Sound.h

// Sound.h
// This module contains the SysTick ISR that plays sound
// Runs on TM4C123
// Program written by: Devin Chaky
// Date Created: 1/2/23 
// Last Modified: 2/20/23
// Lab number: 6
// Hardware connections
// Input switches on PA5-2, 6-bit DAC output pins PB5-0

#ifndef SOUND_H
#define SOUND_H
#include <stdint.h>
// Header files contain the prototypes for public functions
// this file explains what the module does

// **************Sound_Init*********************
// Initialize digital outputs and SysTick timer
// Called once, with sound/interrupts initially off
// Input: none
// Output: none
void Sound_Init(void);


// **************Sound_Start*********************
// Start sound output, and set Systick interrupt period 
// Sound continues until Sound_Start called again, or Sound_Off is called
// This function returns right away and sound is produced using a periodic interrupt
// Input: interrupt period
//           Units of period to be determined by YOU
//           Maximum period to be determined by YOU
//           Minimum period to be determined by YOU
//         if period equals zero, disable sound output
// Output: none
void Sound_Start(uint32_t period);

// **************Sound_Voice*********************
// Change voice
// ECE319K optional
// Input: voice specifies which waveform to play
//           Pointer to wave table
// Output: none
void Sound_Voice(const uint8_t *voice);

// **************Sound_Off*********************
// stop outputing to DAC
// Output: none
void Sound_Off(void);

// **************Sound_GetVoice*********************
// Read the current voice
// ECE319K optional
// Input: 
// Output: voice specifies which waveform to play
//           Pointer to current wave table
const uint8_t *Sound_GetVoice(void);




#endif