Hi ST community.
I am trying to control a 7 seven
segments display (HT16K33), it has I2C as interface.
If the Display is connected to Arduino
2560 board, it works, but when STM32F103C8 is controlling it, the display is
not working.
after i tested all commands sent to
HT16K33 by I2C, I try to do same from STM32, but it did not work.
So I decide to connected STM32 with
Arduino, running an small scketch written by (Nicholas Zambetti <http://www.zambetti.com) i saw that:
· when STM32 send data, more than bye per Start/Stop procedure, Arduino received and showed the right informacion (TX and RX are the same).
· when STM32 send justa one byte per Start/Stop procedure, the information received on Arduino side, it is not the same send from STM32
· As HT16K33 needs to receive configuration commands byte per byte and Data to be displays can be send one or more bytes per start/stop procedure, so as STM32 looks like is not sending one byte correctly, the display is not working (this is my assumption)
Pictures 1 and 2:
I am using an STM32F103C8 BluePill board,
HT16K33 breakout board and for testing purpose arduino 2560 board.
STM32Cube is used too (Version: 1.6.0)
I have 2 STM32F103c8 bluePill boards and
both are working in the same way
Resume:
STM32f103C8 send data using i2C, if more
than Byte is send using HAL_I2C_Master_Transmit, Data is sent and received
correctly in remote Device (my tester is Arduino), please see picture N°1.
if HAL_I2C_Master_Transmit send one
byte, Arduino ( and HT16K33 too) are not getting the right data sent, please
see picture N°2
Some can help/drive me to solve this
issue, please.
Any comments/recommendations are
welcome.
I apologize for my basic English
Best regards
Alfredo (from Argentina)
