main.cpp

00001 /* This program demonstrates how to use the VCNL4010 for detecting an open closet door.
00002  * Open a serial console to the board to see extra info.
00003  */
00004  
00005 #include "mbed.h"
00006 #include "VCNL4010.h"
00007 
00008 #define SER_BUFFER_SIZE 32
00009 
00010 /* The 4 onboard LEDs */
00011 DigitalOut LED_0 (PB_6);
00012 DigitalOut LED_1 (PA_7);
00013 DigitalOut LED_2 (PA_6);
00014 DigitalOut LED_3 (PA_5);
00015 
00016 /* The 2 user buttons */
00017 InterruptIn SW1(PA_8);
00018 InterruptIn SW2(PB_10);
00019 
00020 /* Proximity and ambient light sensor*/
00021 VCNL40x0 VCNL4010(PB_9, PB_8, VCNL40x0_ADDRESS);      // SDA, SCL pin and I2C address
00022 
00023 /* Function prototypes */
00024 void sw1interrupt();
00025 void sw2interrupt();
00026 void sertmout();
00027 bool modem_command_check_ok(char * command);
00028 void modem_setup();
00029 
00030 bool ser_timeout = false; 
00031 
00032 /* Serial port over USB */
00033 Serial pc(USBTX, USBRX);
00034 
00035 /* Serial connection to sigfox modem */
00036 Serial modem(PA_9, PA_10);
00037 
00038 
00039 bool indoor = false;
00040 int indoorLight; 
00041 
00042 
00043 int main() {
00044     
00045     unsigned char ID=0;
00046     unsigned int  AmbiValue=0;
00047     
00048     /* Setup TD120x */
00049     wait(3);
00050     modem_setup();
00051     
00052     /* Turn off all LED */
00053     LED_0 = 1;
00054     LED_1 = 1;
00055     LED_2 = 1;
00056     LED_3 = 1;
00057     
00058     /* Setup button interrupts */    
00059     SW1.fall(&sw1interrupt);
00060     SW2.fall(&sw2interrupt);    
00061 
00062     /* Read VCNL40x0 product ID revision register */
00063     VCNL4010.ReadID (&ID);
00064     pc.printf("\n\nProduct ID Revision Register: %d", ID);
00065 
00066     wait_ms(3000);                                      //Wait 3s (only for display)
00067     
00068     /* Calibrate the system by measuring the indoor light */
00069     while(indoor != true){
00070         LED_3 = 0;
00071         wait_ms(500);  
00072         LED_3 = 1;
00073         wait_ms(500);
00074     }
00075     VCNL4010.ReadAmbiOnDemand (&AmbiValue);             //Read ambi value on demand
00076     indoorLight = AmbiValue;
00077     pc.printf("\rIndoor light value is: %5.0i\n", indoorLight);
00078     
00079     while(1) { 
00080         VCNL4010.ReadAmbiOnDemand (&AmbiValue);         //Read ambi value on demand
00081         
00082         if(AmbiValue > (indoorLight+50)){
00083             LED_0 = 0;                                  //Turn on LED_0 to indicate open closet and Sigfox transmission
00084             pc.printf("\rCloset door has been opened!\n");
00085             char command[SER_BUFFER_SIZE];
00086             sprintf(command, "AT$SF=05%04x,2,0\n", (int) AmbiValue );
00087             pc.printf("Sending ambient value %5.0i over Sigfox using modem command: %s\n", AmbiValue , command);
00088             modem_command_check_ok(command);
00089             LED_0 = 1;                                  //Turn off LED_0
00090             wait_ms(5000);                              //Wait 5 seconds before checking again
00091         } 
00092     }
00093 }
00094 
00095 void modem_setup()
00096 {
00097     /* Reset to factory defaults */
00098     if(modem_command_check_ok("AT&F")) 
00099     {
00100         pc.printf("Factory reset succesfull\r\n");
00101     }
00102     else 
00103     {
00104         pc.printf("Factory reset TD120x failed\r\n");
00105     }
00106     /* Disable local echo */
00107     modem.printf("ATE0\n");
00108     if(modem_command_check_ok("ATE0")) 
00109     {
00110         pc.printf("Local echo disabled\r\n");
00111     }
00112     /* Write to mem */
00113     if(modem_command_check_ok("AT&W")) 
00114     {
00115         pc.printf("Settings saved!\r\n");
00116     }    
00117 }
00118 
00119 bool modem_command_check_ok(char * command)
00120 {
00121     /* First clear serial data buffers */
00122     while(modem.readable()) modem.getc();
00123     /* Timeout for response of the modem */
00124     Timeout tmout;
00125     ser_timeout = false;
00126     /* Buffer for incoming data */
00127     char responsebuffer[6];
00128     /* Flag to set when we get 'OK' response */
00129     bool ok = false;
00130     bool error = false;
00131     /* Print command to TD120x */
00132     modem.printf(command);
00133     /* Newline to activate command */
00134     modem.printf("\n");
00135     /* Wait untill serial feedback, min 7 seconds before timeout */
00136     tmout.attach(&sertmout, 7.0);
00137     while(!modem.readable()&& ser_timeout == false);
00138     while(!ok && !ser_timeout && !error) 
00139     {
00140         if(modem.readable()) 
00141         {
00142             for(int i = 0; i < 5; i++)
00143             {
00144                 responsebuffer[i] = responsebuffer[i+1];
00145             }
00146             responsebuffer[5] = modem.getc();
00147             if(responsebuffer[0] == '\r' && responsebuffer[1] == '\n' && responsebuffer[2] == 'O' && responsebuffer[3] == 'K' && responsebuffer[4] == '\r' && responsebuffer[5] == '\n' ) 
00148             {
00149                 ok = true;
00150             }
00151             else if(responsebuffer[0] == '\r' && responsebuffer[1] == '\n' && responsebuffer[2] == 'E' && responsebuffer[3] == 'R' && responsebuffer[4] == 'R' && responsebuffer[5] == 'O' ) 
00152             {
00153                 error = true;
00154             }
00155         }
00156     }
00157     tmout.detach();
00158     return ok;
00159 }
00160 
00161 /* Button 1 ISR */
00162 void sw1interrupt()
00163 {
00164     pc.printf("\n\rButton 1 pressed\n\r");
00165     indoor =  true;
00166     pc.printf("\n\rIndoor light measured\n\r");   
00167 }
00168 
00169 /* Button 2 ISR */
00170 void sw2interrupt()
00171 {
00172     pc.printf("\n\rButton 2 pressed\n\r");
00173     indoor =  true;
00174     pc.printf("\n\rIndoor light measured\n\r");
00175     
00176 }
00177 
00178 /* ISR for serial timeout */
00179 void sertmout()
00180 {
00181     ser_timeout = true;
00182 }
00183 
00184 
00185