NAME¶
twi.h -
SYNOPSIS¶
Macros¶
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
Author¶
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