(转)LPC2368一些基本测试程序2 TargetResetInit

只看该作者 · 2009-10-14 16:47

void TargetResetInit(void)
{
#ifdef __DEBUG_RAM
   MEMMAP = 0x2;                   // remap
#endif
#ifdef __DEBUG_FLASH
   MEMMAP = 0x1;                   // remap
#endif
#ifdef __IN_CHIP
   MEMMAP = 0x1;                   // remap
#endif

if ( PLLSTAT & (1 << 25) ) // if the PLL was connected
{
  PLLCON  = 0x01;
  PLLFEED = 0xAA;    // disconnect the PLL
  PLLFEED = 0x55;
  PLLCON  = 0x00;
  PLLFEED = 0xAA;    // disable the PLL
  PLLFEED = 0x55;
}
else if ( PLLSTAT & (1 << 24) ) // if the PLL was enabled                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                // 如果PLL已被使能,则先禁止PLL
{
  PLLCON  = 0x00;
  PLLFEED = 0xAA;    // disable the PLL
  PLLFEED = 0x55;
}

SCS |= 0x20;    // Enable the main OSC,,1MHz～20MHz
while( !(SCS & 0x40) );    // Wait until main OSC is usable

PLLCON = 1;       // Enable but disconnect the PLL
CLKSRCSEL = 0x01;    // select main OSC as the PLL clock source
PLLCFG  = ( ( (PLL_NValue-1) << 16)  | (PLL_MValue-1) ); // set the PLLCFG
PLLFEED = 0xAA;    // Enable PLL
PLLFEED = 0x55;
while (((PLLSTAT & (1 << 24)) == 0)); // Wait until the PLL is usable
CCLKCFG = (Fcco/Fcclk - 1); // set the CCLKCFG
  PLLCON = 3;       // connect the PLL
PLLFEED = 0xAA;
PLLFEED = 0x55;
while (((PLLSTAT & (3 << 25)) == 0)); // Wait until the PLL is connected and locked
#if USE_USB
   PCONP |= 0x80000000; // Turn On the USB PCLK
   USBCLKCFG = (Fcco/Fusbclk - 1);
#endif
// Set system timers for each component
#if (Fpclk / (Fcclk / 4)) == 1
   PCLKSEL0 = 0x00000000; // PCLK is 1/4 CCLK
   PCLKSEL1 = 0x00000000;
#endif
#if (Fpclk / (Fcclk / 4)) == 2
   PCLKSEL0 = 0xAAAAAAAA; // PCLK is 1/2 CCLK
   PCLKSEL1 = 0xAAAAAAAA;
#endif
#if (Fpclk / (Fcclk / 4)) == 4
   PCLKSEL0 = 0x55555555; // PCLK is the same as CCLK
   PCLKSEL1 = 0x55555555;
#endif

// Set memory accelerater module
   MAMCR = 0;
#if Fcclk < 20000000
   MAMTIM = 1;
#else
#if Fcclk < 40000000
   MAMTIM = 2;
#else
   MAMTIM = 3;
#endif
#endif
   MAMCR = 2;
/* Initialize VIC*/
VICIntEnClr = 0xffffffff;
VICVectAddr = 0;

/* Add your codes here */
return;
}

重点在于启动主晶振
SCS |= 0x20;    // Enable the main OSC,,1MHz～20MHz
while( !(SCS & 0x40) );    // Wait until main OSC is usable

只看该作者 · 2009-10-14 16:48

LPC2368一些基本测试程序1 IRQ.c
/*****************************************************************************************************
//函数名：uint32 install_irq( uint32 IntNumber, void *HandlerAddr, uint32 Priority )
//描述  ：
//参数  ：
//返回  ：
//其他  ：
********************************************************************************************************/
uint32 install_irq( uint32 IntNumber, void *HandlerAddr, uint32 Priority )
{
uint32 *vect_addr;
uint32 *vect_cntl;

VICIntEnClr = 1 << IntNumber; /// Disable Interrupt
if ( IntNumber >= VIC_SIZE )
{
  return ( FALSE );
}
else
{
  // find first un-assigned VIC address for the handler
  vect_addr = (uint32 *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + IntNumber*4);
  vect_cntl = (uint32 *)(VIC_BASE_ADDR + VECT_CNTL_INDEX + IntNumber*4);
  *vect_addr = (uint32)HandlerAddr; // set interrupt vector
  *vect_cntl = Priority;
  VICIntEnable = 1 << IntNumber; // Enable Interrupt
  return( TRUE );
}
}

和LPC21xx不同，LPC2368的vic的vect_addr 和中断号码是一样对应的。

只看该作者 · 2009-10-14 16:59

呵呵，谢谢楼上，辛苦了！:P

只看该作者 · 2009-10-15 09:36

楼主辛苦了，不过程序的注释要是再详细点就更好了

1万 · 2009-10-16 19:21

应该说明一下程序的作用。。。

(转)LPC2368一些基本测试程序2 TargetResetInit

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