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by Rick Kimball
Sun Apr 23, 2017 8:36 pm
Forum: STLink
Topic: Help with st-link v2
Replies: 22
Views: 145

Re: Help with st-link v2

You should focus on getting blink to work. If blink isn't working then you are doing something wrong. Trying to make the usb stuff work before getting blink is a waste of time.
by Rick Kimball
Sun Apr 23, 2017 8:34 pm
Forum: STLink
Topic: Help with st-link v2
Replies: 22
Views: 145

Re: Help with st-link v2

It is normal that you dont have any COM port, Serial usb must be enabled with the extra flag -DSERIAL_USB in boards.txt, if you use other upload method then USB DFU. Is BOOT0 jumper on "0"? So that means I should just copy and paste the -DSERIAL_USB in boards.txt? I've tried the BOOT0 jum...
by Rick Kimball
Sun Apr 23, 2017 8:28 pm
Forum: STLink
Topic: Help with st-link v2
Replies: 22
Views: 145

Re: Help with st-link v2

Ok, I'm now powering it off of the usb port...and have only the 3 pins connected to the st-link. Still...no port Also I've tried a blink sketch. I set PC13 as output and then do a digitalWrite, but the LED does nothing :S Are you talking about the bluepill serial port, or a serial port on the stlin...
by Rick Kimball
Sun Apr 23, 2017 7:38 pm
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 660
Views: 38901

Re: $10 O-Scope revisited

Why do people here constantly pollute the threads with non related questions? It is getting ridiculous now.

... Looks around for a moderator control panel and the delete post button ...
by Rick Kimball
Sun Apr 23, 2017 6:58 pm
Forum: Projects
Topic: WANTED - blue pill schematics and board files
Replies: 7
Views: 152

Re: WANTED - blue pill schematics and board files

Even though my bluepill silkscreen mentions the vcc-gnd web site, the schematics there certainly don't match my board.
by Rick Kimball
Fri Apr 21, 2017 6:09 pm
Forum: STM32F4 Boards
Topic: FPU on F407 - how to
Replies: 99
Views: 1152

Re: FPU on F407 - how to

Q: hopefully the "float" in MapleMini profile does not mean the "double". That would be a disaster.. Why would that be a bad thing? If you think about the cortex-m4, using float would facilitate the use of the hardware FPU. I honestly don't see what Arduino user would even notic...
by Rick Kimball
Fri Apr 21, 2017 12:53 pm
Forum: STM32F4 Boards
Topic: FPU on F407 - how to
Replies: 99
Views: 1152

Re: FPU on F407 - how to

It can be fine as well but why in variants?! I didn't put the reset function in the variant. That is just where it seems to be. Myself, I'd move the start up code to the core directory. I'd put it here: https://github.com/stevstrong/Arduino_STM32/blob/Black_F4_variant/STM32F4/cores/maple/boards.cpp...
by Rick Kimball
Fri Apr 21, 2017 12:18 pm
Forum: STM32F4 Boards
Topic: FPU on F407 - how to
Replies: 99
Views: 1152

Re: FPU on F407 - how to

I'd also suggest to put this in function "init()" of "boards.c". I'd put it in the reset interrupt hander code, before any constructors are ever called. To be safe you want to make sure it is called before any of the __preinit_array functions are called. Right after the BSS sect...
by Rick Kimball
Fri Apr 21, 2017 2:03 am
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 660
Views: 38901

Re: $10 O-Scope revisited

I guess you weren't named Leonardo in a past life : )
by Rick Kimball
Thu Apr 20, 2017 7:14 pm
Forum: STM32F4 Boards
Topic: FPU on F407 - how to
Replies: 99
Views: 1152

Re: FPU on F407 - how to


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