SECC GreenPHY Solution: Bridging STM32MP135 SOM to V2G Industry Advancement

With the rapid development of Vehicle-to-Grid (V2G) technology, efficient communication between charging stations and electric vehicles has become crucial for smart energy management. As the communication control core of charging stations, the compatibility between the SECC and power line carrier communication chips is particularly important. This article shares practical experience in debugging the Lianxintong MSE102x GreenPHY chip based on the MYIR's MYC-YF13X STM32MP135-based System-On-Module (SOM), providing valuable reference for V2G communication development.

Introduction to MSE102x Chip

The Lianxintong MSE102x series is a GreenPHY power line carrier (PLC) communication chip designed for EV charging communication and smart energy management. It supports both RMII and SPI host interfaces, enabling flexible selection based on application needs. This article details how to drive the MSE102x using these two distinct interface methods.

MSE102x System Diagram

Solution 1: Debugging the RMII interface

Hardware connection:

The MSE102x is connected to the ETH1 controller of the MYC-YF13X SOM via an RMII interface, enabling direct communication at the MAC layer.

Key steps for software configuration:

1. Modification of the device tree

2. Pin Multiplexing Configuration

Test result:

The system successfully identified the eth1 network device and conducted communication tests using standard network tools, laying a stable network foundation for V2G communication.

Solution 2: SPI Interface Debugging

Hardware connection:

The MSE102x is connected as an SPI slave to the SPI1 interface of the MYC-YF13X SOM, making it suitable for application scenarios that require flexible PCB layout.

Key steps for software configuration:

1. SPI device tree configuration

2. SPI Pin Configuration

Test result:

Upon system boot, the MSE102x is correctly identified and the corresponding network interface is generated, allowing a V2G communication connection through the PLC link.

Through the successful adaption of the MYC-YF13X SOM with the MSE102x, we have developed a comprehensive SECC GreenPHY communication solution. This solution not only provides technical support for V2G applications but also demonstrates the flexibility and reliability of MYIR's SOM products in the Energy internet sector.