About David Ledger

David Ledger · 2021-01-21

I've setup USART to interrupt on a timeout using:CR2.RTOENCR1.RTOIEAnd configured the timeout using:RTOR.RTOIt works great, really nice feature. The RTO timeouts are always measured from the last stopbit/character received. However, I need to support...

David Ledger · 2019-07-23

Hello,I have coded some usb code which is correctly sending and recieving data. The problem is that at the end of sending the device descriptor no STATUS_OUT packet is sent.I've done the following to get the above sending:Copy the rx data from usb bu...

David Ledger · 2019-07-04

The below paragraph to me is almost incoherient. I don't have a usb protocol analyser so its important I get this right (From page 684 of the RM0350 user guide):OUT and SETUP packets (data reception)"These two tokens are handled by the USB peripheral...

USB_ISTR Register User Manual Ambiguity · 2019-07-01

I have a USB development project that entails the creation of a composite USB device. To integrate it with third party USB stacks I'm developing an interface for the low level USB functionality. In the RM0360 user manual, Page 697 the DIR bit is desc...

David Ledger · 2018-10-14

Hello,I couldn't find a better category for this.I'm using the USBLC6-2 for USB protection in a product that could potentially have a 20 V USB line (USB-PD). Like this:However, the VDD line would be clamped by this IC, is it acceptable to drop the VD...

David Ledger · 2021-02-15

thanks!

David Ledger · 2021-01-23

I thought that might be the case. Was looking for a dependable workaround to keep timeout functionality to the peripheral itself (just seemed like more modular design).Appreciate the responses. Shame its not possible, honestly it seems like a trivial...

David Ledger · 2019-07-24

If possible you can try armclang, it usually provides more detailed error messaging.Otherwise, add the verbose output flag to the compile command.

David Ledger · 2019-07-05

I'm still confused as to why they mentioned the packing if half words with byte order. The least significant byte of a uint16 is (v & 0xff), so it implies its written first, then (v & 0xff00) is written. I have little endian machine, I believe M0 is ...

David Ledger · 2019-07-02

Thankyou!Why didn't they write that lol.In that case it should say:DIR is set to 0 when CTR_TX bit is set in the USB_EPnR register related to the interrupting endpoint.andDIR is set to 1 when, CTR_RX bit or both CTR_TX/CTR_RX are set in the USB_EPnR ...

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I have a STM32L4xx series microcontroller. My goal is to use RTO in USART to issue a timeout, from the time a read was attempted (not only from the last stop bit). This is needed as its possible for nothing to be received. How do I acheive this using RTO?

No Status Out transaction for USB on STM32F070F6

Need help Interpretting STM32F070 USB User Guide

USB_ISTR Register User Manual Ambiguity

USB ESD Protection -> USBLC6-2

Re: I have a STM32L4xx series microcontroller. My goal is to use RTO in USART to issue a timeout, from the time a read was attempted (not only from the last stop bit). This is needed as its possible for nothing to be received. How do I acheive this using RTO?

Re: I have a STM32L4xx series microcontroller. My goal is to use RTO in USART to issue a timeout, from the time a read was attempted (not only from the last stop bit). This is needed as its possible for nothing to be received. How do I acheive this using RTO?

Re: Why does the compiler get stuck building main.cpp?

Re: Need help Interpretting STM32F070 USB User Guide

Re: USB_ISTR Register User Manual Ambiguity