AN452

4

Rev. 0.1

2. PHY API

2.1. PHY Layer Modules and File Organization

2.2. Functions

2.2.1. MbusPhyInitRegisters

Prototype:

PHY_STATUS MbusPhyInitRegisters(void);

Parameters:

none

Returns:

PHY_STATUS (U8) status:

PHY_STATUS_SUCCESS

PHY_STATUS_ERROR_INVALID_STATE

Description:

The PhyInitRegisters() function should be called after resetting the MCU, from the main() function, before using

any other PHY functions. This function will initialize the internal PHY registers in the MCU memory to their default

values. This function does not use the SPI or radio hardware.

It must be called while the radio is in shutdown mode. If the PHY is not in the shutdown state, this function will

return the error code PHY_STATUS_ERROR_INVALID_STATE.

Table 1. PHY Layer Modules and File Organization

File Name

Description

Comments

MbusPhy.h

Physical Layer header file

MbusPhy.c

Physical Layer c file

MbusPhy_const.h

Physical Layer constants header file

MbusPhy_const.c

Physical Layer constants c file

Code constants used for Radio con-

figuration

hardware_defs.h

Hardware definitions file

hardware specific macros

MbusPhy_def.h

M-Bus definitions file

M-Bus build and configuration

options

si443x_B1.h

Si4432 header file

compiler_defs.h

Compiler definitions file

cross compiler macros

C8051F930_defs.h

F930 header file