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Diffstat (limited to 'watch-library/hal/src/hal_i2c_m_sync.c')
| -rw-r--r-- | watch-library/hal/src/hal_i2c_m_sync.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/watch-library/hal/src/hal_i2c_m_sync.c b/watch-library/hal/src/hal_i2c_m_sync.c new file mode 100644 index 00000000..30821a27 --- /dev/null +++ b/watch-library/hal/src/hal_i2c_m_sync.c @@ -0,0 +1,258 @@ +/** + * \file + * + * \brief I/O I2C related functionality implementation. + * + * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \asf_license_stop + * + */ +#include <hal_i2c_m_sync.h> +#include <utils.h> +#include <utils_assert.h> + +/** + * \brief Driver version + */ +#define DRIVER_VERSION 0x00000001u + +/** + * \brief Sync version of I2C I/O read + */ +static int32_t i2c_m_sync_read(struct io_descriptor *io, uint8_t *buf, const uint16_t n) +{ + struct i2c_m_sync_desc *i2c = CONTAINER_OF(io, struct i2c_m_sync_desc, io); + struct _i2c_m_msg msg; + int32_t ret; + + msg.addr = i2c->slave_addr; + msg.len = n; + msg.flags = I2C_M_STOP | I2C_M_RD; + msg.buffer = buf; + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret) { + return ret; + } + + return n; +} + +/** + * \brief Sync version of I2C I/O write + */ +static int32_t i2c_m_sync_write(struct io_descriptor *io, const uint8_t *buf, const uint16_t n) +{ + struct i2c_m_sync_desc *i2c = CONTAINER_OF(io, struct i2c_m_sync_desc, io); + struct _i2c_m_msg msg; + int32_t ret; + + msg.addr = i2c->slave_addr; + msg.len = n; + msg.flags = I2C_M_STOP; + msg.buffer = (uint8_t *)buf; + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret) { + return ret; + } + + return n; +} + +/** + * \brief Sync version of i2c initialize + */ +int32_t i2c_m_sync_init(struct i2c_m_sync_desc *i2c, void *hw) +{ + int32_t init_status; + ASSERT(i2c); + + init_status = _i2c_m_sync_init(&i2c->device, hw); + if (init_status) { + return init_status; + } + + /* Init I/O */ + i2c->io.read = i2c_m_sync_read; + i2c->io.write = i2c_m_sync_write; + + return ERR_NONE; +} + +/** + * \brief deinitialize + */ +int32_t i2c_m_sync_deinit(struct i2c_m_sync_desc *i2c) +{ + int32_t status; + ASSERT(i2c); + + status = _i2c_m_sync_deinit(&i2c->device); + if (status) { + return status; + } + + i2c->io.read = NULL; + i2c->io.write = NULL; + + return ERR_NONE; +} + +/** + * \brief Sync version of i2c enable + */ +int32_t i2c_m_sync_enable(struct i2c_m_sync_desc *i2c) +{ + return _i2c_m_sync_enable(&i2c->device); +} + +/** + * \brief Sync version of i2c disable + */ +int32_t i2c_m_sync_disable(struct i2c_m_sync_desc *i2c) +{ + return _i2c_m_sync_disable(&i2c->device); +} + +/** + * \brief Sync version of i2c set slave address + */ +int32_t i2c_m_sync_set_slaveaddr(struct i2c_m_sync_desc *i2c, int16_t addr, int32_t addr_len) +{ + return i2c->slave_addr = (addr & 0x3ff) | (addr_len & I2C_M_TEN); +} + +/** + * \brief Sync version of i2c set baudrate + */ +int32_t i2c_m_sync_set_baudrate(struct i2c_m_sync_desc *i2c, uint32_t clkrate, uint32_t baudrate) +{ + return _i2c_m_sync_set_baudrate(&i2c->device, clkrate, baudrate); +} + +/** + * \brief Sync version of i2c write command + */ +int32_t i2c_m_sync_cmd_write(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length) +{ + struct _i2c_m_msg msg; + int32_t ret; + + msg.addr = i2c->slave_addr; + msg.len = 1; + msg.flags = 0; + msg.buffer = ® + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret != 0) { + /* error occurred */ + return ret; + } + + msg.flags = I2C_M_STOP; + msg.buffer = buffer; + msg.len = length; + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret != 0) { + /* error occurred */ + return ret; + } + + return ERR_NONE; +} + +/** + * \brief Sync version of i2c read command + */ +int32_t i2c_m_sync_cmd_read(struct i2c_m_sync_desc *i2c, uint8_t reg, uint8_t *buffer, uint8_t length) +{ + struct _i2c_m_msg msg; + int32_t ret; + + msg.addr = i2c->slave_addr; + msg.len = 1; + msg.flags = 0; + msg.buffer = ® + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret != 0) { + /* error occurred */ + return ret; + } + + msg.flags = I2C_M_STOP | I2C_M_RD; + msg.buffer = buffer; + msg.len = length; + + ret = _i2c_m_sync_transfer(&i2c->device, &msg); + + if (ret != 0) { + /* error occurred */ + return ret; + } + + return ERR_NONE; +} + +/** + * \brief Sync version of i2c transfer command + */ +int32_t i2c_m_sync_transfer(struct i2c_m_sync_desc *const i2c, struct _i2c_m_msg *msg) +{ + return _i2c_m_sync_transfer(&i2c->device, msg); +} + +/** + * \brief Sync version of i2c send stop condition command + */ +int32_t i2c_m_sync_send_stop(struct i2c_m_sync_desc *const i2c) +{ + return _i2c_m_sync_send_stop(&i2c->device); +} + +/** + * \brief Retrieve I/O descriptor + */ +int32_t i2c_m_sync_get_io_descriptor(struct i2c_m_sync_desc *const i2c, struct io_descriptor **io) +{ + *io = &i2c->io; + return ERR_NONE; +} + +/** + * \brief Retrieve the current driver version + */ +uint32_t i2c_m_sync_get_version(void) +{ + return DRIVER_VERSION; +} |