HI I have a stm32f103c8t6. I connected data pin of LCD to portA.& RS,RW,EN to PB0...PB2 . but my lcd is really confused. everyTime i send "111" to LCD it shows "333". everyTime i send "qqq" to LCD it shows "sss". and ... i test my library on stm32f103zet.it worked!!! I even changed the resistor(91K ohm) on LCD to 75K ohm because of working voltage stm32f103c8t6(3.3V) but the problem didn't solve. can you Help me?
Thanks alot. my problem solved. D1's wire was cut.