From f5fede8183545412ed7e34798ee132570eee15b5 Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Mon, 30 Sep 2013 09:11:54 -0600 Subject: KL25Z: Add low-level up_lowgetc function that can be used to provide an NSH console when the file system (and hence the serial driver) is disabled. From Alan Carvalho de Assis --- nuttx/arch/arm/src/kl/kl_lowgetc.c | 129 +++++++++++++++++++++++++++++++++++++ nuttx/arch/arm/src/kl/kl_lowgetc.h | 82 +++++++++++++++++++++++ 2 files changed, 211 insertions(+) create mode 100644 nuttx/arch/arm/src/kl/kl_lowgetc.c create mode 100644 nuttx/arch/arm/src/kl/kl_lowgetc.h (limited to 'nuttx/arch') diff --git a/nuttx/arch/arm/src/kl/kl_lowgetc.c b/nuttx/arch/arm/src/kl/kl_lowgetc.c new file mode 100644 index 000000000..b46b184b1 --- /dev/null +++ b/nuttx/arch/arm/src/kl/kl_lowgetc.c @@ -0,0 +1,129 @@ +/************************************************************************** + * arch/arm/src/kl/kl_lowgetc.c + * + * Copyright (C) 2013 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 "kl_config.h" +#include "kl_getputc.h" + +#include "chip/kl_uart.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ +/* Select UART parameters for the selected console */ + +#if defined(CONFIG_UART0_SERIAL_CONSOLE) +# define CONSOLE_BASE KL_UART0_BASE +# define CONSOLE_FREQ BOARD_CORECLK_FREQ +# define CONSOLE_BAUD CONFIG_UART0_BAUD +# define CONSOLE_BITS CONFIG_UART0_BITS +# define CONSOLE_PARITY CONFIG_UART0_PARITY +#elif defined(CONFIG_UART1_SERIAL_CONSOLE) +# define CONSOLE_BASE KL_UART1_BASE +# define CONSOLE_FREQ BOARD_BUSCLK_FREQ +# define CONSOLE_BAUD CONFIG_UART1_BAUD +# define CONSOLE_BITS CONFIG_UART1_BITS +# define CONSOLE_PARITY CONFIG_UART1_PARITY +#elif defined(CONFIG_UART2_SERIAL_CONSOLE) +# define CONSOLE_BASE KL_UART2_BASE +# define CONSOLE_FREQ BOARD_BUSCLK_FREQ +# define CONSOLE_BAUD CONFIG_UART2_BAUD +# define CONSOLE_BITS CONFIG_UART2_BITS +# define CONSOLE_PARITY CONFIG_UART2_PARITY +#endif + +/************************************************************************** + * Private Types + **************************************************************************/ + +/************************************************************************** + * Private Function Prototypes + **************************************************************************/ + +/************************************************************************** + * Global Variables + **************************************************************************/ + +/************************************************************************** + * Private Variables + **************************************************************************/ + +/************************************************************************** + * Private Functions + **************************************************************************/ + +/************************************************************************** + * Public Functions + **************************************************************************/ + +/************************************************************************** + * Name: up_lowgetc + * + * Description: + * Input one byte from the serial console + * + **************************************************************************/ + +uint32_t kl_lowgetc(void) +{ + uint8_t ch = 0; + +#if defined HAVE_UART_DEVICE && defined HAVE_SERIAL_CONSOLE + /* Wait while the receiver data buffer is "empty" (RDRF) to assure that + * we have data in the buffer to read. + */ + + while ((getreg8(CONSOLE_BASE+KL_UART_S1_OFFSET) & UART_S1_RDRF) == 0); + + /* Then read a character from the UART data register */ + + ch = getreg8(CONSOLE_BASE+KL_UART_D_OFFSET); +#endif + + return (int) ch; +} diff --git a/nuttx/arch/arm/src/kl/kl_lowgetc.h b/nuttx/arch/arm/src/kl/kl_lowgetc.h new file mode 100644 index 000000000..4ed52365a --- /dev/null +++ b/nuttx/arch/arm/src/kl/kl_lowgetc.h @@ -0,0 +1,82 @@ +/************************************************************************************ + * arch/arm/src/kl/kl_lowgetc.h + * + * Copyright (C) 2013 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. + * + ************************************************************************************/ + +#ifndef __ARCH_ARM_SRC_KL_KINETIS_LOWGETC_H +#define __ARCH_ARM_SRC_KL_KINETIS_LOWGETC_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include +#include "kl_config.h" + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/************************************************************************************ + * Public Types + ************************************************************************************/ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +#ifndef __ASSEMBLY__ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" +{ +#else +#define EXTERN extern +#endif + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +#ifdef HAVE_SERIAL_CONSOLE +int kl_lowgetc(void); +#endif + +#undef EXTERN +#if defined(__cplusplus) +} +#endif +#endif /* __ASSEMBLY__ */ +#endif /* __ARCH_ARM_SRC_KL_KINETIS_LOWGETC_H */ -- cgit v1.2.3