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
- Committer:
- vicara
- Date:
- 2018-12-06
- Revision:
- 0:e53ff6cb04fd
File content as of revision 0:e53ff6cb04fd:
#include "mbed.h" #include <stdio.h> #include <errno.h> // Block devices #if COMPONENT_SPIF #include "SPIFBlockDevice.h" #endif #if COMPONENT_DATAFLASH #include "DataFlashBlockDevice.h" #endif #if COMPONENT_SD #include "SDBlockDevice.h" #endif #include "HeapBlockDevice.h" // File systems #include "LittleFileSystem.h" #include "FATFileSystem.h" // Physical block device, can be any device that supports the BlockDevice API /*SPIFBlockDevice bd( MBED_CONF_SPIF_DRIVER_SPI_MOSI, MBED_CONF_SPIF_DRIVER_SPI_MISO, MBED_CONF_SPIF_DRIVER_SPI_CLK, MBED_CONF_SPIF_DRIVER_SPI_CS);*/ #define BLOCK_SIZE 512 HeapBlockDevice bd(16384, BLOCK_SIZE); #include "stm32l475e_iot01_tsensor.h" // File system declaration LittleFileSystem fs("fs"); Ticker timeout_ticker; Thread t; static FILE *f; volatile int seconds_passed = 0; EventQueue queue(32 * EVENTS_EVENT_SIZE); void write_temperature_on_file() { float temperature = 0; temperature = BSP_TSENSOR_ReadTemp(); fprintf(f, "%f\n", temperature); fflush(f); fflush(stdout); printf("New temperature stored in the file\n"); } void print_temperature_from_file() { printf("\n====== PRINTING TEMPERATURE RECORDED SO FAR ======\n"); int order = 1; fflush(stdout); fflush(f); fseek(f, 0, SEEK_SET); float value; while (!feof(f)) { fscanf(f, "%f", &value); printf(" %d: %f\n", order, value); order++; } fflush(stdout); printf("\n"); } InterruptIn button(USER_BUTTON); void toggle() { queue.call(print_temperature_from_file); } void ticker_attach() { queue.call(write_temperature_on_file); } int main(){ t.start(callback(&queue, &EventQueue::dispatch_forever)); BSP_TSENSOR_Init(); button.rise(&toggle); // Try to mount the filesystem printf("Mounting the filesystem... "); fflush(stdout); int err = fs.mount(&bd); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { // Reformat if we can't mount the filesystem // this should only happen on the first boot printf("No filesystem found, formatting... "); fflush(stdout); err = fs.reformat(&bd); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { error("error: %s (%d)\n", strerror(-err), err); } } // Open the numbers file printf("Opening \"/fs/numbers.txt\"... "); fflush(stdout); f = fopen("/fs/numbers.txt", "r+"); printf("%s\n", (!f ? "Fail :(" : "OK")); if (!f) { // Create the numbers file if it doesn't exist printf("No file found, creating a new file... "); fflush(stdout); f = fopen("/fs/numbers.txt", "w+"); printf("%s\n", (!f ? "Fail :(" : "OK")); if (!f) { error("error: %s (%d)\n", strerror(errno), -errno); } } timeout_ticker.attach(&ticker_attach, 60); }