本帖最后由 s700 于 2011-9-24 13:50 编辑
芯片是LPC2368, 其中P2.0--P2.7各接上一个led，高电平点亮，即是端口输出‘1’，相应led亮。
写了一个跑马灯的程序，但是系统没一点反应，下载程序到目标板后Keil显示正常，显示如下：
Erase Done.
Programming Done.
Verify OK.
Application running ...
我运用keil写的程序，启动代码采用Keil自带的LPC2300.s。个人感觉是上电芯片未启动的问题，不知道是否正确，希望各位大神指点一下，谢过了。
程序如下：
#include "lpc23xx.h"
typedef unsigned long DWORD;
typedef char BYTE;
#define I_Bit 0x80
#define F_Bit 0x40
#define VIC_SIZE 32
#define TIMER0_INT 4
#define SYS32Mode 0x1F
#define IRQ32Mode 0x12
#define FIQ32Mode 0x11
#define FALSE 0
#define TRUE 1
#define HIGHEST_PRIORITY 0x01
#define LOWEST_PRIORITY 0x0F
#define VECT_ADDR_INDEX 0x100
#define VECT_PRIO_INDEX 0x200
#define Fcclk 48000000
#define Fpclk (Fcclk / 2)
#define TIME_INTERVAL (Fpclk/100 - 1)
static DWORD sysreg;
#define IENABLE __asm { MRS sysreg, SPSR; MSR CPSR_c, #SYS32Mode }
#define IDISABLE __asm { MSR CPSR_c, #(IRQ32Mode|I_Bit); MSR SPSR_cxsf, sysreg }
volatile DWORD timer0_counter;
void Timer0Handler (void) __irq
{
T0IR = 1;
IENABLE;
timer0_counter++;
IDISABLE;
VICVectAddr = 0;
}
DWORD install_irq( DWORD IntNumber, void *HandlerAddr, DWORD Priority )
{
DWORD *vect_addr;
DWORD *vect_prio;
VICIntEnClr = 1 << IntNumber; /* Disable Interrupt */
if ( IntNumber >= VIC_SIZE )
{
return ( FALSE );
}
else
{
vect_addr = (DWORD *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + IntNumber*4);
vect_prio = (DWORD *)(VIC_BASE_ADDR + VECT_PRIO_INDEX + IntNumber*4);
*vect_addr = (DWORD)HandlerAddr;
*vect_prio = Priority;
VICIntEnable = 1 << IntNumber;
return( TRUE );
}
}
DWORD init_timer ( BYTE timer_num, DWORD TimerInterval )
{
if ( timer_num == 0 )
{
timer0_counter = 0;
T0MR0 = TimerInterval;
T0MCR = 3;
if ( install_irq( TIMER0_INT, (void *)Timer0Handler, HIGHEST_PRIORITY ) == FALSE )
{
return (FALSE);
}
else
{
return (TRUE);
}
}
return (FALSE);
}
#define FAST_PORT 0x01
#define REGULAR_PORT 0x02
#define DIR_OUT 0x01
#define DIR_IN 0x02
#define HS_PORT_DIR_BASE FIO_BASE_ADDR + 0x00
#define HS_PORT_DIR_INDEX 0x20
#define GPIOM 0x00000001
void GPIOInit( DWORD PortNum, DWORD PortType, DWORD PortDir )
{
if ( (PortType == FAST_PORT) && (PortNum == 2))
{
if ( (PortNum == 0) || (PortNum == 1) )
{
SCS |= GPIOM;
}
if ( PortDir == DIR_OUT )
{
(*(volatile unsigned long *)(HS_PORT_DIR_BASE
+ PortNum * HS_PORT_DIR_INDEX)) = 0xFFFFFFFF;
}
else
{
(*(volatile unsigned long *)(HS_PORT_DIR_BASE
+ PortNum * HS_PORT_DIR_INDEX)) = 0x00000000;
}
}
return;
}
#define PLL_MValue 11
#define PLL_NValue 0
#define CCLKDivValue 5
#define USBCLKDivValue 5
void ConfigurePLL ( void )
{
DWORD MValue, NValue;
if ( PLLSTAT & (1 << 25) )
{
PLLCON = 1;
PLLFEED = 0xaa;
