Preface:: This project is for entertainment only!! !

1.

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1.

The emergence of the salted fish price tag allows us to buy an ink screen for fun at an affordable price. Compared with the 2.9-inch one, the 4.2-inch one can be taken apart perfectly so that you don’t have to use the MSP430G2553 that comes with it, and you can even replace it with a powerful one. STM32F401CC~~(Consumption of inventory!)~~.

• I have to say that the built-in case feels good and is suitable for playing with.
• 4.2-inch black and white hand-painted grayscale
• 

Put a 2.9-inch picture (the program has been rewritten) (violent 16-level grayscale) and a 4.2-inch picture

Onboard resources

• Powered by a button battery (3V) consistent with the original design, up to 4 CR2450.
• 2-wire SWD debugging interface led by test point method
• USART interface introduced by test point method
• 2 GPIOs introduced by test point method
• STM32F401CC microcontroller
• HTU21D humidity and temperature sensor (several models have the same package and can be replaced)
• The billions of electric dragons on the ink screen
• HTU21D is powered by the IO output of the mcu, which can be turned off to further save power.
• The power supply of the ink screen is controlled by a PMOS via the IO of the MCU, which can be turned off to further save power.
• 32768Hz LSE crystal oscillator, considering the button battery power supply and RTC accuracy

use

• Can be used to learn program development of stm32 microcontroller
• Make a decorative brand?
• Can also be used as a calendar and thermometer.

Physical map (the surveying and mapping this time turned out to be so appropriate, amazing!)

Salted fish 5.83 inches successfully lit up, you can make a brand again! Driver IC: UC8159C;By the way, I always feel that the board he came with was drawn wrong. The 8th pin BS is hanging in the air, and the 7th pin is pulled up to VCI. Should it be the 8th pin that is pulled up? Causing a reaction or not is like drawing a card; If you bought it and saw this paragraph, you can try to fly to GND.

Test program, gooddisplay website routine CTRL+C

The grayscale program is sorted and uploaded.

1. The idea of ​​grayscale implementation comes from these two Figures in the PDF of SSD1619.

As shown below