Search found 2061 matches

by stevestrong
Wed Feb 21, 2018 5:14 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from Japan - Blue pill SD Card
Replies: 13
Views: 173

Re: Hello from Japan - Blue pill SD Card

We had this issue several times.
The only way to make it work is to remove any resistor or level shifter between the SD card slot and module pins.

Those resistor you see on the alix picture are pull-up resistor to 3.3V, they are needed.
by stevestrong
Wed Feb 21, 2018 1:46 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from Japan - Blue pill SD Card
Replies: 13
Views: 173

Re: Hello from Japan - Blue pill SD Card

Be aware that the SD card module should not have a 5v 3.3v converter. It seems that your SD card module is not appropriate to work with blue pill, because it has the 5V->3.3V converter. You should get an SD card module without that power converter. Suggested is like this one: https://www.aliexpress...
by stevestrong
Wed Feb 21, 2018 8:27 am
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

Thanks for all the information.
My experience supports these.

I will analyze the setPeriod() function for 4, as Pito indicated, and change it if needed.
by stevestrong
Wed Feb 21, 2018 7:05 am
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from Japan - Blue pill SD Card
Replies: 13
Views: 173

Re: Hello from Japan - Blue pill SD Card

I cannot see any image.
Be aware that the SD card module should not have a 5v 3.3v converter.
by stevestrong
Tue Feb 20, 2018 7:54 pm
Forum: STM32F4 Boards
Topic: [libmaple] Black F407VET6
Replies: 148
Views: 7169

Re: [libmaple] Black F407VET6

This is another wave form generation example using DMA now. This example allows to configure the output frequency (and amplitude in case internal triangle wave generator). The example sine wave has 210 samples and 8 bit resolution, with 3.3Vpp. The generated 20 kHz frequency is quite precise and the...
by stevestrong
Tue Feb 20, 2018 5:09 pm
Forum: STM32F103 Boards
Topic: [SOLVED] Adafruit BME280 + MapleMini. Multiple <Wire.h>
Replies: 8
Views: 92

Re: Adafruit BME280 + MapleMini. Multiple <Wire.h>

myWire is the I2C instance (a variable).
&myWire is the address in RAM of the instance, a pointer to the variable.

I mark it as solved for you.
by stevestrong
Tue Feb 20, 2018 2:32 pm
Forum: General discussion
Topic: [all cores] F4+F1: ABP1 timer clock frequency
Replies: 3
Views: 87

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

I just implemented some wave generation with F4 DAC using Timer 6 TRGO as sampling event. With this occasion I observed that the generated waveform shape is fine, but the timing (generated period width) is somehow wrong, yielding always the half of the expected period. This would mean that timer 6 h...
by stevestrong
Tue Feb 20, 2018 2:16 pm
Forum: Builds and Announcements
Topic: Optimisation and clock speed menu - enhancements
Replies: 21
Views: 1260

Re: Optimisation and clock speed menu - enhancements

Insert to https://github.com/rogerclarkmelbourne/ ... up.cpp#L53 following piece of code:

Code: Select all

#elif F_CPU==96000000
		#define BOARD_RCC_PLLMUL RCC_PLLMUL_12