Tauqir Hassan / Mbed 2 deprecated Bluetooth_Powered_Multimeter_Using_STM32F429_and_RTOS

A mbed RTOS based multimeter application that sends results to a phone over the Bluetooth module.

Dependencies:   LCD_DISCO_F429ZI mbed mbed-rtos BSP_DISCO_F429ZI

main.cpp@15:9c5fb6600570, 2021-01-17 (annotated)

Committer:
hunter64288
Date:
Sun Jan 17 22:37:48 2021 +0000
Revision:
15:9c5fb6600570
Parent:
14:526e0b503646
Child:
16:c90044414a96
create a 2nd function & 3rd thread; ; 2nd func would receive the voltage & current details from the 1st func via memory ; queue , 2nd & 3rd thread would print those details using semaphore.; ; 1st func would only receive the values using thread1.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:491820ee784d 1 #include "mbed.h"
mbed_official 11:0309bef74ba8 2 #include "rtos.h"
hunter64288 12:441ee5b1cf71 3 #include "LCD_DISCO_F429ZI.h"
hunter64288 12:441ee5b1cf71 4 //#include <AnalogIn.h>
hunter64288 12:441ee5b1cf71 5
hunter64288 15:9c5fb6600570 6 typedef struct {
hunter64288 15:9c5fb6600570 7 float voltage; /* AD result of measured voltage */
hunter64288 15:9c5fb6600570 8 float current; /* AD result of measured current */
hunter64288 15:9c5fb6600570 9 } message_t;
hunter64288 15:9c5fb6600570 10
hunter64288 15:9c5fb6600570 11 MemoryPool<message_t, 16> mpool;
hunter64288 15:9c5fb6600570 12 Queue<message_t, 16> queue;
hunter64288 15:9c5fb6600570 13
hunter64288 14:526e0b503646 14 Semaphore one_slot(1);
hunter64288 14:526e0b503646 15 //InterruptIn button(PA_0);
hunter64288 12:441ee5b1cf71 16
hunter64288 13:d21f6477ba19 17 Serial bluetooth(PA_9, PA_10); //Blueutooth Tx, Rx
hunter64288 14:526e0b503646 18 AnalogIn ain(PA_0); //Potentiometer Input
hunter64288 12:441ee5b1cf71 19
emilmont 1:491820ee784d 20 DigitalOut led1(LED1);
emilmont 1:491820ee784d 21 DigitalOut led2(LED2);
hunter64288 12:441ee5b1cf71 22
hunter64288 13:d21f6477ba19 23 LCD_DISCO_F429ZI lcd; //LCD Library
hunter64288 13:d21f6477ba19 24 Thread thread1; //threads
hunter64288 12:441ee5b1cf71 25 Thread thread2;
hunter64288 13:d21f6477ba19 26 Thread thread3;
hunter64288 13:d21f6477ba19 27 Thread thread4;
emilmont 1:491820ee784d 28
hunter64288 15:9c5fb6600570 29 void data_send(void const *name) {
hunter64288 12:441ee5b1cf71 30 lcd.Clear(LCD_COLOR_WHITE);
hunter64288 15:9c5fb6600570 31 lcd.DisplayStringAt(0, LINE(1), (uint8_t *)"Sending Data ... ", CENTER_MODE);
hunter64288 12:441ee5b1cf71 32
hunter64288 15:9c5fb6600570 33 //float samples; //float samples[10];
hunter64288 15:9c5fb6600570 34
hunter64288 14:526e0b503646 35
hunter64288 12:441ee5b1cf71 36 while(1) {
hunter64288 15:9c5fb6600570 37 led1 = !led1;
hunter64288 15:9c5fb6600570 38 //ain.set_reference_voltage(3.0);
hunter64288 15:9c5fb6600570 39 printf("%s has received the data, now sending it via Queue...\n\r", (const char *)name);
hunter64288 14:526e0b503646 40
hunter64288 15:9c5fb6600570 41 message_t *message = mpool.alloc();
hunter64288 15:9c5fb6600570 42 message->voltage = ain.read()*3;
hunter64288 15:9c5fb6600570 43 message->current = (ain.read()*3)/100;
hunter64288 15:9c5fb6600570 44 queue.put(message);
hunter64288 15:9c5fb6600570 45 wait(0.001f);
hunter64288 15:9c5fb6600570 46 Thread::wait(2000);
hunter64288 15:9c5fb6600570 47
hunter64288 15:9c5fb6600570 48 //samples = ain.read()*3;
hunter64288 15:9c5fb6600570 49 //wait(0.001f);
hunter64288 15:9c5fb6600570 50
hunter64288 15:9c5fb6600570 51 /*for(int i=0; i<10; i++) {
hunter64288 12:441ee5b1cf71 52 //ain.set_reference_voltage(3.0);
hunter64288 12:441ee5b1cf71 53 samples[i] = ain.read()*3;
hunter64288 12:441ee5b1cf71 54 wait(0.001f);
hunter64288 15:9c5fb6600570 55 }*/
hunter64288 12:441ee5b1cf71 56
hunter64288 15:9c5fb6600570 57 //bluetooth.printf("Voltage: %f\n", samples);
hunter64288 15:9c5fb6600570 58
hunter64288 15:9c5fb6600570 59 /*bluetooth.printf("Results:\n");
hunter64288 12:441ee5b1cf71 60 for(int i=0; i<10; i++) {
hunter64288 12:441ee5b1cf71 61 bluetooth.printf("%d = , %f\n", i, samples[i]);
hunter64288 15:9c5fb6600570 62 }*/
hunter64288 15:9c5fb6600570 63
