Search found 1485 matches

by victor_pv
Thu Aug 24, 2017 1:45 am
Forum: General discussion
Topic: Rebooting to DFU bootloader in F4 and others.
Replies: 12
Views: 119

Re: Rebooting to DFU bootloader in F4 and others.

I believe STM may have a boot loader application note with a sample bootloader code for DFU. We could probably take that, and modify to our liking.
I had been thinking too in the problem of the sketch crashing or something and needing to reboot the board with the boot1 jumper set.
by victor_pv
Wed Aug 23, 2017 8:46 pm
Forum: STM32F103 Boards
Topic: AttachInterrupt for STM32F103
Replies: 12
Views: 5177

Re: AttachInterrupt for STM32F103

Is that the latency you measure between driving a pin to a certain level and your function being called? that seems like a lot. There is some overhead because the interrupt will not call your function right away, instead it calls a function in the core, that keeps a table of what functions to call f...
by victor_pv
Tue Aug 22, 2017 2:28 pm
Forum: STM32generic
Topic: [STM32GENERIC/HAL] SerialUSB TX/RX speed problem
Replies: 69
Views: 1248

Re: [STM32GENERIC/HAL] SerialUSB TX/RX speed problem

Why did you mark this as problem?
Problem: STM32Generic with CDC_BUF 128, and bufsize = 256 (speed ???)
3seconds between packets
by victor_pv
Tue Aug 22, 2017 2:16 pm
Forum: Projects
Topic: Anyone tried to make a 3D Printer controller?
Replies: 234
Views: 17679

Re: Anyone tried to make a 3D Printer controller?

ChrisMicro wrote:
Tue Aug 22, 2017 2:04 pm
This 3D-printer has a STM32F070.
There is a few boards now with STM32, but all closed source. I think monoprice has another one with an F103, and then there is the MKS ROBIN. But they won't even release the schematic :(
I'm starting to design my own with to plug to one of the mini F4 boards.
by victor_pv
Tue Aug 22, 2017 5:19 am
Forum: STM32generic
Topic: [STM32GENERIC/HAL] SerialUSB TX/RX speed problem
Replies: 69
Views: 1248

Re: [STM32GENERIC/HAL] SerialUSB TX/RX speed problem

Pito the Windows driver is definitely doing some buffering on it's end, since the bulk transfer is only for 64bytes, hard coded in the libmaple driver.
I wonder is the 4096 is some information the host sends to the board to indicate how much buffer space it currently has.
by victor_pv
Mon Aug 21, 2017 9:29 pm
Forum: Working / ported libraries
Topic: i2s library
Replies: 2
Views: 432

Re: i2s library

Hello! I'm have STM32F103RET6 board and can test as receive PT8211 DAC, but very interested test I2S record function. I have MP45DT02 MEMS microphone but can't test it. My knowledge for writing sketch for this purpose is not good, and i search who can make simple sketch for reading from I2S MEMS mi...
by victor_pv
Mon Aug 21, 2017 7:21 pm
Forum: General discussion
Topic: [POLL (Open)]- favorite STM32F1 board for stm32duino 08/2107
Replies: 22
Views: 470

Re: [POLL (Open)]- favorite STM32F1 board for stm32duino 08/2107

Rick I think the blue pills are so cheap and widely available, nothing will come close, and I agree with you people looking for more resources will probably jump to an F4. It's easier to find an F407 that an F103RET, and about the same cost. Keep the poll open for longer, perhaps make it a sticky an...
by victor_pv
Mon Aug 21, 2017 5:18 pm
Forum: General discussion
Topic: Rebooting to DFU bootloader in F4 and others.
Replies: 12
Views: 119

Rebooting to DFU bootloader in F4 and others.

Since the STM32F4xx MCUs have a DFU bootloader included in ROM, I'm thinking on adding code so when the board is rebooted to upload a sketch it goes to system rom, to show as DFU device, rather than just doing a hard reset. The idea is to be able to reboot to DFU without using boot1 pin (as long as ...
by victor_pv
Mon Aug 21, 2017 5:03 pm
Forum: Cores
Topic: [Libmaple] pinMode() disables timer even if no PWM mode involved
Replies: 35
Views: 1134

Re: pinMode() disables timer even if no PWM mode involved

This thread seems to be focused on the libmaple based core, so I am moving it to that forums.
by victor_pv
Mon Aug 21, 2017 12:57 pm
Forum: General discussion
Topic: [POLL (Open)] Blocking behaviour of Serial.USB during TX
Replies: 9
Views: 133

Re: [POLL (Open)] Blocking behaviour of Serial.USB during TX

Updated the previous post to add RX behavior in the DUE.