Search found 1739 matches

by Pito
Wed Feb 21, 2018 10:23 pm
Forum: Builds and Announcements
Topic: Optimisation and clock speed menu - enhancements
Replies: 21
Views: 1258

Re: Optimisation and clock speed menu - enhancements

@alexandros: Changing the clock on-the-fly: I think we discussed that in past - I wrote you have to take the specific routines from the core which 1. set the cpu clock (incl. flash wait states), 2. set millis/micros, 3. set serial baudrate, and create calls for example cpu72(), cpu128(), cpu8(), cpu...
by Pito
Tue Feb 20, 2018 5:49 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 769
Views: 15413

Re: F405 & F411 versions of the BluePill

Which means that the ferrite bead between GND and AGND is useless IMHO. I would suggest to make some practical measurements - with 0ohm and with FB. The topic is pretty tricky, so better do make measurements (various FB values) and compare on your first release pcb, rather than throwing FBs out in ...
by Pito
Tue Feb 20, 2018 3:40 pm
Forum: Projects
Topic: LSE RTC calibration
Replies: 9
Views: 155

Re: LSE RTC calibration

You cannot beat the DS3231, no chance. No crystal heater needed, no calibration, around one uA current in average, few secs/y off, not loosing time when BPill is flashed..
by Pito
Tue Feb 20, 2018 3:26 pm
Forum: General discussion
Topic: [all cores] F4+F1: ABP1 timer clock frequency
Replies: 3
Views: 87

Re: [all cores] F4+F1: ABP1 timer clock frequency

F4 - yes, there is a freq doubler when APB1,2 prescaler is not ==1 (see the CubeMX'es clock generator configuration tool).
I indicated 2y back the setPeriod() in F4 gives a wrong pwm period, it could be related to the setting as well..
F4 doubler.JPG
F4 doubler.JPG (23.4 KiB) Viewed 59 times
by Pito
Tue Feb 20, 2018 2:26 pm
Forum: Off topic
Topic: Any idea what this protocol is ????
Replies: 3
Views: 86

Re: Any idea what this protocol is ????

Which digital radio?
by Pito
Mon Feb 19, 2018 11:13 am
Forum: Off topic
Topic: Amiga on Out FPGA board
Replies: 3
Views: 94

Re: Amiga on Out FPGA board

Congratulation! Soldering such an FPGA requires a lot of courage! :)
by Pito
Mon Feb 19, 2018 11:12 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 769
Views: 15413

Re: F405 & F411 versions of the BluePill

Is there any list of mcus which fit onto the board (without any mods)?
by Pito
Mon Feb 19, 2018 12:28 am
Forum: STM32F4 Boards
Topic: [libmaple] Black F407VET6
Replies: 148
Views: 7168

Re: [libmaple] Black F407VET6

Any example for a simultaneous regular ADC sampling (2 ADCs sample a channel at the same exact time, no channel's scan - scan disabled)?
by Pito
Sun Feb 18, 2018 2:30 pm
Forum: Code snipplets
Topic: Reading Battery Voltage
Replies: 4
Views: 138

Re: Reading Battery Voltage

Do you switch off/on the bottom R2 divider resistor?