twi.h File Reference

このファイルのソースコードを参照する

定義
TWSR values
Mnemonics: TW_MT_xxx - master transmitter TW_MR_xxx - master receiver TW_ST_xxx - slave transmitter TW_SR_xxx - slave receiver
#define	TW_START   0x08
#define	TW_REP_START   0x10
#define	TW_MT_SLA_ACK   0x18
#define	TW_MT_SLA_NACK   0x20
#define	TW_MT_DATA_ACK   0x28
#define	TW_MT_DATA_NACK   0x30
#define	TW_MT_ARB_LOST   0x38
#define	TW_MR_ARB_LOST   0x38
#define	TW_MR_SLA_ACK   0x40
#define	TW_MR_SLA_NACK   0x48
#define	TW_MR_DATA_ACK   0x50
#define	TW_MR_DATA_NACK   0x58
#define	TW_ST_SLA_ACK   0xA8
#define	TW_ST_ARB_LOST_SLA_ACK   0xB0
#define	TW_ST_DATA_ACK   0xB8
#define	TW_ST_DATA_NACK   0xC0
#define	TW_ST_LAST_DATA   0xC8
#define	TW_SR_SLA_ACK   0x60
#define	TW_SR_ARB_LOST_SLA_ACK   0x68
#define	TW_SR_GCALL_ACK   0x70
#define	TW_SR_ARB_LOST_GCALL_ACK   0x78
#define	TW_SR_DATA_ACK   0x80
#define	TW_SR_DATA_NACK   0x88
#define	TW_SR_GCALL_DATA_ACK   0x90
#define	TW_SR_GCALL_DATA_NACK   0x98
#define	TW_SR_STOP   0xA0
#define	TW_NO_INFO   0xF8
#define	TW_BUS_ERROR   0x00
#define	TW_STATUS_MASK
#define	TW_STATUS   (TWSR & TW_STATUS_MASK)
R/~W bit in SLA+R/W address field.
#define	TW_READ   1
#define	TW_WRITE   0

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詳しい説明