How to program STM32 -Using I2C to control SAA1064 ;4-digits LED driver Hello,

[fifi]

Hello,

I would like to program the STM32 to control the circuit SAA1064 by I2C, using the STM32cubeIDE and HAL functions (HAL_I2C_Mem_Write,HAL_I2C_Master_Transmit, HAL_I2C_IsDeviceReady). then with the function "HAL_I2C_IsDeviceReady" shows that : the I2C communication is OK,  but I can't send data to the SAA1064 to display the digits on 7segments.

thank you for helping 

[Peter BENSCH]

Welcome @fifi, to the community!

Please show us the programme you have written so far. Are there also pull-ups on the lines?

Regards
/Peter