0bfa1b75e2
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5807 42af7a65-404d-4744-a932-0658087f49c3
625 lines
21 KiB
C
625 lines
21 KiB
C
/**************************************************************************
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* arch/arm/src/stm32/stm32_lowputc.c
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*
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* Copyright (C) 2009, 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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/**************************************************************************
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* Included Files
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**************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <arch/board/board.h>
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#include "up_internal.h"
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#include "up_arch.h"
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#include "chip.h"
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#include "stm32.h"
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#include "stm32_rcc.h"
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#include "stm32_gpio.h"
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#include "stm32_uart.h"
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/**************************************************************************
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* Private Definitions
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**************************************************************************/
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/* Select USART parameters for the selected console */
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#ifdef HAVE_CONSOLE
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# if defined(CONFIG_USART1_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_USART1_BASE
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# define STM32_APBCLOCK STM32_PCLK2_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_USART1_BAUD
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# define STM32_CONSOLE_BITS CONFIG_USART1_BITS
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# define STM32_CONSOLE_PARITY CONFIG_USART1_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_USART1_2STOP
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# define STM32_CONSOLE_TX GPIO_USART1_TX
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# define STM32_CONSOLE_RX GPIO_USART1_RX
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# ifdef CONFIG_USART1_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_USART1_RS485_DIR
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# if (CONFIG_USART1_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_USART2_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_USART2_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_USART2_BAUD
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# define STM32_CONSOLE_BITS CONFIG_USART2_BITS
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# define STM32_CONSOLE_PARITY CONFIG_USART2_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_USART2_2STOP
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# define STM32_CONSOLE_TX GPIO_USART2_TX
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# define STM32_CONSOLE_RX GPIO_USART2_RX
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# ifdef CONFIG_USART2_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_USART2_RS485_DIR
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# if (CONFIG_USART2_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_USART3_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_USART3_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_USART3_BAUD
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# define STM32_CONSOLE_BITS CONFIG_USART3_BITS
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# define STM32_CONSOLE_PARITY CONFIG_USART3_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_USART3_2STOP
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# define STM32_CONSOLE_TX GPIO_USART3_TX
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# define STM32_CONSOLE_RX GPIO_USART3_RX
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# ifdef CONFIG_USART3_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_USART3_RS485_DIR
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# if (CONFIG_USART3_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_UART4_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_UART4_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_UART4_BAUD
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# define STM32_CONSOLE_BITS CONFIG_UART4_BITS
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# define STM32_CONSOLE_PARITY CONFIG_UART4_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_UART4_2STOP
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# define STM32_CONSOLE_TX GPIO_UART4_TX
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# define STM32_CONSOLE_RX GPIO_UART4_RX
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# ifdef CONFIG_UART4_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_UART4_RS485_DIR
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# if (CONFIG_UART4_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_UART5_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_UART5_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_UART5_BAUD
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# define STM32_CONSOLE_BITS CONFIG_UART5_BITS
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# define STM32_CONSOLE_PARITY CONFIG_UART5_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_UART5_2STOP
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# define STM32_CONSOLE_TX GPIO_UART5_TX
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# define STM32_CONSOLE_RX GPIO_UART5_RX
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# ifdef CONFIG_UART5_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_UART5_RS485_DIR
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# if (CONFIG_UART5_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_USART6_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_USART6_BASE
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# define STM32_APBCLOCK STM32_PCLK2_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_USART6_BAUD
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# define STM32_CONSOLE_BITS CONFIG_USART6_BITS
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# define STM32_CONSOLE_PARITY CONFIG_USART6_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_USART6_2STOP
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# define STM32_CONSOLE_TX GPIO_USART6_TX
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# define STM32_CONSOLE_RX GPIO_USART6_RX
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# ifdef CONFIG_USART6_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_USART6_RS485_DIR
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# if (CONFIG_USART6_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_UART7_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_UART7_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_UART7_BAUD
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# define STM32_CONSOLE_BITS CONFIG_UART7_BITS
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# define STM32_CONSOLE_PARITY CONFIG_UART7_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_UART7_2STOP
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# define STM32_CONSOLE_TX GPIO_UART7_TX
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# define STM32_CONSOLE_RX GPIO_UART7_RX
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# ifdef CONFIG_UART7_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_UART7_RS485_DIR
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# if (CONFIG_UART7_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# elif defined(CONFIG_UART8_SERIAL_CONSOLE)
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# define STM32_CONSOLE_BASE STM32_UART8_BASE
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# define STM32_APBCLOCK STM32_PCLK1_FREQUENCY
