trevorb98/CE2812-Workspace
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

lab 5 final

Browse Source
This commit is contained in:
tbarnes98
2022-01-31 01:11:41 -06:00
parent f409bfa319
commit 8817dae579
3 changed files with 204 additions and 296 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
labW5barnestr/Src/piezoSpeaker.c
View File

@@ -1,9 +1,9 @@
/**
* @file piezoSpeaker.c
* @author Trevor Barnes
* @brief
* @brief Provides funtionality for initializing, playing notes, and playing songs on the piezo speaker.
* @version 0.1
* @date 2022-01-19
* @date 2022-01-12
*
* @copyright Copyright (c) 2022
*
@@ -16,62 +16,52 @@
void piezo_init(){
//enable GPIOB and Timer 3 RCC
// GPIOB/Timer3 enable in RCC
*RCC_AHB1ENR |= (1<<GPIOBEN);
*RCC_APB1ENR |= (1<<TIM3_EN);
//set GPIO B to alternate function (0b10<<9)
//clears the two bits and then set it
// Set to "alternate function" mode
*GPIOB_MODER = (*GPIOB_MODER&~(0b11<<8)) | (PB4_AF_V<<8);
//set alternate function low register to TIM3
// Set AF to low
*GPIOB_AFRL |= (1<<AFRL_TIM3_CH1_EN);
//Configure capture/compare mode register configuration
//to enable preload and set to pwm
// Set to output capture
*TIM3_CCMR1 |= OC1M_PWM2;
*TIM3_CCMR1 |= (1<<OC1PE);
//Configure CCER to enable timer 3 as output capture
*TIM3_CCER |= CCER_CC1E;
//Configure control register to enable preload
// Enable Preload
*TIM3_CR1 |= (1<<CR_ARPE_EN);
}
void play_note(Note noteToPlay) {
//void play_note(double playFrequency, double playDuration) {
*TIM3_PSC = 15;
//Divisor controls pitch
*TIM3_ARR = (pitchDivisor)/(noteToPlay.noteFrequency/100);
// Pitch divisor to scale with timer
*TIM3_ARR = (pitchDivisor)/(noteToPlay.noteFrequency);
//Loudness (Smaller dividend = louder sound)
double freq = (noteToPlay.noteFrequency/100)/10;
// Volume (Smaller dividend = louder sound)
unsigned int freq = (noteToPlay.noteFrequency/10);
//clear ccr1
// Clear CCR
*TIM3_CCR1 = (*TIM3_CCR1&~(0xFFFF));
*TIM3_CCR1 = freq;
//set EGR (accept only a byte of info so steps)
// Set EGR
*TIM3_EGR |= EGR_UG;
//~~~Plays the notes
//Enables enable bit control register
// Playing note
// Enables timer
*TIM3_CR1 |= 1;
//delay that leaves the speaker on for desired amount of time
// Delay for duration of note
delay_1ms(noteToPlay.noteDuration);
//Disables enable bit
// Disables timer
*TIM3_CR1 &= ~1;
}
void play_song(Note *songToPlay){
int i = 0;
// double freq = songToPlay[i].noteFrequency;
// Note newNote = {songToPlay[i].noteFrequency, songToPlay[i].noteDuration };
while(songToPlay[i].noteFrequency != T) {
// Iterate through song and play each note till "END" value
while(songToPlay[i].noteFrequency != END) {
play_note(songToPlay[i]);
i++;
}