Maxim-integrated 73S12xxF Software Manual de usuario descargar pdf (Pagina 60)

73S12xxF Software User Guide UG_12xxF_016

60 Rev. 1.50

USER_IO_Config()

Purpose Configure the direction for the USER IO pins.

Synopsis void USER_IO_ Config ( Unsigned char usrsrc, Unsigned char dir )

Parameters usrsrc: Input parameter

Corresponding USR pins to be configured as Input or Output. USRIO 0 through 7

will be configured according to the Dir parameter below.

Dir: Input parameter

Direction value (1=input, 0=output) for the selected pins.

Return Codes None.

USER_IO_Read()

Purpose Read the value of the USER IO pins.

Synopsis void USER_IO_Read ( OUT char *user_dir, OUT char *user_data );

Parameters User_dir: Output parameter

Direction value (1=input, 0=output) for the selected pins.

User_data: Output parameter

Value of the corresponding USER IO pins. All outputs will reflect the last value

written.

Return Codes None.

USER_IO_Write()

Purpose Write values to selected USER IO pins.

Synopsis Void USER_IO_Write ( IN char cUserIO, IN char cUserIOselect );

Parameters cUserIO: Input parameter

Values to write to selected USER IO pins.

cUserIOselect: Input parameter

A ‘1’ in the corresponding bit will enable writing to that USR pin provided it is

configured as an output.

Return Codes None.

4.2.14 External Interrupts API – Available with all 73S12xxF Devices

This API allows direct access to the two external interrupt pins (EXT3 and EXT2). These two interrupts

are only available as edge (falling/negative or rising/positive) sensitive. The API includes:

• INT2_Config() (page 60)

• INT2_Read() (page 61)

• INT3_Config() (page 61)

• INT3_Read() (page 61)

INT2_Config()

Purpose Configure External Interrupt 2.

Synopsis void INT2_Config ( Unsigned char Enable, Unsigned char Polarity );

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Maxim-integrated 73S12xxF Software Manual de usuario Pagina 60