In the interest of a public discussion for those interested, we’ve been discussing STM32 hardware configurations in a PM. Early on in the thread Robert Wall posted [quote=“Robert.Wall, post:2, topic:6846, full:false”"] On the general subject, I’ve been having thoughts about implementation. I real…

My understanding is, if you are offering a unit for sale in the E.U., then if it falls within the scope of the regulations, it must be ‘CE’ marked. The nearer you can get to CE compliance before submitting it for test, the cheaper the testing process will be.

A short update for those interest first in DC monitoring. Glyn and I had a pre-testing meeting with CASS the company who we use for CE testing about emonDC development which was positive. @danbates is continuing to work on the next revision of emonDC although not STM based at this point. Back to t…

Easy I find, but a couple hours work perhaps making sure everything matches according to the datasheet.

Just to note, that for a new hardware project, it’ll be worth looking at KiCad, which I’ve heard has improved a lot recently, it’s open-source and doesn’t have board size restrictions.

I’ve finally had a little time to look at STM32 hardware again :slight_smile: First a good friend of ours and original NanodeRF designer who helped get OpenEnergyMonitor internet connected energy monitoring started: Ken Boak ( https://twitter.com/Monsonite ) has kindly shared a number of STM32 eagle …

ST-LINK JTAG/SWD Firmware Upload The nucleo development boards come with an integrated ST-Link-v2 programming board that you can snap off. The ST-LINK/V2 is an in-circuit debugger and programmer for the STM8 and STM32 microcontroller families. The single wire interface module (SWIM) and JTAG/seri…

Serial/UART Firmware Upload A second firmware upload method is to use serial (UART) upload, which works in much the same way as the standard way of uploading code to an Arduino. Like in the case of the Arduino serial upload this approach relies on a pre-uploaded bootloader. My understanding is that…

If you are using the emonTxShield you can easily forgo all the link wires and use the serialusb programmer directly on the 6way header (see STM32 Development - #207 by pb66 ) by not populating the 5v pin and linking the 5v and 3.3v tracks on the shield. You also need to change a couple of links on th…

Thanks Paul, does upload work on UART2? RX and TX for the emontx shield are connected to D0, D1 on the arduino headers or PA3,PA2 on CN10 which are UART2 or did you have to do something else to configure? My last challenge for the day was to test USB DFU upload, but I’ve been unable to get it to wo…

I’m sorry I’m a bit hazy on the detail, it was all new to me then and I’ve not looked at it since. From what I recall I did (eventually) get it to upload via usart2 (but could be mistaken), I do know that I went through a lot of different set ups to get there. I do not think DFU upload is possible…

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