main.c

NXP LPC系列AMR7的开发程序源码（LCD

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2007
 *
 *    File name   : main.c
 *    Description : Main module
 *
 *    History :
 *    1. Date        : September 14, 2007
 *       Author      : Stanimir Bonev
 *       Description : Create
 *
 *   This example project shows how to use the IAR Embedded Workbench for ARM
 *  to develop code for the IAR LPC-2468 board.
 *   It implements a MMC/SD card drive. The first free drive letters will be
 *  used. For example, if your PC configuration includes two hard disk partitions
 *  (in C:\ and D:\) and a CD-ROM drive (in E:\), the memory card drive will
 *  appear as F:\.
 *  The LCD backlight will indicate drive activity.
 *
 * Jumpers:
 *  J5      - depending of power source
 *  ISP     - unfilled
 *  nRESET  - unfilled
 *  EINT0   - filled
 *
 * Note:
 *  After power-up the controller get clock from internal RC oscillator that
 * is unstable and may fail with J-Link auto detect, therefore adaptive clocking
 * should always be used. The adaptive clock can be select from menu:
 *  Project->Options..., section Debugger->J-Link/J-Trace  JTAG Speed - Adaptive.
 *
 *    $Revision: 18137 $
 **************************************************************************/
#include "includes.h"

#define TIMER0_TICK_PER_SEC   2
#define UPDATE_SHOW_DLY       ((Int32U)(0.5 * TIMER0_TICK_PER_SEC))

volatile Boolean TickFlag = FALSE;

#pragma location="USB_DMA_RAM"
#pragma data_alignment=4
__no_init Int8U Lun0Buffer[2048];

const Int8U HexToCharStr [] = "0123456789ABCDEF";

/*************************************************************************
 * Function Name: fiq_handler
 * Parameters: none
 *
 * Return: none
 *
 * Description: FIQ handler
 *
 *************************************************************************/
__fiq __arm void FIQ_Handler (void)
{
  while(1);
}

/*************************************************************************
 * Function Name: irq_handler
 * Parameters: none
 *
 * Return: none
 *
 * Description: IRQ handler
 *
 *************************************************************************/
__irq __arm void IRQ_Handler (void)
{
void (*interrupt_function)();
unsigned int vector;

  vector = VICADDRESS;     // Get interrupt vector.
  interrupt_function = (void(*)())vector;
  if(interrupt_function != NULL)
  {
    interrupt_function();  // Call vectored interrupt function.
  }
  else
  {
    VICADDRESS = 0;      // Clear interrupt in VIC.
  }
}

/*************************************************************************
 * Function Name: Timer0IntrHandler
 * Parameters: none
 *
 * Return: none
 *
 * Description: Timer 0 interrupt handler
 *
 *************************************************************************/
void Timer0IntrHandler (void)
{
  TickFlag = TRUE;
  // clear interrupt
  T0IR_bit.MR0INT = 1;
  VICADDRESS = 0;
}

/*************************************************************************
 * Function Name: VIC_Init
 * Parameters: void
 * Return: void
 *
 * Description: Initialize VIC
 *
 *************************************************************************/
void VIC_Init(void)
{
volatile unsigned long * pVecAdd, *pVecCntl;
int i;
  // Assign all interrupt channels to IRQ
  VICINTSELECT  =  0;
  // Disable all interrupts
  VICINTENCLEAR = 0xFFFFFFFF;
  // Clear all software interrupts
  VICSOFTINTCLEAR = 0xFFFFFFFF;
  // VIC registers can be accessed in User or privileged mode
  VICPROTECTION = 0;
  // Clear interrupt
  VICADDRESS = 0;

  // Clear address of the Interrupt Service routine (ISR) for vectored IRQs
  // and disable all vectored IRQ slots
  for(i = 0,  pVecCntl = &VICVECTPRIORITY0, pVecAdd = &VICVECTADDR0; i < 32; ++i)
  {
    *pVecCntl++ = *pVecAdd++ = 0;
  }
}

/*************************************************************************
 * Function Name: VIC_SetVectoredIRQ
 * Parameters:  void(*pIRQSub)()
 *              unsigned int VicIrqSlot
 *              unsigned int VicIntSouce
 *
 * Return: void
 *
 * Description:  Init vectored interrupts
 *
 *************************************************************************/
void VIC_SetVectoredIRQ(void(*pIRQSub)(), unsigned int Priority,
                        unsigned int VicIntSource)
{
unsigned long volatile *pReg;
  // load base address of vectored address registers
  pReg = &VICVECTADDR0;
  // Set Address of callback function to corresponding Slot
  *(pReg+VicIntSource) = (unsigned long)pIRQSub;
  // load base address of ctrl registers
  pReg = &VICVECTPRIORITY0;
  // Set source channel and enable the slot
  *(pReg+VicIntSource) = Priority;
  // Clear FIQ select bit
  VICINTSELECT &= ~(1<<VicIntSource);
}

