bsp.c

ucos+ucgui+proteus仿真lpc2138.非常强大的例子。用keil for arm 编译。值得下载。强烈推荐。

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

#define  BSP_GLOBALS
#include <includes.h>

/*
*********************************************************************************************************
*                                       LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/

CPU_INT32U  VIC_SpuriousInt;


/*
*********************************************************************************************************
*                                      LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/

static  void  LED_Init       (void);

static  void  BSP_IO_Init    (void);
static  void  BSP_PLL_Init   (void);


static  void  VIC_Init       (void);
static  void  VIC_Dummy      (void);
static  void  VIC_DummyWDT   (void);
static  void  VIC_DummyTIMER0(void);
static  void  VIC_DummyTIMER1(void);
static  void  VIC_DummyUART0 (void);
static  void  VIC_DummyUART1 (void);
static  void  VIC_DummyPWM0  (void);
static  void  VIC_DummyI2C   (void);
static  void  VIC_DummySPI   (void);
static  void  VIC_DummyRTC   (void);
static  void  VIC_DummyEINT0 (void);
static  void  VIC_DummyEINT1 (void);
static  void  VIC_DummyEINT2 (void);

static  void  Tmr_TickInit (void);

static void  LCD_WriteCommand3(CPU_INT08U cmd, CPU_INT08U dat1, CPU_INT08U dat2);
static void  LCD_WriteCommand1(CPU_INT08U cmd);
static void  LCD_Command_Data_OK(void);
static void  LCD_NormalWrite_Data(CPU_INT08U data);

/*
*********************************************************************************************************
*                                             BSP_Init()
*
* Description : Initialize the Board Support Package (BSP).
*
* Argument(s) : none.
*
* Return(s)   : none.
*
* Note(s)     : (1) This function SHOULD be called before any other BSP function is called.
*********************************************************************************************************
*/

void  BSP_Init (void)
{
    BSP_PLL_Init();                                             /* Initialize PLL0 and the VPB Divider Register             */
    BSP_IO_Init();                                              /* Initialize the board's I/Os                              */

    VIC_Init();                                                 /* Initialize the Vectored Interrupt Controller             */
    LED_Init();                                                 /* Initialize the LED controls                              */
    
	Tmr_TickInit();                                             /* Initialize the uC/OS-II tick interrupt                   */
}

/*
*********************************************************************************************************
*                                            BSP_CPU_ClkFreq()
*
* Description : Get the CPU clock frequency.
*
* Argument(s) : none.
*
* Return(s)   : The CPU clock frequency, in Hz.
*********************************************************************************************************
*/

CPU_INT32U  BSP_CPU_ClkFreq (void)
{
    CPU_INT32U  msel;
    CPU_INT32U  cpu_clk_freq;


    msel         = (CPU_INT32U)(PLLCFG & 0x1F);
    cpu_clk_freq = CPU_OSC_FREQ * (msel + 1);
    return (cpu_clk_freq);
}


/*
*********************************************************************************************************
*                                            BSP_CPU_PclkFreq()
*
* Description : Get the peripheral clock frequency.
*
* Argument(s) : none.
*
* Return(s)   : The peripheral clock frequency, in Hz.
*********************************************************************************************************
*/

CPU_INT32U  BSP_CPU_PclkFreq (void)
{
    CPU_INT32U  msel;
    CPU_INT32U  vpbdiv;
    CPU_INT32U  clk_freq;
    CPU_INT32U  pclk_freq;


    msel         = (CPU_INT32U)(PLLCFG   & 0x1F);
    clk_freq     = CPU_OSC_FREQ * (msel + 1);

    vpbdiv       = (CPU_INT32U)(VPBDIV & 0x03);
    switch (vpbdiv) {
        case 0:
             pclk_freq = clk_freq / 4;
             break;

        case 1:
             pclk_freq = clk_freq;
             break;

        case 2:
             pclk_freq = clk_freq / 2;
             break;

        default:
             pclk_freq = clk_freq / 4;
             break;
    }
    return (pclk_freq);
}