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# define STM32_CONSOLE_BAUD CONFIG_UART8_BAUD
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# define STM32_CONSOLE_BITS CONFIG_UART8_BITS
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# define STM32_CONSOLE_PARITY CONFIG_UART8_PARITY
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# define STM32_CONSOLE_2STOP CONFIG_UART8_2STOP
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# define STM32_CONSOLE_TX GPIO_UART8_TX
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# define STM32_CONSOLE_RX GPIO_UART8_RX
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# ifdef CONFIG_UART8_RS485
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# define STM32_CONSOLE_RS485_DIR GPIO_UART8_RS485_DIR
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# if (CONFIG_UART8_RS485_DIR_POLARITY == 0)
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# define STM32_CONSOLE_RS485_DIR_POLARITY false
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# else
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# define STM32_CONSOLE_RS485_DIR_POLARITY true
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# endif
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# endif
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# endif
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/* CR1 settings */
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# if STM32_CONSOLE_BITS == 9
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# define USART_CR1_M_VALUE USART_CR1_M
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# else
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# define USART_CR1_M_VALUE 0
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# endif
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# if STM32_CONSOLE_PARITY == 1
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# define USART_CR1_PARITY_VALUE (USART_CR1_PCE|USART_CR1_PS)
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# elif STM32_CONSOLE_PARITY == 2
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# define USART_CR1_PARITY_VALUE USART_CR1_PCE
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# else
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# define USART_CR1_PARITY_VALUE 0
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# endif
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# ifdef CONFIG_STM32_STM32F30XX
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# define USART_CR1_CLRBITS\
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(USART_CR1_UESM | USART_CR1_RE | USART_CR1_TE | USART_CR1_PS |\
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USART_CR1_PCE |USART_CR1_WAKE | USART_CR1_M | USART_CR1_MME |\
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USART_CR1_OVER8 | USART_CR1_DEDT_MASK | USART_CR1_DEAT_MASK |\
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USART_CR1_ALLINTS)
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# else
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# define USART_CR1_CLRBITS\
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(USART_CR1_M | USART_CR1_PCE |USART_CR1_PS | USART_CR1_TE |\
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USART_CR1_RE | USART_CR1_ALLINTS)
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# endif
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# define USART_CR1_SETBITS (USART_CR1_M_VALUE|USART_CR1_PARITY_VALUE)
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/* CR2 settings */
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# if STM32_CONSOLE_2STOP != 0
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# define USART_CR2_STOP2_VALUE USART_CR2_STOP2
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# else
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# define USART_CR2_STOP2_VALUE 0
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# endif
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# ifdef CONFIG_STM32_STM32F30XX
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# define USART_CR2_CLRBITS \
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(USART_CR2_ADDM7 | USART_CR2_LBDL | USART_CR2_LBDIE | USART_CR2_LBCL |\
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USART_CR2_CPHA | USART_CR2_CPOL | USART_CR2_CLKEN | USART_CR2_STOP_MASK |\
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USART_CR2_LINEN | USART_CR2_RXINV | USART_CR2_TXINV | USART_CR2_DATAINV |\
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USART_CR2_MSBFIRST | USART_CR2_ABREN | USART_CR2_ABRMOD_MASK |\
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USART_CR2_RTOEN | USART_CR2_ADD8_MASK)
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# else
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# define USART_CR2_CLRBITS \
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(USART_CR2_STOP_MASK|USART_CR2_CLKEN|USART_CR2_CPOL|USART_CR2_CPHA|\
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USART_CR2_LBCL|USART_CR2_LBDIE)
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# endif
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# define USART_CR2_SETBITS USART_CR2_STOP2_VALUE
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/* CR3 settings */
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# ifdef CONFIG_STM32_STM32F30XX
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# define USART_CR3_CLRBITS \
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(USART_CR3_EIE | USART_CR3_IREN | USART_CR3_IRLP | USART_CR3_HDSEL |\
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USART_CR3_NACK | USART_CR3_SCEN | USART_CR3_DMAR | USART_CR3_DMAT |\
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USART_CR3_RTSE | USART_CR3_CTSE | USART_CR3_CTSIE | USART_CR1_ONEBIT |\
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USART_CR1_OVRDIS | USART_CR1_DDRE | USART_CR1_DEM | USART_CR1_DEP |\
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USART_CR1_SCARCNT_MASK | USART_CR1_WUS_MASK | USART_CR1_WUFIE)
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# else
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# define USART_CR3_CLRBITS \
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(USART_CR3_CTSIE|USART_CR3_CTSE|USART_CR3_RTSE|USART_CR3_EIE)
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# endif
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# define USART_CR3_SETBITS 0
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/* Only the STM32 F3 supports oversampling by 8 */
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# undef USE_OVER8
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/* Calculate USART BAUD rate divider */
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# ifdef CONFIG_STM32_STM32F30XX
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/* Baud rate for standard USART (SPI mode included):
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*
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* In case of oversampling by 16, the equation is:
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* baud = fCK / UARTDIV
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* UARTDIV = fCK / baud
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*
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* In case of oversampling by 8, the equation is:
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*
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* baud = 2 * fCK / UARTDIV
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* UARTDIV = 2 * fCK / baud
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*/
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# define STM32_USARTDIV8 \
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(((STM32_APBCLOCK << 1) + (STM32_CONSOLE_BAUD >> 1)) / STM32_CONSOLE_BAUD)
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# define STM32_USARTDIV16 \
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((STM32_APBCLOCK + (STM32_CONSOLE_BAUD >> 1)) / STM32_CONSOLE_BAUD)
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/* Use oversamply by 8 only if the divisor is small. But what is small? */
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# if STM32_USARTDIV8 > 100
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# define STM32_BRR_VALUE STM32_USARTDIV16
