104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief STM32 debug support (implementation).
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*
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* \author Andrea Righi <arighi@develer.com>
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*/
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#include "kdebug_stm32.h"
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#include <cfg/cfg_debug.h>
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#include <drv/gpio_stm32.h>
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#include <drv/clock_stm32.h> /* RCC */
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#include <io/stm32.h>
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#if CONFIG_KDEBUG_PORT == 0
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#define UART_BASE ((struct stm32_usart *)USART1_BASE)
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#elif CONFIG_KDEBUG_PORT == 1
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#define UART_BASE ((struct stm32_usart *)USART2_BASE)
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#elif CONFIG_KDEBUG_PORT == 2
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#define UART_BASE ((struct stm32_usart *)USART3_BASE)
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#else
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#error "UART port not supported in this board"
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#endif
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#define KDBG_WAIT_READY() while (!(UART_BASE->SR & USART_FLAG_TXE))
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#define KDBG_WAIT_TXDONE() while (!(UART_BASE->SR & USART_FLAG_TC))
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#define KDBG_WRITE_CHAR(c) do { UART_BASE->DR = (c) & 0x1ff; } while(0)
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/* Debug unit is used only for debug purposes so does not generate interrupts. */
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#define KDBG_MASK_IRQ(old) do { (void)old; } while(0)
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/* Debug unit is used only for debug purposes so does not generate interrupts. */
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#define KDBG_RESTORE_IRQ(old) do { (void)old; } while(0)
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typedef uint32_t kdbg_irqsave_t;
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/* Initialize UART debug port */
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INLINE void kdbg_hw_init(void)
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{
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/* Enable clocking on AFIO */
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RCC->APB2ENR |= RCC_APB2_AFIO;
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/* Configure USART pins */
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#if CONFIG_KDEBUG_PORT == 0
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RCC->APB2ENR |= RCC_APB2_GPIOA;
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RCC->APB2ENR |= RCC_APB2_USART1;
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stm32_gpioPinConfig((struct stm32_gpio *)GPIOA_BASE, GPIO_USART1_TX_PIN,
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GPIO_MODE_AF_PP, GPIO_SPEED_50MHZ);
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#elif CONFIG_KDEBUG_PORT == 1
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RCC->APB2ENR |= RCC_APB2_GPIOA;
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RCC->APB1ENR |= RCC_APB1_USART2;
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stm32_gpioPinConfig((struct stm32_gpio *)GPIOA_BASE, GPIO_USART2_TX_PIN,
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GPIO_MODE_AF_PP, GPIO_SPEED_50MHZ);
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#elif CONFIG_KDEBUG_PORT == 2
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RCC->APB2ENR |= RCC_APB2_GPIOB;
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RCC->APB1ENR |= RCC_APB1_USART3;
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stm32_gpioPinConfig((struct stm32_gpio *)GPIOB_BASE, GPIO_USART3_TX_PIN,
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GPIO_MODE_AF_PP, GPIO_SPEED_50MHZ);
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#else
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#error "UART port not supported in this board"
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#endif
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/* Enable the USART by writing the UE bit */
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UART_BASE->CR1 |= CR1_RUN_SET;
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/* Configure the desired baud rate */
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UART_BASE->BRR = (uint16_t)evaluate_brr(UART_BASE, CPU_FREQ, CONFIG_KDEBUG_BAUDRATE);
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/* Set the Transmitter Enable bit in CR1 */
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UART_BASE->CR1 |= USART_MODE_TX;
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}
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