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我用的是SMARTARM2200的开发板，在连接LCD(192*64)调试时，按照硬件连接定义地址：<br />#define CWADD1 (*((volatile unsigned short *) 0x83800000)) //写指令代码地址(左)<br />#define CRADD1 (*((volatile unsigned short *) 0x83800002)) //读状态字地址(左)<br />#define DWADD1 (*((volatile unsigned short *) 0x83800004)) //写显示数据地址(左)<br />#define DRADD1 (*((volatile unsigned short *) 0x83800006)) //读显示数据地址(左)<br /><br /><br /><br />#define CWADD2 (*((volatile unsigned short *) 0x83800008)) //写指令代码地址(中)<br />#define CRADD2 (*((volatile unsigned short *) 0x8380000A)) //读状态字地址(中)<br />#define DWADD2 (*((volatile unsigned short *) 0x8380000C)) //写显示数据地址(中)<br />#define DRADD2 (*((volatile unsigned short *) 0x8380000E)) //读显示数据地址(中)<br /><br /><br /><br />#define CWADD3 (*((volatile unsigned short *) 0x83800010)) //写指令代码地址(右)<br />#define CRADD3 (*((volatile unsigned short *) 0x83800012)) //读状态字地址(右)<br />#define DWADD3 (*((volatile unsigned short *) 0x83800014)) //写显示数据地址(右)<br />#define DRADD3 (*((volatile unsigned short *) 0x83800016)) //读显示数据地址(右)<br /><br /><br />#define LCD_WriteCommand1(command) CWADD1 = (uint16)command<br />#define LCD_WriteCommand2(command) CWADD2 = (uint16)command<br />#define LCD_WriteCommand3(command) CWADD3 = (uint16)command<br />#define LCD_WriteData1(dat) DWADD1 = (uint16)dat<br />#define LCD_WriteData2(dat) DWADD2 = (uint16)dat<br />#define LCD_WriteData3(dat) DWADD3 = (uint16)dat<br /><br /> #define LCD_ReadState1() CRADD1<br /> #define LCD_ReadState2() CRADD2<br /> #define LCD_ReadState3() CRADD3<br /><br /><br /><br /> <br />当对LCD进行读写操作时，读写信号有输出，但片选信号 LCM_nCS1输出总是为高电平，而这个片选信号从CPLD译码输出的，按照开发板的资料，应该是输出地址后，片选信号LCM_nCS1输出为低电平，请问这个问题怎样解决？ |
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楼主
