UM0563 datasheet(22/46 Pages) STMICROELECTRONICS

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L9952GXP software driver functions

UM0563

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Table 15.

L9952drv_LinSetup

Service name

L9952drv_LinSetup

Syntax

Void L9952drv_LinSetup

(

L9952drv_LinSetupType value

)

Service ID

Sync/async

Asynchronous

Reentrancy

Non reentrant

Parameters (in)

Parameter value LIN setup values for pull up, on bits 0..2, which enables

dominant TxD timeout and LIN slope

Return value

None

Description

This function sets the LIN configuration.

The registers affected are the CR2.6, 2.7, 2.18(1)(2)

1. This function updates the software driver’s internal copy of control register 2 and sends it immediately to

the L9952GXP via the SPI.

2. This function refreshes the software driver’s internal copy of status 0 register from the L9952GXP via the

SPI.

Caveats

This function waits until the data are completely transferred to the L9952GXP

via the SPI.

Configuration

None

Table 16.

L9952drv_ClearStatusRegisters

Service name

L9952drv_ClearStatusRegisters

Syntax

Void L9952drv_ClearStatusRegisters

(

void

)

Service ID

Sync/async

Asynchronous

Reentrancy

Non reentrant

Parameters (in)

None

Return value

None

Description

This function clears the content of both L9952GXP status registers

The register affected is the CR1.21(1)(2)

1. This function updates the software driver’s internal copy of control register 1 and sends it immediately to

the L9952GXP via the SPI. It then changes the internal copy of control register 1 and sends it again to the

L9952GXP via the SPI.

2. This function refreshes the software driver’s internal copy of status 1 register from the L9952GXP via the

SPI.

Caveats

This function waits until the data are completely transferred to the L9952GXP

via the SPI.

Configuration

None

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