Diff: main.cpp

Revision:

0:40a58635c6be

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 06 16:58:39 2018 +0000
@@ -0,0 +1,159 @@
+
+#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"
+
+#include "stm32l475e_iot01_tsensor.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(4096, BLOCK_SIZE);
+
+// File system declaration
+LittleFileSystem fs("fs");
+
+// Set up the button to trigger an erase
+InterruptIn irq(BUTTON1);
+void erase() {
+    printf("Initializing the block device... ");
+    fflush(stdout);
+    int err = bd.init();
+    printf("%s\n", (err ? "Fail :(" : "OK"));
+    if (err) {
+        error("error: %s (%d)\n", strerror(-err), err);
+    }
+
+    printf("Erasing the block device... ");
+    fflush(stdout);
+    err = bd.erase(0, bd.size());
+    printf("%s\n", (err ? "Fail :(" : "OK"));
+    if (err) {
+        error("error: %s (%d)\n", strerror(-err), err);
+    }
+
+    printf("Deinitializing the block device... ");
+    fflush(stdout);
+    err = bd.deinit();
+    printf("%s\n", (err ? "Fail :(" : "OK"));
+    if (err) {
+        error("error: %s (%d)\n", strerror(-err), err);
+    }
+}
+
+
+// Entry point for the example
+
+Ticker toggle_write_to_file;
+EventQueue queue(16 * EVENTS_EVENT_SIZE);
+Thread t;
+static FILE *f;
+InterruptIn button(USER_BUTTON);
+
+void writeTemToFile(){
+    float temp = BSP_TSENSOR_ReadTemp();
+    printf("\nTEMPERATURE = %.2f degC\n", temp);
+    
+    fprintf(f, "%f\n", temp);
+    fflush(stdout); 
+    fflush(f); 
+}
+
+void readTempFile(){
+    fflush(stdout);
+    fflush(f); 
+    fseek(f, 0, SEEK_SET);
+    printf("Temperature time line: \n");
+    while (!feof(f)) {
+        float temp;
+        fscanf(f, "%f", &temp);
+        printf("%f degC ", temp);
+    }
+    printf("\n");
+    fflush(stdout);
+}
+
+void readSensorInterupt() {
+    queue.call(writeTemToFile);
+}
+
+void printSensorInterupt() {
+    queue.call(readTempFile);    
+}
+
+int main() {
+    // Setup the erase event on button press, use the event queue
+    // to avoid running in interrupt context
+    irq.fall(mbed_event_queue()->event(erase));
+
+    // 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);
+        }
+        
+        printf("Seeking file... ");
+        fflush(stdout);
+        err = fseek(f, 0, SEEK_SET);
+        printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
+        if (err < 0) {
+            error("error: %s (%d)\n", strerror(errno), -errno);
+        }
+    }
+    
+    t.start(callback(&queue, &EventQueue::dispatch_forever));
+    printf("Start sampling... \n");
+    BSP_TSENSOR_Init();
+    toggle_write_to_file.attach(&readSensorInterupt, 5);
+    button.rise(&printSensorInterupt);
+}
\ No newline at end of file