I suspect it could be possible to burn the maple bootloader onto this board, but as it only has 2 buttons, But perhaps it could be changed to use the jump links (assuming the source is available) I'm going to order a couple of leaf mini clones as well as waiting for my jtag programmer to turn up. I suspect they are just put there for developers to use to allow configuration to be read, i.e if the board had a boot loader I tried all permutations of the jump links but it doesn't seem to make any difference - the USB just comes up as unrecognised device and no hardware ID's are shown, I guess I should have also ordered one of the maple mini clones, but just this unknown board.ĭid anyone else buy one of these or is it just meĭon't appear to be immediately programmable via USB. Unfortunately the pictures seem t suggest its only programable via slink, and my programmer hasn't arrived yet, unless it does something different when I change the jump links, it looks like I will have to wait for my programmer I will need to run it through Google translate I will contact my ebay supplier to see if they have any information.įound this which appears to be the original manufacturer or designer but its in Chinese Has anyone found anything else out about these boards. I notice there are 2 jumper links on the top of the board, both of which are open, but as I don't have any docs on the board yet, I don't know what they do. shipments (free):īut I've not had time to do anything except to plug in via USBīut I got a message on windows 7 saying the USB device had malfunctioned. I found an alternate source for $24 for Qty. Went back to eBay to see if I could reorder - the listing has changed to exclude U.S.A. My tech is a master rated extrainer for the manufactor and he has tweeked the unit, but there are lots of annoyances. Overall, I am satisfied the system saves money in dual mode, but below 45 things get pretty iffy, IMO. EHeat even kicks in when the temperature drops quickly, as with a quick moving front. So, the eHeat system kicks in a lots when cold outside. But in Atlanta, it is not unusual to have low temperatures in December, January, and February dropping below the efficient transfer temp of the thermal fluid. Well, I installed an R410A system because at the time its performance (on charts) was superior to other formulations. What? I'm getting hvac and heat pump installed over next few months!īut if all goes to plan my heat pump will use less than 6KW max. Also, some simple Mini Maple projects with source may be found onĪfter HVAC dude vacates my basement lab. I also confirmed that changing the CPU for an STM32 obtained from Farnell on one of these boards fixed the USB issue.For a summarized version of pertinent information contained in this lengthly It also rather looks to me like a large batch of these particular boards with suspect chips is now in circulation, as I have 6 boards obtained in 3 different orders, 2 from UK stock and 4 in 2 lots from China direct (all last couple of months though). I did successfully get the openCM3 CDC example project to work in VSC/Platformio (after sorting out the STlink programming issue discussed in the link) and Macbeth got the USB to work another way, but as it stands the, it looks as though the current STM32duino code and these chips are incompatible. I have not found any of the STM32duino code (including bootloaders) to work with these chips, whatever they are. I have tested my boards and the configuration bits at 0圎00FFFC0 are a match for Macbeth's when read using using ST-Link Utility, so the manufacturer as read from the chip is not ST if I understand correctly. While the discussion is about not being able to program STM32's with STlink, it turns out that the reason it doesn't work is because the CPUID was different than that which would be read from a genuine STM32 part. The link below, second page, has more on these boards. there may of course be versions of the chip with correct markings, not STM32) that that also don't work. I have concluded that while the boards were sold as STM32F103C8T6 system minimum boards and the chips are labelled as STM32F103C8T6, they are in fact something else with STM32 markings. I was have been having problems getting USB to work with recent STM32F103C8T6 system minimum boards, getting 'device not recognised' messages and 'device descriptor request failed' message in device manager (Win 10).
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