Maxim-integrated 73S12xxF Software Manual de usuario descargar pdf (Pagina 23)

UG_12xxF_016 73S12xxF Software User Guide

Rev. 1.50 23

EVENT_VDDF 0x00000400

EVENT_I2C 0x00000800

EVENT_ANALOG 0x00001000

EVENT_USR0 0x00002000

EVENT_USR1 0x00004000

EVENT USR2 0x00008000

EVENT_USR3 0x00010000

EVENT_ES 0x00020000

ExitOn: Output parameter

If KEY_ERR_SMARTCARD_xxx return code, it specifies which SmartCard event

occurred. Bit[n] corresponds to ICC[n]. If KEY_ERR_EVENT, it specifies which

EVENT occurred.

KeyCode: Output parameter

Specifies the KeyCode that was pressed. The KeyCode is equal to

((row-1) * KeypadCols) + (col-1), where column ranges from 1 to KeypadCols and

row ranges from 1 to KeypadRows.

Return Codes

KEY_OK Successful operation: a valid key was pressed.

KEY_ERR_TIMEOUT TimeOut error.

KEY_ERR_SMARTCARD_INSERTED SmartCard insertion detected.

KEY_ERR_SMARTCARD_REMOVED SmartCard removal detected.

KEY_ERR_EVENT

ScanOrder can be any permutation of the values 0,1,2,3 and 4. If an unscrambled order is

desired, set ScanOrder = 0x4688. The scrambling algorithm is handled by the caller. If the

event was a Smart Card event exit, use ICC_Status() to discover which card caused the exit.

4.2.2 LCD Driver API – Available with all 73S12xxF Devices

The LCD interface supports a generic external LCD controller and uses USR I/O that is accessed by the

LCD driver API. The LCD calls manage a generic 7-bit (4-bit data bus) interface to the external LCD

controller. For the 73S1215F Evaluation Board, where the MDL-16265 LCD is used, USR pins 0-3 are

used for the 4-bit data bus, USR pins 4, 5 and 6 are used for E, RW and RS, respectively).

The USR IO pins can be used for several different features such as LCD, I2C addressing for external

slots and a Serial RS232 interface to a Windows XP host depending on the TSC evaluation board and

the application firmware being used. Care must be taken by the application to make sure there is no

conflicting usage. The LCD API includes:

• LCD_Init () (page 23)

• LCD_Command () (page 24)

• LCD_Data_Write () (page 24)

• LCD_Data_Read () (page 24)

LCD_Init ()

Purpose Initialize the LCD interface. After initialization the Display will be ON and cleared. A

block cursor will be at the home position.

Synopsis Void LCD_Init ( void );

Parameters None.

Return Codes None.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 92 93

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