Search found 1794 matches

by victor_pv
Mon Jan 22, 2018 1:32 am
Forum: Libraries & Hardware
Topic: SdFat works with 256MB, but not with 4GB SDHC
Replies: 9
Views: 95

Re: SdFat works with 256MB, but not with 4GB SDHC

Note of caution, the SPI1 port is not supposed to run that fast. While testing something I had loads of errors with an SD card. I decided to test the SPI port alone, and connected TX to RX, then did DMA transfers. The result is that at max speed, with DMA for TX and RX, and someone else doing memory...
by victor_pv
Sat Jan 20, 2018 4:42 pm
Forum: STM32F103 Boards
Topic: What's the difference - stm32duino makes st-link inoperrable?
Replies: 13
Views: 148

Re: What's the difference - stm32duino makes st-link inoperrable?

May have something to do witht he debug pins. Not sure what's the default not, but look around the init() function, or wherever is called from, the find the one that sets the debug pins to alternate mode. A search in the forum will possibly give you some pointers. Search for debug pins, or jtag or s...
by victor_pv
Fri Jan 19, 2018 4:02 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 629
Views: 12172

Re: F405 & F411 versions of the BluePill

Squonk, then what do you think, keep original connector in the position it was originally, or are you going to try that smaller one you found? I don't think this is a deal breaker for anyone, at least not for first revision testing. On a different subject, I'm going to make a comment on how I have r...
by victor_pv
Fri Jan 19, 2018 3:45 am
Forum: Off topic
Topic: First experience review of allpcb, $15 for 5 100x100mm boards, $5 for 50x50mm boards, shipped DHL
Replies: 32
Views: 1013

Re: First experience review of allpcb, $15 for 5 100x100mm boards, $5 for 50x50mm boards, shipped DHL

Dev, are you embedded...@...? If so I see the credit in my page, so it's still giving me credit that we can use for community projects. Or so I hope, I have not tried yet to use any of the credit that shows up as "coupon" in my page since the F4 pill board is not final yet. I'll update the first pos...
by victor_pv
Thu Jan 18, 2018 4:34 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 629
Views: 12172

Re: F405 & F411 versions of the BluePill

Squonk, on sdcard connector, whichever works best for you in placing in the board. I think everyone agrees that the connector the other way around would be nice, but is not critical. Racemaniac, I think the shipping from China to multiple places would probably increase the cost. Where are you locate...
by victor_pv
Wed Jan 17, 2018 10:54 pm
Forum: Off topic
Topic: First experience review of allpcb, $15 for 5 100x100mm boards, $5 for 50x50mm boards, shipped DHL
Replies: 32
Views: 1013

Re: First experience review of allpcb, $15 for 5 100x100mm boards, $5 for 50x50mm boards, shipped DHL

Since the F4 bluepill is almost ready to start prototyping, if you registered with my link in the first page, please send me a private message and let me know, to track those credits to use for F4 bluepills. I am not aware of any other community project going on yet, but if there is another and get'...
by victor_pv
Wed Jan 17, 2018 10:51 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 629
Views: 12172

Re: F405 & F411 versions of the BluePill

Funny, if you enter Qty 60 from radio buttons, you get $19, but when you enter it in the text field and submit, you get $20 :shock: Where did you get the 64x16mm dimensions from? The actual PCB size is 53.34 mm x 22.86 mm. OK, here is the selection: allpcb_order_form.png I think it could be nice to...
by victor_pv
Wed Jan 17, 2018 7:51 pm
Forum: General discussion
Topic: [SOLVED] Need Help with EEPROM Emulation
Replies: 13
Views: 282

Re: Need Help with EEPROM Emulation

As pointed out before, the problem is most likely that you are wiping the whole flash when uploading with St-Link. You must use a method that doesn't wipe the whole flash (you can do so if using the ST_link GUI tool, has an option to select whether you want to completely erase the mcu or only the re...
by victor_pv
Wed Jan 17, 2018 7:00 pm
Forum: General discussion
Topic: [SOLVED] Enable interrupts from inside a timer interrupt
Replies: 29
Views: 466

Re: [SOLVED] Enable interrupts from inside a timer interrupt

There is also the option to feed a timer from another timer. I don't remember all the details, the datasheet shows what it can do, but perhaps that can remove the need to have 2 ISRs completely and leave only 1. I think that one of the modes is to enable the second timer to count once the first time...