TaeHo KIM
Newbie level 1
This is TaeHo who lives in South Korea.
Thesedays i am developing a data acquisition board wiht PXA255 and ISP1581.
Now, I can write a data to USB with bulk mode but I cann't read any data from ISP1581. When I command a just 2byte read, ISP1581 doesn't send ack. But I set endpoint1(IN) like this =>
ISP_ENDPOINT_INDEX = 3(Teaching endpoint 1 IN),
ISP_DATA_PORT = 0x1234( Write TX FIFO 2byte data),
ISP_CONTROL_FUNTION = 0x80(Set Validate Endpoint).
What do I have to do ? What is my mistake? Please give me advice.............
Thesedays i am developing a data acquisition board wiht PXA255 and ISP1581.
Now, I can write a data to USB with bulk mode but I cann't read any data from ISP1581. When I command a just 2byte read, ISP1581 doesn't send ack. But I set endpoint1(IN) like this =>
ISP_ENDPOINT_INDEX = 3(Teaching endpoint 1 IN),
ISP_DATA_PORT = 0x1234( Write TX FIFO 2byte data),
ISP_CONTROL_FUNTION = 0x80(Set Validate Endpoint).
What do I have to do ? What is my mistake? Please give me advice.............