55ad295582
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4931 42af7a65-404d-4744-a932-0658087f49c3
157 lines
5.3 KiB
C
157 lines
5.3 KiB
C
/****************************************************************************
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* arch/arm/src/lpc43xx/lpc43_uart.h
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_LPC43XX_LPC43_LOWSETUP_H
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#define __ARCH_ARM_SRC_LPC43XX_LPC43_LOWSETUP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "chip.h"
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#include "chip/lpc43_uart.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lpc43_lowsetup
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*
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* Description:
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* Called at the very beginning of _start. Performs low level
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* initialization of the serial console.
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*
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****************************************************************************/
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EXTERN void lpc43_lowsetup(void);
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/****************************************************************************
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* Name: lpc43_usart0_reset, lpc43_uart1_reset, lpc43_usart2_reset, and
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* lpc43_usart3_reset
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*
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* Description:
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* Reset a U[S]ART. These functions are used by the serial driver when a
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* U[S]ART is closed.
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*
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****************************************************************************/
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#ifdef CONFIG_LPC43_USART0
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EXTERN void lpc43_usart0_reset(void);
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#endif
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#ifdef CONFIG_LPC43_UART1
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EXTERN void lpc43_uart1_reset(void);
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#endif
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#ifdef CONFIG_LPC43_USART2
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EXTERN void lpc43_usart2_reset(void);
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#endif
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#ifdef CONFIG_LPC43_USART3
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EXTERN void lpc43_usart3_reset(void);
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#endif
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/****************************************************************************
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* Name: lpc43_usart0_setup, lpc43_uart1_setup, lpc43_usart2_setup, and
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* lpc43_usart3_setup
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*
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* Description:
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* Configure the U[S]ART. This involves:
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*
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* 1. Connecting the input clock to the U[S]ART as specified in the
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* board.h file,
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* 2. Configuring the U[S]ART pins
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*
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****************************************************************************/
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#ifdef CONFIG_LPC43_USART0
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EXTERN void lpc43_usart0_setup(void);
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#endif
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#ifdef CONFIG_LPC43_UART1
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EXTERN void lpc43_uart1_setup(void);
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#endif
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#ifdef CONFIG_LPC43_USART2
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EXTERN void lpc43_usart2_setup(void);
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#endif
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#ifdef CONFIG_LPC43_USART3
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EXTERN void lpc43_usart3_setup(void);
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#endif
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/****************************************************************************
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* Name: lpc43_setbaud
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*
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* Description:
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* Configure the U[S]ART divisors to accomplish the desired BAUD given the
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* U[S]ART base frequency.
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*
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* This computationally intensive algorithm is based on the same logic
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* used in the NXP sample code.
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*
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****************************************************************************/
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EXTERN void lpc43_setbaud(uintptr_t uartbase, uint32_t basefreq, uint32_t baud);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_LPC43XX_LPC43_LOWSETUP_H */
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