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277 lines
7.0 KiB
C
277 lines
7.0 KiB
C
/**
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* \file
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*
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* \brief I/O USART related functionality implementation.
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*
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* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Subject to your compliance with these terms, you may use Microchip
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* software and any derivatives exclusively with Microchip products.
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* It is your responsibility to comply with third party license terms applicable
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* to your use of third party software (including open source software) that
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* may accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
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* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
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* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
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* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
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* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
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* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
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* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
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* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
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* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*
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* \asf_license_stop
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*
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*/
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#include "hal_usart_sync.h"
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#include <utils_assert.h>
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#include <utils.h>
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/**
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* \brief Driver version
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*/
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#define DRIVER_VERSION 0x00000001u
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static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
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static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
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/**
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* \brief Initialize usart interface
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*/
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int32_t usart_sync_init(struct usart_sync_descriptor *const descr, void *const hw, void *const func)
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{
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int32_t init_status;
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ASSERT(descr && hw);
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init_status = _usart_sync_init(&descr->device, hw);
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if (init_status) {
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return init_status;
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}
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descr->io.read = usart_sync_read;
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descr->io.write = usart_sync_write;
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return ERR_NONE;
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}
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/**
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* \brief Uninitialize usart interface
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*/
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int32_t usart_sync_deinit(struct usart_sync_descriptor *const descr)
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{
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ASSERT(descr);
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_usart_sync_deinit(&descr->device);
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descr->io.read = NULL;
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descr->io.write = NULL;
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return ERR_NONE;
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}
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/**
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* \brief Enable usart interface
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*/
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int32_t usart_sync_enable(struct usart_sync_descriptor *const descr)
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{
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ASSERT(descr);
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_usart_sync_enable(&descr->device);
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return ERR_NONE;
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}
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/**
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* \brief Disable usart interface
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*/
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int32_t usart_sync_disable(struct usart_sync_descriptor *const descr)
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{
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ASSERT(descr);
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_usart_sync_disable(&descr->device);
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return ERR_NONE;
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}
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/**
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* \brief Retrieve I/O descriptor
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*/
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int32_t usart_sync_get_io_descriptor(struct usart_sync_descriptor *const descr, struct io_descriptor **io)
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{
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ASSERT(descr && io);
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*io = &descr->io;
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return ERR_NONE;
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}
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/**
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* \brief Specify action for flow control pins
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*/
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int32_t usart_sync_set_flow_control(struct usart_sync_descriptor *const descr,
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const union usart_flow_control_state state)
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{
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ASSERT(descr);
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_usart_sync_set_flow_control_state(&descr->device, state);
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return ERR_NONE;
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}
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/**
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* \brief Set usart baud rate
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*/
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int32_t usart_sync_set_baud_rate(struct usart_sync_descriptor *const descr, const uint32_t baud_rate)
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{
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ASSERT(descr);
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_usart_sync_set_baud_rate(&descr->device, baud_rate);
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return ERR_NONE;
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}
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/**
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* \brief Set usart data order
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*/
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int32_t usart_sync_set_data_order(struct usart_sync_descriptor *const descr, const enum usart_data_order data_order)
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{
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ASSERT(descr);
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_usart_sync_set_data_order(&descr->device, data_order);
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return ERR_NONE;
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}
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/**
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* \brief Set usart mode
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*/
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int32_t usart_sync_set_mode(struct usart_sync_descriptor *const descr, const enum usart_mode mode)
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{
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ASSERT(descr);
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_usart_sync_set_mode(&descr->device, mode);
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return ERR_NONE;
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}
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/**
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* \brief Set usart parity
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*/
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int32_t usart_sync_set_parity(struct usart_sync_descriptor *const descr, const enum usart_parity parity)
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{
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ASSERT(descr);
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_usart_sync_set_parity(&descr->device, parity);
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return ERR_NONE;
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}
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/**
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* \brief Set usart stop bits
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*/
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int32_t usart_sync_set_stopbits(struct usart_sync_descriptor *const descr, const enum usart_stop_bits stop_bits)
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{
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ASSERT(descr);
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_usart_sync_set_stop_bits(&descr->device, stop_bits);
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return ERR_NONE;
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}
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/**
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* \brief Set usart character size
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*/
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int32_t usart_sync_set_character_size(struct usart_sync_descriptor *const descr, const enum usart_character_size size)
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{
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ASSERT(descr);
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_usart_sync_set_character_size(&descr->device, size);
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return ERR_NONE;
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}
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/**
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* \brief Retrieve the state of flow control pins
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*/
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int32_t usart_sync_flow_control_status(const struct usart_sync_descriptor *const descr,
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union usart_flow_control_state *const state)
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{
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ASSERT(descr && state);
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*state = _usart_sync_get_flow_control_state(&descr->device);
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return ERR_NONE;
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}
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/**
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* \brief Check if the usart transmitter is empty
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*/
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int32_t usart_sync_is_tx_empty(const struct usart_sync_descriptor *const descr)
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{
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ASSERT(descr);
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return _usart_sync_is_ready_to_send(&descr->device);
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}
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/**
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* \brief Check if the usart receiver is not empty
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*/
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int32_t usart_sync_is_rx_not_empty(const struct usart_sync_descriptor *const descr)
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{
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ASSERT(descr);
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return _usart_sync_is_byte_received(&descr->device);
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}
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/**
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* \brief Retrieve the current driver version
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*/
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uint32_t usart_sync_get_version(void)
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{
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return DRIVER_VERSION;
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}
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/*
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* \internal Write the given data to usart interface
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*
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* \param[in] descr The pointer to an io descriptor
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* \param[in] buf Data to write to usart
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* \param[in] length The number of bytes to write
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*
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* \return The number of bytes written.
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*/
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static int32_t usart_sync_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length)
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{
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uint32_t offset = 0;
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struct usart_sync_descriptor *descr = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
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ASSERT(io_descr && buf && length);
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while (!_usart_sync_is_ready_to_send(&descr->device))
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;
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do {
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_usart_sync_write_byte(&descr->device, buf[offset]);
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while (!_usart_sync_is_ready_to_send(&descr->device))
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;
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} while (++offset < length);
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while (!_usart_sync_is_transmit_done(&descr->device))
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;
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return (int32_t)offset;
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}
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/*
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* \internal Read data from usart interface
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*
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* \param[in] descr The pointer to an io descriptor
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* \param[in] buf A buffer to read data to
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* \param[in] length The size of a buffer
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*
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* \return The number of bytes read.
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*/
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static int32_t usart_sync_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length)
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{
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uint32_t offset = 0;
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struct usart_sync_descriptor *descr = CONTAINER_OF(io_descr, struct usart_sync_descriptor, io);
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ASSERT(io_descr && buf && length);
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do {
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while (!_usart_sync_is_byte_received(&descr->device))
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;
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buf[offset] = _usart_sync_read_byte(&descr->device);
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} while (++offset < length);
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return (int32_t)offset;
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}
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