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 USB CDC (Communication Device Class) device and install
 * it like a Virtual COM port. The UART1 is used for physical implementation
 * of the RS232 port.
 *
 * 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"

/*************************************************************************
 * 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: 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)
{
Int8U Buffer[100];
pInt8U pBuffer;
Int32U Size,TranSize;

#if CDC_DEVICE_SUPPORT_LINE_CODING > 0
CDC_LineCoding_t CDC_LineCoding;
UartLineCoding_t UartLineCoding;
#endif // CDC_DEVICE_SUPPORT_LINE_CODING > 0

#if CDC_DEVICE_SUPPORT_LINE_STATE > 0

#if UART1_MODEM_STAT_ENA > 0
UartModemEvents_t     UartModemEvents;
UartModemLineState_t  UartModemLineState;
CDC_LineState_t CDC_LineState;
#endif // UART1_MODEM_STAT_ENA > 0

UartLineEvents_t      UartLineEvents;

SerialState_t   SerialState;
#endif // CDC_DEVICE_SUPPORT_LINE_STATE > 0

  // 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 UART 1
  UartInit(UART_1,4,NORM);

  // Init USB
  USB_Init(1,UsbCdcConfigure);

  // Init CDC
  UsbCdcInit(3);

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

    HD44780_PowerUpInit();
  // Show message on the LCD
  HD44780_StrShow(1, 1,  "  IAR Systems   ");
  HD44780_StrShow(1, 2,  "   CD Class     ");
  LCD_LIGHT_ON();

  while(1)
  {
    if (UsbCdcIsCdcConfigure())
    {
      // Data from USB
      Size = UsbCdcRead(Buffer,sizeof(Buffer)-1);
      if(Size)
      {
#ifdef DATA_LOGGING
        Buffer[Size] = 0;
        printf("> %s\n",Buffer);
#endif // DATA_LOGGING
        TranSize = 0;
        pBuffer = Buffer;
        do
        {
          Size -= TranSize;
          pBuffer += TranSize;
          TranSize = UartWrite(UART_1,pBuffer,Size);
        }
        while(Size != TranSize);
      }

      // Data from UART1
      Size = UartRead(UART_1,Buffer,sizeof(Buffer)-1);
      if(Size)
      {
#ifdef DATA_LOGGING
        Buffer[Size] = 0;
        printf("< %s\n",Buffer);
#endif  // DATA_LOGGING
        while(!UsbCdcWrite(Buffer,Size));
      }

      // Get line and modem events from UART
#if CDC_DEVICE_SUPPORT_LINE_STATE > 0
      // Get line events - BI, FE, PE, OE
      UartLineEvents = UartGetUartLineEvents(UART_1);
#if UART1_MODEM_STAT_ENA > 0
      // Get modem line events - RI, DCD and DSR
      UartModemEvents = Uart1GetUartModemEvents();
      if(UartLineEvents.Data || UartModemEvents.Data)
      {
        // Modem lines report - DCD, DSR and RI
        SerialState.bRxCarrier = UartModemEvents.bDCD;
        SerialState.bTxCarrier = UartModemEvents.bDSR;
        SerialState.bRingSignal = UartModemEvents.bDRI;
#else
      if(UartLineEvents.Data)
      {
        SerialState.Data = 0;
#endif // UART1_MODEM_STAT_ENA > 0
        // Line events report BI, PE, FE and OE
        SerialState.bBreak = UartLineEvents.bBI;
        SerialState.bFraming = UartLineEvents.bFE;
        SerialState.bOverRun = UartLineEvents.bOE;
        SerialState.bParity = UartLineEvents.bPE;
        // Send events
        UsbCdcReportSerialCommState(SerialState);
      }
#endif // CDC_DEVICE_SUPPORT_LINE_STATE > 0
    }

    // UART line coding - Baud rate, number of the stop bits,
    // number of bits of the data word and parity type
#if CDC_DEVICE_SUPPORT_LINE_CODING > 0
    if(UsbCdcIsNewLineCodingSettings())
    {
      CDC_LineCoding = UsbCdcGetLineCodingSettings();
      // Update the baud rate
      UartLineCoding.dwDTERate = CDC_LineCoding.dwDTERate;
      // Update the stop bits number
      UartLineCoding.bStopBitsFormat = CDC_LineCoding.bCharFormat?UART_TWO_STOP_BIT:UART_ONE_STOP_BIT;
      // Update the parity type
      UartLineCoding.bParityType = (CDC_LineCoding.bParityType == 0)?UART_NO_PARITY:(UartParity_t)(CDC_LineCoding.bParityType-1);
      // Update the word width
      UartLineCoding.bDataBits = (UartWordWidth_t)(CDC_LineCoding.bDataBits - 5);
      // Set UART line coding
      UartSetLineCoding(UART_1,UartLineCoding);
    }
#endif // CDC_DEVICE_SUPPORT_LINE_CODING > 0

    // Get line and modem events from USB
#if UART1_MODEM_STAT_ENA > 0 && CDC_DEVICE_SUPPORT_LINE_STATE > 0
    // Modem lines - DTR, RTS
    if(UsbCdcIsNewLineStateSettings())
    {
      CDC_LineState = UsbCdcGetLineStateSettings();
      UartModemLineState.bDTR = CDC_LineState.DTR_State;
      UartModemLineState.bRTS = CDC_LineState.RTS_State;
      Uart1SetModemLineState(UartModemLineState);
    }
#endif // UART1_MODEM_STAT_ENA > 0 && CDC_DEVICE_SUPPORT_LINE_STATE > 0

#if CDC_DEVICE_SUPPORT_BREAK > 0
    // Break event
    UartSetUartLineState(UART_1,UsbCdcGetBreakState());
#endif // CDC_DEVICE_SUPPORT_BREAK > 0
  }
}