CY7C63813USB微控制器的编程问题请教

只看该作者 · 2012-2-8 11:20

最近在学习CY7C63813USB微控制器，实现HID键盘设备，以下程序实现联机时自动给PC机一次PAGEDOWN按键的信号（0X5D）,实测时发现PC机一直在接收PAGEDOWN信号,这是为什么呢?明明我就发送了一次?
....
BYTE KeyData[8] = {0,0,0x5b,0,0,0,0,0};
....
M8C_EnableGInt; //Enable Global Interrupts
USB_1_Start(0); //Start USB Operation using device 0
while (!USB_1_bGetConfiguration()); //Wait for Device to enumerate
for (y1=0;y1<100;y1++)//must delay some time!!!
delay();
  USB_1_LoadEP (1, KeyData, 8); //Begin initial USB transfers
while (!USB_1_bGetEPAckState (1)); //Check and see if ACK has occured
while(1);
.....

用BUS HOUND监听数据发现如下内容：
  36.1  IN    00 00 5b 00  00 00 00 00  ..[.....             1374.1.0
  37 IN    0d 00 51 00  00 00 00 00  ..Q.....             1375.1.0(3227)