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发表于 2013-4-21 08:43:31
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Huangwenfeng 发表于 2013-4-21 07:07 ![](static/image/common/back.gif)
哦哦,谢谢啦!能帮忙修改下不!嘻嘻
参考这个代码- /* BLINKY.C - LED Flasher for the Keil MCBx51 Evaluation Board with 80C51 device*/
- #include <REG8252.H>
- // When you have enabled the option Stop Program Execution with Serial
- // Interrupt, the Monitor-51 uses the serial interrupt of the UART.
- // It is therefore required to reserve the memory locations for the interrupt
- // vector. You can do this by adding one of the following code lines:
- // char code reserve [3] _at_ 0x23; // when using on-chip UART for communication
- // char code reserve [3] _at_ 0x3; // when using off-chip UART for communication
- void wait (void) { /* wait function */
- ; /* only to delay for LED flashes */
- }
- void main (void) {
- unsigned int i; /* Delay var */
- unsigned char j; /* LED var */
- while (1) { /* Loop forever */
- for (j=0x01; j< 0x80; j<<=1) { /* Blink LED 0, 1, 2, 3, 4, 5, 6 */
- P1 = j;
- /* Output to LED Port */
- for (i = 0; i < 10000; i++) { /* Delay for 10000 Counts */
- wait (); /* call wait function */
- }
- }
- for (j=0x80; j> 0x01; j>>=1) { /* Blink LED 6, 5, 4, 3, 2, 1 */
- P1 = j; /* Output to LED Port */
- for (i = 0; i < 10000; i++) { /* Delay for 10000 Counts */
- wait (); /* call wait function */
- }
- }
- }
- }
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