diff options
Diffstat (limited to 'nuttx')
-rw-r--r-- | nuttx/arch/arm/src/lpc214x/chip.h | 4 | ||||
-rw-r--r-- | nuttx/arch/arm/src/lpc214x/lpc214x_i2c.h | 141 |
2 files changed, 143 insertions, 2 deletions
diff --git a/nuttx/arch/arm/src/lpc214x/chip.h b/nuttx/arch/arm/src/lpc214x/chip.h index eba3fa52b..9d7d963b1 100644 --- a/nuttx/arch/arm/src/lpc214x/chip.h +++ b/nuttx/arch/arm/src/lpc214x/chip.h @@ -163,13 +163,13 @@ /* I2C register offsets */ -#define LPC214X_I2C_ONSET_OFFSET 0x00 /* Control Set Register */ +#define LPC214X_I2C_CONSET_OFFSET 0x00 /* Control Set Register */ #define LPC214X_I2C_STAT_OFFSET 0x04 /* Status Register */ #define LPC214X_I2C_DAT_OFFSET 0x08 /* Data Register */ #define LPC214X_I2C_ADR_OFFSET 0x0c /* Slave Address Register */ #define LPC214X_I2C_SCLH_OFFSET 0x10 /* SCL Duty Cycle Register (high half word) */ #define LPC214X_I2C_SCLL_OFFSET 0x14 /* SCL Duty Cycle Register (low half word) */ -#define LPC214X_I2C_ONCLR_OFFSET 0x18 /* Control Clear Register */ +#define LPC214X_I2C_CONCLR_OFFSET 0x18 /* Control Clear Register */ /* Pin function select register offsets */ diff --git a/nuttx/arch/arm/src/lpc214x/lpc214x_i2c.h b/nuttx/arch/arm/src/lpc214x/lpc214x_i2c.h new file mode 100644 index 000000000..804dc0a11 --- /dev/null +++ b/nuttx/arch/arm/src/lpc214x/lpc214x_i2c.h @@ -0,0 +1,141 @@ +/************************************************************************************ + * arch/arm/src/lpc214x/lpc214x_i2c.h + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +#ifndef _ARCH_ARM_SRC_LPC214X_I2C_H +#define _ARCH_ARM_SRC_LPC214X_I2C_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include "chip.h" + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* Register address Offsets *********************************************************/ + +/* Defined in chip.h */ + +/* Register Address Definitions *****************************************************/ + +#define LPC214X_I2C0_CONSET (LPC214X_I2C0_BASE + LPC214X_I2C_ONSET_OFFSET) +#define LPC214X_I2C0_STAT (LPC214X_I2C0_BASE + LPC214X_I2C_STAT_OFFSET) +#define LPC214X_I2C0_DAT (LPC214X_I2C0_BASE + LPC214X_I2C_DAT_OFFSET) +#define LPC214X_I2C0_ADR (LPC214X_I2C0_BASE + LPC214X_I2C_ADR_OFFSET) +#define LPC214X_I2C0_SCLH (LPC214X_I2C0_BASE + LPC214X_I2C_SCLH_OFFSET) +#define LPC214X_I2C0_SCLL (LPC214X_I2C0_BASE + LPC214X_I2C_SCLL_OFFSET) +#define LPC214X_I2C0_CONCLR (LPC214X_I2C0_BASE + LPC214X_I2C_ONCLR_OFFSET) + +#define LPC214X_I2C1_CONSET (LPC214X_I2C1_BASE + LPC214X_I2C_ONSET_OFFSET) +#define LPC214X_I2C1_STAT (LPC214X_I2C1_BASE + LPC214X_I2C_STAT_OFFSET) +#define LPC214X_I2C1_DAT (LPC214X_I2C1_BASE + LPC214X_I2C_DAT_OFFSET) +#define LPC214X_I2C1_ADR (LPC214X_I2C1_BASE + LPC214X_I2C_ADR_OFFSET) +#define LPC214X_I2C1_SCLH (LPC214X_I2C1_BASE + LPC214X_I2C_SCLH_OFFSET) +#define LPC214X_I2C1_SCLL (LPC214X_I2C1_BASE + LPC214X_I2C_SCLL_OFFSET) +#define LPC214X_I2C1_CONCLR (LPC214X_I2C1_BASE + LPC214X_I2C_ONCLR_OFFSET) + +/* I2C register bit definitions *****************************************************/ + +/* Control Set Register (CONSET) */ + +#define I2C_CONSET_AA (1 << 2) /* Bit 2: Assert acknowledge flag */ +#define I2C_CONSET_SI (1 << 3) /* Bit 3: I2C interrrupt flag */ +#define I2C_CONSET_STO (1 << 4) /* Bit 4: STOP flag */ +#define I2C_CONSET_STA (1 << 5) /* Bit 5: START flag */ +#define I2C_CONSET_I2EN (1 << 6) /* Bit 6: I2C interface enable */ + +/* Control Clear Register (CONCLR) */ + +#define I2C_CONCLR_AAC (1 << 2) /* Bit 2: Assert acknowledge Clear bit */ +#define I2C_CONCLR_SIC (1 << 3) /* Bit 3: I2C interrupt Clear bit */ +#define I2C_CONCLR_STAC (1 << 5) /* Bit 5: START flag Clear bit */ +#define I2C_CONCLR_I2ENC (1 << 6) /* Bit 6: I2C interface Disable bit */ + +/* Status Register (STAT) */ + +#define I2C_STAT_SHIFT (1 << 3) /* Bits 3-7: Status bits */ +#define I2C_STAT_MASK (0xff << I2C_STAT_SHIFT) + +/* Master transmit mode */ + +# define I2C_STAT_MXSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */ +# define I2C_STAT_MXRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */ +# define I2C_STAT_MXSLAWACK (3 << I2C_STAT_SHIFT) /* SLA+W tranmitted + ACK received */ +# define I2C_STAT_MXSLAWNAK (4 << I2C_STAT_SHIFT) /* SLA+W tranmitted + NAK received */ +# define I2C_STAT_MXDATAACK (5 << I2C_STAT_SHIFT) /* Data tranmitted + ACK received */ +# define I2C_STAT_MXDATANAK (6 << I2C_STAT_SHIFT) /* Data tranmitted + NAK received */ +# define I2C_STAT_MXARBLOST (7 << I2C_STAT_SHIFT) /* Abritration lost in SLA+W or data */ + +/* Master receive mode */ + +# define I2C_STAT_MRSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */ +# define I2C_STAT_MRRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */ +# define I2C_STAT_MRARBLOST (7 << I2C_STAT_SHIFT) /* Abritration lost in NAK bit */ +# define I2C_STAT_MRSLARACK (8 << I2C_STAT_SHIFT) /* SLA+R tranmitted + ACK received */ +# define I2C_STAT_MRSLARNAK (9 << I2C_STAT_SHIFT) /* SLA+R tranmitted + NAK received */ +# define I2C_STAT_MRDATAACK (10 << I2C_STAT_SHIFT) /* Data received + send ACK */ +# define I2C_STAT_MRDATANAK (11 << I2C_STAT_SHIFT) /* Data received + send NAK */ + +/* Slave receive mode -- to be provided */ + +/* Slave receive mode -- to be provided */ + +/* Data Register (DAT) -- 8-bits of data */ + +/* Slave Address Register (ADR) */ + +#define I2C_ADR_GCA (1 << 0) /* Bit 0: General call enable */ +#define I2C_ADR_SHIFT 1 /* Bits 7-1: address */ +#define I2C_ADR_MASK (0x7f << I2C_ADR_SHIFT) + +/* SCL Duty Cycle Register (high half word - SCLH) - 16-bits of data */ + +/* SCL Duty Cycle Register (low half word - SCLL) - 16-bits of data */ + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/************************************************************************************ + * Inline Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Function Prototypes + ************************************************************************************/ + +#endif /* _ARCH_ARM_SRC_LPC214X_I2C_H */ |