Revision 1:acabcc8fed83, committed 2015-12-02

Comitter:

quicksand

Date:

Wed Dec 02 11:40:48 2015 +0000

Parent:

0:4b56d28cc7e9

Child:

2:98a0b0ea3457

Commit message:

This library demonstrates how to use the sensors on the QW Shield.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Dec 02 11:40:48 2015 +0000
@@ -0,0 +1,253 @@
+/* This program demonstrates how one can use all the sensors on the QW shield.
+ * Open a serial console to the board to get a readout of all the onboard sensors.
+ */
+
+#include "mbed.h"
+#include "math.h"
+#include "LinearTempSensor.h"
+#include "VCNL4010.h"
+
+#define SER_BUFFER_SIZE 32
+
+/* The 4 onboard LEDs */
+DigitalOut LED_0 (PB_6);
+DigitalOut LED_1 (PA_7);
+DigitalOut LED_2 (PA_6);
+DigitalOut LED_3 (PA_5);
+
+/* The 2 user buttons */
+InterruptIn SW1(PA_8);
+InterruptIn SW2(PB_10);
+
+/* Proximity and ambient light sensor*/
+VCNL40x0 VCNL4010(PB_9, PB_8, VCNL40x0_ADDRESS);      // SDA, SCL pin and I2C address
+
+/*Temperature sensor */
+LinearTempSensor sensor(PA_0);
+
+/* Function prototypes */
+void sw1interrupt();
+void sw2interrupt();
+void sertmout();
+bool read_acc(int& x, int& y, int& z);
+bool modem_command_check_ok(char * command);
+void modem_setup();
+
+bool ser_timeout = false;
+
+/* Serial port over USB */
+Serial pc(USBTX, USBRX);
+
+/* Serial connection to sigfox modem */
+Serial modem(PA_9, PA_10);
+
+int main()
+{
+    /* Storage for VCNL4010 readout */
+    unsigned char ID=0, Current=0;
+    unsigned int  ProxiValue=0, AmbiValue=0;
+
+    /* Variables that will store analog temperature sensor reading */
+    float Vout, Tav, To;
+
+    /* Setup TD120x */
+    wait(3);
+    modem_setup();
+
+    /* Turn off all LED */
+    LED_0 = 1;
+    LED_1 = 1;
+    LED_2 = 1;
+    LED_3 = 1;
+
+    /* Setup button interrupts */
+    SW2.fall(&sw2interrupt);
+    SW1.fall(&sw1interrupt);
+
+    /* Read VCNL40x0 product ID revision register */
+    VCNL4010.ReadID (&ID);
+    pc.printf("\nVCNL4010 Product ID Revision Register: %d", ID);
+
+    VCNL4010.SetCurrent (20);                        // Set current to 200mA
+    VCNL4010.ReadCurrent (&Current);                 // Read back IR LED current
+    pc.printf("\nVCNL4010 IR LED Current: %d\n\n", Current);
+
+    wait_ms(3000);                                   // wait 3s (only for display)
+
+    while(1) 
+    {
+        /* VCNL4010 reading */
+        VCNL4010.ReadProxiOnDemand (&ProxiValue);    // read prox value on demand
+        VCNL4010.ReadAmbiOnDemand (&AmbiValue);      // read ambi value on demand
+        /* MCP9700 reading */
+        Vout = sensor.Sense();
+        Tav  = sensor.GetAverageTemp();
+        To   = sensor.GetLatestTemp();
+
+        
+        /* Fetch accelerometer reading from TD1204 */
+        int x = 0;
+        int y = 0;
+        int z = 0;
+        
+        if(read_acc(x, y, z))
+        {
+            pc.printf("\n\rAccelerometer reading: %i X, %i Y, %i Z", x,y,z);
+        }
+        else
+        {
+            pc.printf("\n\rFailed to read accelerometer");
+        }
+
+        pc.printf("\n\rVCNL4010 reading: Proximity: %5.0i cts, Ambient light: %5.0i cts, Illuminance: %7.2f lx\n\rMCP9700 reading:  Vout: %.2f mV, Average Temp: %.2f %cC, Latest Temp: %.2f %cC\n\r", ProxiValue, AmbiValue, AmbiValue/4.0, Vout, Tav, 176, To, 176);
+        wait_ms(1000);
+    }
+}
+
+void modem_setup()
+{
+    /* Reset to factory defaults */
+    if(modem_command_check_ok("AT&F")) 
+    {
+        pc.printf("Factory reset succesfull\r\n");
+    }
+    else 
+    {
+        pc.printf("Factory reset TD120x failed\r\n");
+    }
+    /* Disable local echo */
+    modem.printf("ATE0\n");
+    if(modem_command_check_ok("ATE0")) 
+    {
+        pc.printf("Local echo disabled\r\n");
+    }
+    /* Write to mem */
+    if(modem_command_check_ok("AT&W")) 
+    {
+        pc.printf("Settings saved!\r\n");
+    }
