIOD = 1000000; // Period for 100kHz in microseconds (10ms)
#define STCTRL *((volatile uint32_t *) 0xE000E010) // Control and status
#define STRELOAD *((volatile uint32_t *) 0xE000E014) // Reload value
#define STCURRENT *((volatile uint32_t *) 0xE000E018) // Current value
#define COUNT_FLAG (1 << 16) // Bit 16 of CSR automatically set to 1
#define ENABLE (1 << 0) // Bit 0 of CSR to enable the timer
#define CLKINT (1 << 2) // Bit 2 of CSR to specify CPU clock
#define CLOCK_HZ 16000000 // Clock frequency of EK-TM4C123GXL
#define INTEN (1 << 1) // Bit 1 of CSR to enable interrupt
#define SYSTICK_RELOAD_VALUE(us) ((CLOCK_HZ / 1000000) * (us) - 1) // SysTick reload value in microseconds based on clock frequency