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