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 17, 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 WEB server.
 *   The default IP address is:
 *    192.168.0.100
 *   The physical MAC address is (defined in uipopt.h):
 *    00-ff-ff-ff-ff-ff
 *
 * 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.
 *
 **************************************************************************
 * Copyright (c) 2001-2003, Adam Dunkels.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file is part of the uIP TCP/IP stack.
 *
 **************************************************************************
 *
 *    $Revision: 18137 $
 *
 **************************************************************************/
#include "includes.h"
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])

/*************************************************************************
 * 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 = 350; Dly100; Dly100--);
}

/*************************************************************************
 * Function Name: uip_log
 * Parameters: none
 *
 * Return: none
 *
 * Description: Events logging
 *
 *************************************************************************/
void uip_log (char *m)
{
  printf("uIP log message: %s\n", m);
}

/*************************************************************************
 * Function Name: main
 * Parameters: none
 *
 * Return: none
 *
 * Description: main
 *
 *************************************************************************/
int main(void)
{
unsigned int i;
uip_ipaddr_t ipaddr;
struct timer periodic_timer, arp_timer;

  // 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();

  // Sys timer init 1/100 sec tick
  clock_init(2);

  timer_set(&periodic_timer, CLOCK_SECOND / 2);
  timer_set(&arp_timer, CLOCK_SECOND * 10);

  // Initialize the ethernet device driver
  while(!tapdev_init());

  __enable_interrupt();

  // LCD Powerup init
  HD44780_PowerUpInit();
  // Show meassges on LCD
  HD44780_StrShow(1, 1,  "IAR Systems ARM ");
  HD44780_StrShow(1, 2,  " uIP WEB Server ");
  LCD_LIGHT_ON();

  // uIP web server
  // Initialize the uIP TCP/IP stack.
  uip_init();

  uip_ipaddr(ipaddr, 192,168,0,100);
  uip_sethostaddr(ipaddr);
  uip_ipaddr(ipaddr, 192,168,0,1);
  uip_setdraddr(ipaddr);
  uip_ipaddr(ipaddr, 255,255,255,0);
  uip_setnetmask(ipaddr);

  // Initialize the HTTP server.
  httpd_init();

  while(1)
  {
    uip_len = tapdev_read(uip_buf);
    if(uip_len > 0)
    {
      if(BUF->type == htons(UIP_ETHTYPE_IP))
      {
	      uip_arp_ipin();
	      uip_input();
	      /* If the above function invocation resulted in data that
	         should be sent out on the network, the global variable
	         uip_len is set to a value > 0. */
	      if(uip_len > 0)
        {
	        uip_arp_out();
	        tapdev_send(uip_buf,uip_len);
	      }
      }
      else if(BUF->type == htons(UIP_ETHTYPE_ARP))
      {
        uip_arp_arpin();
	      /* If the above function invocation resulted in data that
	         should be sent out on the network, the global variable
	         uip_len is set to a value > 0. */
	      if(uip_len > 0)
        {
	        tapdev_send(uip_buf,uip_len);
	      }
      }
    }
    else if(timer_expired(&periodic_timer))
    {
      timer_reset(&periodic_timer);
      for(i = 0; i < UIP_CONNS; i++)
      {
      	uip_periodic(i);
        /* If the above function invocation resulted in data that
           should be sent out on the network, the global variable
           uip_len is set to a value > 0. */
        if(uip_len > 0)
        {
          uip_arp_out();
          tapdev_send(uip_buf,uip_len);
        }
      }
#if UIP_UDP
      for(i = 0; i < UIP_UDP_CONNS; i++) {
        uip_udp_periodic(i);
        /* If the above function invocation resulted in data that
           should be sent out on the network, the global variable
           uip_len is set to a value > 0. */
        if(uip_len > 0) {
          uip_arp_out();
          tapdev_send();
        }
      }
#endif /* UIP_UDP */
      /* Call the ARP timer function every 10 seconds. */
      if(timer_expired(&arp_timer))
      {
        timer_reset(&arp_timer);
        uip_arp_timer();
      }
    }
  }
}