bsp.c

ucos在STM32F103R8T6移植 智林 stm32开发板

/*
*********************************************************************************************************
*                                     MICIRUM BOARD SUPPORT PACKAGE
*
*                             (c) Copyright 2007; Micrium, Inc.; Weston, FL
*
*               All rights reserved.  Protected by international copyright laws.
*               Knowledge of the source code may NOT be used to develop a similar product.
*               Please help us continue to provide the Embedded community with the finest
*               software available.  Your honesty is greatly appreciated.
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*
*                                        BOARD SUPPORT PACKAGE
*
*                                     ST Microelectronics STM32
*                                              with the
*                                   IAR STM32-SK Evaluation Board
*
* Filename      : bsp.c
* Version       : V1.00
* Programmer(s) : Brian Nagel
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                             INCLUDE FILES
*********************************************************************************************************
*/

#define  BSP_GLOBALS
#include <includes.h>

static  void  Tmr_TickInit  (void);

/*
*********************************************************************************************************
*                                     LOCAL CONFIGURATION ERRORS
*********************************************************************************************************
*/


/*
******************************************************************************************************************************
******************************************************************************************************************************
**                                         Global Functions
******************************************************************************************************************************
******************************************************************************************************************************
*/

/*
*********************************************************************************************************
*                                         BSP INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
*               functions found in this module.
*
* Arguments   : none
*********************************************************************************************************
*/

void  BSP_Init (void)
{
    RCC_DeInit();
    RCC_HSEConfig(RCC_HSE_ON);
    RCC_WaitForHSEStartUp();


    RCC_HCLKConfig(RCC_SYSCLK_Div1);
    RCC_PCLK2Config(RCC_HCLK_Div1);
    RCC_PCLK1Config(RCC_HCLK_Div2);
    RCC_ADCCLKConfig(RCC_PCLK2_Div6);
//    FLASH_SetLatency(FLASH_Latency_2);
 //   FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
    RCC_PLLCmd(ENABLE);

    while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) {
        ;
    }

    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    while (RCC_GetSYSCLKSource() != 0x08) {
        ;
    }
    Tmr_TickInit();                                             /* Initialize the uC/OS-II tick interrupt                   */
}


/*
*********************************************************************************************************
*                                     DISABLE ALL INTERRUPTS
*
* Description : This function disables all interrupts from the interrupt controller.
*
* Arguments   : None.
*
* Returns     : None.
*********************************************************************************************************
*/

void  BSP_IntDisAll (void)
{
    CPU_IntDis();
}


/*
*********************************************************************************************************
*                                      GET THE CPU CLOCK FREQUENCY
*
* Description: This function reads CPU registers to determine the CPU clock frequency of the chip in KHz.
*
* Argument(s): None.
*
* Returns    : The CPU clock frequency, in Hz.
*********************************************************************************************************
*/

CPU_INT32U  BSP_CPU_ClkFreq (void)
{
    static  RCC_ClocksTypeDef  rcc_clocks;


    RCC_GetClocksFreq(&rcc_clocks);

    return ((CPU_INT32U)rcc_clocks.HCLK_Frequency);
}

/*
******************************************************************************************************************************
******************************************************************************************************************************
**                                         uC/OS-II Timer Functions
******************************************************************************************************************************
******************************************************************************************************************************
*/

/*
*********************************************************************************************************
*                                       TICKER INITIALIZATION
*
* Description : This function is called to initialize uC/OS-II's tick source (typically a timer generating
*               interrupts every 1 to 100 mS).
*
* Arguments   : none
*
* Note(s)     : 1) The timer is setup for output compare mode BUT 'MUST' also 'freerun' so that the timer
*                  count goes from 0x00000000 to 0xFFFFFFFF to ALSO be able to read the free running count.
*                  The reason this is needed is because we use the free-running count in uC/OS-View.
*********************************************************************************************************
*/

static  void  Tmr_TickInit (void)
{
  //  RCC_ClocksTypeDef  rcc_clocks;
  //  CPU_INT32U         cnts;


  //  RCC_GetClocksFreq(&rcc_clocks);

  //  cnts = (CPU_INT32U)rcc_clocks.HCLK_Frequency / OS_TICKS_PER_SEC;

 //   SysTick_SetReload(cnts);
    SysTick_SetReload(9000);
    SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
    SysTick_CounterCmd(1);
    SysTick_ITConfig(ENABLE);
}


/*
*********************************************************************************************************
*                                         TIMER IRQ HANDLER
*
* Description : This function handles the timer interrupt that is used to generate TICKs for uC/OS-II.
*
* Arguments   : none
*
* Note(s)     : 1) The timer is 'reloaded' with the count at compare + the time for the next interrupt.
*                  Since we are using 'unsigned' integer math, overflows are irrelevant.
*********************************************************************************************************
*/

void  Tmr_TickISR_Handler (void)
{
    OS_CPU_SR  cpu_sr;


    OS_ENTER_CRITICAL();                                        /* Tell uC/OS-II that we are starting an ISR                */
    OSIntNesting++;
    OS_EXIT_CRITICAL();

    OSTimeTick();                                               /* Call uC/OS-II's OSTimeTick()                             */

    OSIntExit();                                                /* Tell uC/OS-II that we are leaving the ISR                */
}