Code for PartIIA. More...

#include <arduinoFFT.h>
#include <Arduino_FreeRTOS.h>
#include "queue.h"

Macros
#define	LED_BLINK 49
	pin for the external LED to blink More...

#define	LED_ON 100
	time in miliseconds for the LED to stay on More...

#define	LED_OFF 200
	time in miliseconds for the LED to stay off More...

#define	Note_D4 3400
	294Hz frequeny to play More...

#define	Note_E4 3038
	329Hz frequency to play More...

#define	Note_C4 3830
	261Hz frequency to play More...

#define	Note_C3 7692
	130Hz frequency to play More...

#define	Note_G3 5102
	196Hz frequencys to play More...

#define	Note_R 0
	slience frequency More...

#define	SOUND_DUR 500
	define the duration for each note/sound the speaker play More...

#define	SLEEP_DUR 3000UL
	define sleep time More...

#define	REPEAT_TIMES 3
	Numbers of times to repeat the tune. More...

#define	RAND_SIZE 128
	Size of the random array size. More...

#define	TIME_SIZE 5
	Size of the size of the time array. More...

#define	STACK_SMALL 128
	Size of the stack size 1. More...

#define	RAND_MIN -32000
	Minimum number for creating a random number. More...

#define	RAND_MAX 32000
	Maximum number for creating a random number. More...

Functions
void	TaskBlink (void *pvParameters)
	blink an external LED More...

void	TaskTheme (void *pvParameters)
	Play "Close Encounters" on an external speaker Three times. More...

void	RT3p0 (void *pvParameters)
	Function to run task RT3p0. More...

void	RT3p1 (void *pvParameters)
	Function to run task RT3p1. More...

void	RT4 (void *pvParameters)
	Function to run task RT-4. More...

void	setup ()
	Funciton to setup RtOS tasks. More...

void	loop ()
	loop though different funcitons, not in use for this lab More...

Variables
int	melody [] = { Note_D4, Note_R, Note_E4, Note_R, Note_C4, Note_R, Note_C3, Note_R, Note_G3, Note_R }
	the "Close Encounter" tune going to play More...

int	tuneLen = sizeof(melody) / 2
	define tune array length More...

arduinoFFT	FFT = arduinoFFT()
	Create FFT object. More...

const double	signalFrequency = 1000
	frequency (Hz) of the FFT signal More...

const double	samplingFrequency = 5000
	frequency (Hz) of the FFT sample More...

const uint16_t	samples = RAND_SIZE
	numbers of samples for the FFT More...

double	vReal [samples]
	sample arrays real part More...

double	vImag [samples]
	sample arrays imaginary part More...

double	rand_array [RAND_SIZE]
	random array RT-3 sent to More...

double	store_rand [RAND_SIZE]
	random array RT-4 received from More...

unsigned long	time_array [TIME_SIZE]
	time array that each FFT takes to compute that RT-4 will sent back More...

unsigned long	store_time [TIME_SIZE]
	time array that each FFT takes to compute that RT-3 will receive once RT-4 sent back More...

unsigned long	start_time
	time indicator that the FFTs started to compute More...

unsigned long	end_time
	time indicator that the FFTs completed to compute More...

QueueHandle_t	xQueue1
	FreeRTOS Queue for RT3p0. More...

QueueHandle_t	xQueue2
	FreeRTOS Queue shared between RT-3 and 4. More...

unsigned long	result
	done result for RT3p1 More...

boolean	done
	done signal for RT4 More...

Detailed Description

Code for PartIIA.

Author: Fusco Li, Eric Yu

Date: 9-June-2022

External LED at pin 49 flashes on for 100ms and off for 200ms; speaker at pin 6 plays the theme of “Close Encounters” for three times with 1.5s delay between each play; serial monitor displays time it takes to compute the FFT function for 5 times.

Macro Definition Documentation

◆ LED_BLINK

#define LED_BLINK 49

pin for the external LED to blink

◆ LED_OFF

#define LED_OFF 200

time in miliseconds for the LED to stay off

◆ LED_ON

#define LED_ON 100

time in miliseconds for the LED to stay on

◆ Note_C3

#define Note_C3 7692

130Hz frequency to play

◆ Note_C4

#define Note_C4 3830

261Hz frequency to play

◆ Note_D4

#define Note_D4 3400

294Hz frequeny to play

◆ Note_E4

#define Note_E4 3038

329Hz frequency to play

◆ Note_G3

#define Note_G3 5102

196Hz frequencys to play

◆ Note_R

#define Note_R 0

slience frequency

◆ RAND_MAX

#define RAND_MAX 32000

Maximum number for creating a random number.

◆ RAND_MIN

#define RAND_MIN -32000

Minimum number for creating a random number.

◆ RAND_SIZE

#define RAND_SIZE 128

Size of the random array size.

◆ REPEAT_TIMES

#define REPEAT_TIMES 3

Numbers of times to repeat the tune.

◆ SLEEP_DUR

#define SLEEP_DUR 3000UL

define sleep time

◆ SOUND_DUR

#define SOUND_DUR 500

define the duration for each note/sound the speaker play

◆ STACK_SMALL

#define STACK_SMALL 128

Size of the stack size 1.

◆ TIME_SIZE

#define TIME_SIZE 5

Size of the size of the time array.

Function Documentation

◆ loop()

void loop ( )

loop though different funcitons, not in use for this lab

This program uses RTOS so this function is not in use. Things are done in Tasks.

