MKS-TFT28 v4.0
Inspired by https://github.com/robotsrulz/MKS-TFT, MKS TFT32/28 Opensource Firmware.
WHY and Warning
The MKS board has a propriety bootloader and firmware. I've been unable to find the source and, in my attempts to probe the board, I disabled the code protection and accidently erased the STM32F107 bootloader :). The board was dead.
I've ordered a replacement and have decided to use the corpse of the old board for development.
What This Is
Scratch pad where I plan to develop a base firmware for the Makersbase TFT28 v4.0 Board. This module has been closed source and a major pain point for many enthusiasts. Feel free to borrow or learn form any of the work here. Hopefully it takes shape into something amazing.
Disclaimer !!
As of 9 October, I'm still in the process of reverse engineering the board and getting all drivers into the operational state.
Connecting ST-LINK v2 to the MKS TFT:
ST-LINK MKS-TFT32:
5v AUX-1 5v
GND AUX-1 GND
SWDIO JTAG pin 4
SWCLK JTAG pin 5
Board JTAG connector (left-to-right):
3.3v GND GND
SWDIO SWCLK RESET
Disconnect MKS TFT from printer before connecting ST-LINK. Do not connect ST-LINK 3.3v pin.
Board Configuration
BOOT Mode: Boot0 = 0, Boot 1 = 0
SPI1 (default): SPIFlash: Winbond 8MB (64Mb) Serial Flash Memory W25Q CS: PB9,MOSI=PA7,PIN_SPI_MISO=PA6,PIN_SPI_SCK=PA5
SPI1 (default): SDCard CS: PD11, MOSI=PA7,PIN_SPI_MISO=PA6,PIN_SPI_SCK=PA5
SPI3 (remapped): URTouch CS: PC5
I2C: Two-wire Serial EEPROM AT24C16B
UART1: Wifi connector
UART2: Octopi
UART4: Touch controller
PX11/12, UART1_CTS/RTS: USB
PA2: Buzzer