project1P2.c

// This is the starter file for CECS 447 Project 1 Part 2
// By Dr. Min He
// September 10, 2022
// Port B bits 5-0 outputs to the 6-bit DAC
// Port D bits 3-0 inputs from piano keys: CDEF:doe ray mi fa,negative logic connections.
// Port F is onboard LaunchPad switches and LED
// SysTick ISR: PF3 is used to implement heartbeat

// Header files
#include "tm4c123gh6pm.h"
#include "Sound.h"
#include "ButtonLed.h"

// 2. Declarations Section

// Function Prototypes
extern void DisableInterrupts(void);
extern void EnableInterrupts(void);
extern void WaitForInterrupt(void);

// 3. Subroutines Section
// MAIN: Mandatory for a C Program to be executable
int main(void)
{
	DisableInterrupts();
	DAC_Init();		  // Port B
	ButtonLed_Init(); // Port F
	PianoKeys_Init(); // Port D and A
	EnableInterrupts();

	while (1)
	{
		switch (get_current_mode())
		{
		case PIANO:
			WaitForInterrupt();
			break;
		case AUTO_PLAY:
			play_a_song();
			break;
		default:
			break;
		}
	}
}