// ---------------------------------------------------------------------------- // ATMEL Microcontroller Software Support - ROUSSET - // ---------------------------------------------------------------------------- // The software is delivered "AS IS" without warranty or condition of any // kind, either express, implied or statutory. This includes without // limitation any warranty or condition with respect to merchantability or // fitness for any particular purpose, or against the infringements of // intellectual property rights of others. // ---------------------------------------------------------------------------- // File Name : at91rm9200_i2c.h // Object : AT91RM9200 / TWI definitions // Generated : AT91 SW Application Group 12/03/2002 (10:48:02) // // ---------------------------------------------------------------------------- #ifndef AT91RM9200_TWI_H #define AT91RM9200_TWI_H // ***************************************************************************** // SOFTWARE API DEFINITION FOR Two-wire Interface // ***************************************************************************** #ifndef __ASSEMBLY__ typedef struct _AT91S_TWI { AT91_REG TWI_CR; // Control Register AT91_REG TWI_MMR; // Master Mode Register AT91_REG TWI_SMR; // Slave Mode Register AT91_REG TWI_IADR; // Internal Address Register AT91_REG TWI_CWGR; // Clock Waveform Generator Register AT91_REG Reserved0[3]; // AT91_REG TWI_SR; // Status Register AT91_REG TWI_IER; // Interrupt Enable Register AT91_REG TWI_IDR; // Interrupt Disable Register AT91_REG TWI_IMR; // Interrupt Mask Register AT91_REG TWI_RHR; // Receive Holding Register AT91_REG TWI_THR; // Transmit Holding Register AT91_REG Reserved1[50]; // AT91_REG TWI_RPR; // Receive Pointer Register AT91_REG TWI_RCR; // Receive Counter Register AT91_REG TWI_TPR; // Transmit Pointer Register AT91_REG TWI_TCR; // Transmit Counter Register AT91_REG TWI_RNPR; // Receive Next Pointer Register AT91_REG TWI_RNCR; // Receive Next Counter Register AT91_REG TWI_TNPR; // Transmit Next Pointer Register AT91_REG TWI_TNCR; // Transmit Next Counter Register AT91_REG TWI_PTCR; // PDC Transfer Control Register AT91_REG TWI_PTSR; // PDC Transfer Status Register } AT91S_TWI, *AT91PS_TWI; #endif // -------- TWI_CR : (TWI Offset: 0x0) TWI Control Register -------- #define AT91C_TWI_START ( 0x1 << 0) // (TWI) Send a START Condition #define AT91C_TWI_STOP ( 0x1 << 1) // (TWI) Send a STOP Condition #define AT91C_TWI_MSEN ( 0x1 << 2) // (TWI) TWI Master Transfer Enabled #define AT91C_TWI_MSDIS ( 0x1 << 3) // (TWI) TWI Master Transfer Disabled #define AT91C_TWI_SVEN ( 0x1 << 4) // (TWI) TWI Slave Transfer Enabled #define AT91C_TWI_SVDIS ( 0x1 << 5) // (TWI) TWI Slave Transfer Disabled #define AT91C_TWI_SWRST ( 0x1 << 7) // (TWI) Software Reset // -------- TWI_MMR : (TWI Offset: 0x4) TWI Master Mode Register -------- #define AT91C_TWI_IADRSZ ( 0x3 << 8) // (TWI) Internal Device Address Size #define AT91C_TWI_IADRSZ_NO ( 0x0 << 8) // (TWI) No internal device address #define AT91C_TWI_IADRSZ_1_BYTE ( 0x1 << 8) // (TWI) One-byte internal device address #define AT91C_TWI_IADRSZ_2_BYTE ( 0x2 << 8) // (TWI) Two-byte internal device address #define AT91C_TWI_IADRSZ_3_BYTE ( 0x3 << 8) // (TWI) Three-byte internal device address #define AT91C_TWI_MREAD ( 0x1 << 12) // (TWI) Master Read Direction #define AT91C_TWI_DADR ( 0x7F << 6) // (TWI) Device Address // -------- TWI_SMR : (TWI Offset: 0x8) TWI Slave Mode Register -------- #define AT91C_TWI_SADR ( 0x7F << 16) // (TWI) Slave Device Address // -------- TWI_CWGR : (TWI Offset: 0x10) TWI Clock Waveform Generator Register -------- #define AT91C_TWI_CLDIV ( 0xFF << 0) // (TWI) Clock Low Divider #define AT91C_TWI_CHDIV ( 0xFF << 8) // (TWI) Clock High Divider #define AT91C_TWI_CKDIV ( 0x7 << 16) // (TWI) Clock Divider // -------- TWI_SR : (TWI Offset: 0x20) TWI Status Register -------- #define AT91C_TWI_TXCOMP ( 0x1 << 0) // (TWI) Transmission Completed #define AT91C_TWI_RXRDY ( 0x1 << 1) // (TWI) Receive holding register ReaDY #define AT91C_TWI_TXRDY ( 0x1 << 2) // (TWI) Transmit holding register ReaDY #define AT91C_TWI_SVREAD ( 0x1 << 3) // (TWI) Slave Read #define AT91C_TWI_SVACC ( 0x1 << 4) // (TWI) Slave Access #define AT91C_TWI_GCACC ( 0x1 << 5) // (TWI) General Call Access #define AT91C_TWI_OVRE ( 0x1 << 6) // (TWI) Overrun Error #define AT91C_TWI_UNRE ( 0x1 << 7) // (TWI) Underrun Error #define AT91C_TWI_NACK ( 0x1 << 8) // (TWI) Not Acknowledged #define AT91C_TWI_ARBLST ( 0x1 << 9) // (TWI) Arbitration Lost // -------- TWI_IER : (TWI Offset: 0x24) TWI Interrupt Enable Register -------- // -------- TWI_IDR : (TWI Offset: 0x28) TWI Interrupt Disable Register -------- // -------- TWI_IMR : (TWI Offset: 0x2c) TWI Interrupt Mask Register -------- /* i2c Support for Atmel's AT91RM9200 Two-Wire Interface (c) Rick Bronson This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef AT91_I2C_H #define AT91_I2C_H #define AT91C_TWI_CLOCK 100000 #define AT91C_TWI_SCLOCK (10 * AT91C_MASTER_CLOCK / AT91C_TWI_CLOCK) #define AT91C_TWI_CKDIV1 (2 << 16) /* TWI clock divider. NOTE: see Errata #22 */ #if (AT91C_TWI_SCLOCK % 10) >= 5 #define AT91C_TWI_CLDIV2 ((AT91C_TWI_SCLOCK / 10) - 5) #else #define AT91C_TWI_CLDIV2 ((AT91C_TWI_SCLOCK / 10) - 6) #endif #define AT91C_TWI_CLDIV3 ((AT91C_TWI_CLDIV2 + (4 - AT91C_TWI_CLDIV2 % 4)) >> 2) #define AT91C_EEPROM_I2C_ADDRESS (0x50 << 16) #endif #endif