Search found 1737 matches

by Pito
Tue Feb 20, 2018 3:40 pm
Forum: Projects
Topic: LSE RTC calibration
Replies: 6
Views: 76

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: 1
Views: 35

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 7 times
by Pito
Tue Feb 20, 2018 2:26 pm
Forum: Off topic
Topic: Any idea what this protocol is ????
Replies: 2
Views: 19

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: 67

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: 764
Views: 15184

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: 147
Views: 7040

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: 113

Re: Reading Battery Voltage

Do you switch off/on the bottom R2 divider resistor?
by Pito
Sat Feb 17, 2018 5:29 pm
Forum: Projects
Topic: Lightpen
Replies: 5
Views: 149

Re: Lightpen

Which electron beam you want to detect? There are 3 (when talking a color TV) :) Also mind in the areas where you see "black" no electron beam is present. Such lightpens worked: 1. you scanned with the ebeam "on" the entire screen (the scanning driven by some "electronics"), and when detected the li...
by Pito
Sat Feb 17, 2018 5:04 pm
Forum: STM32F103 Boards
Topic: STM32F103C8T6 (blue pill) audio feed through with PWM and timers
Replies: 7
Views: 213

Re: STM32F103C8T6 (blue pill) audio feed through with PWM and timers

To your first source: 1. I would set sampling rate equal to the pwm freq (10kHz) 2. you still use "65535" in your map(), that is wrong, you have to use "maxduty" instead - this your line is wrong outputValue = map(inputValue, 0, 4095, 0, 65535); //ADC uses 12 bit (4096 values), map to output of 16 b...