Search found 716 matches

by ag123
Mon Apr 19, 2021 12:55 pm
Forum: General discussion
Topic: USB Host, what solution?
Replies: 9
Views: 104

Re: USB Host, what solution?

think cube ide has option to select the host otg driver. possibly 'more complicated' since it needs to poll and enumerate the devices. i think there could be additional circuit requirements, e.g. that for usb host maybe the resistors should be pull down rather than pull up. think the mass storage pr...
by ag123
Sun Apr 18, 2021 7:17 pm
Forum: STM boards (Discovery, Eval, Nucleo, ...)
Topic: Weird hangs RFM69 + WeAct Blackpill V2
Replies: 10
Views: 194

Re: Weird hangs RFM69 + WeAct Blackpill V2

this is going to be a weird suggestion you may like to try the libmaple core as the SPI implementation is different (pretty much written from scratch) https://github.com/rogerclarkmelbourne/Arduino_STM32 note that the libmaple api isn't really compliant with every aspects of the arduino api. Hence, ...
by ag123
Sun Apr 18, 2021 2:59 pm
Forum: STM boards (Discovery, Eval, Nucleo, ...)
Topic: Weird hangs RFM69 + WeAct Blackpill V2
Replies: 10
Views: 194

Re: Weird hangs RFM69 + WeAct Blackpill V2

this would seem a little out of the norm, but a few things could help: - e.g. for spi (just SPI itself not the cpu core) try to run it at a lower speed, this may help that is normally done with the SPISettings() structure or class https://www.arduino.cc/en/Reference/SPI https://github.com/stm32duino...
by ag123
Sat Apr 17, 2021 1:43 pm
Forum: General discussion
Topic: postbag topics
Replies: 20
Views: 986

Re: postbag topics

that soldering is 'quite ok' never mind all that blobs, mine is quite as bad :lol: oh and for maple mini (clones) my common hack is to buy those cheap 32768 crystals and just solder them at the rtc osc pins https://www.aliexpress.com/af/32768.html?d=y&origin=n&SearchText=32768&catId=0 bu...
by ag123
Sat Apr 17, 2021 4:50 am
Forum: STM boards (Discovery, Eval, Nucleo, ...)
Topic: Weird hangs RFM69 + WeAct Blackpill V2
Replies: 10
Views: 194

Re: Weird hangs RFM69 + WeAct Blackpill V2

it could be related to spi, try to reduce the spi speeds to see if it helps.
by ag123
Fri Apr 16, 2021 3:32 pm
Forum: General discussion
Topic: constant ADC Average via DMA
Replies: 2
Views: 71

Re: constant ADC Average via DMA

average needs to be done on the cpu, the analog alternatives are to low pass filter it (e.g. rc filter) before reading it with an adc
by ag123
Thu Apr 15, 2021 5:16 pm
Forum: IDE's
Topic: [SOLVED] Maple_Upload.bat : EXCEPTION_ACCESS_VIOLATION
Replies: 18
Views: 3732

Re: [SOLVED] Maple_Upload.bat : EXCEPTION_ACCESS_VIOLATION

I think the main issue is to find a universal tool which instantiate the USB DFU interface on all OS which allows the upload. And Java is the one which can be used independent on the platform. Unless one develop different tools for each platform in part. i think that java-loader.jar app's key use i...
by ag123
Thu Apr 15, 2021 1:03 pm
Forum: IDE's
Topic: [SOLVED] Maple_Upload.bat : EXCEPTION_ACCESS_VIOLATION
Replies: 18
Views: 3732

Re: [SOLVED] Maple_Upload.bat : EXCEPTION_ACCESS_VIOLATION

i think these problems may have something to do with the dicey windows dll environment. if i'm not wrong jssc is actually a serial driver / connector library https://github.com/java-native/jssc this is apparently used by processing and that java-loader is apparently written in processing. if you are...
by ag123
Wed Apr 14, 2021 5:52 pm
Forum: General discussion
Topic: attachinterrupt issue on STM32F412VG
Replies: 2
Views: 121

Re: attachinterrupt issue on STM32F412VG

among the things to check, is if the cpu and buses are running at the intended speeds as given on the specs sheets? and if they are the other thing would be the prescaler settings say on timers etc. the crystal frequency, and pll multipliers/dividers are often a spot to check if after all the cpu an...

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