求助，矩阵键盘（翻转法检测）一行或者一列读出的值是一样的！

gjnacoose

[mw_shl_code=c,true]uint8_t KeyScan(void) { uint8_t MKeyCord_h, MKeyCord_l, MKeyCord,i,temp; MKey_Port=0x0f; MKeyCord_h = MKey_Port & 0x0f; if(MKeyCord_h!=0x0f) { bsp_DelayMs(10); MKey_Port=0x0f; if((MKey_Port & 0x0f)!=0x0f) { MKeyCord_h = MKey_Port & 0x0f; bsp_Usart1Printf("MKeyCord_h is: %d\r\n",(int)MKeyCord_h); MKey_Port = MKeyCord_h | 0xf0; MKeyCord_l = MKey_Port & 0xf0; bsp_Usart1Printf("MKeyCord_l is: %d\r\n",(int)MKeyCord_l); MKeyCord = MKeyCord_l + MKeyCord_h; while((MKey_Port & 0xf0)!=0xf0); bsp_Usart1Printf("MKeyCord is: %d\r\n",(int)MKeyCord); switch(MKeyCord) { case 0xee: i = 0; break; case 0xed: i = 1; break; case 0xeb: i = 2; break; case 0xe7: i = 3; break; case 0xde: i = 4; break; case 0xdd: i = 5; break; case 0xdb: i = 6; break; case 0xd7: i = 7; break; case 0xbe: i = 8; break; case 0xbd: i = 9; break; case 0xbb: i = 10; break; case 0xb7: i = 11; break; case 0x7e: i = 12; break; case 0x7d: i = 13; break; case 0x7b: i = 14; break; case 0x77: i = 15; break; default : break; } } } return i; }[/mw_shl_code]

gjnacoose

代码已经贴出来，我是用的15系列单片机

正点原子

帮顶。。。。

zlkj

回复【2楼】gjnacoose:
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如果是总线方式，P0口不要接上拉电阻。