From ccc33eb4d31331212de451f701e6d69c0f40ffbf Mon Sep 17 00:00:00 2001 From: patacongo Date: Sun, 17 Jan 2010 17:55:13 +0000 Subject: Add SAM3U clock and systick init logic git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2511 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/sam3u/sam3u_lowputc.c | 208 +++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100755 nuttx/arch/arm/src/sam3u/sam3u_lowputc.c (limited to 'nuttx/arch/arm/src/sam3u/sam3u_lowputc.c') diff --git a/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c b/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c new file mode 100755 index 000000000..399950a83 --- /dev/null +++ b/nuttx/arch/arm/src/sam3u/sam3u_lowputc.c @@ -0,0 +1,208 @@ +/************************************************************************** + * arch/arm/src/sam3u/sam3u_lowputc.c + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************/ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include + +#include + +#include +#include + +#include "up_internal.h" +#include "up_arch.h" + +#include "sam3u_internal.h" +#include "sam3u_pmc.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ + +/* Configuration **********************************************************/ + +#ifndef CONFIG_USART0_ISUART +# undef CONFIG_SAM3U_USART0 +#endif +#ifndef CONFIG_USART1_ISUART +# undef CONFIG_SAM3U_USART1 +#endif +#ifndef CONFIG_USART2_ISUART +# undef CONFIG_SAM3U_USART2 +#endif +#ifndef CONFIG_USART3_ISUART +# undef CONFIG_SAM3U_USART3 +#endif + +/* Is there a serial console? It could be on the UART, or USARTn */ + +#if defined(CONFIG_UART_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_UART) +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART0_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART0) +# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART1) +# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART2) +# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_SAM3U_USART3) +# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#else +# undef CONFIG_USART_SERIAL_CONSOLE +# undef CONFIG_USART0_SERIAL_CONSOLE +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# undef HAVE_CONSOLE +#endif + +/* Select USART parameters for the selected console */ + +#if defined(CONFIG_UART_SERIAL_CONSOLE) +# define SAM3U_CONSOLE_BASE SAM3U_UART_BASE +# define SAM3U_CONSOLE_BAUD CONFIG_USART_BAUD +# define SAM3U_CONSOLE_BITS CONFIG_USART_BITS +# define SAM3U_CONSOLE_PARITY CONFIG_USART_PARITY +# define SAM3U_CONSOLE_2STOP CONFIG_USART_2STOP +#elif defined(CONFIG_USART0_SERIAL_CONSOLE) +# define SAM3U_CONSOLE_BASE SAM3U_USART0_BASE +# define SAM3U_CONSOLE_BAUD CONFIG_USART0_BAUD +# define SAM3U_CONSOLE_BITS CONFIG_USART0_BITS +# define SAM3U_CONSOLE_PARITY CONFIG_USART0_PARITY +# define SAM3U_CONSOLE_2STOP CONFIG_USART0_2STOP +#elif defined(CONFIG_USART1_SERIAL_CONSOLE) +# define SAM3U_CONSOLE_BASE SAM3U_USART1_BASE +# define SAM3U_CONSOLE_BAUD CONFIG_USART1_BAUD +# define SAM3U_CONSOLE_BITS CONFIG_USART1_BITS +# define SAM3U_CONSOLE_PARITY CONFIG_USART1_PARITY +# define SAM3U_CONSOLE_2STOP CONFIG_USART1_2STOP +#elif defined(CONFIG_USART2_SERIAL_CONSOLE) +# define SAM3U_CONSOLE_BASE SAM3U_USART2_BASE +# define SAM3U_CONSOLE_BAUD CONFIG_USART2_BAUD +# define SAM3U_CONSOLE_BITS CONFIG_USART2_BITS +# define SAM3U_CONSOLE_PARITY CONFIG_USART2_PARITY +# define SAM3U_CONSOLE_2STOP CONFIG_USART2_2STOP +#elif defined(CONFIG_USART3_SERIAL_CONSOLE) +# define SAM3U_CONSOLE_BASE SAM3U_USART3_BASE +# define SAM3U_CONSOLE_BAUD CONFIG_USART3_BAUD +# define SAM3U_CONSOLE_BITS CONFIG_USART3_BITS +# define SAM3U_CONSOLE_PARITY CONFIG_USART3_PARITY +# define SAM3U_CONSOLE_2STOP CONFIG_USART3_2STOP +#else +# error "No CONFIG_U[S]ARTn_SERIAL_CONSOLE Setting" +#endif + +/************************************************************************** + * Private Types + **************************************************************************/ + +/************************************************************************** + * Private Function Prototypes + **************************************************************************/ + +/************************************************************************** + * Global Variables + **************************************************************************/ + +/************************************************************************** + * Private Variables + **************************************************************************/ + +/************************************************************************** + * Private Functions + **************************************************************************/ + +/************************************************************************** + * Public Functions + **************************************************************************/ + +/************************************************************************** + * Name: up_lowputc + * + * Description: + * Output one byte on the serial console + * + **************************************************************************/ + +void up_lowputc(char ch) +{ +#warning "To be provided" +} + +/************************************************************************** + * Name: sam3u_lowsetup + * + * Description: + * This performs basic initialization of the USART used for the serial + * console. Its purpose is to get the console output availabe as soon + * as possible. + * + **************************************************************************/ + +void sam3u_lowsetup(void) +{ + uint32_t regval; + +#warning "To be provided" + /* Enable clocking for the UART */ + + regval = getreg32(SAM3U_PMC_PCER); + regval |= (1 << SAM3U_PID_UART); + putreg32(regval, SAM3U_PMC_PCER); +} + + -- cgit v1.2.3