PLLFEED = 0x55;
}
PLLCON = 0;
PLLFEED = 0xaa;
PLLFEED = 0x55;
SCS |= 0x20;
while( !(SCS & 0x40) );
CLKSRCSEL = 0x1;
PLLCFG = PLL_MValue | (PLL_NValue << 16);
PLLFEED = 0xaa;
PLLFEED = 0x55;
PLLCON = 1;
PLLFEED = 0xaa;
PLLFEED = 0x55;
CCLKCFG = CCLKDivValue;
#if USE_USB
USBCLKCFG = USBCLKDivValue;
#endif
while ( ((PLLSTAT & (1 << 26)) == 0) );
MValue = PLLSTAT & 0x00007FFF;
NValue = (PLLSTAT & 0x00FF0000) >> 16;
while ((MValue != PLL_MValue) && ( NValue != PLL_NValue) );
PLLCON = 3;
PLLFEED = 0xaa;
PLLFEED = 0x55;
while ( ((PLLSTAT & (1 << 25)) == 0) );
return;
}
void enable_timer( BYTE timer_num )
{
if ( timer_num == 0 )
{
T0TCR = 1;
}
else
{
T1TCR = 1;
}
return;
}
void GPIOResetInit( void )
{
PINSEL0 = 0x00000000;
PINSEL1 = 0x00000000;
PINSEL2 = 0x00000000;
PINSEL3 = 0x00000000;
PINSEL4 = 0x00000000;
PINSEL5 = 0x00000000;
PINSEL6 = 0x00000000;
PINSEL7 = 0x00000000;
PINSEL8 = 0x00000000;
PINSEL9 = 0x00000000;
PINSEL10 = 0x00000000;
IODIR0 = 0x00000000;
IODIR1 = 0x00000000;
IOSET0 = 0x00000000;
IOSET1 = 0x00000000;
FIO0DIR = 0x00000000;
FIO1DIR = 0x00000000;
FIO2DIR = 0x00000000;
FIO3DIR = 0x00000000;
FIO4DIR = 0x00000000;
FIO0SET = 0x00000000;
FIO1SET = 0x00000000;
FIO2SET = 0x00000000;
FIO3SET = 0x00000000;
FIO4SET = 0x00000000;
return;
}
void init_VIC(void)
{
DWORD i = 0;
DWORD *vect_addr, *vect_prio;
VICIntEnClr = 0xffffffff;
VICVectAddr = 0;
VICIntSelect = 0;
for ( i = 0; i < VIC_SIZE; i++ ) {
vect_addr = (DWORD *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + i*4); vect_prio = (DWORD *)(VIC_BASE_ADDR + VECT_PRIO_INDEX + i*4);
*vect_addr = 0x0;
*vect_prio = 0xF;
}
return;
}
void TargetResetInit(void)
{
#ifdef __DEBUG_RAM
MEMMAP = 0x2;
#endif
#ifdef __DEBUG_FLASH
MEMMAP = 0x1;
#endif
#if USE_USB
PCONP |= 0x80000000;
#endif
ConfigurePLL();
#if (Fpclk / (Fcclk / 4)) == 1
PCLKSEL0 = 0x00000000;
PCLKSEL1 = 0x00000000;
#endif
#if (Fpclk / (Fcclk / 4)) == 2
PCLKSEL0 = 0xAAAAAAAA;
PCLKSEL1 = 0xAAAAAAAA;
#endif
#if (Fpclk / (Fcclk / 4)) == 4
PCLKSEL0 = 0x55555555;
PCLKSEL1 = 0x55555555;
#endif
MAMCR = 0;
#if Fcclk < 20000000
MAMTIM = 1;
#else
#if Fcclk < 40000000
MAMTIM = 2;
#else
MAMTIM = 3;
#endif
#endif
MAMCR = 2;
GPIOResetInit();
init_VIC();
return;
}
int main(void)
{
DWORD counter;
init_timer( 0, TIME_INTERVAL );
GPIOInit( 2, FAST_PORT, DIR_OUT );
enable_timer( 0 );
counter = 0;
FIO2SET = 1 << counter;
while(1)
{
if ( timer0_counter >= (0x20 * counter) )
{
FIO2SET = 1 << counter;
counter++;
if ( counter > 8 )
{
counter = 0;
timer0_counter = 0;
FIO2CLR = 0x000000FF;
}
}
}
return 0;
} |
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