STM32L4+ USB-CDC
Posted: Tue Dec 07, 2021 3:16 pm
Hi,
I am playing with STM32L4R5ZI nucleo 144 board. One thing that bug me out is that with ChibiOS 21.6.x USB is not working. I am using testhal/STM32/multi/USB_CDC example.
If I use 20.3.x stable - same example is working. I can not find any difference in the two projects. New features like dynamic clock are disabled, but boost is enabled ( which must not be a problem as CR5 register value for boost is same ), also clock configuration in two projects are same. What I can say is that with 21.6.x internal PULLUP is doing nothing (maybe hardware is not functioning correct). Any Ideas what to look at ?
edit: master is not working as well
I am playing with STM32L4R5ZI nucleo 144 board. One thing that bug me out is that with ChibiOS 21.6.x USB is not working. I am using testhal/STM32/multi/USB_CDC example.
If I use 20.3.x stable - same example is working. I can not find any difference in the two projects. New features like dynamic clock are disabled, but boost is enabled ( which must not be a problem as CR5 register value for boost is same ), also clock configuration in two projects are same. What I can say is that with 21.6.x internal PULLUP is doing nothing (maybe hardware is not functioning correct). Any Ideas what to look at ?
edit: master is not working as well