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# else
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# define USE_OVER8 1
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# define STM32_BRR_VALUE \
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((STM32_USARTDIV8 & 0xfff0) | ((STM32_USARTDIV8 & 0x000f) >> 1))
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# endif
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# else /* CONFIG_STM32_STM32F30XX */
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/* The baud rate for the receiver and transmitter (Rx and Tx) are both set
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* to the same value as programmed in the Mantissa and Fraction values of
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* USARTDIV.
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*
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* baud = fCK / (16 * usartdiv)
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* usartdiv = fCK / (16 * baud)
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*
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* Where fCK is the input clock to the peripheral (PCLK1 for USART2, 3, 4,
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* 5 or PCLK2 for USART1). Example, fCK=72MHz baud=115200,
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* usartdiv=39.0625=39 1/16th;
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*
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* First calculate:
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*
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* usartdiv32 = 32 * usartdiv = fCK / (baud/2)
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*
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* (NOTE: all standard baud values are even so dividing by two does not
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* lose precision). Eg. (same fCK and buad), usartdiv32 = 1250
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*/
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# define STM32_USARTDIV32 (STM32_APBCLOCK / (STM32_CONSOLE_BAUD >> 1))
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/* The mantissa is then usartdiv32 / 32:
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*
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* mantissa = usartdiv32 / 32/
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*
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* Eg. usartdiv32=1250, mantissa = 39
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*/
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# define STM32_MANTISSA (STM32_USARTDIV32 >> 5)
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/* And the fraction:
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*
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* fraction = (usartdiv32 - mantissa*32 + 1) / 2
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*
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* Eg., (1,250 - 39*32 + 1)/2 = 1 (or 0.0625)
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*/
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# define STM32_FRACTION \
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((STM32_USARTDIV32 - (STM32_MANTISSA << 5) + 1) >> 1)
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/* And, finally, the BRR value is: */
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# define STM32_BRR_VALUE \
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((STM32_MANTISSA << USART_BRR_MANT_SHIFT) | \
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(STM32_FRACTION << USART_BRR_FRAC_SHIFT))
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# endif /* CONFIG_STM32_STM32F30XX */
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#endif /* HAVE_CONSOLE */
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/**************************************************************************
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* Private Types
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**************************************************************************/
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/**************************************************************************
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* Private Function Prototypes
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**************************************************************************/
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/**************************************************************************
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* Global Variables
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**************************************************************************/
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/**************************************************************************
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* Private Variables
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**************************************************************************/
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/**************************************************************************
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* Private Functions
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**************************************************************************/
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/**************************************************************************
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* Public Functions
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**************************************************************************/
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/**************************************************************************
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* Name: up_lowputc
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*
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* Description:
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* Output one byte on the serial console
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*
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**************************************************************************/
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void up_lowputc(char ch)
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{
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#ifdef HAVE_CONSOLE
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/* Wait until the TX data register is empty */
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) & USART_SR_TXE) == 0);
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#if STM32_CONSOLE_RS485_DIR
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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/* Then send the character */
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putreg32((uint32_t)ch, STM32_CONSOLE_BASE + STM32_USART_TDR_OFFSET);
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#if STM32_CONSOLE_RS485_DIR
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while ((getreg32(STM32_CONSOLE_BASE + STM32_USART_SR_OFFSET) & USART_SR_TC) == 0);
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stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
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#endif
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#endif /* HAVE_CONSOLE */
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}
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/**************************************************************************
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* Name: stm32_lowsetup
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*
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* Description:
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* This performs basic initialization of the USART used for the serial
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* console. Its purpose is to get the console output availabe as soon
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* as possible.
