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/**
* \file
*
* \brief I/O USART 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_usart_sync.h"
#include <utils_assert.h>
#include <utils.h>
/**
* \brief Driver version
*/
#define DRIVER_VERSION 0x00000001u
static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
/**
* \brief Initialize usart interface
*/
int32_t usart_sync_init(struct usart_sync_descriptor *const descr, void *const hw, void *const func)
{
int32_t init_status;
ASSERT(descr && hw);
init_status = _usart_sync_init(&descr->device, hw);
if (init_status) {
return init_status;
}
descr->io.read = usart_sync_read;
descr->io.write = usart_sync_write;
return ERR_NONE;
}
/**
* \brief Uninitialize usart interface
*/
int32_t usart_sync_deinit(struct usart_sync_descriptor *const descr)
{
ASSERT(descr);
_usart_sync_deinit(&descr->device);
descr->io.read = NULL;
descr->io.write = NULL;
return ERR_NONE;
}
/**
* \brief Enable usart interface
*/
int32_t usart_sync_enable(struct usart_sync_descriptor *const descr)
{
ASSERT(descr);
_usart_sync_enable(&descr->device);
return ERR_NONE;
}
/**
* \brief Disable usart interface
*/
int32_t usart_sync_disable(struct usart_sync_descriptor *const descr)
{
ASSERT(descr);
_usart_sync_disable(&descr->device);
return ERR_NONE;
}
/**
* \brief Retrieve I/O descriptor
*/
int32_t usart_sync_get_io_descriptor(struct usart_sync_descriptor *const descr, struct io_descriptor **io)
{
ASSERT(descr && io);
*io = &descr->io;
return ERR_NONE;
}
/**
* \brief Specify action for flow control pins
*/
int32_t usart_sync_set_flow_control(struct usart_sync_descriptor *const descr,
const union usart_flow_control_state state)
{
ASSERT(descr);
_usart_sync_set_flow_control_state(&descr->device, state);
return ERR_NONE;
}
/**
* \brief Set usart baud rate
*/
int32_t usart_sync_set_baud_rate(struct usart_sync_descriptor *const descr, const uint32_t baud_rate)
{
ASSERT(descr);
_usart_sync_set_baud_rate(&descr->device, baud_rate);
return ERR_NONE;
}
/**
* \brief Set usart data order
*/
int32_t usart_sync_set_data_order(struct usart_sync_descriptor *const descr, const enum usart_data_order data_order)
{
ASSERT(descr);
_usart_sync_set_data_order(&descr->device, data_order);
return ERR_NONE;
}
/**
* \brief Set usart mode
*/
int32_t usart_sync_set_mode(struct usart_sync_descriptor *const descr, const enum usart_mode mode)
{
ASSERT(descr);
_usart_sync_set_mode(&descr->device, mode);
return ERR_NONE;
}
/**
* \brief Set usart parity
*/
int32_t usart_sync_set_parity(struct usart_sync_descriptor *const descr, const enum usart_parity parity)
{
ASSERT(descr);
_usart_sync_set_parity(&descr->device, parity);
return ERR_NONE;
}
/**
* \brief Set usart stop bits
*/
int32_t usart_sync_set_stopbits(struct usart_sync_descriptor *const descr, const enum usart_stop_bits stop_bits)
{
ASSERT(descr);
_usart_sync_set_stop_bits(&descr->device, stop_bits);
return ERR_NONE;
}
/**
* \brief Set usart character size
*/
int32_t usart_sync_set_character_size(struct usart_sync_descriptor *const descr, const enum usart_character_size size)
{
ASSERT(descr);
_usart_sync_set_character_size(&descr->device, size);
return ERR_NONE;
}
/**
* \brief Retrieve the state of flow control pins
*/
int32_t usart_sync_flow_control_status(const struct usart_sync_descriptor *const descr,
union usart_flow_control_state *const state)
{
ASSERT(descr && state);
*state = _usart_sync_get_flow_control_state(&descr->device);
return ERR_NONE;
}
/**
* \brief Check if the usart transmitter is empty
*/
int32_t usart_sync_is_tx_empty(const struct usart_sync_descriptor *const descr)
{
ASSERT(descr);
return _usart_sync_is_ready_to_send(&descr->device);
}
/**
* \brief Check if the usart receiver is not empty
*/
int32_t usart_sync_is_rx_not_empty(const struct usart_sync_descriptor *const descr)
{
ASSERT(descr);
return _usart_sync_is_byte_received(&descr->device);
}
/**
* \brief Retrieve the current driver version
*/
uint32_t usart_sync_get_version(void)
{
return DRIVER_VERSION;
}
/*
* \internal Write the given data to usart interface
*
* \param[in] descr The pointer to an io descriptor
* \param[in] buf Data to write to usart
* \param[in] length The number of bytes to write
*
* \return The number of bytes written.
*/
static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length)
{
uint32_t offset = 0;
struct usart_sync_descriptor *descr = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
ASSERT(io_descr && buf && length);
while (!_usart_sync_is_ready_to_send(&descr->device))
;
do {
_usart_sync_write_byte(&descr->device, buf[offset]);
while (!_usart_sync_is_ready_to_send(&descr->device))
;
} while (++offset < length);
while (!_usart_sync_is_transmit_done(&descr->device))
;
return (int32_t)offset;
}
/*
* \internal Read data from usart interface
*
* \param[in] descr The pointer to an io descriptor
* \param[in] buf A buffer to read data to
* \param[in] length The size of a buffer
*
* \return The number of bytes read.
*/
static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length)
{
uint32_t offset = 0;
struct usart_sync_descriptor *descr = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
ASSERT(io_descr && buf && length);
do {
while (!_usart_sync_is_byte_received(&descr->device))
;
buf[offset] = _usart_sync_read_byte(&descr->device);
} while (++offset < length);
return (int32_t)offset;
}
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