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Add lots of useful comments about I2C addresses.

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This commit is contained in:
László Monda
2016-10-12 00:24:28 +02:00
parent 2dd260e84b
commit d65e846502
1 changed files with 14 additions and 5 deletions
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19
shared/i2c_addresses.h
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@@ -1,12 +1,21 @@
#ifndef __I2C_ADDRESSES_H__
#define __I2C_ADDRESSES_H__
// 7-bit I2C addresses
// 7-bit I2C addresses - see http://www.i2c-bus.org/addressing/
#define I2C_ADDRESS_LEFT_KEYBOARD_HALF 8
#define I2C_ADDRESS_LED_DRIVER_LEFT 0b1110100
#define I2C_ADDRESS_LED_DRIVER_RIGHT 0b1110111
// General call / Start byte 0b0000000
// CBUS address 0b0000001
// Reserved for different bus formats 0b0000010
// Reserved for future purposes 0b0000011
// High-Speed master code 0b00001XX
#define I2C_ADDRESS_LEFT_KEYBOARD_HALF 0b0001000
#define I2C_ADDRESS_LED_DRIVER_LEFT 0b1110100
// LED driver / touchpad 0b1110101
// LED driver / touchpad 0b1110110
#define I2C_ADDRESS_LED_DRIVER_RIGHT 0b1110111
// Touchpad 0b00001XX
// 10-bit slave addressing 0b11110XX
// Reserved for future purposes 0b11111XX
#define IS_I2C_LED_DRIVER_ADDRESS(address) \
(I2C_ADDRESS_LED_DRIVER_LEFT <= (address) && (address) <= I2C_ADDRESS_LED_DRIVER_RIGHT)