Using I2C Serial Interface Module For 1602 LCD Display

Hardware requirements:

1. STM32F030F4-DEV V1.0

Device	configuration
MCU	STM32F030F4P6
HSE	8MHz
USART1	TX - PA2, RX - PA3
I2C1	SCL - PA9, SDA - PA10
LED	PA4

2. Serial LCD I2C Module - PCF8574T

• Pin assignment

PCF8574T	1602 LCD
P0	RS
P1	RW
P2	E
P3	BL
P4	D4
P5	D5
P6	D6
P7	D7

3. Two 1602 LCD displays:

• Primary display(I2C address: 0x3e) will show:
  1. OS name and version: ChibiOS/RT 4.0.0
  2. System ticks
• Secondary display(I2C address: 0x3f) will show:
  1. Board name: STM32F030F4-DEV
  2. Unique Device ID (12 bytes)

Software requirements:

• ChibiOS/RT: Commit ID: af64942

For detail info, please refer:

https://www.brobwind.com/archives/1324