generic-FreeRTOS-demo/main.c

   1 #include "main.h"
   2
   3 unsigned int compareMatch =0;
   4
   5 int main( void )
   6 {
   7
   8     init_low_level();   // CPU Frequency & PLL
   9     init_pio();         // Map port pins to selected functions
  10     init_peripheral();  // UART,Timer,Extint,ADC Enable
  11     init_armadillo_tasks();
  12
  13     xTaskCreate(led_blink, ( signed char * ) "Blinky", configMINIMAL_STACK_SIZE
  14             ,NULL, tskIDLE_PRIORITY + 2 , NULL );
  15     xTaskCreate(task2, ( signed char * ) "task2", configMINIMAL_STACK_SIZE
  16             ,NULL, tskIDLE_PRIORITY + 3 , NULL );
  17
  18     vTaskStartScheduler();
  19
  20     return 0; // Should not reach here unless scheduler fails
  21
  22 }
  23 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24 static void led_blink( void *pvParameters )
  25 {
  26     (void) pvParameters;  //Prevent warning
  27
  28     portTickType xLastWakeTime;
  29     portTickType TickCount;
  30     const portTickType xFrequency = 1; //50
  31     unsigned int cnt=0;
  32
  33     xLastWakeTime = xTaskGetTickCount();
  34
  35     for( ;; ){
  36
  37         vTaskDelayUntil( &xLastWakeTime, xFrequency );
  38         TickCount = xTaskGetTickCount();
  39
  40         char txbuff[configUART0_BUFF_SIZE];
  41
  42         if(cnt%8==0){    // takes 110 us
  43             sprintf(txbuff,"$%4d %s\r",cnt/8,"seconds");
  44
  45             if(xSemaphoreTake(xMutexTX0,( portTickType ) 1)){
  46                 serial_pack((unsigned char *)txbuff);
  47                 xSemaphoreGive(xMutexTX0);
  48             }
  49
  50         }
  51
  52         if(cnt%8<4){ // Heart Beat
  53             if(IOPIN0&S_LED)IOCLR0 = S_LED; else IOSET0 = S_LED;
  54         }
  55
  56         cnt++;
  57
  58     }
  59
  60 }
  61 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  62 static void task2( void *pvParameters )
  63 {
  64     (void) pvParameters;  //Prevent warning
  65
  66     portTickType xLastWakeTime;
  67     portTickType TickCount;
  68     const portTickType xFrequency = 9; //50
  69     unsigned int cnt=0;
  70
  71     xLastWakeTime = xTaskGetTickCount();
  72
  73     for( ;; ){
  74
  75         vTaskDelayUntil( &xLastWakeTime, xFrequency );
  76         TickCount = xTaskGetTickCount();
  77
  78         char txbuff[configUART0_BUFF_SIZE];
  79
  80         sprintf(txbuff,"$%4d %s\r",cnt,"task2");
  81
  82         if(xSemaphoreTake(xMutexTX0,( portTickType ) 1)){
  83             serial_pack((unsigned char *)txbuff);
  84             xSemaphoreGive(xMutexTX0);
  85         }
  86         cnt++;
  87     }
  88
  89 }