1/* $NetBSD: pcf8584reg.h,v 1.2 2016/01/03 17:32:17 jdc Exp $ */ 2 3/* Written by Tobias Nygren. Released into the public domain. */ 4 5/* SCL clock frequency */ 6#define PCF8584_SCL_90 0 /* 90 kHz */ 7#define PCF8584_SCL_45 1 /* 45 kHz */ 8#define PCF8584_SCL_11 2 /* 11 kHz */ 9#define PCF8584_SCL_1_5 3 /* 1.5 kHz */ 10 11/* Internal clock frequency */ 12#define PCF8584_CLK_3 0 /* 3 MHz */ 13#define PCF8584_CLK_4_43 0x10 /* 4.43 MHz */ 14#define PCF8584_CLK_6 0x14 /* 6 MHz */ 15#define PCF8584_CLK_8 0x18 /* 8 MHz */ 16#define PCF8584_CLK_12 0x1C /* 12 MHz */ 17 18/* Control register bits (write only) */ 19#define PCF8584_CTRL_ACK (1<<0) /* send ACK */ 20#define PCF8584_CTRL_STO (1<<1) /* send STOP */ 21#define PCF8584_CTRL_STA (1<<2) /* send START */ 22#define PCF8584_CTRL_ENI (1<<3) /* Enable Interrupt */ 23#define PCF8584_CTRL_ES2 (1<<4) /* alternate register selection */ 24#define PCF8584_CTRL_ES1 (1<<5) /* alternate register selection */ 25#define PCF8584_CTRL_ESO (1<<6) /* Enable Serial Output */ 26#define PCF8584_CTRL_PIN (1<<7) /* Pending Interrupt Not */ 27 28/* Status register bits (read only) */ 29#define PCF8584_STATUS_BBN (1<<0) /* Bus Busy Not */ 30#define PCF8584_STATUS_LAB (1<<1) /* Lost Arbitration */ 31#define PCF8584_STATUS_AAS (1<<2) /* Adressed As Slave */ 32#define PCF8584_STATUS_LRB (1<<3) /* Last Received Bit (NAK+bcast det.) */ 33#define PCF8584_STATUS_BER (1<<4) /* Bus error */ 34#define PCF8584_STATUS_STS (1<<5) /* external STOP condition detected */ 35#define PCF8584_STATUS_INI (1<<6) /* 0 if initialized */ 36#define PCF8584_STATUS_PIN (1<<7) /* Pending Interrupt Not */ 37 38#define PCF8584_REG_S0_ 0 /* S0' own address */ 39#define PCF8584_REG_S2 PCF8584_CTRL_ES1 /* clock register */ 40#define PCF8584_REG_S3 PCF8584_CTRL_ES2 /* Interrupt vector */ 41 42#define PCF8584_CMD_START (PCF8584_CTRL_PIN | PCF8584_CTRL_ESO | \ 43 PCF8584_CTRL_STA | PCF8584_CTRL_ACK) 44#define PCF8584_CMD_STOP (PCF8584_CTRL_PIN | PCF8584_CTRL_ESO | \ 45 PCF8584_CTRL_STO | PCF8584_CTRL_ACK) 46#define PCF8584_CMD_REPSTART (PCF8584_CTRL_ESO | PCF8584_CTRL_STA | \ 47 PCF8584_CTRL_ACK) 48#define PCF8584_CMD_IDLE (PCF8584_CTRL_PIN | PCF8584_CTRL_ESO | \ 49 PCF8584_CTRL_ACK) 50#define PCF8584_CMD_NAK (PCF8584_CTRL_ESO) 51