271 lines
12 KiB
C
271 lines
12 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @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_ */
|
|
|
|
/** @} */
|