tinyusb/demos/host/src/main.c

/*
 * main.c
 *
 *  Created on: Mar 24, 2013
 *      Author: hathach
 */

/*
 * Software License Agreement (BSD License)
 * Copyright (c) 2012, hathach (tinyusb.org)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the tiny usb stack.
 */

//--------------------------------------------------------------------+
// INCLUDE
//--------------------------------------------------------------------+
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "boards/board.h"
#include "tusb.h"

#include "mouse_app.h"
#include "keyboard_app.h"

#if defined(__CODE_RED)
  #include <cr_section_macros.h>
  #include <NXP/crp.h>
  // Variable to store CRP value in. Will be placed automatically
  // by the linker when "Enable Code Read Protect" selected.
  // See crp.h header for more information
  __CRP const unsigned int CRP_WORD = CRP_NO_CRP ;
#endif

//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+

//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
OSAL_TASK_FUNCTION( led_blinking_task ) (void* p_task_para);
OSAL_TASK_DEF(led_blinking_task_def, "led blinking", led_blinking_task, 128, LED_BLINKING_APP_TASK_PRIO);

void print_greeting(void);
static inline void wait_blocking_ms(uint32_t ms);

//--------------------------------------------------------------------+
// IMPLEMENTATION
//--------------------------------------------------------------------+

#if TUSB_CFG_OS == TUSB_OS_NONE
// like a real RTOS, this function is a main loop invoking each task in application and never return
void os_none_start_scheduler(void)
{
  while (1)
  {
    tusb_task_runner();
    keyboard_app_task(NULL);
    mouse_app_task(NULL);
    led_blinking_task(NULL);
  }
}
#endif


int main(void)
{
  board_init();

  // TODO blocking wait --> systick handler -->  ...... freeRTOS hardfault
  //wait_blocking_ms(1000); // wait a bit for power stable
  
  // print_greeting(); TODO uart output before freeRTOS scheduler start will lead to hardfault
  // find a way to fix this as tusb_init can output to uart when an error occurred

  tusb_init();

  //------------- application task init -------------//
  (void) osal_task_create(&led_blinking_task_def);

#if TUSB_CFG_HOST_HID_KEYBOARD
  keyboard_app_init();
#endif

#if TUSB_CFG_HOST_HID_MOUSE
  mouse_app_init();
#endif

  //------------- start OS scheduler (never return) -------------//
#if TUSB_CFG_OS == TUSB_OS_FREERTOS
  vTaskStartScheduler();

#elif TUSB_CFG_OS == TUSB_OS_NONE
  os_none_start_scheduler();
#else
  #error need to start RTOS schduler
#endif

  //------------- this part of code should not be reached -------------//
  hal_debugger_breakpoint();
  while(1)
  {

  }

  return 0;
}

//--------------------------------------------------------------------+
// BLINKING TASK
//--------------------------------------------------------------------+
OSAL_TASK_FUNCTION( led_blinking_task ) (void* p_task_para)
{
  // task init, only executed exactly one time, real RTOS does not need this but none OS does
  {
    static bool is_init = false;
    if (!is_init)
    {
      is_init = true;
      print_greeting();
    }
  }

  static uint32_t led_on_mask = 0;

  OSAL_TASK_LOOP_BEGIN

  osal_task_delay(1000);

  board_leds(led_on_mask, 1 - led_on_mask);
  led_on_mask = 1 - led_on_mask; // toggle

  OSAL_TASK_LOOP_END
}

//--------------------------------------------------------------------+
// HELPER FUNCTION
//--------------------------------------------------------------------+
void print_greeting(void)
{
  printf("\r\n\
--------------------------------------------------------------------\r\n\
-                     Host Demo (a tinyusb example)\r\n\
- if you find any bugs or get any questions, feel free to file an\r\n\
- issue at https://github.com/hathach/tinyusb\r\n\
--------------------------------------------------------------------\r\n\r\n"
  );
}

static inline void wait_blocking_us(volatile uint32_t us)
{
	us *= (SystemCoreClock / 1000000) / 3;
	while(us--);
}

static inline void wait_blocking_ms(uint32_t ms)
{
	wait_blocking_us(ms * 1000);
}