7.1.1.18ICEGD_ESCAPE_I2C_ACCESS

 

Input Data Structure

Output Data Structure

Notes

 

 

 

 

 

esc_i2c_access_t

unsigned char

In case of read operation, data is returned in output buffer.

 

Write operation data is retrieved from the esc_i2c_access_t

 

 

 

input buffer.

 

 

 

 

Description

This escape code is used to access I2C. It can implement a read or write operation by setting the mode.

Input Data Structure Definition

Please refer icegd_public_escape.h for details about esc_i2c_access_t;

Example

esc_i2c_config_t i2c_config; esc_i2c_access_t i2c_access; unsigned char data; unsigned char data2;

memset(&i2c_config, 0, sizeof(esc_i2c_config_t)); memset(&i2c_access, 0, sizeof(esc_i2c_access_t));

//the data is only for cx892.

//please refer to special documents for different cards i2c_config.bus = 4;

i2c_config.dab = 0x88; i2c_config.speed = 200;

/* Configure I2C Bus access */ ExtEscape(

Hdc,

ICEGD_ESCAPE_I2C_CONFIG, sizeof(esc_i2c_config_t), (LPCSTR)&i2c_config,

0,

NULL);

i2c_access.addr = 0x54;

i2c_access.mode = INTEL_I2C_MODE_READ;

/* Read a character from address 0x54 */ ExtEscape(

Hdc,

ICEGD_ESCAPE_I2C_ACCESS, sizeof(esc_i2c_access_t), (LPCSTR)&i2c_access, sizeof(unsigned char), (LPSTR)&data);

/* Write data 140 back */

i2c_access.mode = INTEL_I2C_MODE_WRITE; i2c_access.data = 140;

ExtEscape(

Hdc,

ICEGD_ESCAPE_I2C_ACCESS, sizeof(esc_i2c_access_t), (LPCSTR)&i2c_access, sizeof(unsigned char), (LPSTR)&data);

printf("%d\n",data);

48Intel® Digital Set Top Box Display Driver User’s Guide for Microsoft* Windows* CE 5.0

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Intel 82830M GMCH, 82854 GMCH manual ICEGDESCAPEI2CACCESS

82830M GMCH, 82854 GMCH specifications

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