MPC5748G USB Device endpoints

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MPC5748G USB Device endpoints

687件の閲覧回数
JirikP
Contributor II

We are trying to implement USB device on USB0 over ULPI USB3343. We already use this ULPI on other devices and we are sure that the HW level of design is fine.

Things that work:

 - communication with endpoint0 works without problems

 - pc recieves descriptor from endpoint0

 - speed setting to HighSpeed USB works fine

 

Things that dont work:

- we would like to use endpoint1 as bulk transfer

- we set everything according to datasheet but we get transfer timeout everytime we try to send anything

- we use this register to turn on the endpoint1 ENDPTC[0] (addr 0xffc901c4) to value (UOTG_ENDPTC_TXE_MASK | UOTG_ENDPTC_TXR_MASK | UOTG_ENDPTC_RXE_MASK | UOTG_ENDPTC_RXR_MASK) | UOTG_ENDPTC_TXT(USB_ENDPOINT_BULK) | UOTG_ENDPTC_RXT(USB_ENDPOINT_BULK)

What else should we set to make this work?

Please do help.

 

 

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3 返答(返信)

664件の閲覧回数
davidtosenovjan
NXP TechSupport
NXP TechSupport

Hi, I will try to find out whether there is someone who could help with this issue. I will return to you soon.

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657件の閲覧回数
JirikP
Contributor II

We used USB device class from another NXP MCU SDK and I missed some of the code where big and little endian is the problem, thats why endpoint1 didn't work. Now it works. Just please add some working USB example. This was way too much trouble for basic functionality like USB.

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645件の閲覧回数
davidtosenovjan
NXP TechSupport
NXP TechSupport

Thanks for the info.

Example codes you may find in S32DS. There are just two SDK examples for USB module called "usb_msd_fatfs_mpc5748g" and "usb_cdc_lwip_mpc5748g".

Unfortunately I am not aware of other ones. For this product line, it is a marginal feature, so we don't have many support queries either.

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