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*
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**************************************************************************/
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#if defined(CONFIG_STM32_STM32F10XX)
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void stm32_lowsetup(void)
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{
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#if defined(HAVE_UART)
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uint32_t mapr;
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#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
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uint32_t cr;
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#endif
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/* Set up the pin mapping registers for the selected U[S]ARTs.
|
|
*
|
|
* NOTE: Clocking for selected U[S]ARTs was already provided in stm32_rcc.c
|
|
*/
|
|
|
|
mapr = getreg32(STM32_AFIO_MAPR);
|
|
|
|
#ifdef CONFIG_STM32_USART1
|
|
/* Assume default pin mapping:
|
|
*
|
|
* Alternate USART1_REMAP USART1_REMAP
|
|
* Function = 0 = 1
|
|
* ---------- ------------ ------------
|
|
* USART1_TX PA9 PB6
|
|
* USART1_RX PA10 PB7
|
|
*/
|
|
|
|
#ifdef CONFIG_STM32_USART1_REMAP
|
|
mapr |= AFIO_MAPR_USART1_REMAP;
|
|
#else
|
|
mapr &= ~AFIO_MAPR_USART1_REMAP;
|
|
#endif
|
|
#endif /* CONFIG_STM32_USART1 */
|
|
|
|
#ifdef CONFIG_STM32_USART2
|
|
/* Assume default pin mapping:
|
|
*
|
|
* Alternate USART2_REMAP USART2_REMAP
|
|
* Function = 0 = 1
|
|
* ---------- ------------ ------------
|
|
* USART2_CTS PA0 PD3
|
|
* USART2_RTS PA1 PD4
|
|
* USART2_TX PA2 PD5
|
|
* USART2_RX PA3 PD6
|
|
* USART3_CK PA4 PD7
|
|
*/
|
|
|
|
#ifdef CONFIG_STM32_USART2_REMAP
|
|
mapr |= AFIO_MAPR_USART2_REMAP;
|
|
#else
|
|
mapr &= ~AFIO_MAPR_USART2_REMAP;
|
|
#endif
|
|
#endif /* CONFIG_STM32_USART2 */
|
|
|
|
/* Assume default pin mapping:
|
|
*
|
|
* Alternate USART3_REMAP[1:0] USART3_REMAP[1:0] USART3_REMAP[1:0]
|
|
* Function = “00” (no remap) = “01” (partial remap) = “11” (full remap)
|
|
* ---------_ ------------------ ---------------------- --------------------
|
|
* USART3_TX PB10 PC10 PD8
|
|
* USART3_RX PB11 PC11 PD9
|
|
* USART3_CK PB12 PC12 PD10
|
|
* USART3_CTS PB13 PB13 PD11
|
|
* USART3_RTS PB14 PB14 PD12
|
|
*/
|
|
|
|
mapr &= ~AFIO_MAPR_USART3_REMAP_MASK;
|
|
|
|
#ifdef CONFIG_STM32_USART3
|
|
#if defined(CONFIG_STM32_USART3_PARTIAL_REMAP)
|
|
mapr |= AFIO_MAPR_USART3_PARTREMAP;
|
|
#elif defined(CONFIG_STM32_USART3_FULL_REMAP)
|
|
mapr |= AFIO_MAPR_USART3_FULLREMAP;
|
|
#endif
|
|
#endif /* CONFIG_STM32_USART3 */
|
|
|
|
putreg32(mapr, STM32_AFIO_MAPR);
|
|
|
|
/* Configure GPIO pins needed for rx/tx. */
|
|
|
|
#ifdef STM32_CONSOLE_TX
|
|
stm32_configgpio(STM32_CONSOLE_TX);
|
|
#endif
|
|
#ifdef STM32_CONSOLE_RX
|
|
stm32_configgpio(STM32_CONSOLE_RX);
|
|
#endif
|
|
|
|
#if STM32_CONSOLE_RS485_DIR
|
|
stm32_configgpio(STM32_CONSOLE_RS485_DIR);
|
|
stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
|
|
#endif
|
|
|
|
/* Enable and configure the selected console device */
|
|
|
|
#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
