261 lines
6.6 KiB
C
261 lines
6.6 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://openlab.rt-thread.com/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_lib.h"
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static void rt_hw_console_init(void);
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/**
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* @addtogroup STM32SKY
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*/
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/*@{*/
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ErrorStatus HSEStartUpStatus;
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/*******************************************************************************
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* Function Name : RCC_Configuration
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* Description : Configures the different system clocks.
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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 RCC_Configuration(void)
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{
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/* RCC system reset(for debug purpose) */
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RCC_DeInit();
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/* Enable HSE */
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RCC_HSEConfig(RCC_HSE_ON);
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/* Wait till HSE is ready */
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HSEStartUpStatus = RCC_WaitForHSEStartUp();
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if(HSEStartUpStatus == SUCCESS)
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{
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/* HCLK = SYSCLK */
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RCC_HCLKConfig(RCC_SYSCLK_Div1);
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/* PCLK2 = HCLK */
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RCC_PCLK2Config(RCC_HCLK_Div1);
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/* PCLK1 = HCLK/2 */
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RCC_PCLK1Config(RCC_HCLK_Div2);
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/* Flash 2 wait state */
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FLASH_SetLatency(FLASH_Latency_2);
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/* Enable Prefetch Buffer */
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FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
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/* PLLCLK = 8MHz * 9 = 72 MHz */
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RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
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/* Enable PLL */
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RCC_PLLCmd(ENABLE);
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/* Wait till PLL is ready */
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while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) ;
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/* Select PLL as system clock source */
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RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
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/* Wait till PLL is used as system clock source */
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while(RCC_GetSYSCLKSource() != 0x08) ;
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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_SetReload(cnts);
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
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SysTick_CounterCmd(SysTick_Counter_Enable);
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SysTick_ITConfig(ENABLE);
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}
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extern void rt_hw_interrupt_thread_switch(void);
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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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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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rt_hw_interrupt_thread_switch();
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}
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static void FSMC_SRAM_Init(void)
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{
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#define REG32(x) (*(volatile unsigned long*)(x))
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/* enable FSMC clock */
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REG32(0x40021014) = 0x114;
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/* enable GPIOD, GPIOE, GPIOF and GPIOG clocks */
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REG32(0x40021018) = 0x1e0;
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/* SRAM Data lines, NOE and NWE configuration */
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REG32(0x40011400) = 0x44BB44BB;
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REG32(0x40011404) = 0xBBBBBBBB;
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REG32(0x40011800) = 0xB44444BB;
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REG32(0x40011804) = 0xBBBBBBBB;
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REG32(0x40011C00) = 0x44BBBBBB;
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REG32(0x40011C04) = 0xBBBB4444;
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REG32(0x40012000) = 0x44BBBBBB;
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REG32(0x40012004) = 0x44444B44;
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/* FSMC Configuration (enable FSMC Bank1_SRAM Bank) */
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REG32(0xA0000010) = 0x00001011;
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REG32(0xA0000014) = 0x00000200;
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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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/* Configure the system clocks */
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RCC_Configuration();
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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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/* Configure SRAM on the board */
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FSMC_SRAM_Init();
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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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