File content as of revision 0:2ce95bf1286f:

#include "mbed.h"

#include "stm32l475e_iot01_accelero.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);

// File system declaration
LittleFileSystem fs("fs");

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);

Ticker timeout_ticker;
Thread t;

static FILE *f;
volatile int seconds_passed = 0;
EventQueue queue(32 * EVENTS_EVENT_SIZE);

InterruptIn button(USER_BUTTON);
int16_t pDataXYZ[3] = {0};

void toggle_led(int led1_status, int led2_status, int led3_status){
    led1 = led1_status;
    led2 = led2_status;
    led3 = led3_status;
}

void write_positions_on_file() {
    int16_t pDataXYZ[3] = {0};
    BSP_ACCELERO_AccGetXYZ(pDataXYZ);
    if ((pDataXYZ[0] < -950  && pDataXYZ[0] > -1030) || (pDataXYZ[0] < 1030 && pDataXYZ[0] > 950)) {
            fprintf(f, "%d\n", 0);
        } else if ((pDataXYZ[1] < 1030 && pDataXYZ[1] > 950) || (pDataXYZ[1] < -950 && pDataXYZ[1] > -1030)) {
            fprintf(f, "%d\n", 1);
        } else if ((pDataXYZ[2] < 1030 && pDataXYZ[2] > 950) || (pDataXYZ[2] < -950 && pDataXYZ[2] > -1030)) {
             fprintf(f, "%d\n", 2);
        } else {
             fprintf(f, "%d\n", -1);
        }
    fflush(f);
    fflush(stdout);
}

void toggle_led_based_on_position() {
      int horizontal_occurrencies = 0;
      int long_vertical_occurrencies = 0;
      int short_vertical_occurrencies = 0;
      fflush(stdout);
      fflush(f);
      
      fseek(f, 0, SEEK_SET);
      int position;
      while (!feof(f)) {
        fscanf(f, "%d", &position); 
        if (position == 0) {
            short_vertical_occurrencies +=1;
        } else if(position == 1) {
            long_vertical_occurrencies +=1;
        } else if(position == 2) {
            horizontal_occurrencies +=1;
        }
      }
      printf("horizontal occ: %d \n",horizontal_occurrencies);
      printf("long vert occ: %d \n",long_vertical_occurrencies);
      printf("short vert occ: %d \n",short_vertical_occurrencies);
      if (horizontal_occurrencies >= long_vertical_occurrencies && horizontal_occurrencies >= short_vertical_occurrencies) {
            toggle_led(1,0,0);
        } else if (long_vertical_occurrencies >= horizontal_occurrencies && long_vertical_occurrencies >= short_vertical_occurrencies ) {
            toggle_led(0,1,0);
        } else if (short_vertical_occurrencies >= horizontal_occurrencies && short_vertical_occurrencies >= long_vertical_occurrencies) {
            toggle_led(0,0,1);
        }
      
      fflush(stdout);
      int err = fclose(f);
      printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
      if (err < 0) {
        error("error: %s (%d)\n", strerror(err), -err);
      }
      err = fs.unmount();
      printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
      if (err < 0) {
          error("error: %s (%d)\n", strerror(-err), err);
      }    
      printf("Press the restart button to sample again.");
}

void toggle() {
    int16_t pDataXYZ[3] = {0};
    BSP_ACCELERO_AccGetXYZ(pDataXYZ);
    printf("ACCELERO_X = %d\n", pDataXYZ[0]);
    printf("ACCELERO_Y = %d\n", pDataXYZ[1]);
    printf("ACCELERO_Z = %d\n\n", pDataXYZ[2]);
}

bool is_board_horizontal() {
    return (pDataXYZ[2] < 1030 && pDataXYZ[2] > 950) || (pDataXYZ[2] < -950 && pDataXYZ[2] > -1030);
}

bool is_board_vertical_short() {
    return (pDataXYZ[0] < -950  && pDataXYZ[0] > -1030) || (pDataXYZ[0] < 1030 && pDataXYZ[0] > 950);
}

bool is_board_vertical_long() {
    return (pDataXYZ[1] < 1030 && pDataXYZ[1] > 950) || (pDataXYZ[1] < -950 && pDataXYZ[1] > -1030);
}

void ticker_attach() {    
    queue.call(write_positions_on_file);
    seconds_passed++;
//    Blink correct led after 10 seconds
    if (seconds_passed == 1000) {
      timeout_ticker.detach();
      queue.call(toggle_led_based_on_position);
      seconds_passed = 0;
    }
}

int main(){
    t.start(callback(&queue, &EventQueue::dispatch_forever));
    BSP_ACCELERO_Init();
    
    // 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, 0.01);
}