Getting Started with MCP3008 ADC and SPI on STM32

You can access the source code files via this link.

In this project, we will explore how to use an STM32 microcontroller to communicate with an MCP3008 analog-to-digital converter (ADC) using the Serial Peripheral Interface (SPI) protocol.

The MCP3008 has 8 input channels, which means it can read up to 8 analog signals simultaneously. It has a resolution of 10 bits, which means it can convert analog signals into 1024 discrete digital values. The MCP3008 operates using a supply voltage of 2.7V to 5.5V, making it compatible with a wide range of microcontrollers and other digital devices.

The MCP3008 ADC communicates with a microcontroller using SPI, which is a synchronous Serial Peripheral Interface . SPI uses a clock, data input, data output, and chip select (CS) line to transfer data between devices. The MCP3008 selects the input channel to read using the chip select line and sends the converted digital value back to the microcontroller using the data output line.

Overall, the MCP3008 is a useful component for projects that involve reading analog signals, such as temperature sensors, light sensors, or potentiometers. It is relatively easy to use and provides accurate digital readings of analog signals.

Step One:

Open CubeMX & Create New Project Choose The Target MCU STM32F103C6 & Double-Click Its Name

• Go To The Clock Configuration & Set The System Clock To 8MHz
• Configure The GPIO Pins [PB3..PB9] as Output Pin (STM32 LCD Interface)
• Configure The GPIO Pin PA8 (CS) as Output Pin
• In the Categories tab, select the SPI1 & Full-Duplex Master
• Generate The Initialization Code & Open The Project In CubeIDE
• Write The Application Layer Code

Note : You can find the other files in the code section

In file name :main.c

Step Two:

• Open Proteus & Create New Project and click next

• Click on Pick Device
• Search for STM32F103C8 & MCP3008 & TORCH_LDR & RES

• Click on Virtual Instrumets Mode then choose DCVOLTMETER

• Click on Terminal Mode then choose (DYNAMIC&POWER &GROUND)

• finally make the circuit below and start the simulation

That's all!

If you have any questions or suggestions don't hesitate to leave a comment below