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ChibiOS/os/hal/platforms/STM8L/serial_lld.h

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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file STM8L/serial_lld.h
* @brief STM8L low level serial driver header.
*
* @addtogroup SERIAL
* @{
*/
#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define SD_MODE_PARITY 0x07 /**< @brief Parity field mask. */
#define SD_MODE_PARITY_NONE 0x00 /**< @brief No parity. */
#define SD_MODE_PARITY_EVEN 0x05 /**< @brief Even parity. */
#define SD_MODE_PARITY_ODD 0x07 /**< @brief Odd parity. */
#define SD_MODE_STOP 0x30 /**< @brief Stop bits mask. */
#define SD_MODE_STOP_1 0x00 /**< @brief One stop bit. */
#define SD_MODE_STOP_2 0x20 /**< @brief Two stop bits. */
#define SD_MODE_STOP_1P5 0x30 /**< @brief 1.5 stop bits. */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief USART1 driver enable switch.
* @details If set to @p TRUE the support for USART1 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART1) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART1 TRUE
#endif
/**
* @brief USART2 driver enable switch.
* @details If set to @p TRUE the support for USART3 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART2) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART2 TRUE
#endif
/**
* @brief USART3 driver enable switch.
* @details If set to @p TRUE the support for USART3 is included.
* @note The default is @p TRUE.
*/
#if !defined(STM8L_SERIAL_USE_USART3) || defined(__DOXYGEN__)
#define STM8L_SERIAL_USE_USART3 TRUE
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if STM8L_SERIAL_USE_USART1 && !STM8L_HAS_USART1
#error "USART1 not present in the selected device"
#endif
#if STM8L_SERIAL_USE_USART2 && !STM8L_HAS_USART2
#error "USART2 not present in the selected device"
#endif
#if STM8L_SERIAL_USE_USART3 && !STM8L_HAS_USART3
#error "USART3 not present in the selected device"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Generic Serial Driver configuration structure.
* @details An instance of this structure must be passed to @p sdStart()
* in order to configure and start a serial driver operations.
* @note This structure content is architecture dependent, each driver
* implementation defines its own version and the custom static
* initializers.
*/
typedef struct {
/**
* @brief Bit rate register.
*/
uint16_t sc_brr;
/**
* @brief Mode flags.
*/
uint8_t sc_mode;
} SerialConfig;
/**
* @brief @p SerialDriver specific data.
*/
#define _serial_driver_data \
_base_asynchronous_channel_data \
/* Driver state.*/ \
sdstate_t state; \
/* Input queue.*/ \
InputQueue iqueue; \
/* Output queue.*/ \
OutputQueue oqueue; \
/* Input circular buffer.*/ \
uint8_t ib[SERIAL_BUFFERS_SIZE]; \
/* Output circular buffer.*/ \
uint8_t ob[SERIAL_BUFFERS_SIZE]; \
/* End of the mandatory fields.*/ \
USART_TypeDef *usart;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Macro for baud rate computation.
* @note Make sure the final baud rate is within tolerance.
*/
#define BRR(b) (SYSCLK / (b))
#if STM8L_SERIAL_USE_USART1 || defined(__DOXYGEN__)
/**
* @brief USART1 RX interrupt handler segment.
*/
#define _USART1_RECEIVE_ISR() { \
uint8_t sr = USART1->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD1, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD1, USART1->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART1 TX interrupt handler segment.
*/
#define _USART1_TRANSMIT_ISR() { \
if (USART1->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD1); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART1->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART1->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART1 */
#if STM8L_SERIAL_USE_USART2 || defined(__DOXYGEN__)
/**
* @brief USART2 RX interrupt handler segment.
*/
#define _USART2_RECEIVE_ISR() { \
uint8_t sr = USART2->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD2, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD2, USART2->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART2 TX interrupt handler segment.
*/
#define _USART2_TRANSMIT_ISR() { \
if (USART2->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD2); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART2->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART2->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART2 */
#if STM8L_SERIAL_USE_USART3 || defined(__DOXYGEN__)
/**
* @brief USART3 RX interrupt handler segment.
*/
#define _USART3_RECEIVE_ISR() { \
uint8_t sr = USART3->SR; \
if (sr & (USART_SR_RXNE | USART_SR_OR | USART_SR_NF | \
USART_SR_FE | USART_SR_PE)) { \
if (sr & (USART_SR_OR | USART_SR_NF | USART_SR_FE | USART_SR_PE)) \
sd_lld_set_error(&SD3, sr); \
chSysLockFromIsr(); \
sdIncomingDataI(&SD3, USART3->DR); \
chSysUnlockFromIsr(); \
} \
}
/**
* @brief USART3 TX interrupt handler segment.
*/
#define _USART3_TRANSMIT_ISR() { \
if (USART3->SR & USART_SR_TXE) { \
msg_t b; \
chSysLockFromIsr(); \
b = sdRequestDataI(&SD3); \
chSysUnlockFromIsr(); \
if (b < Q_OK) \
USART3->CR2 &= (uint8_t)~USART_CR2_TIEN; \
else \
USART3->DR = (uint8_t)b; \
} \
}
#endif /* STM8L_SERIAL_USE_USART3 */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if STM8L_SERIAL_USE_USART1 && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if STM8L_SERIAL_USE_USART2 && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif
#if STM8L_SERIAL_USE_USART3 && !defined(__DOXYGEN__)
extern SerialDriver SD3;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void sd_lld_init(void);
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
void sd_lld_stop(SerialDriver *sdp);
void sd_lld_set_error(SerialDriver *sdp, uint8_t sr);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SERIAL */
#endif /* _SERIAL_LLD_H_ */
/** @} */
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