168 lines
4.4 KiB
C
168 lines
4.4 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009 RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-08-23 Bernard first implementation
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "stm32f10x.h"
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#include "board.h"
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static void rt_hw_console_init(void);
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/**
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* @addtogroup STM32
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*/
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/*@{*/
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/*******************************************************************************
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* Function Name : NVIC_Configuration
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* Description : Configures Vector Table base location.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void NVIC_Configuration(void)
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{
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#ifdef VECT_TAB_RAM
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/* Set the Vector Table base location at 0x20000000 */
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NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
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#else /* VECT_TAB_FLASH */
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/* Set the Vector Table base location at 0x08000000 */
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NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
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#endif
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}
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/*******************************************************************************
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* Function Name : SysTick_Configuration
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* Description : Configures the SysTick for OS tick.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void SysTick_Configuration(void)
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{
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RCC_ClocksTypeDef rcc_clocks;
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rt_uint32_t cnts;
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RCC_GetClocksFreq(&rcc_clocks);
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cnts = (rt_uint32_t)rcc_clocks.HCLK_Frequency / RT_TICK_PER_SECOND;
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SysTick_Config(cnts);
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
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}
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void rt_hw_timer_handler(void)
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{
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rt_tick_increase();
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}
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/**
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* This function will initial STM32 board.
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*/
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void rt_hw_board_init()
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{
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/* NVIC Configuration */
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NVIC_Configuration();
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/* Configure the SysTick */
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SysTick_Configuration();
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rt_hw_console_init();
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}
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/* init console to support rt_kprintf */
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static void rt_hw_console_init()
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{
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/* Enable USART1 and GPIOA clocks */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
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/* GPIO configuration */
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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/* Configure USART1 Tx (PA.09) as alternate function push-pull */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* Configure USART1 Rx (PA.10) as input floating */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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}
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/* USART configuration */
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{
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USART_InitTypeDef USART_InitStructure;
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/* USART1 configured as follow:
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- BaudRate = 115200 baud
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- Word Length = 8 Bits
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- One Stop Bit
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- No parity
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- Hardware flow control disabled (RTS and CTS signals)
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- Receive and transmit enabled
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- USART Clock disabled
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- USART CPOL: Clock is active low
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- USART CPHA: Data is captured on the middle
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- USART LastBit: The clock pulse of the last data bit is not output to
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the SCLK pin
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*/
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART1, &USART_InitStructure);
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/* Enable USART1 */
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USART_Cmd(USART1, ENABLE);
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}
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}
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/* write one character to serial, must not trigger interrupt */
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static void rt_hw_console_putc(const char c)
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{
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/*
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to be polite with serial console add a line feed
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to the carriage return character
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*/
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if (c=='\n')rt_hw_console_putc('\r');
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while (!(USART1->SR & USART_FLAG_TXE));
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USART1->DR = (c & 0x1FF);
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}
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/**
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* This function is used by rt_kprintf to display a string on console.
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*
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* @param str the displayed string
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*/
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void rt_hw_console_output(const char* str)
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{
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while (*str)
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{
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rt_hw_console_putc (*str++);
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}
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}
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/*@}*/
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