bsp.c

ucosII 修改移植到 freescale MCF51JM128

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*
*                             (c) Copyright 2006, Micrium, Inc., Weston, FL
*                                          All Rights Reserved
*
*                                          Freescale MCFQE128
*                                         on the DEMOQE128 EVB
*                                         Board Support Package
*
* File         : bsp.c
* Programmer   : Eric Shufro
*********************************************************************************************************
*/

#include  "includes.h"

/*
*********************************************************************************************************
*                                       CONSTANTS
*********************************************************************************************************
*/

#define  PTC_LED_MASK   0x50                                            /* DEMOQE EVB LED bit definitions.                          */
#define  PTE_LED_MASK   0x0C                                            /* Note: PTC4 is attached to the onboard accelerometer      */
                                                                        /* Note: PTC5 is attached to the SCI transceiver enable     */
#define  PTF_LED_MASK   0x22
#define  PTD_LED_MASK   0x04
                                                                        
                                                                  

/*
*********************************************************************************************************
*                                       PROTOTYPES
*********************************************************************************************************
*/

static  void  FLL_Init(void);
static  void  OSTickISR_Init(void);                                 
static  void  LED_Init(void); 

/*
*********************************************************************************************************
*                                       GLOBALS
*********************************************************************************************************
*/

static  CPU_INT16U  OSTickCnts;                                         /* Store number of increments of timer for OS tick rate     */

/*
*********************************************************************************************************
*                                       BSP_Init()
*
* Description: Initialize FLL, OS Ticker, and other basic hardware services.
*
* Arguments  : None.
*
* Returns    : None.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  BSP_Init (void)
{ 
    SOPT1           = 0x20;                                             /* Disable COP,RSTO, enable STOP,BKGD,RESET                 */ 
    SPMSC1          = 0x00;                                             /* Disable LVD                                              */
    SPMSC2          = 0x00;                                             /* Disable power-down modes                                 */
 //   SPMSC3          = 0x00;                                             /* Disable LVWIE, low trip points                           */
    SCGC1           = 0xFF;                                             /* Enable bus clock to peripherals                          */
    SCGC2           = 0xFF;                                             /* Enable bus clock to peripherals                          */
    SCGC3           = 0xFF;       // Random number generator accelerator
    
    FLL_Init();                                                         /* Initialize the FLL.                                      */
    OSTickISR_Init();                                                   /* Initialize the TPM for use as the OS time tick source    */
    LED_Init();                                                         /* Initialize onboard LEDs                                  */
}

/*
*********************************************************************************************************
*                                       FLL_Init()
*
* Description : This function is used to initialize the FLL. The CPU clock frequency is configured
*               to 39.85MHz and the BUS Frequency is consequently set to 19.925MHz. 
*               
* Arguments   : None.
*               
* Returns     : None.
*
* Notes       : 1) The CPU clock (ICSOUT) is derived from an internal oscillator. The internal oscillator
*                  frequency may be either 31250Hz when manually trimmed, or 32768Hz when DMX32 within 
*                  ICSSC is set. Other trimmed values are possible and should be configured within
*                  bsp.h by setting the macro BSP_INT_REF_FREQ accordingly.
*               2) ICSOUT MUST NOT exceed 59.77MHz (See Note 3)
*               3) The peripheral bus frequency (Fbus) equals (ICSOUT / BDIV / 2). Fbus MUST NOT exceed
*                  10MHz when VDD is less than 2.1 volts. If VDD is greater than 2.1 volts, then Fbus
*                  must not exceed 25.165MHz.
*               4) See page 241, Table 12-7 'DCO frequency range' in MCF51QE128_Reference_Manual.pdf
*********************************************************************************************************
*/

static  void  FLL_Init (void)
{
    MCGC1 = 0x06;
    MCGC4 = 0x02;   // 48MHZ
    
    while (!MCGSC_LOCK);
}

/*
*********************************************************************************************************
*                                       BSP_CPU_ClkFreq()
*
* Description : The function may be used to determine the value of ICSOUT
*
* Arguments   : None.
* 
* Returns     : The CPU operating frequency in Hz, or 0 if unknown. 
*
* Note(s)     : 1) The CPU BUS frequency may be computed during runtime by dividing the 
*                  return value of this function by 2.
*               2) This function does not account for oscillator trimming and assumes the oscillator
*                  frequency is defined in bsp.h.
*********************************************************************************************************
*/

CPU_INT32U  BSP_CPU_ClkFreq (void)
{
    CPU_INT32U  ext_ref_freq;
    CPU_INT32U  ics_out;
    CPU_INT16U  rdiv;
    CPU_INT16U  bdiv;
    CPU_INT16U  fll_factor;
    CPU_INT08U  drs;
    CPU_INT08U  reg_val;
        
    
    ics_out                 =   0;                                      /* Initialize the return value to 0                         */
    ics_out = 48000000;
    return  (ics_out);                                                  /* Return the CPU operating frequency                       */
}

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

void  BSP_IntDisAll (void)
{
#if OS_CRITICAL_METHOD == 3
    CPU_SR  cpu_sr;
#endif

    OS_ENTER_CRITICAL();                                                /* Disable all interrupts                                   */
}

/*
*********************************************************************************************************
*                                       LED_Init()
*
* Description : Initialize the data direction registers for Port C and Port E both of which have
*               LEDs attached to their I/O pins on the DEMOQE EVB.
*
* Arguments   : None.
*
* Returns     : None.
*
* Notes       : None.
*********************************************************************************************************
*/

void  LED_Init (void)
{   
    LED_Off(0);                                                         /* Ensure LEDs I/O are initialized with LEDs off            */
    PTCDD      |=   PTC_LED_MASK;                                       /* Configure Port C LED bits as outputs                     */
    PTEDD      |=   PTE_LED_MASK;                                       /* Configure Port E LED bits as outputs                     */
    PTFDD      |=   PTF_LED_MASK;
    PTDDD      |=   PTD_LED_MASK;
}

/*
*********************************************************************************************************
*                                       LED_Toggle()
*
* Description : Toggle an LED Pin
*
* Arguments   : led   0 = Toggle ALL LEDs
*                     1 = Toggle LED 1
*                     2 = Toggle LED 2
*                     ...
*                     8 = Toggle LED 8
*
* Returns     : None.
*
* Notes       : None.
*********************************************************************************************************
*/

void  LED_Toggle (CPU_INT08U led)
{
    if (led > 8) {
        return;                                                         /* Argument checking, return if led > 8                     */    
    }    

}