|
|
/* Configure CR2 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR2_OFFSET);
|
|
cr &= ~USART_CR2_CLRBITS;
|
|
cr |= USART_CR2_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR2_OFFSET);
|
|
|
|
/* Configure CR1 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
cr &= ~USART_CR1_CLRBITS;
|
|
cr |= USART_CR1_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
|
|
/* Configure CR3 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR3_OFFSET);
|
|
cr &= ~USART_CR3_CLRBITS;
|
|
cr |= USART_CR3_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR3_OFFSET);
|
|
|
|
/* Configure the USART Baud Rate */
|
|
|
|
putreg32(STM32_BRR_VALUE, STM32_CONSOLE_BASE + STM32_USART_BRR_OFFSET);
|
|
|
|
/* Enable Rx, Tx, and the USART */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
cr |= (USART_CR1_UE|USART_CR1_TE|USART_CR1_RE);
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
|
|
#endif /* HAVE_CONSOLE && !CONFIG_SUPPRESS_UART_CONFIG */
|
|
#endif /* HAVE_UART */
|
|
}
|
|
|
|
#elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F30XX) || defined(CONFIG_STM32_STM32F40XX)
|
|
|
|
void stm32_lowsetup(void)
|
|
{
|
|
#if defined(HAVE_UART)
|
|
#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
|
|
uint32_t cr;
|
|
#endif
|
|
|
|
/* Enable the console USART and configure GPIO pins needed for rx/tx.
|
|
*
|
|
* NOTE: Clocking for selected U[S]ARTs was already provided in stm32_rcc.c
|
|
*/
|
|
|
|
#ifdef STM32_CONSOLE_TX
|
|
stm32_configgpio(STM32_CONSOLE_TX);
|
|
#endif
|
|
#ifdef STM32_CONSOLE_RX
|
|
stm32_configgpio(STM32_CONSOLE_RX);
|
|
#endif
|
|
|
|
#if STM32_CONSOLE_RS485_DIR
|
|
stm32_configgpio(STM32_CONSOLE_RS485_DIR);
|
|
stm32_gpiowrite(STM32_CONSOLE_RS485_DIR, !STM32_CONSOLE_RS485_DIR_POLARITY);
|
|
#endif
|
|
|
|
/* Enable and configure the selected console device */
|
|
|
|
#if defined(HAVE_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
|
|
/* Configure CR2 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR2_OFFSET);
|
|
cr &= ~USART_CR2_CLRBITS;
|
|
cr |= USART_CR2_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR2_OFFSET);
|
|
|
|
/* Configure CR1 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
cr &= ~USART_CR1_CLRBITS;
|
|
cr |= USART_CR1_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
|
|
/* Configure CR3 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR3_OFFSET);
|
|
cr &= ~USART_CR3_CLRBITS;
|
|
cr |= USART_CR3_SETBITS;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR3_OFFSET);
|
|
|
|
/* Configure the USART Baud Rate */
|
|
|
|
putreg32(STM32_BRR_VALUE, STM32_CONSOLE_BASE + STM32_USART_BRR_OFFSET);
|
|
|
|
/* Select oversampling by 8 */
|
|
|
|
cr = getreg32(STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
#ifdef USE_OVER8
|
|
cr |= USART_CR1_OVER8;
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
#endif
|
|
|
|
/* Enable Rx, Tx, and the USART */
|
|
|
|
cr |= (USART_CR1_UE|USART_CR1_TE|USART_CR1_RE);
|
|
putreg32(cr, STM32_CONSOLE_BASE + STM32_USART_CR1_OFFSET);
|
|
|
|
#endif /* HAVE_CONSOLE && !CONFIG_SUPPRESS_UART_CONFIG */
|
|
#endif /* HAVE_UART */
|
|
}
|
|
|
|
#else
|
|
# error "Unsupported STM32 chip"
|
|
#endif
|
|
|
|
|