Electronics > Projects, Designs, and Technical Stuff
STM32F103 min system with USB-TTL converter?
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thm_w:
Can you post their schematic? Or compare yours and theirs and see what the difference is in terms of USB/CH340.
bjdhjy888:
OMG!!!!!!!!!!!!
my project is working!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ;D ;D ;D ;D ;D ;D ;D
2 issues degbugged!
1. CH340C's pin 4 and pin 16 are now powered at 3.3V, instead of 5V, thanks to another schematic found on the internet.
2. Reset button must be pressed before flashing, while boot 0 is on

man, i'm thrilled!
thanks for you guys' help!
debegging is painful, but it's worth it!

thanks again, bros!!! ;D ;D ;D ;D
bjdhjy888:
My next step is to connect an external MPU-6050 module with my board.
In order for the module to communicate with my board, I need to use two wires for an I2C connection between MPU-6050 and my STM32.
The thing is, there is no room around PB6 and PB7 of my STM32.
I will need to put two vias inside my STM32. Is this unprofessional? I tried to avoid putting vias inside any IC's.
Please let me know. Thanks!
mariush:
Well, i wrote two long posts with suggestions and you seem to have ignored everything i said, or even acknowledge what I wrote.... so why would i bother giving you more advice or tips?

just the first thing that comes to mind is.... for example at least two people told you that those oscillators/crystals/whatever should be close to the chip and those small ceramic capacitors should also be close, yet your parts are still centimeters away from your chip.
bjdhjy888:

--- Quote from: mariush on August 31, 2019, 12:01:46 pm ---Well, i wrote two long posts with suggestions and you seem to have ignored everything i said, or even acknowledge what I wrote.... so why would i bother giving you more advice or tips?

just the first thing that comes to mind is.... for example at least two people told you that those oscillators/crystals/whatever should be close to the chip and those small ceramic capacitors should also be close, yet your parts are still centimeters away from your chip.

--- End quote ---
Though I did appreciate your reply, I had the right to not follow yours.
I followed most people's replies.
If you feel uncomfortable, please do reply my posts again.
I don't like being overwhelmed or reading huge paragraphs with no capitalizations or logic.
I had trouble reading your English as well.
Sorry.
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