Search found 1676 matches
- Mon Apr 29, 2024 7:31 am
- Forum: General discussion
- Topic: Stumbling at the first connection...
- Replies: 7
- Views: 1498
Re: Stumbling at the first connection...
for this maple DFU boot loader, after you press reset, it should blink fast for like 6 times, you need to click upload or run dfu-util within about 4-5 seconds when it blinks there is a 'perpetual' mode, and I think the setting is 'boot1' jumper this is from the good old days http://static.leaflabs....
- Mon Apr 29, 2024 5:21 am
- Forum: Libraries & Hardware
- Topic: Adafruit Nexopixel Library not working...
- Replies: 8
- Views: 1758
Re: Adafruit Nexopixel Library not working...
I think there is one more trouble, I think neopixels are driven at 5 V https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf it may take a 74LVC1G17 to interface it https://www.nexperia.com/products/analog-logic-ics/logic/buffers-inverters-transceivers/schmitt-trigger-ics/series/74LVC1G17.html https:...
- Mon Apr 29, 2024 4:42 am
- Forum: General discussion
- Topic: STM32 Pinout Polarity
- Replies: 5
- Views: 930
Re: STM32 Pinout Polarity
one should read datasheets e.g. https://www.st.com/resource/en/datasheet/stm32f103c8.pdf 5.2 Absolute maximum ratings Output current sunk by any I/O and control pin 25 mA Output current source by any I/Os and control pin − 25 mA in fact it should be much less than this like 5 mA max, at 20 mA you ri...
- Sun Apr 28, 2024 2:20 pm
- Forum: General discussion
- Topic: Stumbling at the first connection...
- Replies: 7
- Views: 1498
Re: Stumbling at the first connection...
custom bootloaders are 3rd party developed back in the 'old days' there is leaflabs maple, that is the first popular *duino running on stm32f103, the old forum which hosted this made improvements originally hosted by 'roger' https://github.com/rogerclarkmelbourne/Arduino_STM32 https://github.com/rog...
- Sat Apr 27, 2024 6:11 pm
- Forum: General discussion
- Topic: Stumbling at the first connection...
- Replies: 7
- Views: 1498
Re: Stumbling at the first connection...
if you want to program a stm32f103 e.g. those 'blue pill' style boards. get a st-link v2 https://www.adafruit.com/product/2548 https://www.st.com/en/development-tools/st-link-v2.html https://octopart.com/search?q=st-link+v2 for 'blue pill' style boards, i think they put the headers for that at the '...
- Sat Apr 27, 2024 1:02 pm
- Forum: Libraries & Hardware
- Topic: Adafruit Nexopixel Library not working...
- Replies: 8
- Views: 1758
Re: Adafruit Nexopixel Library not working...
for neopixels I've been thinking about using Timers and DMA https://www.thevfdcollective.com/blog/stm32-and-sk6812-rgbw-led https://ralimtek.com/posts/2021/ws2812/ think Adafruit's Neopixel lib uses SPI? well nothing 'wrong about it' but that using Timers possibly 'saves' an SPI port and is possibly...
- Sat Apr 27, 2024 7:43 am
- Forum: General discussion
- Topic: Stumbling at the first connection...
- Replies: 7
- Views: 1498
Re: Stumbling at the first connection...
usually this indicates a bad usb cable
- Mon Apr 22, 2024 11:24 am
- Forum: General discussion
- Topic: WeAct Studio STM32F411CEU6 BlackPill v3.1 crystal is 8 MHz
- Replies: 40
- Views: 6783
Re: WeAct Studio STM32F411CEU6 BlackPill v3.1 crystal is 8 MHz
among the things to try, after successfully flashing through st-link, try with DFU again, maybe make some changes so as to tell that that is installed from DFU. it is quite possible the flash could be write protected. But that with st-link, there is a special means connect under reset which can ove...
- Mon Apr 22, 2024 6:33 am
- Forum: General discussion
- Topic: WeAct Studio STM32F411CEU6 BlackPill v3.1 crystal is 8 MHz
- Replies: 40
- Views: 6783
Re: WeAct Studio STM32F411CEU6 BlackPill v3.1 crystal is 8 MHz
if you can work with fpiSTM to do a commit for a new variant for 8 Mhz (by means of a PR pull request) do help to test that. the files that are needed to be updated are a copy of that variant file with a new name, and maybe some other source files (i'm not sure but you'd need to check), e.g. the inc...