L1Transport Base Class

The base class for all L1 transport layer implementations. Platform-specific transports inherit from this class and implement the abstract low-level methods.

class tropicsquare.transports.L1Transport

Bases: object

Base class for L1 transport layer.

Platform-specific classes implement only abstract low-level methods.

send_request(request_data)

Send request to chip and return response bytes.

Parameters:

request_data (bytes) – Complete request frame (with CRC)

Returns:

Response bytes

Return type:

bytes

get_response()

Get response from chip with automatic retry logic.

Returns:

Response data from chip

Return type:

bytes

Raises:

• TropicSquareAlarmError – If chip is in alarm state

• TropicSquareCRCError – If CRC validation fails

• TropicSquareTimeoutError – If chip remains busy after max retries

• TropicSquareError – On other communication errors

Abstract Methods

Subclasses must implement these methods:

• _transfer() - Bidirectional SPI transfer

• _read() - SPI read operation

• _cs_low() - Activate chip select (optional)

• _cs_high() - Deactivate chip select (optional)

Implemented Methods

The base class provides:

• send_request() - Send request to chip

• get_response() - Get response with retry logic

See Also

• SPI Transport - SPI transport implementation

• UART Transport - UART transport implementation

• Network-SPI Transport - Network-SPI transport

• TCP Transport - TCP transport for model server

• L2 Protocol Layer - L2 protocol using L1Transport