diff options
Diffstat (limited to 'nuttx/arch/arm/src/kinetis/kinetis_lowputc.c')
| -rwxr-xr-x | nuttx/arch/arm/src/kinetis/kinetis_lowputc.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/kinetis/kinetis_lowputc.c b/nuttx/arch/arm/src/kinetis/kinetis_lowputc.c new file mode 100755 index 000000000..e403d4706 --- /dev/null +++ b/nuttx/arch/arm/src/kinetis/kinetis_lowputc.c @@ -0,0 +1,263 @@ +/************************************************************************** + * arch/arm/src/kinetis/kinetis_lowputc.c + * + * Copyright (C) 2011 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 <stdint.h> + +#include <arch/irq.h> +#include <arch/board/board.h> + +#include "up_internal.h" +#include "up_arch.h" + +#include "kinetis_config.h" +#include "kinetis_internal.h" +#include "kinetis_uart.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ + +/* Select UART parameters for the selected console */ + +#if defined(CONFIG_UART0_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART0_BASE +# define CONSOLE_BAUD CONFIG_UART0_BAUD +# define CONSOLE_BITS CONFIG_UART0_BITS +# define CONSOLE_PARITY CONFIG_UART0_PARITY +# define CONSOLE_2STOP CONFIG_UART0_2STOP +#elif defined(CONFIG_UART1_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART1_BASE +# define CONSOLE_BAUD CONFIG_UART1_BAUD +# define CONSOLE_BITS CONFIG_UART1_BITS +# define CONSOLE_PARITY CONFIG_UART1_PARITY +# define CONSOLE_2STOP CONFIG_UART1_2STOP +#elif defined(CONFIG_UART2_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART2_BASE +# define CONSOLE_BAUD CONFIG_UART2_BAUD +# define CONSOLE_BITS CONFIG_UART2_BITS +# define CONSOLE_PARITY CONFIG_UART2_PARITY +# define CONSOLE_2STOP CONFIG_UART2_2STOP +#elif defined(CONFIG_UART3_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART3_BASE +# define CONSOLE_BAUD CONFIG_UART3_BAUD +# define CONSOLE_BITS CONFIG_UART3_BITS +# define CONSOLE_PARITY CONFIG_UART3_PARITY +# define CONSOLE_2STOP CONFIG_UART3_2STOP +#elif defined(CONFIG_UART4_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART4_BASE +# define CONSOLE_BAUD CONFIG_UART4_BAUD +# define CONSOLE_BITS CONFIG_UART4_BITS +# define CONSOLE_PARITY CONFIG_UART4_PARITY +# define CONSOLE_2STOP CONFIG_UART4_2STOP +#elif defined(CONFIG_UART5_SERIAL_CONSOLE) +# define CONSOLE_BASE KINETIS_UART5_BASE +# define CONSOLE_BAUD CONFIG_UART5_BAUD +# define CONSOLE_BITS CONFIG_UART5_BITS +# define CONSOLE_PARITY CONFIG_UART5_PARITY +# define CONSOLE_2STOP CONFIG_UART5_2STOP +#elif defined(HAVE_CONSOLE) +# error "No CONFIG_UARTn_SERIAL_CONSOLE Setting" +#endif + +/* Get word length setting for the console */ +# warning "Missing logic" + +/* Get parity setting for the console */ +# warning "Missing logic" + +/* Get stop-bit setting for the console and UART0-3 */ +# warning "Missing logic" + +/* Select a divider to produce the UART CLK */ +# warning "Missing logic" + +/************************************************************************** + * 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) +{ +#if defined HAVE_UART && defined HAVE_CONSOLE +# warning "Missing logic" +#endif +} + +/************************************************************************** + * Name: kinetis_lowsetup + * + * Description: + * This performs basic initialization of the UART used for the serial + * console. Its purpose is to get the console output availabe as soon + * as possible. + * + * The UART0/1/2/3 peripherals are configured using the following registers: + * 1. Power: In the PCONP register, set bits PCUART0/1/2/3. + * On reset, UART0 and UART 1 are enabled (PCUART0 = 1 and PCUART1 = 1) + * and UART2/3 are disabled (PCUART1 = 0 and PCUART3 = 0). + * 2. Peripheral clock: In the PCLKSEL0 register, select PCLK_UART0 and + * PCLK_UART1; in the PCLKSEL1 register, select PCLK_UART2 and PCLK_UART3. + * 3. Baud rate: In the LCR register, set bit DLAB = 1. This enables access + * to registers DLL and DLM for setting the baud rate. Also, if needed, + * set the fractional baud rate in the fractional divider + * 4. UART FIFO: Use bit FIFO enable (bit 0) in FCR register to + * enable FIFO. + * 5. Pins: Select UART pins through the PINSEL registers and pin modes + * through the PINMODE registers. UART receive pins should not have + * pull-down resistors enabled. + * 6. Interrupts: To enable UART interrupts set bit DLAB = 0 in the LCRF + * register. This enables access to IER. Interrupts are enabled + * in the NVIC using the appropriate Interrupt Set Enable register. + * 7. DMA: UART transmit and receive functions can operate with the + * GPDMA controller. + * + **************************************************************************/ + +void kinetis_lowsetup(void) +{ +#ifdef HAVE_UART + uint32_t regval; + + /* Step 1: Enable power for all console UART and disable power for + * other UARTs + */ + +# warning "Missing logic" + + /* Step 2: Enable peripheral clocking for the console UART and disable + * clocking for all other UARTs + */ + +# warning "Missing logic" + + /* Configure UART pins for the selected CONSOLE */ + +#if defined(CONFIG_UART0_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART0_TXD); + kinetis_configgpio(GPIO_UART0_RXD); +#elif defined(CONFIG_UART1_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART1_TXD); + kinetis_configgpio(GPIO_UART1_RXD); +#elif defined(CONFIG_UART2_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART2_TXD); + kinetis_configgpio(GPIO_UART2_RXD); +#elif defined(CONFIG_UART3_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART3_TXD); + kinetis_configgpio(GPIO_UART3_RXD); +#elif defined(CONFIG_UART4_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART3_TXD); + kinetis_configgpio(GPIO_UART3_RXD); +#elif defined(CONFIG_UART5_SERIAL_CONSOLE) + kinetis_configgpio(GPIO_UART3_TXD); + kinetis_configgpio(GPIO_UART3_RXD); +#endif + + /* Configure the console (only) */ + +#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG) + + kinetis_uartconfigure(CONSOLE_BASE, CONSOLE_BAUD, CONSOLE_PARITY, + CONSOLE_BITS, CONSOLE_2STOP); +#endif +#endif /* HAVE_UART */ +} + +/****************************************************************************** + * Name: kinetis_uartreset + * + * Description: + * Reset a UART. + * + ******************************************************************************/ + +#ifdef HAVE_UART_DEVICE +void kinetis_uartreset(uintptr_t uart_base) +{ +# warning "Missing logic" +} +#endif + +/****************************************************************************** + * Name: kinetis_uartconfigure + * + * Description: + * Configure a UART as a RS-232 UART. + * + ******************************************************************************/ + +#ifdef HAVE_UART_DEVICE +void kinetis_uartconfigure(uintptr_t uart_base, uint32_t baudrate, + unsigned int parity, unsigned int nbits, + bool stop2) +{ +# warning "Missing logic" +} +#endif + + + |