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makerbase-mks / MKS-Robin-E3-E3D

MKS Robin E3 E3D 32Bit Control Board 3D Printer parts with tmc2209 Uart mode driver For Creality Ender 3 CR-10
https://www.aliexpress.com/item/4000781744682.html
GNU General Public License v3.0
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STM32F103 / STM32F407 boards BOOT0 pin should have *jumper* (or button) to VDD 3v3 #140

Closed ag88 closed 2 years ago

ag88 commented 2 years ago

STM32F103 / STM32F407 boards BOOT0 pin should have jumper (or button) to VDD 3v3, and the pin should be resistor to GND. 1k, 4.7k etc. or can jumper both sides 3V3, BOOT0, GND, so normal use jumper BOOT0, GND, program jumper 3V3, BOOT0

Your boards are quite good, but for many of your boards e.g. Robin Nano V3 https://github.com/makerbase-mks/MKS-Robin-Nano-V3.X/blob/main/hardware/MKS%20Robin%20Nano%20V3.0_004/MKS%20Robin%20Nano%20V3.0_004%20SCH.pdf Robin Nano V1.x https://github.com/makerbase-mks/MKS-Robin-Nano-V1.X Robin E3D https://github.com/makerbase-mks/MKS-Robin-E3-E3D/blob/master/hardware/MKS%20Robin%20E3%20V1.1_004/MKS%20Robin%20E3%20V1.1_004%20SCH.pdf https://github.com/makerbase-mks/MKS-Robin-Nano-V1.X/blob/master/hardware/MKS%20Robin%20Nano%20V1.3_002/MKS%20Robin%20Nano%20V1.3_002%20SCH.pdf

BOOT0 is tie to GND, this is not good. BOOT0 allows the use of UART to upload firmware on PA9 TX, PA10 RX for STM32F103. And for STM32F407 BOOT0 allows direct USB DFU firmware upload (no need extra boot loader or st-link). The procedure is set BOOT0, press reset, upload firmware.

So for STM32F103 (for STM32F407 as well) uart1 pins PA9, PA10 should be made available on headers. I think this is already ok.

mks-viva commented 2 years ago

MKS Robin Nano V3.X has same the issues, so, i will close this issues. https://github.com/makerbase-mks/MKS-Robin-Nano-V3.X/issues/63