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Diffstat (limited to 'atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h')
| -rw-r--r-- | atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h b/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h new file mode 100644 index 000000000..65741831a --- /dev/null +++ b/atmel-samd/asf4/samd21/hal/include/hal_i2c_m_sync.h @@ -0,0 +1,254 @@ +/** + * \file + * + * \brief Sync I2C Hardware Abstraction Layer(HAL) declaration. + * + * Copyright (C) 2014 Atmel Corporation. All rights reserved. + * + * \asf_license_start + * + * \page License + * + * 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. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an + * Atmel microcontroller product. + * + * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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. + * + * \asf_license_stop + * + */ + +#ifndef _HAL_I2C_M_SYNC_H_INCLUDED +#define _HAL_I2C_M_SYNC_H_INCLUDED + +#include <hpl_i2c_m_sync.h> +#include <hal_io.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \addtogroup doc_driver_hal_i2c_master_sync + * + * @{ + */ + +#define I2C_M_MAX_RETRY 1 + +/** + * \brief I2C descriptor structure, embed i2c_device & i2c_interface + */ +struct i2c_m_sync_desc { + struct _i2c_m_sync_device device; + struct io_descriptor io; + uint16_t slave_addr; +}; + +/** + * \brief Initialize synchronous I2C interface + * + * This function initializes the given I/O descriptor to be used as a + * synchronous I2C interface descriptor. + * It checks if the given hardware is not initialized and if the given hardware + * is permitted to be initialized. + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] hw The pointer to hardware instance + * + * \return Initialization status. + * \retval -1 The passed parameters were invalid or the interface is already initialized + * \retval 0 The initialization is completed successfully + */ +int32_t i2c_m_sync_init(struct i2c_m_sync_desc *i2c, void *hw); + +/** + * \brief Deinitialize I2C interface + * + * This function deinitializes the given I/O descriptor. + * It checks if the given hardware is initialized and if the given hardware is permitted to be deinitialized. + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * + * \return Uninitialization status. + * \retval -1 The passed parameters were invalid or the interface is already deinitialized + * \retval 0 The de-initialization is completed successfully + */ +int32_t i2c_m_sync_deinit(struct i2c_m_sync_desc *i2c); + +/** + * \brief Set the slave device address + * + * This function sets the next transfer target slave I2C device address. + * It takes no effect to any already started access. + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] addr The slave address to access + * \param[in] addr_len The slave address length, can be I2C_M_TEN or I2C_M_SEVEN + * + * \return Masked slave address. The mask is a maximum 10-bit address, and 10th + * bit is set if a 10-bit address is used + */ +int32_t i2c_m_sync_set_slaveaddr(struct i2c_m_sync_desc *i2c, int16_t addr, int32_t addr_len); + +/** + * \brief Set baudrate + * + * This function sets the I2C device to the specified baudrate. + * It only takes effect when the hardware is disabled. + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] clkrate Unused parameter. Should always be 0 + * \param[in] baudrate The baudrate value set to master + * + * \return Whether successfully set the baudrate + * \retval -1 The passed parameters were invalid or the device is already enabled + * \retval 0 The baudrate set is completed successfully + */ +int32_t i2c_m_sync_set_baudrate(struct i2c_m_sync_desc *i2c, uint32_t clkrate, uint32_t baudrate); + +/** + * \brief Sync version of enable hardware + * + * This function enables the I2C device, and then waits for this enabling operation to be done + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * + * \return Whether successfully enable the device + * \retval -1 The passed parameters were invalid or the device enable failed + * \retval 0 The hardware enabling is completed successfully + */ +int32_t i2c_m_sync_enable(struct i2c_m_sync_desc *i2c); + +/** + * \brief Sync version of disable hardware + * + * This function disables the I2C device and then waits for this disabling operation to be done + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * + * \return Whether successfully disable the device + * \retval -1 The passed parameters were invalid or the device disable failed + * \retval 0 The hardware disabling is completed successfully + */ +int32_t i2c_m_sync_disable(struct i2c_m_sync_desc *i2c); + +/** + * \brief Sync version of write command to I2C slave + * + * This function will write the value to a specified register in the I2C slave device and + * then wait for this operation to be done. + * + * The sequence of this routine is + * sta->address(write)->ack->reg address->ack->resta->address(write)->ack->reg value->nack->stt + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] reg The internal address/register of the I2C slave device + * \param[in] buffer The buffer holding data to write to the I2C slave device + * \param[in] length The length (in bytes) to write to the I2C slave device + * + * \return Whether successfully write to the device + * \retval <0 The passed parameters were invalid or write fail + * \retval 0 Writing to register is completed successfully + */ +int32_t i2c_m_sync_cmd_write(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length); + +/** + * \brief Sync version of read register value from I2C slave + * + * This function will read a byte value from a specified register in the I2C slave device and + * then wait for this operation to be done. + * + * The sequence of this routine is + * sta->address(write)->ack->reg address->ack->resta->address(read)->ack->reg value->nack->stt + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] reg The internal address/register of the I2C slave device + * \param[in] buffer The buffer to hold the read data from the I2C slave device + * \param[in] length The length (in bytes) to read from the I2C slave device + * + * \return Whether successfully read from the device + * \retval <0 The passed parameters were invalid or read fail + * \retval 0 Reading from register is completed successfully + */ +int32_t i2c_m_sync_cmd_read(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length); + +/** + * \brief Sync version of transfer message to/from the I2C slave + * + * This function will transfer a message between the I2C slave and the master. This function will wait for the operation + * to be done. + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * \param[in] msg An i2c_m_msg struct + * + * \return The status of the operation + * \retval 0 Operation completed successfully + * \retval <0 Operation failed + */ +int32_t i2c_m_sync_transfer(struct i2c_m_sync_desc *const i2c, struct _i2c_m_msg *msg); + +/** + * \brief Sync version of send stop condition on the i2c bus + * + * This function will create a stop condition on the i2c bus to release the bus + * + * \param[in] i2c An I2C descriptor, which is used to communicate through I2C + * + * \return The status of the operation + * \retval 0 Operation completed successfully + * \retval <0 Operation failed + */ +int32_t i2c_m_sync_send_stop(struct i2c_m_sync_desc *const i2c); + +/** + * \brief Return I/O descriptor for this I2C instance + * + * This function will return a I/O instance for this I2C driver instance + * + * \param[in] i2c_m_sync_desc An I2C descriptor, which is used to communicate through I2C + * \param[in] io_descriptor A pointer to an I/O descriptor pointer type + * + * \return Error code + * \retval 0 No error detected + * \retval <0 Error code + */ +int32_t i2c_m_sync_get_io_descriptor(struct i2c_m_sync_desc *const i2c, struct io_descriptor **io); + +/** + * \brief Retrieve the current driver version + * + * \return Current driver version. + */ +uint32_t i2c_m_sync_get_version(void); + +/**@}*/ + +#ifdef __cplusplus +} +#endif + +#endif |