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先上程序
- #include "reg51.h"
- //-----------------------------------------------
- /* define constants */
- #define FOSC 11059200L
- //#define MODE1T //Timer clock mode, comment this line is 12T mode, uncomment is 1T mode
- #ifdef MODE1T
- #define F38_4KHz (256-FOSC/2/38400) //38.4KHz frequency calculation method of 1T mode
- #else
- #define F38_4KHz (256-FOSC/2/12/38400) //38.4KHz frequency calculation method of 12T mode
- #endif
- /* define SFR */
- sfr AUXR = 0x8e; //Auxiliary register
- sfr WAKE_CLKO = 0x8f; //wakeup and clock output control register
- sbit T1CLKO = P1^1; //timer1 clock output pin
- //-----------------------------------------------
- /* main program */
- void main()
- {
- #ifdef MODE1T
- AUXR = 0x40; //timer1 work in 1T mode
- #endif
- TMOD = 0x20; //set timer1 as mode2 (8-bit auto-reload)
- TL1 = F38_4KHz; //initial timer1
- TH1 = F38_4KHz; //initial timer1
- TR1 = 1; //timer1 start running
- WAKE_CLKO = 0x02; //enable timer1 clock output
- while (1); //loop
- }
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