hunter64288 12:441ee5b1cf71 64 }
hunter64288 12:441ee5b1cf71 65 }
hunter64288 13:d21f6477ba19 66
hunter64288 15:9c5fb6600570 67 void data_receive(void const *name) {
hunter64288 15:9c5fb6600570 68 lcd.DisplayStringAt(0, LINE(2), (uint8_t *)"Data Received !!", CENTER_MODE);
hunter64288 15:9c5fb6600570 69
hunter64288 15:9c5fb6600570 70
hunter64288 15:9c5fb6600570 71
hunter64288 12:441ee5b1cf71 72 while(true) {
hunter64288 12:441ee5b1cf71 73 //float i=0;
hunter64288 14:526e0b503646 74 led2 = !led2;
hunter64288 15:9c5fb6600570 75 one_slot.wait();
hunter64288 15:9c5fb6600570 76 printf("%s has acquired the semaphore & received the data\n\r", (const char *)name);
hunter64288 15:9c5fb6600570 77 printf("Results are displayed by %s\n\r", (const char *)name);
hunter64288 12:441ee5b1cf71 78 Thread::wait(1000);
hunter64288 15:9c5fb6600570 79
hunter64288 15:9c5fb6600570 80 osEvent evt = queue.get();
hunter64288 15:9c5fb6600570 81 if (evt.status == osEventMessage) {
hunter64288 15:9c5fb6600570 82 message_t *message = (message_t*)evt.value.p;
hunter64288 15:9c5fb6600570 83 printf("\nVoltage: %.2f V\n\r" , message->voltage);
hunter64288 15:9c5fb6600570 84 printf("Current: %.2f A\n\r" , message->current);
hunter64288 15:9c5fb6600570 85 mpool.free(message);}
hunter64288 15:9c5fb6600570 86
hunter64288 15:9c5fb6600570 87 one_slot.release();
hunter64288 15:9c5fb6600570 88 printf("%s releases semaphore\r", (const char *)name);
hunter64288 15:9c5fb6600570 89 printf("\n-----------------------\n");
hunter64288 15:9c5fb6600570 90 Thread::wait(1000);
hunter64288 15:9c5fb6600570 91 // bluetooth.printf("Hello World !\r\n");
hunter64288 15:9c5fb6600570 92 //bluetooth.printf("This program runs since %f seconds.\r\n", i++);
hunter64288 15:9c5fb6600570 93
hunter64288 13:d21f6477ba19 94 }
hunter64288 15:9c5fb6600570 95
hunter64288 15:9c5fb6600570 96 }
hunter64288 12:441ee5b1cf71 97
hunter64288 14:526e0b503646 98 /*void btn_int(){
hunter64288 14:526e0b503646 99
hunter64288 14:526e0b503646 100 one_slot.release();
hunter64288 14:526e0b503646 101 }*/
hunter64288 14:526e0b503646 102
hunter64288 14:526e0b503646 103 /*void semaphore_test(void const *name)
hunter64288 13:d21f6477ba19 104 {
hunter64288 13:d21f6477ba19 105 while (true) {
hunter64288 14:526e0b503646 106 one_slot.wait();
hunter64288 14:526e0b503646 107
hunter64288 14:526e0b503646 108 printf("%s acquires semaphore\n\r", (const char *)name);
hunter64288 14:526e0b503646 109 Thread::wait(1000);
hunter64288 13:d21f6477ba19 110 one_slot.release();
hunter64288 14:526e0b503646 111 printf("%s releases semaphore\n\r", (const char *)name);
hunter64288 13:d21f6477ba19 112 }
hunter64288 14:526e0b503646 113 }*/
emilmont 1:491820ee784d 114
emilmont 1:491820ee784d 115 int main() {
hunter64288 12:441ee5b1cf71 116 printf("We are in main.\n\r");
hunter64288 12:441ee5b1cf71 117
hunter64288 12:441ee5b1cf71 118 thread1.set_priority(osPriorityHigh);
hunter64288 15:9c5fb6600570 119 thread2.set_priority(osPriorityLow);
hunter64288 15:9c5fb6600570 120 thread3.set_priority(osPriorityLow);
hunter64288 14:526e0b503646 121 //thread4.set_priority(osPriorityLow);
hunter64288 12:441ee5b1cf71 122
hunter64288 15:9c5fb6600570 123 thread1.start(data_send, (void *)"Thread 1"); // Starting the processes
hunter64288 15:9c5fb6600570 124 thread2.start(data_receive, (void *)"Thread 2");
emilmont 1:491820ee784d 125
hunter64288 14:526e0b503646 126 //button.rise(&btn_int);
hunter64288 15:9c5fb6600570 127 thread3.start(data_receive, (void *)"Thread 3");
hunter64288 14:526e0b503646 128 //thread4.start(semaphore_test, (void *)"Thread 4");
hunter64288 13:d21f6477ba19 129
hunter64288 12:441ee5b1cf71 130 thread1.join();
hunter64288 12:441ee5b1cf71 131 thread2.join();
hunter64288 13:d21f6477ba19 132 thread3.join();
hunter64288 13:d21f6477ba19 133 thread4.join();
hunter64288 12:441ee5b1cf71 134
hunter64288 12:441ee5b1cf71 135 //wait for threads to complete
hunter64288 12:441ee5b1cf71 136 printf("The end of main.\n\r");
emilmont 1:491820ee784d 137 }
hunter64288 12:441ee5b1cf71 138
hunter64288 12:441ee5b1cf71 139