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2812--XINTF奇怪问题！<br /><br />使用2812的XINTF扩展几个外设，用到XZCS0AND1,XZCS2,于是开了一个最小系统板，编写了1个简单的测试程序，测试发现XZCS0AND1,XZCS2都没有片选信号输出！<br /><br /><br />同样的程序在开发板上运行，XZCS0AND1,XZCS2片选信号输出正常！<br /><br />程序如下：<br />unsigned int * LED_PORT = (unsigned int *) 0x234c;//0x434c;<br />unsigned int * Z2_PORT = (unsigned int *) 0x80000;//0x434c;<br /><br /> for(;<br /> {<br /> * LED_PORT=1;<br /> * Z2_PORT=0;<br /> KickDog();<br /> }<br /><br />配置程序如下:<br /> XintfRegs.XINTCNF2.bit.XTIMCLK = 0x0000;<br /> <br /> XintfRegs.XTIMING0.bit.USEREADY = 0; <br /> XintfRegs.XTIMING0.bit.X2TIMING = 0;<br /> XintfRegs.XTIMING0.bit.XSIZE = 3;<br /> XintfRegs.XTIMING0.bit.XRDLEAD =1; XintfRegs.XTIMING0.bit.XWRLEAD = 1;<br /> XintfRegs.XTIMING0.bit.XWRTRAIL = 1;<br /> XintfRegs.XTIMING0.bit.XRDTRAIL = 1;<br /> XintfRegs.XTIMING0.bit.XWRACTIVE = 7;<br /> XintfRegs.XTIMING0.bit.XRDACTIVE = 7; <br /><br />请教出现这种问题是什么原因造成的，是不是电路有问题？问题在那里？ |
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