Benchtop Measurement and Test
Distributed Measurement and Control
High-Performance Test
Systems Engineering Software
Perspectives showcases how NI sees what’s next in the world of test and technology.
You can request repair, RMA, schedule calibration, or get technical support. A valid service agreement may be required.
Provides support for NI data acquisition and signal conditioning devices.
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments.
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
修改时间 10-22-2014 04:09 AM
usb芯片用的cy7c68013。固件程序:2端口OUT,6端口IN,四缓冲,slavefifo模式,批量传输(BULK)。下位机程序:接到上位机发送的任意数据后,就从0-255循环发送数据。 !!!上位机情况:最常见读写超时,有的时候还io错误,偶尔接到一次数据就再也收不到了(接受数据正确)。官方上位机:正常显示。
ps:下位机fpga驱动,每回重启fpga,cypress固件重下会收上来一次数,最后io错误结尾。
修改时间 07-29-2015 08:47 PM
这个问题似乎出在USB通信上,可以按照以下步骤确认问题所在:
1.上下位机通信协议是否正确?如果不正确自然会报超时错误;
2.建议把上位机读取或者写入超时时间设置长一些,防止短时没有有效数据报错。
3.您的固件用其他程序能正常使用吗?
What do you need our team of experts to assist you with?
Thanks!
We'll be in touch soon!