AN3985 datasheet(17/105 Pages) STMICROELECTRONICS

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AN3985

CR95HF low level layer

Doc ID 022255 Rev 2

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4.3.1

Command functions

CR95HF_IDN function

This function sends an IDN command to the CR95HF device. It returns its version number.

CR95HF_Echo function

This function sends an EchoCode command to the CR95HF which returns an Echo code

response (0x55). The Echo function checks that communications can be started between

the MCU and the CR95HF.

Table 11.

CR95HF layer advanced functions

Function name

Description

CR95HF_Modify_Baud_Rate

Changes the UART baud rate of MCU and

CR95HF.

CR95HF_Idle_Detector_Calibration

Carries out a calibration for tag detector mode.

CR95HF_Wait_Wake_up_From_Idle

Waits for CR95HF to exit the idle state and retrieve

what caused the wake-up.

CR95HF_Wake_up_CR95HF

Wakes up CR95HF when exists idle mode.

Table 12.

CR95HF_IDN function description

Prototype

u8 CR95HF_IDN (CR95HF_ResponseReceiving* Response);

Input parameter

None

Output parameter

Response: pointer on the response structure

Return parameter

CR95HF_SUCCESS_CODE: The command is successful.

CR95HF_ERROR_CODE: The command failed.

Table 13.

CR95HF_Echo function description

Prototype

u8 CR95HF_Echo (void);

Input parameter

None

Output parameter

None

Return parameter

CR95HF_SUCCESS_CODE: The command is successful.

CR95HF_ERROR_CODE: The command failed.

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