AVR does not have SPI, How to implement in Software to communicate with ADC?

Projects Networking, Protocols, and Devices
1

I am quite new to this topic. I don't have the luxuary to use any SPI registers to send and receive data in Atmel 328 chip. I wanna read data from 4 light sensors which are connected to analog to digital convertor TLC541IN. I wish to read data from light sensors and implement a light following robot. How to implement SPI suing C/C++ without using the built in shift registers dedicated for SPI.

Your help is greatly appreciate in advance.

2

What Atmel chip are you using?

...R

3

Atmel328. SPI ports are currently occupied with the motor shilled.

4

Do you mean that the motor shield uses SPI, or simply that it prevents access to the SPI pins?

If the latter it is a good reason not use the shield :slight_smile:

Post a link to the datasheet for the shield you are using.

...R