rt-thread/bsp/stm32f10x/board.c

/*
 * File      : board.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 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
 * 2009-01-05     Bernard      first implementation
 */

#include <rthw.h>
#include <rtthread.h>

#include "stm32f10x.h"
#include "stm32f10x_fsmc.h"
#include "board.h"

/**
 * @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);
}

#if STM32_EXT_SRAM
void EXT_SRAM_Configuration(void)
{
	FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
	FSMC_NORSRAMTimingInitTypeDef  p;
	GPIO_InitTypeDef GPIO_InitStructure;

	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOG | RCC_APB2Periph_GPIOE |
						   RCC_APB2Periph_GPIOF, ENABLE);

	/*-- GPIO Configuration ------------------------------------------------------*/
	/* SRAM Data lines configuration */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_8 | GPIO_Pin_9 |
								  GPIO_Pin_10 | GPIO_Pin_14 | GPIO_Pin_15;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOD, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
								  GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
								  GPIO_Pin_15;
	GPIO_Init(GPIOE, &GPIO_InitStructure);

	/* SRAM Address lines configuration */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
								  GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_12 | GPIO_Pin_13 |
								  GPIO_Pin_14 | GPIO_Pin_15;
	GPIO_Init(GPIOF, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 |
								  GPIO_Pin_4 | GPIO_Pin_5;
	GPIO_Init(GPIOG, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
	GPIO_Init(GPIOD, &GPIO_InitStructure);

	/* NOE and NWE configuration */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 |GPIO_Pin_5;
	GPIO_Init(GPIOD, &GPIO_InitStructure);

	/* NE3 NE4 configuration */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_12;
	GPIO_Init(GPIOG, &GPIO_InitStructure);

	/* NBL0, NBL1 configuration */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
	GPIO_Init(GPIOE, &GPIO_InitStructure);

	/*-- FSMC Configuration ------------------------------------------------------*/
	p.FSMC_AddressSetupTime = 0;
	p.FSMC_AddressHoldTime = 0;
	p.FSMC_DataSetupTime = 2;
	p.FSMC_BusTurnAroundDuration = 0;
	p.FSMC_CLKDivision = 0;
	p.FSMC_DataLatency = 0;
	p.FSMC_AccessMode = FSMC_AccessMode_A;

	FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;
	FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
	FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
	FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
	FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
	FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
	FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
	FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
	FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
	FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
	FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
	FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
	FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
	FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;

	FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

	/* Enable FSMC Bank1_SRAM Bank */
	FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE);
}
#endif

/**
 * This is the timer interrupt service routine.
 *
 */
void rt_hw_timer_handler(void)
{
	/* enter interrupt */
	rt_interrupt_enter();

	rt_tick_increase();

	/* leave interrupt */
	rt_interrupt_leave();
}

/**
 * This function will initial STM32 board.
 */
void rt_hw_board_init()
{
	/* NVIC Configuration */
	NVIC_Configuration();

	/* Configure the SysTick */
	SysTick_Configuration();

#if STM32_EXT_SRAM
	EXT_SRAM_Configuration();
#endif

	rt_hw_usart_init();
	rt_console_set_device(CONSOLE_DEVICE);
}

/*@}*/