用两块74hc595 驱动一个8x8的点阵

Mr_Head

[mw_shl_code=c,true]#include<reg52.h> #include <intrins.h> unsigned char segout[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //8?? unsigned char code tab[]={ 0x00,0x6C,0x92,0x82,0x44,0x28,0x10,0x00}; sbit LATCH = P2^1; sbit SRCLK= P2^2; sbit SER = P2^0; sbit LATCH_B = P2^4; //595 11引脚 sbit SRCLK_B= P2^5; //595 12 sbit SER_B= P2^3; //595 14 void DelayUs2x(unsigned char t) { while(--t); } void DelayMs(unsigned char t) { while(t--) { //?ó?????±1mS DelayUs2x(245); DelayUs2x(245); } } void SendByte(unsigned char dat) { unsigned char i; for(i=0;i<8;i++) { SRCLK=0; SER=dat&0x80; dat<<=1; SRCLK=1; } } void Out595(void) { LATCH=1; DelayMs(1); LATCH=0; } void SendSeg(unsigned char dat) { unsigned char i; for(i=0;i<8;i++) //·???×??? { SRCLK_B=0; SER_B=dat&0x80; dat<<=1; SRCLK_B=1; } LATCH_B=1; //???? DelayMs(1); LATCH_B=0; } /*------------------------------------------------ ?÷???ò ------------------------------------------------*/ void main() { unsigned char i; while(1) { for(i=0;i<8;i++) //8?????? { SendSeg(~segout); SendByte(tab); Out595(); } } } [/mw_shl_code]

仿真以后是这样，为什么右边那个595没有输出呢？

lycreturn

不是有输出么, 输出全低

Mr_Head

回复【2楼】lycreturn:
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但是我设置的输出并不是低啊。。。