Pileus Git - ~andy/csm213a-hw/blob - hw2/tester.cpp

   1 /* main.cpp
   2  * mbed project: Simple_Square_Wave
   3  * mbed board: FRDM-KL46Z
   4  * Generate square waves using DigitalOut.
   5  */
   6
   7 #include "mbed.h"
   8
   9 DigitalOut Square_Wave(PTD3); // Used PWM output is PTD3
  10 InterruptIn Control_Testing(PTC12);  // SW3
  11
  12 void Control_T(void);
  13
  14 int START_STOP_FLAG = 0;
  15 float period_s = 0.0001;
  16
  17 extern serial_t stdio_uart;
  18
  19 int main(int arc, char **argv)
  20 {
  21         serial_init(&stdio_uart, USBTX, USBRX);
  22         serial_baud(&stdio_uart, 115200);
  23         printf("starting\r\n");
  24
  25         Control_Testing.rise(&Control_T);    // Enable getMode interrupt handler
  26         __enable_irq();
  27
  28         while(1)
  29         {
  30                 if(START_STOP_FLAG == 1)
  31                 {
  32                         Square_Wave.write(0);
  33                         wait(period_s/2);
  34                         Square_Wave.write(1);
  35                         wait(period_s/2);
  36                 }
  37                 else
  38                         Square_Wave.write(0);
  39         }
  40 }
  41
  42 void Control_T(void)
  43 {
  44         if(START_STOP_FLAG == 0)
  45         {
  46                 period_s = 1;
  47                 START_STOP_FLAG = 1;
  48         }
  49         else
  50         {
  51                 START_STOP_FLAG = 0;
  52                 Square_Wave.write(0);
  53         }
  54 }