1 MCU, 2 WIZnet Chips: Dual SPI Networking on STM32
This project utilizes an W5100S-EVB(STM32 MCU Board) to manage 2 W5100S chips via separate SPI interfaces, enabling concurrent network operations from a single
WIZnet - W5100S-EVB
x 1
WIZnet - WIZnet Ethernet HAT
x 1
Controlling Two W5100S Ethernet HATs with STM32 MCU
Objective: Utilize the STM32 MCU board (W5100S-EVB) to activate an additional SPI channel and connect two WIZnet Ethernet HATs (W5100S), creating a project that controls two W5100S chips with a single MCU.
Implementation Approach: Use the Chip Select (CS) pin alternately to switch between the Ethernet HATs, enabling communication between the MCU and both W5100S chips.
SPI Configuration:
- SPI1:
- Pins PA5, PA6, and PA7 (SCK, MISO, MOSI) from GPIOA.
- Connected to CHIP2 (WIZCHIP2).
- CS: GPIOD pin 2, Reset: GPIOC pin 7.
- SPI2:
- Pins PB13, PB14, and PB15 (SCK, MISO, MOSI) from GPIOB.
- Connected to CHIP1 (WIZCHIP1).
- CS: GPIOD pin 7, Reset: GPIOD pin 8.
Result: Successfully connected two Ethernet ports to a single MCU and conducted a loopback test without any data loss.
Details and Code: Refer to the GitHub link for full implementation details.
STM32_Dual_W5100S