+    /* Start accelerometer reading - Data monitoring - Normal power, high resolution, 25 Hz rate, +/-2G full scale, no high pass filter. Ouptput data format is X Y Z */
+    if(modem_command_check_ok("ATS650=1,0,3,2,0")) 
+    {
+        pc.printf("Accellerometer monitoring started successfully\r\n");
+    }
+    else
+    {
+        pc.printf("Accellerometer monitoring start failed\r\n");
+    }
+}
+
+bool modem_command_check_ok(char * command)
+{
+    /* first clear serial data buffers */
+    while(modem.readable()) modem.getc();
+    /* Timeout for response of the modem */
+    Timeout tmout;
+    ser_timeout = false;
+    /* Buffer for incoming data */
+    char responsebuffer[6];
+    /* Flag to set when we get 'OK' response */
+    bool ok = false;
+    bool error = false;
+    /* Print command to TD120x */
+    modem.printf(command);
+    /* Newline to activate command */
+    modem.printf("\n");
+    /* Wait untill serial feedback, max 3 seconds before timeout */
+    tmout.attach(&sertmout, 3.0);
+    while(!modem.readable()&& ser_timeout == false);
+    while(!ok && !ser_timeout && !error) 
+    {
+        if(modem.readable()) 
+        {
+            for(int i = 0; i < 5; i++)
+            {
+                responsebuffer[i] = responsebuffer[i+1];
+            }
+            responsebuffer[5] = modem.getc();
+            if(responsebuffer[0] == '\r' && responsebuffer[1] == '\n' && responsebuffer[2] == 'O' && responsebuffer[3] == 'K' && responsebuffer[4] == '\r' && responsebuffer[5] == '\n' ) 
+            {
+                ok = true;
+            }
+            else if(responsebuffer[0] == '\r' && responsebuffer[1] == '\n' && responsebuffer[2] == 'E' && responsebuffer[3] == 'R' && responsebuffer[4] == 'R' && responsebuffer[5] == 'O' ) 
+            {
+                error = true;
+            }
+        }
+    }
+    tmout.detach();
+    return ok;
+}
+
+bool read_acc(int& x, int& y, int& z)
+{
+        /* first clear serial data buffers */
+        while(modem.readable()) modem.getc();
+        /* Timeout for response of the modem */
+        Timeout tmout;
+        ser_timeout = false;
+        /* counter to fill buffer */
+        int i = 0;
+        /* Buffer for incoming data */
+        char responsebuffer[SER_BUFFER_SIZE];
+        /* Flag to set when we get to the end of the data '/r' response */
+        bool end = false;
+        /* Wait untill serial feedback, max 3 seconds before timeout */
+        tmout.attach(&sertmout, 3.0);
+        do{
+            while(!modem.readable()&& ser_timeout == false);
+            /* Wait untill '\n' from last data*/
+        }while((modem.getc() != '\n') && ser_timeout == false);
+        while(end == false && ser_timeout == false && i < SER_BUFFER_SIZE) 
+        {
+            if(modem.readable()) {
+                responsebuffer[i] = modem.getc();
+                if(responsebuffer[i] == '\n') {
+                    end = true;
+                    responsebuffer[i] = 0;
+                }
+                i++;
+            }
+
+        }
+        tmout.detach();
+        /* What is left now is getting the X,Y,Z coordinates out of the string */
+        if(end)
+        {
+            char * token;
+            token = strtok(responsebuffer, " ");
+            x = atoi(token);
+            token = strtok(NULL, " ");
+            token = strtok(NULL, " ");
+            y = atoi(token);
+            token = strtok(NULL, " ");
+            token = strtok(NULL, " ");
+            z = atoi(token);
+            return true;
+        }
+        else
+        {
+            return false;
+        }   
+}
+
+/* Button 1 ISR */
+void sw1interrupt()
+{
+    pc.printf("\n\rButton 1 pressed\n\r");
+}
+
+/* Button 2 ISR */
+void sw2interrupt()
+{
+    pc.printf("\n\rButton 2 pressed\n\r");
+}
+
+/* ISR for serial timeout */
+void sertmout()
+{
+    ser_timeout = true;
+}
+
+
+