/*************************************************************************
 * Function Name: InitClock
 * Parameters: void
 * Return: void
 *
 * Description: Initialize PLL and clocks' dividers. Hclk - 288MHz,
 * Cclk- 48MHz, Usbclk - 48MHz
 *
 *************************************************************************/
void InitClock(void)
{
  // 1. Init OSC
  SCS_bit.OSCRANGE = 0;
  SCS_bit.OSCEN = 1;
  // 2.  Wait for OSC ready
  while(!SCS_bit.OSCSTAT);
  // 3. Disconnect PLL
  PLLCON_bit.PLLC = 0;
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
  // 4. Disable PLL
  PLLCON_bit.PLLE = 0;
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
  // 5. Select source clock for PLL
  CLKSRCSEL_bit.CLKSRC = 1; // Selects the main oscillator as a PLL clock source.
  // 6. Set PLL settings 288 MHz
  PLLCFG_bit.MSEL = 24-1;
  PLLCFG_bit.NSEL = 2-1;
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
  // 7. Enable PLL
  PLLCON_bit.PLLE = 1;
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
  // 8. Wait for the PLL to achieve lock
  while(!PLLSTAT_bit.PLOCK);
  // 9. Set clk divider settings
  CCLKCFG   = 6-1;            // 1/6 Fpll - 48 MHz, Regarding Errata Flash.1
  USBCLKCFG = 6-1;            // 1/6 Fpll - 48 MHz
  PCLKSEL0 = PCLKSEL1 = 0;    // other peripherals - 12MHz (Fcclk/4)
  // 10. Connect the PLL
  PLLCON_bit.PLLC = 1;
  PLLFEED = 0xAA;
  PLLFEED = 0x55;
}

/*************************************************************************
 * Function Name: SYS_GetFsclk
 * Parameters: none
 * Return: Int32U
 *
 * Description: return Sclk [Hz]
 *
 *************************************************************************/
Int32U SYS_GetFsclk(void)
{
Int32U Mul = 1, Div = 1, Osc, Fsclk;
  if(PLLSTAT_bit.PLLC)
  {
    // when PLL is connected
    Mul = PLLSTAT_bit.MSEL + 1;
    Div = PLLSTAT_bit.NSEL + 1;
  }

  // Find clk source
  switch(CLKSRCSEL_bit.CLKSRC)
  {
  case 0:
    Osc = I_RC_OSC_FREQ;
    break;
  case 1:
    Osc = MAIN_OSC_FREQ;
    break;
  case 2:
    Osc = RTC_OSC_FREQ;
    break;
  default:
    Osc = 0;
  }
  // Calculate system frequency
  Fsclk = Osc*Mul*2;
  Fsclk /= Div*(CCLKCFG+1);
  return(Fsclk);
}

/*************************************************************************
 * Function Name: SYS_GetFpclk
 * Parameters: Int32U Periphery
 * Return: Int32U
 *
 * Description: return Pclk [Hz]
 *
 *************************************************************************/
Int32U SYS_GetFpclk(Int32U Periphery)
{
Int32U Fpclk;
pInt32U pReg = (pInt32U)((Periphery < 32)?&PCLKSEL0:&PCLKSEL1);

  Periphery  &= 0x1F;   // %32
  Fpclk = SYS_GetFsclk();
  // find peripheral appropriate periphery divider
  switch((*pReg >> Periphery) & 3)
  {
  case 0:
    Fpclk /= 4;
    break;
  case 1:
    break;
  case 2:
    Fpclk /= 2;
    break;
  default:
    Fpclk /= 8;
  }
  return(Fpclk);
}

/*************************************************************************
 * Function Name: GpioInit
 * Parameters: void
 * Return: void
 *
 * Description: Reset all GPIO pins to default: primary function
 *
 *************************************************************************/
void GpioInit(void)
{
  // Set to inputs
  IO0DIR  = \
  IO1DIR  = \
  FIO0DIR = \
  FIO1DIR = \
  FIO2DIR = \
  FIO3DIR = \
  FIO4DIR = 0;

  // Enable Fast GPIO0,1
  SCS_bit.GPIOM = 1;

  // clear mask registers
  FIO0MASK =\
  FIO1MASK =\
  FIO2MASK =\
  FIO3MASK =\
  FIO4MASK = 0;

  // Reset all GPIO pins to default primary function
  PINSEL0 =\
  PINSEL1 =\
  PINSEL2 =\
  PINSEL3 =\
  PINSEL4 =\
  PINSEL5 =\
  PINSEL6 =\
  PINSEL7 =\
  PINSEL8 =\
  PINSEL9 =\
  PINSEL10= 0;
}

/*************************************************************************
 * Function Name: Dly100us
 * Parameters: void *arg
 * Return: void
 *
 * Description: Delay [100us]
 *		
 *************************************************************************/
void Dly100us(void *arg)
{
volatile Int32U Dly = (Int32U)arg, Dly100;
  for(;Dly;Dly--)
    for(Dly100 = 500; Dly100; Dly100--);
}

/*************************************************************************
 * Function Name: main
 * Parameters: none
 *
 * Return: none
 *
 * Description: main
 *
 *************************************************************************/
int main(void)
{
Int32U Dly = UPDATE_SHOW_DLY;
DiskStatusCode_t StatusHold = (DiskStatusCode_t) -1;
Int8U Message[17];
Int32U Tmp, Tmp1;
Boolean nZerro;

