Andrea Vicari / Mbed OS TemperatureButtonFile

Samples temperature once per minute - Stores the time series on a file - Displays the time series on STDout, from the beginning of the file up to current time, when pressing the button

Dependencies:   BSP_B-L475E-IOT01

main.cpp@0:e53ff6cb04fd, 2018-12-06 (annotated)

Committer:
vicara
Date:
Thu Dec 06 17:49:10 2018 +0000
Revision:
0:e53ff6cb04fd
temperature once per minute

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vicara 0:e53ff6cb04fd 1 #include "mbed.h"
vicara 0:e53ff6cb04fd 2
vicara 0:e53ff6cb04fd 3 #include <stdio.h>
vicara 0:e53ff6cb04fd 4 #include <errno.h>
vicara 0:e53ff6cb04fd 5
vicara 0:e53ff6cb04fd 6 // Block devices
vicara 0:e53ff6cb04fd 7 #if COMPONENT_SPIF
vicara 0:e53ff6cb04fd 8 #include "SPIFBlockDevice.h"
vicara 0:e53ff6cb04fd 9 #endif
vicara 0:e53ff6cb04fd 10
vicara 0:e53ff6cb04fd 11 #if COMPONENT_DATAFLASH
vicara 0:e53ff6cb04fd 12 #include "DataFlashBlockDevice.h"
vicara 0:e53ff6cb04fd 13 #endif
vicara 0:e53ff6cb04fd 14
vicara 0:e53ff6cb04fd 15 #if COMPONENT_SD
vicara 0:e53ff6cb04fd 16 #include "SDBlockDevice.h"
vicara 0:e53ff6cb04fd 17 #endif
vicara 0:e53ff6cb04fd 18
vicara 0:e53ff6cb04fd 19 #include "HeapBlockDevice.h"
vicara 0:e53ff6cb04fd 20
vicara 0:e53ff6cb04fd 21 // File systems
vicara 0:e53ff6cb04fd 22 #include "LittleFileSystem.h"
vicara 0:e53ff6cb04fd 23 #include "FATFileSystem.h"
vicara 0:e53ff6cb04fd 24
vicara 0:e53ff6cb04fd 25 // Physical block device, can be any device that supports the BlockDevice API
vicara 0:e53ff6cb04fd 26 /*SPIFBlockDevice bd(
vicara 0:e53ff6cb04fd 27 MBED_CONF_SPIF_DRIVER_SPI_MOSI,
vicara 0:e53ff6cb04fd 28 MBED_CONF_SPIF_DRIVER_SPI_MISO,
vicara 0:e53ff6cb04fd 29 MBED_CONF_SPIF_DRIVER_SPI_CLK,
vicara 0:e53ff6cb04fd 30 MBED_CONF_SPIF_DRIVER_SPI_CS);*/
vicara 0:e53ff6cb04fd 31
vicara 0:e53ff6cb04fd 32 #define BLOCK_SIZE 512
vicara 0:e53ff6cb04fd 33 HeapBlockDevice bd(16384, BLOCK_SIZE);
vicara 0:e53ff6cb04fd 34 #include "stm32l475e_iot01_tsensor.h"
vicara 0:e53ff6cb04fd 35
vicara 0:e53ff6cb04fd 36
vicara 0:e53ff6cb04fd 37 // File system declaration
vicara 0:e53ff6cb04fd 38 LittleFileSystem fs("fs");
vicara 0:e53ff6cb04fd 39
vicara 0:e53ff6cb04fd 40 Ticker timeout_ticker;
vicara 0:e53ff6cb04fd 41 Thread t;
vicara 0:e53ff6cb04fd 42
vicara 0:e53ff6cb04fd 43 static FILE *f;
vicara 0:e53ff6cb04fd 44 volatile int seconds_passed = 0;
vicara 0:e53ff6cb04fd 45 EventQueue queue(32 * EVENTS_EVENT_SIZE);
vicara 0:e53ff6cb04fd 46
vicara 0:e53ff6cb04fd 47 void write_temperature_on_file() {
vicara 0:e53ff6cb04fd 48 float temperature = 0;
vicara 0:e53ff6cb04fd 49 temperature = BSP_TSENSOR_ReadTemp();
vicara 0:e53ff6cb04fd 50 fprintf(f, "%f\n", temperature);
vicara 0:e53ff6cb04fd 51 fflush(f);
vicara 0:e53ff6cb04fd 52 fflush(stdout);
vicara 0:e53ff6cb04fd 53 printf("New temperature stored in the file\n");
vicara 0:e53ff6cb04fd 54 }
vicara 0:e53ff6cb04fd 55
vicara 0:e53ff6cb04fd 56 void print_temperature_from_file() {
vicara 0:e53ff6cb04fd 57 printf("\n====== PRINTING TEMPERATURE RECORDED SO FAR ======\n");
