154 lines
5.9 KiB
C
154 lines
5.9 KiB
C
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/**************************************************************************************************
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Filename: hal_i2c.h
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Revised: $Date: 2012-10-19 16:06:31 -0700 (Fri, 19 Oct 2012) $
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Revision: $Revision: 31875 $
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Description:
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This module defines the HAL I2C API for the CC2533. Simplicity, speed and code size were the
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priorities over multi-master and/or multi-slave support which can easily be added as an
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enhancement to the detriment of the aforementioned.
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Copyright 2011-2012 Texas Instruments Incorporated. All rights reserved.
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IMPORTANT: Your use of this Software is limited to those specific rights
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granted under the terms of a software license agreement between the user
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who downloaded the software, his/her employer (which must be your employer)
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and Texas Instruments Incorporated (the "License"). You may not use this
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Software unless you agree to abide by the terms of the License. The License
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limits your use, and you acknowledge, that the Software may not be modified,
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copied or distributed unless embedded on a Texas Instruments microcontroller
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or used solely and exclusively in conjunction with a Texas Instruments radio
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frequency transceiver, which is integrated into your product. Other than for
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the foregoing purpose, you may not use, reproduce, copy, prepare derivative
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works of, modify, distribute, perform, display or sell this Software and/or
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its documentation for any purpose.
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YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
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PROVIDED <EFBFBD>AS IS<EFBFBD> WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
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NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
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TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
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NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
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LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
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INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
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OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
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OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
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(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
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Should you have any questions regarding your right to use this Software,
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contact Texas Instruments Incorporated at www.TI.com.
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**************************************************************************************************/
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#ifndef HAL_I2C_H
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#define HAL_I2C_H
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/* ------------------------------------------------------------------------------------------------
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* Includes
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* ------------------------------------------------------------------------------------------------
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*/
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#include "hal_types.h"
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#if (defined HAL_I2C) && (HAL_I2C == TRUE)
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/* ------------------------------------------------------------------------------------------------
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* Constants
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* ------------------------------------------------------------------------------------------------
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*/
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#if !defined HAL_I2C_MASTER
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#define HAL_I2C_MASTER FALSE
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#endif
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#if !defined HAL_I2C_SLAVE
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#if HAL_I2C_MASTER
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#define HAL_I2C_SLAVE FALSE
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#else
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#define HAL_I2C_SLAVE TRUE
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#endif
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#endif
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#if HAL_I2C_MASTER
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#define HAL_I2C_POLLED FALSE // Master does not use ISR and does not need periodic polling.
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#else // if HAL_I2C_SLAVE
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#if !defined HAL_I2C_POLLED
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#define HAL_I2C_POLLED FALSE // Prefer the ISR as a Slave to speed reaction to Master READ req.
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#endif
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#endif
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#if !defined HAL_I2C_BUF_MAX
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#define HAL_I2C_BUF_MAX 255
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#endif
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#define HAL_I2C_SLAVE_ADDR_DEF 0x41
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/* ------------------------------------------------------------------------------------------------
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* Typedefs
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* ------------------------------------------------------------------------------------------------
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*/
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#if (HAL_I2C_BUF_MAX < 256)
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typedef uint8 i2cLen_t;
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#else
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typedef uint16 i2cLen_t;
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#endif
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#if HAL_I2C_MASTER
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typedef enum {
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i2cClock_123KHZ = 0x00,
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i2cClock_144KHZ = 0x01,
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i2cClock_165KHZ = 0x02,
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i2cClock_197KHZ = 0x03,
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i2cClock_33KHZ = 0x80,
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i2cClock_267KHZ = 0x81,
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i2cClock_533KHZ = 0x82
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} i2cClock_t;
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#else // if HAL_I2C_SLAVE
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/**************************************************************************************************
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* @fn i2cCallback_t
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*
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* @brief Slave mode callback to Application to alert of a Master request to read or of
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* received bytes from a Master write.
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*
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* input parameters
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*
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* @param cnt - Zero indicates Master read request and slave Tx buffer empty. Non-zero
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* indicates the number of bytes received from a Master write,
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* this data is in the slave Rx buffer, ready to be read.
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*
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* output parameters
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*
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* None.
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*
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* @return N/A when cnt is non-zero; otherwise TRUE if I2C should continue to clock stretch,
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* FALSE to send a zero with last byte indication.
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*/
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typedef uint8 (*i2cCallback_t)(uint8 cnt);
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#endif
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/* ------------------------------------------------------------------------------------------------
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* Global Functions
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* ------------------------------------------------------------------------------------------------
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*/
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#if HAL_I2C_MASTER
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void HalI2CInit(i2cClock_t clockRate);
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i2cLen_t HalI2CRead(uint8 address, i2cLen_t len, uint8 *pBuf);
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i2cLen_t HalI2CWrite(uint8 address, i2cLen_t len, uint8 *pBuf);
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#else
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void HalI2CInit(uint8 address, i2cCallback_t i2cCallback);
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i2cLen_t HalI2CRead(i2cLen_t len, uint8 *pBuf);
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i2cLen_t HalI2CWrite(i2cLen_t len, uint8 *pBuf);
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#if HAL_I2C_POLLED
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void HalI2CPoll(void);
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#endif
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#endif
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uint8 HalI2CReady2Sleep(void);
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void HalI2CEnterSleep(void);
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void HalI2CExitSleep(void);
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#endif
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#endif
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/**************************************************************************************************
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*/
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