apps/helloworld/main.c

   1 /* Copyright (C) 2013, 2015 Czech Technical University in Prague
   2  *
   3  * Authors:
   4  *     - Carlos Jenkins <carlos@jenkins.co.cr>
   5  *
   6  * This document contains proprietary information belonging to Czech
   7  * Technical University in Prague. Passing on and copying of this
   8  * document, and communication of its contents is not permitted
   9  * without prior written authorization.
  10  *
  11  * File : main.c
  12  * Abstract:
  13  *     Example/Base main file for RPP API library.
  14  *
  15  * References:
  16  *     RPP API documentation.
  17  */
  18
  19
  20 #include "rpp/rpp.h"
  21
  22
  23 void my_task(void *p)
  24 {
  25         static const portTickType freq_ticks = 1000 / portTICK_RATE_MS;
  26         portTickType last_wake_time = xTaskGetTickCount();
  27
  28         while (TRUE) {
  29
  30                 /* Wait until next step */
  31                 vTaskDelayUntil(&last_wake_time, freq_ticks);
  32                 rpp_sci_printf((const char *)"Hello RPP.\r\n");
  33
  34         }
  35 }
  36
  37
  38 void main(void)
  39 {
  40         /* Initialize RPP board */
  41         rpp_init();
  42
  43         /* Spawn tasks */
  44         if (xTaskCreate(my_task, FREERTOS_TASK_NAME("my_task"),
  45                                         512, NULL, 0, NULL) != pdPASS) {
  46                 #ifdef DEBUG
  47                 rpp_sci_printf((const char *)
  48                                            "ERROR: Cannot spawn control task.\r\n"
  49                                            );
  50                 #endif
  51                 while (TRUE)
  52                         asm (" nop");
  53         }
  54
  55         /* Start the FreeRTOS Scheduler */
  56         vTaskStartScheduler();
  57
  58         /* Catch scheduler start error */
  59         #ifdef DEBUG
  60         rpp_sci_printf((const char *)
  61                                    "ERROR: Problem allocating memory for idle task.\r\n"
  62                                    );
  63         #endif
  64         while (TRUE)
  65                 asm (" nop");
  66 }
  67
  68
  69 #if configUSE_MALLOC_FAILED_HOOK == 1
  70 /**
  71  * FreeRTOS malloc() failed hook.
  72  */
  73 void vApplicationMallocFailedHook(void)
  74 {
  75         #ifdef DEBUG
  76         rpp_sci_printf((const char *)
  77                                    "ERROR: manual memory allocation failed.\r\n"
  78                                    );
  79         #endif
  80 }
  81 #endif
  82
  83
  84 #if configCHECK_FOR_STACK_OVERFLOW > 0
  85 /**
  86  * FreeRTOS stack overflow hook.
  87  */
  88 void vApplicationStackOverflowHook(xTaskHandle xTask,
  89                                                                    signed portCHAR *pcTaskName)
  90 {
  91         #ifdef DEBUG
  92         rpp_sci_printf((const char *)
  93                                    "ERROR: Stack overflow : \"%s\".\r\n", pcTaskName
  94                                    );
  95         #endif
  96 }
  97 #endif