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4-digit "time" LED indicator based on TM1637
FOR STM32F051!!! WARNING! Only writing data!!! Can't read keys state.
GPIO
- I2C: PB6 (SCL) & PB7 (SDA)
- USART1: PA9/PA10
UART
115200N1, not more than 100ms between data bytes in command. To turn ON human terminal (without timeout) send "####".
Protocol
All commands are in brackets: [ command line ].
'[' clears earlier input; '\n', '\r', ' ', '\t' are ignored. All messages are asynchronous!
Commands
0..9 - send data A - display 'ABCD' G - get keyboard status (don't work) Hhex - display 'hex' as hex number Nnum - display 'num' as decimal number