Python exemplarisch

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GPIO Header (40 pin)

 

 

SMBus Function Summary

addr always 7 bit I2C address

int8 = integer, but only 8 lower bits used
long8 = long, but only 8 lower bits used
int16 = int, but only 16 lower bits used
long16 = long, but only 16 lower bits used

Function	Description	Parameters	Return value
write_quick(addr)	Quick transaction	int8 addr	long8
read_byte(addr)	Read one byte with no command	int8 addr	long8
write_byte(addr, data)	Write one byte	int8 addr, int8 data	long8
read_byte_data(addr, cmd)	Read one byte with command	int8 addr, int8 cmd	long8
write_byte_data(addr, cmd, data)	Write one byte with command	int8 addr, int8 cmd, int8 data	long8
read_word_data(addr, cmd)	Read two bytes with command	int8 addr, int8 cmd	long16
write_word_data(addr, cmd, data)	Write two bytes with command	int8 addr, int8 cmd, int16 data	long8
read_block_data(addr, cmd)	Read block of data with command	int8 addr, int8 cmd	[long8, long8,...] (list of long8)
write_block_data(addr, cmd, data)	Write block of data with command	int8 addr, int8 cmd, [int8, int8,... ] data	None
process_call(addr, cmd, data)	Process call transaction	int8 addr, int8 cmd, int8 data	long8
block_process_call(addr, cmd, data)	Block process call transaction	int8 addr, int8 cmd, [int8, int8,...] data	[long8, long8,...]
read_i2c_block_data(addr, cmd)	Read block with I2C access mode	int8 addr, int8 cmd	[long8, long8,...]
write_i2c_block_data(addr, cmd, data)	Wrtie block with I2C access mode	int8 addr, int8 cmd, [int8, int8,...] data	None