MQX Software SolutionsのトピックRe: TWR_K20D72M MQX Lite PE USB stack problem

TWR_K20D72M MQX Lite PE USB stack problem

marcbunyard — Wed, 19 Jun 2013 15:11:45 GMT

I am working on the TWR_K20D72M using PE with MQX Lite and the USB_LDD, and it won't enumerate. I have used the example in C:\Freescale\CW MCU v10.4\MCU\CodeWarrior_Examples\Processor_Expert\Kinetis\TWR-K20D72M\USB_MS_Device, and seems to set everything up correctly, but when the Host performs GetDeviceDescriptor, erroneous data in sent in response to the IN packet. The example does not use MQX Lite, and when I run it as is, it works.

I can't find an example of MQX Lite with PE and USB for the K20. Is there one?

Re: TWR_K20D72M MQX Lite PE USB stack problem

marcbunyard — Wed, 19 Jun 2013 21:46:25 GMT

I moved the DeviceDescriptor data from ROM to RAM, and the data problem has cleaned up.

Re: TWR_K20D72M MQX Lite PE USB stack problem

Monica — Fri, 21 Jun 2013 00:11:09 GMT

Marc,

that is great, thank you very much for sharing your resolution! :smileygrin:

Best regards,

Monica