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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-09-26 00:09:17 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-09-26 00:09:17 +0000 |
commit | db457913b33ab75f743e6b9a11931f9d962f2910 (patch) | |
tree | 961582bf1fdf1ade49f8e5cc9ba98a87e2a3b8f7 /nuttx/arch/arm/src/stm32/stm32_lowputc.c | |
parent | 3fc90aa488afa2f9240a6778895365462171718c (diff) | |
download | px4-nuttx-db457913b33ab75f743e6b9a11931f9d962f2910.tar.gz px4-nuttx-db457913b33ab75f743e6b9a11931f9d962f2910.tar.bz2 px4-nuttx-db457913b33ab75f743e6b9a11931f9d962f2910.zip |
Add framework (only) for STM32 USART support
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2094 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_lowputc.c')
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_lowputc.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_lowputc.c b/nuttx/arch/arm/src/stm32/stm32_lowputc.c new file mode 100644 index 000000000..4ed14ee23 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/stm32_lowputc.c @@ -0,0 +1,176 @@ +/************************************************************************** + * arch/arm/src/stm32/stm32_lowputc.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <nuttx/config.h> +#include <sys/types.h> + +#include "up_internal.h" +#include "up_arch.h" + +#include "chip.h" +#include "stm32_internal.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ + +/* Configuration **********************************************************/ + +/* Is there a serial console? */ + +#if defined(CONFIG_USART1_SERIAL_CONSOLE) && !defined(CONFIG_USART1_DISABLE) +# undef CONFIG_USART2_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && !defined(CONFIG_USART2_DISABLE) +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART3_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && !defined(CONFIG_USART3_DISABLE) +# undef CONFIG_USART1_SERIAL_CONSOLE +# undef CONFIG_USART2_SERIAL_CONSOLE +# define HAVE_CONSOLE 1 +#else +# 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_USART1_SERIAL_CONSOLE) +# define STM32_CONSOLE_BASE STM32_USART1_BASE +# define STM32_CONSOLE_BAUD CONFIG_USART1_BAUD +# define STM32_CONSOLE_BITS CONFIG_USART1_BITS +# define STM32_CONSOLE_PARITY CONFIG_USART1_PARITY +# define STM32_CONSOLE_2STOP CONFIG_USART1_2STOP +#elif defined(CONFIG_USART2_SERIAL_CONSOLE) +# define STM32_CONSOLE_BASE STM32_USART2_BASE +# define STM32_CONSOLE_BAUD CONFIG_USART2_BAUD +# define STM32_CONSOLE_BITS CONFIG_USART2_BITS +# define STM32_CONSOLE_PARITY CONFIG_USART2_PARITY +# define STM32_CONSOLE_2STOP CONFIG_USART2_2STOP +#elif defined(CONFIG_USART3_SERIAL_CONSOLE) +# define STM32_CONSOLE_BASE STM32_USART2_BASE +# define STM32_CONSOLE_BAUD CONFIG_USART2_BAUD +# define STM32_CONSOLE_BITS CONFIG_USART2_BITS +# define STM32_CONSOLE_PARITY CONFIG_USART2_PARITY +# define STM32_CONSOLE_2STOP CONFIG_USART2_2STOP +#else +# error "No CONFIG_USARTn_SERIAL_CONSOLE Setting" +#endif + +/* Calculate BAUD rate from the SYS clock */ + +/************************************************************************** + * 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) +{ +#ifdef HAVE_CONSOLE + /* Wait until the TX FIFO is not full */ + + + /* Then send the character */ +#endif +} + +/************************************************************************** + * Name: up_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 up_lowsetup(void) +{ + /* Enable the selected USARTs and configure GPIO pins need byed the + * the selected USARTs. NOTE: The serial driver later depends on + * this pin configuration -- whether or not a serial console is selected. + */ + +#ifndef CONFIG_USART1_DISABLE +#endif + +#ifndef CONFIG_USART1_DISABLE +#endif + +#ifndef CONFIG_USART2_DISABLE +#endif + + /* Enable and configure the selected console device */ + +#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_USART_CONFIG) +#endif +} + + |