I would like to ask a question relating to the following communication setup:
STM32 -- Arduino Pro Mini -- ADNS3080 sensor
The interface between STM32 -- Arduino is I2C and the interface between Arduino Pro Mini--ADNS3080 is SPI.
I have tested the communication between the STM32 and the Arduino Pro Mini, and between the Arduino Pro Mini and the ADNS3080 sensor. Both of them work fine; I can successfully send and receive data in both cases.
Now, I want to read the register of the ADNS3080 sensor using the STM32. First, I start an I2C communication between the STM32 and the Arduino Pro Mini, then I send the register address of the ADNS3080 to the Arduino Pro Mini. The Arduino Pro Mini reads the register address and in the same function starts a communication, using SPI, with the ADNS3080 sensor.
But I receive I2C errors in the STM32. Is it possible to use I2C and SPI at the same time? Do I have to introduce delays between the I2C and SPI commands?