◆ RT3p0()

void RT3p0 ( void * pvParameters )

Function to run task RT3p0.

This task would create a RAND_SIZE number random array in rand_array. Then it will use FreeRTOS xQueueCreate function. to create a queue on xQueue1. It then uses FreeRTOS's xTaskCreate() function to create task RT3p1 's function and then stop itself using vTaskSuspend

Parameters

pvParameters parameters that FreeRTOS can pass in

◆ RT3p1()

void RT3p1 ( void * pvParameters )

Function to run task RT3p1.

This task would sent back rand_array pointer to the data into xQueue1 using the FreeRTOS xQueueSendToBack() function. in a loop that repeats TIME_SIZE times then it will use xQueueReceive() to receive store_time pointer with portMAX_DELAY delay to back and wait. Then it use serial to print out the the time to compute FFT in another loop that repeats TIME_SIZE times

Parameters

pvParameters parameters that FreeRTOS can pass in

See also: RT4

◆ RT4()

void RT4 ( void * pvParameters )

Function to run task RT-4.

This task first stores the time it started each loop in start_time . It will recieve the store_rand pointer from xQueue1 using the xQueueReceive() function. It then loop samples of times to fill the vReal and vImag part of the FFT and compute the ramdom buffer. It recorde another time mark end_time and using the difference between start_time and end_time to compute amount of time it took to compute th FFT and store this value into duration . It put each of such variable into time_array and report its pointer back to xQueue2 using xQueueSendToBack()

Parameters

pvParameters parameters that FreeRTOS can pass in

See also: RT3p1; https://raw.githubusercontent.com/kosme/arduinoFFT/master/Examples/FFT_01/FFT_01.ino

◆ setup()

void setup ( )

Funciton to setup RtOS tasks.

Setup serial communication method and creat RTOS tasks. Set the priority of each task as well as its size.

◆ TaskBlink()

void TaskBlink ( void * pvParameters )

blink an external LED

First it setup the LED in this function. Then in an infinite loop, it is going to turn LED on using digitalWrite() function and wait for LED_ON miliseconds using vTaskDelay() . Similarly then it uses the same functions to turn it off for LED_OFF miliseconds

Parameters

pvParameters parameters that FreeRTOS can pass in

◆ TaskTheme()

void TaskTheme ( void * pvParameters )

Play "Close Encounters" on an external speaker Three times.

First it setup the registers and timers for the speaker. Then loop thought the task three times. Within the loop there is another for loop that increment through melody array to use the correct note freqencies to play sounds. Use vTaskDelay to wait in between notes and songs. Use vTaskSuspend to stop the task.

Parameters

pvParameters parameters that FreeRTOS can pass in

Variable Documentation

◆ done

boolean done

done signal for RT4

◆ end_time

unsigned long end_time

time indicator that the FFTs completed to compute

◆ FFT

arduinoFFT FFT = arduinoFFT()

Create FFT object.

◆ melody

int melody[] = { Note_D4, Note_R, Note_E4, Note_R, Note_C4, Note_R, Note_C3, Note_R, Note_G3, Note_R }

the "Close Encounter" tune going to play

◆ rand_array

double rand_array[RAND_SIZE]

random array RT-3 sent to

◆ result

unsigned long result

done result for RT3p1

◆ samples

const uint16_t samples = RAND_SIZE

numbers of samples for the FFT

◆ samplingFrequency

const double samplingFrequency = 5000

frequency (Hz) of the FFT sample

◆ signalFrequency

const double signalFrequency = 1000

frequency (Hz) of the FFT signal

◆ start_time

unsigned long start_time

time indicator that the FFTs started to compute

◆ store_rand

double store_rand[RAND_SIZE]

random array RT-4 received from

◆ store_time

unsigned long store_time[TIME_SIZE]

time array that each FFT takes to compute that RT-3 will receive once RT-4 sent back

◆ time_array

unsigned long time_array[TIME_SIZE]

time array that each FFT takes to compute that RT-4 will sent back

◆ tuneLen

int tuneLen = sizeof(melody) / 2

define tune array length

◆ vImag

double vImag[samples]

sample arrays imaginary part

◆ vReal

double vReal[samples]

sample arrays real part

◆ xQueue1

QueueHandle_t xQueue1

FreeRTOS Queue for RT3p0.

◆ xQueue2

QueueHandle_t xQueue2

FreeRTOS Queue shared between RT-3 and 4.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ LED_BLINK

◆ LED_OFF

◆ LED_ON

◆ Note_C3

◆ Note_C4

◆ Note_D4

◆ Note_E4

◆ Note_G3

◆ Note_R

◆ RAND_MAX

◆ RAND_MIN

◆ RAND_SIZE

◆ REPEAT_TIMES

◆ SLEEP_DUR

◆ SOUND_DUR

◆ STACK_SMALL

◆ TIME_SIZE

Function Documentation

◆ loop()

◆ RT3p0()

◆ RT3p1()

◆ RT4()

◆ setup()

◆ TaskBlink()

◆ TaskTheme()

Variable Documentation

◆ done

◆ end_time

◆ FFT

◆ melody

◆ rand_array

◆ result

◆ samples

◆ samplingFrequency

◆ signalFrequency

◆ start_time

◆ store_rand

◆ store_time

◆ time_array

◆ tuneLen

◆ vImag

◆ vReal

◆ xQueue1

◆ xQueue2