rt-thread/bsp/stm32f20x/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 "board.h"

/**
 * @addtogroup STM32
 */

/*@{*/

#if STM32_USE_SDIO


/**
  * @brief  DeInitializes the SDIO interface.
  * @param  None
  * @retval None
  */
void SD_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /*!< Disable SDIO Clock */
  SDIO_ClockCmd(DISABLE);
  
  /*!< Set Power State to OFF */
  SDIO_SetPowerState(SDIO_PowerState_OFF);

  /*!< DeInitializes the SDIO peripheral */
  SDIO_DeInit();
  
  /* Disable the SDIO APB2 Clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, DISABLE);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_MCO);

  /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PD.02 CMD line */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure PC.12 pin: CLK pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/**
  * @brief  Initializes the SD Card and put it into StandBy State (Ready for 
  *         data transfer).
  * @param  None
  * @retval None
  */
void SD_LowLevel_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;

  /* GPIOC and GPIOD Periph clock enable */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

  /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PD.02 CMD line */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure PC.12 pin: CLK pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);

  /* Enable the SDIO APB2 Clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);

  /* Enable the DMA2 Clock */
  RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);
}

/**
  * @brief  Configures the DMA2 Channel4 for SDIO Tx request.
  * @param  BufferSRC: pointer to the source buffer
  * @param  BufferSize: buffer size
  * @retval None
  */
void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize)
{
  DMA_InitTypeDef SDDMA_InitStructure;

  DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

  /* DMA2 Stream3  or Stream6 disable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

  /* DMA2 Stream3  or Stream6 Config */
  DMA_DeInit(SD_SDIO_DMA_STREAM);

  SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
  SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
  SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferSRC;
  SDDMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  SDDMA_InitStructure.DMA_BufferSize = 0;
  SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
  SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
  SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
  DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);

  DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

  /* DMA2 Stream3  or Stream6 enable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
    
}

/**
  * @brief  Configures the DMA2 Channel4 for SDIO Rx request.
  * @param  BufferDST: pointer to the destination buffer
  * @param  BufferSize: buffer size
  * @retval None
  */
void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize)
{
  DMA_InitTypeDef SDDMA_InitStructure;

  DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

  /* DMA2 Stream3  or Stream6 disable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

  /* DMA2 Stream3 or Stream6 Config */
  DMA_DeInit(SD_SDIO_DMA_STREAM);

  SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
  SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
  SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferDST;
  SDDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  SDDMA_InitStructure.DMA_BufferSize = 0;
  SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
  SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
  SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
  DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);

  DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

  /* DMA2 Stream3 or Stream6 enable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
}

/**
  * @brief  Returns the DMA End Of Transfer Status.
  * @param  None
  * @retval DMA SDIO Stream Status.
  */
uint32_t SD_DMAEndOfTransferStatus(void)
{
  return (uint32_t)DMA_GetFlagStatus(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_TCIF);
}
#endif

/*******************************************************************************
* 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 SysTick_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();

	rt_hw_usart_init();
#ifdef RT_USING_CONSOLE
	rt_console_set_device(CONSOLE_DEVICE);
#endif
}

/*@}*/