vicara 0:e53ff6cb04fd 58 int order = 1;
vicara 0:e53ff6cb04fd 59 fflush(stdout);
vicara 0:e53ff6cb04fd 60 fflush(f);
vicara 0:e53ff6cb04fd 61 fseek(f, 0, SEEK_SET);
vicara 0:e53ff6cb04fd 62 float value;
vicara 0:e53ff6cb04fd 63 while (!feof(f)) {
vicara 0:e53ff6cb04fd 64 fscanf(f, "%f", &value);
vicara 0:e53ff6cb04fd 65 printf(" %d: %f\n", order, value);
vicara 0:e53ff6cb04fd 66 order++;
vicara 0:e53ff6cb04fd 67 }
vicara 0:e53ff6cb04fd 68 fflush(stdout);
vicara 0:e53ff6cb04fd 69 printf("\n");
vicara 0:e53ff6cb04fd 70 }
vicara 0:e53ff6cb04fd 71
vicara 0:e53ff6cb04fd 72 InterruptIn button(USER_BUTTON);
vicara 0:e53ff6cb04fd 73
vicara 0:e53ff6cb04fd 74 void toggle() {
vicara 0:e53ff6cb04fd 75 queue.call(print_temperature_from_file);
vicara 0:e53ff6cb04fd 76 }
vicara 0:e53ff6cb04fd 77
vicara 0:e53ff6cb04fd 78 void ticker_attach() {
vicara 0:e53ff6cb04fd 79 queue.call(write_temperature_on_file);
vicara 0:e53ff6cb04fd 80 }
vicara 0:e53ff6cb04fd 81
vicara 0:e53ff6cb04fd 82 int main(){
vicara 0:e53ff6cb04fd 83 t.start(callback(&queue, &EventQueue::dispatch_forever));
vicara 0:e53ff6cb04fd 84 BSP_TSENSOR_Init();
vicara 0:e53ff6cb04fd 85 button.rise(&toggle);
vicara 0:e53ff6cb04fd 86
vicara 0:e53ff6cb04fd 87 // Try to mount the filesystem
vicara 0:e53ff6cb04fd 88 printf("Mounting the filesystem... ");
vicara 0:e53ff6cb04fd 89 fflush(stdout);
vicara 0:e53ff6cb04fd 90 int err = fs.mount(&bd);
vicara 0:e53ff6cb04fd 91 printf("%s\n", (err ? "Fail :(" : "OK"));
vicara 0:e53ff6cb04fd 92 if (err) {
vicara 0:e53ff6cb04fd 93 // Reformat if we can't mount the filesystem
vicara 0:e53ff6cb04fd 94 // this should only happen on the first boot
vicara 0:e53ff6cb04fd 95 printf("No filesystem found, formatting... ");
vicara 0:e53ff6cb04fd 96 fflush(stdout);
vicara 0:e53ff6cb04fd 97 err = fs.reformat(&bd);
vicara 0:e53ff6cb04fd 98 printf("%s\n", (err ? "Fail :(" : "OK"));
vicara 0:e53ff6cb04fd 99 if (err) {
vicara 0:e53ff6cb04fd 100 error("error: %s (%d)\n", strerror(-err), err);
vicara 0:e53ff6cb04fd 101 }
vicara 0:e53ff6cb04fd 102 }
vicara 0:e53ff6cb04fd 103
vicara 0:e53ff6cb04fd 104 // Open the numbers file
vicara 0:e53ff6cb04fd 105 printf("Opening \"/fs/numbers.txt\"... ");
vicara 0:e53ff6cb04fd 106 fflush(stdout);
vicara 0:e53ff6cb04fd 107 f = fopen("/fs/numbers.txt", "r+");
vicara 0:e53ff6cb04fd 108 printf("%s\n", (!f ? "Fail :(" : "OK"));
vicara 0:e53ff6cb04fd 109 if (!f) {
vicara 0:e53ff6cb04fd 110 // Create the numbers file if it doesn't exist
vicara 0:e53ff6cb04fd 111 printf("No file found, creating a new file... ");
vicara 0:e53ff6cb04fd 112 fflush(stdout);
vicara 0:e53ff6cb04fd 113 f = fopen("/fs/numbers.txt", "w+");
vicara 0:e53ff6cb04fd 114 printf("%s\n", (!f ? "Fail :(" : "OK"));
vicara 0:e53ff6cb04fd 115 if (!f) {
vicara 0:e53ff6cb04fd 116 error("error: %s (%d)\n", strerror(errno), -errno);
vicara 0:e53ff6cb04fd 117 }
vicara 0:e53ff6cb04fd 118 }
vicara 0:e53ff6cb04fd 119
vicara 0:e53ff6cb04fd 120 timeout_ticker.attach(&ticker_attach, 60);
vicara 0:e53ff6cb04fd 121 }