343 lines
13 KiB
C
343 lines
13 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file uart.h
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* @brief UART Driver macros and structures.
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*
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* @addtogroup UART
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* @{
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*/
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#ifndef _UART_H_
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#define _UART_H_
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#if (HAL_USE_UART == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @name UART status flags
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* @{
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*/
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#define UART_NO_ERROR 0 /**< @brief No pending conditions. */
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#define UART_PARITY_ERROR 4 /**< @brief Parity error happened. */
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#define UART_FRAMING_ERROR 8 /**< @brief Framing error happened. */
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#define UART_OVERRUN_ERROR 16 /**< @brief Overflow happened. */
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#define UART_NOISE_ERROR 32 /**< @brief Noise on the line. */
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#define UART_BREAK_DETECTED 64 /**< @brief Break detected. */
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/** @} */
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name UART configuration options
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* @{
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*/
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/**
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* @brief Enables synchronous APIs.
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* @note Disabling this option saves both code and data space.
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*/
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#if !defined(UART_USE_WAIT) || defined(__DOXYGEN__)
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#define UART_USE_WAIT FALSE
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#endif
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/**
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* @brief Enables the @p uartAcquireBus() and @p uartReleaseBus() APIs.
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* @note Disabling this option saves both code and data space.
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*/
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#if !defined(UART_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
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#define UART_USE_MUTUAL_EXCLUSION FALSE
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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UART_UNINIT = 0, /**< Not initialized. */
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UART_STOP = 1, /**< Stopped. */
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UART_READY = 2 /**< Ready. */
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} uartstate_t;
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/**
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* @brief Transmitter state machine states.
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*/
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typedef enum {
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UART_TX_IDLE = 0, /**< Not transmitting. */
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UART_TX_ACTIVE = 1, /**< Transmitting. */
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UART_TX_COMPLETE = 2 /**< Buffer complete. */
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} uarttxstate_t;
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/**
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* @brief Receiver state machine states.
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*/
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typedef enum {
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UART_RX_IDLE = 0, /**< Not receiving. */
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UART_RX_ACTIVE = 1, /**< Receiving. */
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UART_RX_COMPLETE = 2 /**< Buffer complete. */
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} uartrxstate_t;
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#include "uart_lld.h"
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Low level driver helper macros
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* @{
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*/
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#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Wakes up the waiting thread in case of early TX complete.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_wakeup_tx1_isr(uartp) { \
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if ((uartp)->early == true) { \
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osalSysLockFromISR(); \
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osalThreadResumeI(&(uartp)->threadtx, MSG_OK); \
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osalSysUnlockFromISR(); \
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} \
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}
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#else /* !UART_USE_WAIT */
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#define _uart_wakeup_tx1_isr(uartp)
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#endif /* !UART_USE_WAIT */
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#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Wakes up the waiting thread in case of late TX complete.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_wakeup_tx2_isr(uartp) { \
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if ((uartp)->early == false) { \
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osalSysLockFromISR(); \
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osalThreadResumeI(&(uartp)->threadtx, MSG_OK); \
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osalSysUnlockFromISR(); \
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} \
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}
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#else /* !UART_USE_WAIT */
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#define _uart_wakeup_tx2_isr(uartp)
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#endif /* !UART_USE_WAIT */
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#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Wakes up the waiting thread in case of RX complete.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_wakeup_rx_complete_isr(uartp) { \
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osalSysLockFromISR(); \
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osalThreadResumeI(&(uartp)->threadrx, MSG_OK); \
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osalSysUnlockFromISR(); \
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}
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#else /* !UART_USE_WAIT */
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#define _uart_wakeup_rx_complete_isr(uartp)
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#endif /* !UART_USE_WAIT */
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#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Wakes up the waiting thread in case of RX error.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_wakeup_rx_error_isr(uartp) { \
