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0六个595驱动点阵 请教大家 为什么最后一列总是有点乱 这是显示三列 这是显示两列 这是显示一列,怎么还重复了。 这是显示四列 代码是这样的 #include<stc15.h> sbit Data = P2^0; sbit OE =P2^3; sbit L_STB = P2^1; sbit L_CLK= P2^2; unsigned char code ROW_NUM[] = { 0x80, 0x00, 0x40, 0x00, 0x20, 0x00, 0x10, 0x00, 0x08, 0x00, 0x04, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x80, 0x00, 0x40, 0x00, 0x20, 0x00, 0x10, 0x00, 0x08, 0x00, 0x04, 0x00, 0x02, 0x00, 0x01, }; unsigned char code a[][16] ={ {0x01,0x01,0x3F,0x01,0x1F,0x02,0xFF,0x04,0x08,0x3F,0xC8,0
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074hc595驱动led用不用加限流电阻
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8这里告诉你,不需要加限流电阻!!
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1#include ".\SPI_HC595\SPI_HC595.h" //引用头文件 /******************************************************************************** **函数名称:void myDelay (INT32U ulTime) **函数功能:延时 **入口参数:ulTime **出口参数:无 ********************************************************************************/ void myDelay (INT32U ulTime) { INT32U i; i = 0; while (ulTime--) { for (i = 0; i < 5000; i++); } } /******************************************************************************** **函数名称:int main(void) **函数功能:主函数,控制数码
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074hc595是硅结构的CMOS器件, 兼容低电压TTL电路,遵守JEDEC NO.7A标准。74HC595具有8位移位寄存器和一个存储器,三态输出功能。 移位寄存器和存储器有相互独立的时钟。数据在SH_cp(移位寄存器时钟输入)的上升沿输入到移位寄存器中,在ST_cp(存储器时钟输入)的上升沿输入到存储寄存器中去。如果两个时钟连在一起,则移位寄存器总是比存储寄存器早一个脉冲。移位寄存器有一个串行移位输入(Ds),和一个串行输出(Q7’),和一个异步的低电平复位
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5如题………会员太少了!
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1有没有595的资料或者视频吗?求分享。。。。。。。。