在wince6的BSP中,IIC初始化程序将GPIO配置注释掉了,如下
// setup GPIO for I2C
// rGPEUP &= ~0xc000; //Pull-up disable
// rGPEUP |= 0xc000; //pull-ups disable
// rGPECON &= ~(0xF<<28);
// rGPECON |= (0xA << 28); //GPE15:IICSDA, GPE14:IICSCL
有个疑问,如果不讲GPIO口屏蔽掉,如何保证系统将该口用作IIC?