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service:wince:drvlib:i2c:i2c_readrandom

I2C_ReadRandom

The function I2C_ReadRandom reads one byte from a given i2c-address.

int I2C_ReadRandom(     
  UCHAR SlaveAddress, 
  UCHAR SubAddress
); 
int i2c_RandomByteRead(     
  UCHAR SlaveAddress, 
  UCHAR SubAddress
); 

Parameters

SlaveAddress SlaveAddress of i2c-device.

SubAddress SubAddress of i2c-device.

Return Values

If the function succeeds, the return value is the byte read from the i2c-device.

If the function fails, the return value is -1.

Remarks

Issues following sequence:

  1. Lock
  2. Start
  3. SlaveAddress with write-bit
  4. SubAddress
  5. SlaveAddress with read-bit
  6. Read one byte
  7. Stop
  8. Unlock

This function calls I2C_Lock and I2C_Unlock to prevent multiple accesses to the i2c-bus. Don't lock access to i2c-bus prior to using this function!!

Requirements

OS Versions: Windows CE 4.2 and later.
Header: drvlib_app.h
Link Library: drvlib_app.lib

See Also

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service/wince/drvlib/i2c/i2c_readrandom.txt · Zuletzt geändert: 2009/09/16 10:42 von