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osalSysLockFromISR(); \
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osalThreadResumeI(&(uartp)->threadrx, MSG_RESET); \
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osalSysUnlockFromISR(); \
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}
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#else /* !UART_USE_WAIT */
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#define _uart_wakeup_rx_error_isr(uartp)
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#endif /* !UART_USE_WAIT */
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/**
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* @brief Common ISR code for early TX.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_tx1_isr_code(uartp) { \
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(uartp)->txstate = UART_TX_COMPLETE; \
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if ((uartp)->config->txend1_cb != NULL) { \
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(uartp)->config->txend1_cb(uartp); \
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} \
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if ((uartp)->txstate == UART_TX_COMPLETE) { \
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(uartp)->txstate = UART_TX_IDLE; \
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} \
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_uart_wakeup_tx1_isr(uartp); \
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}
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/**
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* @brief Common ISR code for late TX.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_tx2_isr_code(uartp) { \
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if ((uartp)->config->txend2_cb != NULL) { \
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(uartp)->config->txend2_cb(uartp); \
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} \
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_uart_wakeup_tx2_isr(uartp); \
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}
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/**
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* @brief Common ISR code for RX complete.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_rx_complete_isr_code(uartp) { \
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(uartp)->rxstate = UART_RX_COMPLETE; \
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if ((uartp)->config->rxend_cb != NULL) { \
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(uartp)->config->rxend_cb(uartp); \
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} \
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if ((uartp)->rxstate == UART_RX_COMPLETE) { \
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(uartp)->rxstate = UART_RX_IDLE; \
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uart_enter_rx_idle_loop(uartp); \
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} \
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_uart_wakeup_rx_complete_isr(uartp); \
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}
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/**
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* @brief Common ISR code for RX error.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] errors mask of errors to be reported
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*
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* @notapi
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*/
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#define _uart_rx_error_isr_code(uartp, errors) { \
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if ((uartp)->config->rxerr_cb != NULL) { \
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(uartp)->config->rxerr_cb(uartp, errors); \
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} \
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_uart_wakeup_rx_error_isr(uartp); \
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}
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/**
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* @brief Common ISR code for RX on idle.
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* @details This code handles the portable part of the ISR code:
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* - Callback invocation.
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* - Waiting thread wakeup, if any.
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* - Driver state transitions.
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* .
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* @note This macro is meant to be used in the low level drivers
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* implementation only.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @notapi
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*/
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#define _uart_rx_idle_code(uartp) { \
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if ((uartp)->config->rxchar_cb != NULL) \
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(uartp)->config->rxchar_cb(uartp, (uartp)->rxbuf); \
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}
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void uartInit(void);
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void uartObjectInit(UARTDriver *uartp);
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void uartStart(UARTDriver *uartp, const UARTConfig *config);
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void uartStop(UARTDriver *uartp);
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void uartStartSend(UARTDriver *uartp, size_t n, const void *txbuf);
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void uartStartSendI(UARTDriver *uartp, size_t n, const void *txbuf);
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size_t uartStopSend(UARTDriver *uartp);
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size_t uartStopSendI(UARTDriver *uartp);
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void uartStartReceive(UARTDriver *uartp, size_t n, void *rxbuf);
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void uartStartReceiveI(UARTDriver *uartp, size_t n, void *rxbuf);
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size_t uartStopReceive(UARTDriver *uartp);
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size_t uartStopReceiveI(UARTDriver *uartp);
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#if UART_USE_WAIT == TRUE
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msg_t uartSendTimeout(UARTDriver *uartp, size_t *np,
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const void *txbuf, systime_t timeout);
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msg_t uartSendFullTimeout(UARTDriver *uartp, size_t *np,
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const void *txbuf, systime_t timeout);
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msg_t uartReceiveTimeout(UARTDriver *uartp, size_t *np,
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void *rxbuf, systime_t timeout);
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#endif
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#if UART_USE_MUTUAL_EXCLUSION == TRUE
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void uartAcquireBus(UARTDriver *uartp);
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void uartReleaseBus(UARTDriver *uartp);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_UART == TRUE */
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#endif /* _UART_H_ */
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/** @} */
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