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/**
* \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->periph_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->periph_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 peripheral address
*/
int32_t i2c_m_sync_set_periphaddr(struct i2c_m_sync_desc *i2c, int16_t addr, int32_t addr_len)
{
return i2c->periph_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->periph_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->periph_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;
}
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