c8051f300定时器

#include <c8051f300.h>                    // SFR declarations

//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F30x
//-----------------------------------------------------------------------------

sfr16 DP       = 0x82;                    // data pointer
sfr16 TMR2RL   = 0xca;                    // Timer2 reload value
sfr16 TMR2     = 0xcc;                    // Timer2 counter
sfr16 PCA0CP1  = 0xe9;                    // PCA0 Module 1 Capture/Compare
sfr16 PCA0CP2  = 0xeb;                    // PCA0 Module 2 Capture/Compare
sfr16 PCA0     = 0xf9;                    // PCA0 counter
sfr16 PCA0CP0  = 0xfb;                    // PCA0 Module 0 Capture/Compare

//-----------------------------------------------------------------------------
// Global CONSTANTS
//-----------------------------------------------------------------------------

#define SYSCLK       24500000 / 8         // SYSCLK frequency in Hz

sbit LED = P0^2;                          // LED='1' means ON
sbit SW2 = P0^3;                          // SW2='0' means switch pressed

//-----------------------------------------------------------------------------
// Function PROTOTYPES
//-----------------------------------------------------------------------------
void SYSCLK_Init (void);
void PORT_Init (void);
void Timer2_Init (int counts);
void Timer2_ISR (void);