  // MAM init
  MAMCR_bit.MODECTRL = 0;
  MAMTIM_bit.CYCLES = 3;    // FCLK > 40 MHz
  MAMCR_bit.MODECTRL = 2;   // MAM functions fully enabled

  // Init clock
  InitClock();
  // Init GPIO
  GpioInit();
  // Init VIC
  VIC_Init();

  // Init Time0
  PCONP_bit.PCTIM0 = 1; // Enable TMR0 clk
  T0TCR_bit.CE = 0;     // counting  disable
  T0TCR_bit.CR = 1;     // set reset
  T0TCR_bit.CR = 0;     // release reset
  T0CTCR_bit.CTM = 0;   // Timer Mode: every rising PCLK edge
  T0MCR_bit.MR0I = 1;   // Enable Interrupt on MR0
  T0MCR_bit.MR0R = 1;   // Enable reset on MR0
  T0MCR_bit.MR0S = 0;   // Disable stop on MR0
  // set timer 0 period
  T0PR = 0;
  T0MR0 = SYS_GetFpclk(TIMER0_PCLK_OFFSET)/(TIMER0_TICK_PER_SEC);
  // init timer 0 interrupt
  T0IR_bit.MR0INT = 1;  // clear pending interrupt
  VIC_SetVectoredIRQ(Timer0IntrHandler,0,VIC_TIMER0);
  VICINTENABLE |= 1UL << VIC_TIMER0;
  T0TCR_bit.CE = 1;     // counting Enable

  // Init USB
  USB_Init(1,UsbClassBotConfigure);

  // Init SCSI module
  ScsiInit();

  // LUNs Init
  LunInit(MMC_DISK_LUN,MmcDiskInit,MmcDiskInfo,MmcGetDiskCtrlBkl,MmcDiskIO);

  __enable_interrupt();
  // Soft connection enable
  USB_ConnectRes(TRUE);

  // LCD Powerup init
  HD44780_PowerUpInit();
  // Show meassges on LCD
  HD44780_StrShow(1, 1,  "IAR Systems ARM ");
  HD44780_StrShow(1, 2,  "USB Mass Storage");

  while(1)
  {
    for(Int32U i = 0; i < SCSI_LUN_NUMB; i++)
    {
      // Implement LUNs messages
      if(LunImp(i))
      {
        LCD_LIGHT_ON();
      }
      else
      {
        LCD_LIGHT_OFF();
      }
    }
    if (TickFlag)
    {
      TickFlag = 0;
      // Update MMC/SD card status
      MmcStatusUpdate();
      if(Dly-- == 0)
      {
        // LCD show
        Dly = UPDATE_SHOW_DLY;
        // Current state of MMC/SD show
        pDiskCtrlBlk_t pMMCDiskCtrlBlk = MmcGetDiskCtrlBkl();
        if(StatusHold != pMMCDiskCtrlBlk->DiskStatus)
        {

          StatusHold = pMMCDiskCtrlBlk->DiskStatus;
          switch (pMMCDiskCtrlBlk->DiskStatus)
          {
          case DiskCommandPass:
            switch(pMMCDiskCtrlBlk->DiskType)
            {
            case DiskMMC:
              strcpy((char*)Message,"MMC Card - ");
              break;
            case DiskSD:
              strcpy((char*)Message,"SD Card - ");
              break;
            default:
              strcpy((char*)Message,"Card - ");
            }
            // Calculate MMC/SD size [MB]
            Tmp  = pMMCDiskCtrlBlk->BlockNumb * pMMCDiskCtrlBlk->BlockSize;
            Tmp  = Tmp/1000000;
            Tmp1 = Tmp/1000;
            nZerro = FALSE;
            if(Tmp1)
            {
              Message[strlen((char*)Message)+1] = 0;
              Message[strlen((char*)Message)]   = HexToCharStr[Tmp1];
              Tmp %= 1000;
              nZerro = TRUE;
            }
            Tmp1 = Tmp/100;
            if(Tmp1 || nZerro)
            {
              Message[strlen((char*)Message)+1] = 0;
              Message[strlen((char*)Message)]   = HexToCharStr[Tmp1];
              Tmp %= 100;
              nZerro = TRUE;
            }
            Tmp1 = Tmp/10;
            if(Tmp1 || nZerro)
            {
              Message[strlen((char*)Message)+1] = 0;
              Message[strlen((char*)Message)]   = HexToCharStr[Tmp1];
              Tmp %= 10;
              nZerro = TRUE;
            }
            if(Tmp || nZerro)
            {
              Message[strlen((char*)Message)+1] = 0;
              Message[strlen((char*)Message)]   = HexToCharStr[Tmp];
            }
            strcat((char*)Message,"MB");
            for(Int32U i = strlen((char*)Message); i < 16; ++i)
            {
              Message[i] = ' ';
            }
            Message[strlen((char*)Message)+1] = 0;
            break;
          default:
            strcpy((char*)Message,"Pls, Insert Card");
          }
          HD44780_StrShow(1, 2, (pInt8S)Message);
        }
      }
    }
  }
}