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i2c on u boot for beagle

rama saketha
Prodigy 50 points

Hello,

We are using  i2c_read, i2c_write to talk to EEPROM in the U boot terminal. Somehow the read and write doesnot seem to work properly. Is there any other initialisations that needs to  be done for these functions to execute apart from i2c_init.

Also how to do the same from shell prompt.

  • 0
    Guru 11260 points

    Hi,

    Did you define the following in your board file,

    #define CONFIG_SOFT_I2C /* Always defined for software I2C support */
#define I2C_INIT /* initialize your software i2c */
#define I2C_ACTIVE /* activate SDA */
#define I2C_TRISTATE /* deactivate SDA */
#define I2C_READ /* read SDA */
#define I2C_SDA(bit) /* set SDA to <bit> */
#define I2C_SCL(bit) /* set SCL to <bit> */
#define I2C_DELAY /* delay some time */
 
#define CONFIG_SYS_I2C_SPEED /* default speed (in HZ) */
#define CONFIG_SYS_I2C_SLAVE 0
    And #define CONFIG_CMD_I2C for CMD

    For setting the above look into some confiig files and set yours appropriately, and you should get going


    Thx,
    --Prabhakar Lad