main.cpp

00001 // Code used for the SP18 E210/P442 Lab Practical
00002 #include "mbed.h"
00003 #include "ADXL362.h"
00004 #include "TSL2561.h"
00005 
00006 AnalogOut my_output(PA_4);
00007 
00008 // Interface pulled from ADXL362.cpp
00009 // ADXL362::ADXL362(PinName CS, PinName MOSI, PinName MISO, PinName SCK) :
00010 ADXL362 adxl362(PA_0,PA_7,PA_6,PA_1);
00011 TSL2561 lightsensor(PB_7,PB_6);
00012 
00013 
00014 #define PI        (3.141592653589793238462)
00015 #define AMPLITUDE (1.0)    // x * 3.3V
00016 #define PHASE     (PI * 1) // 2*pi is one period
00017 #define RANGE     (0x7FFF)
00018 #define OFFSET    (0x7FFF)
00019 
00020 #define SPI_CYCLES 100
00021 // Configuration for sinewave output
00022 #define BUFFER_SIZE (360)
00023 uint16_t buffer[BUFFER_SIZE];
00024 
00025 void calculate_sinewave(void);
00026 
00027 int main() {
00028     printf("Sinewave example\n");
00029     calculate_sinewave();
00030     adxl362.reset();
00031     wait_ms(1000); // we need to wait at least 500ms after ADXL362 reset
00032     adxl362.set_mode(ADXL362::MEASUREMENT);
00033     wait_ms(1000); // we need to wait at least 500ms after ADXL362 reset
00034     volatile int8_t x,y,z;
00035     volatile uint16_t whoami; 
00036     volatile float light;
00037     int spi_trigger_target = 0;
00038     
00039     while(1) {
00040         for (int i = 0; i < BUFFER_SIZE; i++) {
00041             my_output.write_u16(buffer[i]);
00042             wait_us(10);
00043         }
00044         x=adxl362.scanx_u8();
00045         y=adxl362.scany_u8();
00046         z=adxl362.scanz_u8();
00047         if (spi_trigger_target++ == SPI_CYCLES){
00048             spi_trigger_target = 0;
00049             whoami = adxl362.read_reg(ADXL362::DEVID_AD);
00050         } 
00051         light = lightsensor.lux();           
00052         // printf("Accelerometer x = %d y = %d z = %d\r\n",x,y,z);
00053         // printf("Light sensor %f\n\r",lightsensor.lux());
00054 //        wait_ms(100);
00055       
00056     }
00057 }
00058 
00059 // Create the sinewave buffer
00060 void calculate_sinewave(void){
00061   for (int i = 0; i < BUFFER_SIZE; i++) {
00062      double rads = (PI * i)/180.0; // Convert degree in radian
00063      buffer[i] = (uint16_t)(AMPLITUDE * (RANGE * (cos(rads + PHASE))) + OFFSET);
00064   }
00065 }