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tinySA/os/hal/platforms/LPC8xx/serial_lld.h

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/*
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 LPC8xx/serial_lld.h
* @brief LPC8xx low level serial driver header.
*
* @addtogroup SERIAL
* @{
*/
#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define CFG_ENA 0x0001
#define CFG_DL7 0x0000
#define CFG_DL8 0x0004
#define CFG_DL9 0x0008
#define CFG_NOPARITY 0x0000
#define CFG_PARITYEVEN 0x0020
#define CFG_PARITYODD 0x0030
#define CFG_STOP1 0x0000
#define CFG_STOP2 0x0040
#define CFG_CTSEN 0x0200
#define CFG_SYNCEN 0x0800
#define CFG_CLKPOL_FALL 0x0000
#define CFG_CLKPOL_RISE 0x1000
#define CFG_SYNC_SLV 0x0000
#define CFG_SYNC_MAST 0x4000
#define CFG_LOOP_EN 0x8000
#define CTRL_TXBRKEN 0x0002
#define CTRL_ADDRDET 0x0004
#define CTRL_TXDIS 0x0040
#define CTRL_CC 0x0100
#define CTRL_CLRCC 0x0200
#define STAT_RXRDY 0x0001
#define STAT_RXIDLE 0x0002
#define STAT_TXRDY 0x0004
#define STAT_TXIDLE 0x0008
#define STAT_CTS 0x0010
#define STAT_DELTACTS 0x0020
#define STAT_TXDIS 0x0040
#define STAT_OVERRUN 0x0100
#define STAT_RXBRK 0x0400
#define STAT_DELTARXBRK 0x0800
#define STAT_START 0x1000
#define STAT_FRAMERR 0x2000
#define STAT_PARITYERR 0x4000
#define STAT_RXNOISE 0x8000
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief UART0 driver enable switch.
* @details If set to @p TRUE the support for UART0 is included.
* @note The default is @p TRUE .
*/
#if !defined(LPC8xx_SERIAL_USE_UART0) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_USE_UART0 TRUE
#endif
/**
* @brief UART1 driver enable switch.
* @details If set to @p TRUE the support for UART1 is included.
* @note The default is @p FALSE .
*/
#if !defined(LPC8xx_SERIAL_USE_UART1) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_USE_UART1 FALSE
#endif
/**
* @brief UART2 driver enable switch.
* @details If set to @p TRUE the support for UART2 is included.
* @note The default is @p FALSE .
*/
#if !defined(LPC8xx_SERIAL_USE_UART2) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_USE_UART2 FALSE
#endif
/**
* @brief UART0 interrupt priority level setting.
*/
#if !defined(LPC8xx_SERIAL_UART0_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_UART0_IRQ_PRIORITY 3
#endif
/**
* @brief UART1 interrupt priority level setting.
*/
#if !defined(LPC8xx_SERIAL_UART1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_UART1_IRQ_PRIORITY 3
#endif
/**
* @brief UART2 interrupt priority level setting.
*/
#if !defined(LPC8xx_SERIAL_UART2_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_UART2_IRQ_PRIORITY 3
#endif
/**
* @brief Uart Baud Clock (U_PCLK).
* @details The Baud clock rate we would like to achieve.
* @note The default is @p 11.0592MHz.
* A multiple of 1.8432MHz will give accurate
* results at all standard baud rates .
*/
#if !defined(LPC8xx_SERIAL_U_PCLK) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_U_PCLK 11059200
#endif
/**
* @brief UARTCLKDIV divider.
*/
#if !defined(LPC8xx_SERIAL_UARTCLKDIV) || defined(__DOXYGEN__)
#define LPC8xx_SERIAL_UARTCLKDIV (LPC8xx_MAINCLK/LPC8xx_SERIAL_U_PCLK)
#endif
// Output from uart clock divider
#define LPC8xx_UARTDIVCLK (LPC8xx_MAINCLK/LPC8xx_SERIAL_UARTCLKDIV)
/**
* @brief UARTFRGDIV
* @details Fractional Baud rate generator denominator.
* @note If used, *must* be set to 256, otherwise set to 0
*/
#if !defined(LPC8xx_SERIAL_UARTFRGDIV) || defined(__DOXYGEN__)
#if (LPC8xx_SERIAL_UARTCLKDIV != LPC8xx_SERIAL_U_PCLK)
#define LPC8xx_SERIAL_UARTFRGDIV 0xFF
#else
#define LPC8xx_SERIAL_UARTFRGDIV 0x00
#endif
#endif
/**
* @brief UARTFRGMUL
* @details Fractional Baud rate generator numerator.
* Refer to LPC8xx User Manual 4.6.19 for calculation
* @note the *2, +1 and /2 are included to round to the nearest integer.
*/
#if !defined(LPC8xx_SERIAL_UARTFRGMUL) || defined(__DOXYGEN__)
#if (LPC8xx_SERIAL_UARTCLKDIV != LPC8xx_SERIAL_U_PCLK)
#define LPC8xx_SERIAL_UARTFRGMULT ( ( ( ( (LPC8xx_UARTDIVCLK- \
LPC8xx_SERIAL_U_PCLK) \
*256*2 ) \
/LPC8xx_SERIAL_U_PCLK ) \
+1 ) \
/2 )
#else
#define LPC8xx_SERIAL_UARTFRGMULT 0x00
#endif
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if (LPC8xx_SERIAL_UARTCLKDIV < 1) || (LPC8xx_SERIAL_UARTCLKDIV > 255)
#error "invalid LPC8xx_SERIAL_UARTCLKDIV setting"
#endif
#if (LPC8xx_SERIAL_UARTFRGDIV != 0) && (LPC8xx_SERIAL_UARTFRGDIV != 255)
#error "invalid LPC8xx_SERIAL_UARTFRGDIV setting"
#endif
#if (LPC8xx_SERIAL_UARTFRGMUL != 0) && (LPC8xx_SERIAL_UARTFRGMUL > 255)
#error "invalid LPC8xx_SERIAL_UARTFRGMUL setting"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief LPC8xx 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.
*/
typedef struct {
/**
* @brief Bit rate.
*/
uint32_t sc_speed;
/**
* @brief Initialization value for the CFG register.
*/
uint32_t sc_cfg;
} 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.*/ \
/* Pointer to the USART registers block.*/ \
LPC_USART_TypeDef *uart;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if LPC8xx_SERIAL_USE_UART0 && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if LPC8xx_SERIAL_USE_UART1 && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif
#if LPC8xx_SERIAL_USE_UART2 && !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);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SERIAL */
#endif /* _SERIAL_LLD_H_ */
/** @} */
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