LCD-1602 support - Githubissues

seanshpark / hwhobby

Hobby of small devices

Apache License 2.0

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Closed seanshpark closed 5 years ago

seanshpark commented 5 years ago

Support LCD-1602 with HD44780 controller by I2C

Modules to add: two in one

Interface for this time is I2C not GPIO.

seanshpark commented 5 years ago

I2C client detect

i2cdetect -y 1

seanshpark commented 5 years ago

Issue: i2cdetect program dumps very slow after using bcm2835_i2c_xxx()

Issue i2cdetect show the device has vanished after using bcm2835_i2c_xxx()

seanshpark commented 5 years ago

This device has logically same level of hwmodule that calls another hwmodule.

CMake needs order of inclusion.
not clear how to make i2clcd call lcd1602 or is it like lcd1602 using i2c bus

seanshpark commented 5 years ago

lcd1602 uses i2clcd module and hd44780

seanshpark commented 5 years ago

For RPi is done. Continue with STM32F103.

seanshpark commented 5 years ago

Blue backlight works with +5V. I2C interface with RPi needs voltage shifter

seanshpark commented 5 years ago

STM32F103 !

Need I2C library to encode byte to two SCL/SDA GPIO pins.

seanshpark commented 5 years ago

I2C with STM32F103 isn't simple cause of debugging with on-board LED.