/*
*********************************************************************************************************
*                                          OS_CPU_ExceptHndlr()
*
* Description : Handle any exceptions.
*
* Argument(s) : except_id     ARM exception type:
*
*                                  OS_CPU_ARM_EXCEPT_RESET             0x00
*                                  OS_CPU_ARM_EXCEPT_UNDEF_INSTR       0x01
*                                  OS_CPU_ARM_EXCEPT_SWI               0x02
*                                  OS_CPU_ARM_EXCEPT_PREFETCH_ABORT    0x03
*                                  OS_CPU_ARM_EXCEPT_DATA_ABORT        0x04
*                                  OS_CPU_ARM_EXCEPT_ADDR_ABORT        0x05
*                                  OS_CPU_ARM_EXCEPT_IRQ               0x06
*                                  OS_CPU_ARM_EXCEPT_FIQ               0x07
*
* Return(s)   : none.
*
* Caller(s)   : OS_CPU_ARM_EXCEPT_HANDLER(), which is declared in os_cpu_a.s.
*********************************************************************************************************
*/

void  OS_CPU_ExceptHndlr (CPU_INT32U  except_id)
{
    CPU_FNCT_VOID  pfnct;


    if (except_id == OS_CPU_ARM_EXCEPT_IRQ) {

        pfnct = (CPU_FNCT_VOID)VICVectAddr;                     /* Read the interrupt vector from the VIC                   */
        //while (pfnct != (CPU_FNCT_VOID)0) {                     /* Make sure we don't have a NULL pointer,to handle all the interrupt   */
          (*pfnct)();                                           /* Execute the ISR for the interrupting device              */
            VICVectAddr = 0;                                    /* Acknowlege the VIC interrupt update remain interrupt,vale don't care  */
            //pfnct = (CPU_FNCT_VOID)VICVectAddr;                 /* Read the interrupt vector from the VIC                   */
        //}

    } else {

                                                                /* Infinite loop on other exceptions.                       */
                                                                /* Should be replaced by other behavior (reboot, etc.)      */
        while (DEF_TRUE) {
            ;
        }
    }
}


/*
*********************************************************************************************************
*                                            Tmr_TickInit()
*
* Description : Initialize uC/OS-II's tick source.
*
* Argument(s) : none.
*
* Return(s)   : none.
*********************************************************************************************************
*/

static  void  Tmr_TickInit (void)
{
    CPU_INT32U  pclk_freq;
    CPU_INT32U  tmr_reload;

                                                                /* VIC TIMER #0 Initialization                              */
    VICIntSelect &= ~(1 << VIC_TIMER0);                         /* Timer0 interrupt is the IRQ,not FIQ                      */
    VICVectAddr2  = (CPU_INT32U)Tmr_TickISR_Handler;            /* Set the vector address                                   */
    VICVectCntl2  = 0x20 | VIC_TIMER0;                          /* Enable vectored interrupts                               */
    VICIntEnable  = (1 << VIC_TIMER0);                          /* Enable Interrupts                                        */ 

    pclk_freq     = BSP_CPU_PclkFreq();
    tmr_reload    = pclk_freq / OS_TICKS_PER_SEC;
    T0TCR         = 0;                                          /* Disable timer 0.                                         */
    T0PC          = 0;                                          /* Prescaler is set to no division.                         */

    T0MR0         = tmr_reload;
    T0MCR         = 3;                                          /* Interrupt on MR0 (reset TC)                              */

    T0CCR         = 0;                                          /* Capture is disabled.                                     */
    T0EMR         = 0;                                          /* No external match output.                                */
    T0TCR         = 1;                                          /* Enable timer 0                                           */
}

/*
*********************************************************************************************************
*                                       Tmr_TickISR_Handler()
*
* Description : Handle the timer interrupt that is used to generate TICKs for uC/OS-II.
*
* Argument(s) : none.
*
* Return(s)   : none.
*********************************************************************************************************
*/

void  Tmr_TickISR_Handler (void)
{
    T0IR = 0xFF;                                                /* Clear timer #0 interrupt                                 */

    OSTimeTick();                                               /* Call uC/OS-II's OSTimeTick()                             */
}
/*
*********************************************************************************************************
*                                           BSP_IntDisAll()
*
* Description : Disable ALL interrupts.
*
* Argument(s) : none.
*
* Return(s)   : none.
*********************************************************************************************************
*/

void  BSP_IntDisAll (void)
{
    VICIntEnClr = 0xFFFFFFFFL;                                /* Disable ALL interrupts                                   */
}


/*
*********************************************************************************************************
*********************************************************************************************************
**                                          uC/LCD FUNCTIONS
*********************************************************************************************************
*********************************************************************************************************
*/
/*