317 lines
7.7 KiB
C
317 lines
7.7 KiB
C
/**
|
||
******************************************************************************
|
||
* @file bsp_sdram.c
|
||
* @author fire
|
||
* @version V1.0
|
||
* @date 2015-xx-xx
|
||
* @brief sdram应用函数接口
|
||
******************************************************************************
|
||
* @attention
|
||
*
|
||
* 实验平台:野火 STM32 H750 开发板
|
||
* 论坛 :http://www.chuxue123.com
|
||
* 淘宝 :http://firestm32.taobao.com
|
||
*
|
||
******************************************************************************
|
||
*/
|
||
|
||
#include "./sdram/bsp_sdram.h"
|
||
//static FMC_SDRAM_CommandTypeDef Command;
|
||
SDRAM_HandleTypeDef hsdram1;
|
||
#define sdramHandle hsdram1
|
||
/**
|
||
* @brief 延迟一段时间
|
||
* @param 延迟的时间长度
|
||
* @retval None
|
||
*/
|
||
static void SDRAM_delay(__IO uint32_t nCount)
|
||
{
|
||
__IO uint32_t index = 0;
|
||
for(index = (100000 * nCount); index != 0; index--)
|
||
{
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief 初始化控制SDRAM的IO
|
||
* @param 无
|
||
* @retval 无
|
||
*/
|
||
static void SDRAM_GPIO_Config(void)
|
||
{
|
||
//使能GPIO口时钟
|
||
RCC->AHB4ENR |= 0x1FC;
|
||
|
||
//配置端口C、D、E、F、G、H、I相应的引脚为复用推挽输出
|
||
GPIOC->MODER = 0xFFFFFFFE;
|
||
GPIOC->OTYPER = 0;
|
||
GPIOC->OSPEEDR = 0x00000003;
|
||
GPIOC->PUPDR = 0x00000001;
|
||
GPIOC->AFR[0] = 0x0000000C;
|
||
|
||
GPIOD->MODER = 0xAFEAFFFA;
|
||
GPIOD->OTYPER = 0;
|
||
GPIOD->OSPEEDR = 0xF03F000F;
|
||
GPIOD->PUPDR = 0x50150005;
|
||
GPIOD->AFR[0] = 0x000000CC;
|
||
GPIOD->AFR[1] = 0xCC000CCC;
|
||
|
||
GPIOE->MODER = 0xAAAABFFA;
|
||
GPIOE->OTYPER = 0;
|
||
GPIOE->OSPEEDR = 0xFFFFC00F;
|
||
GPIOE->PUPDR = 0x55554005;
|
||
GPIOE->AFR[0] = 0xC00000CC;
|
||
GPIOE->AFR[1] = 0xCCCCCCCC;
|
||
|
||
GPIOF->MODER = 0xAABFFAAA;
|
||
GPIOF->OTYPER = 0;
|
||
GPIOF->OSPEEDR = 0xFFC00FFF;
|
||
GPIOF->PUPDR = 0x55400555;
|
||
GPIOF->AFR[0] = 0x00CCCCCC;
|
||
GPIOF->AFR[1] = 0xCCCCC000;
|
||
|
||
GPIOG->MODER = 0xBFFEFAEA;
|
||
GPIOG->OTYPER = 0;
|
||
GPIOG->OSPEEDR = 0xC0030F3F;
|
||
GPIOG->PUPDR = 0x40010515;
|
||
GPIOG->AFR[0] = 0x00CC0CCC;
|
||
GPIOG->AFR[1] = 0xC000000C;
|
||
|
||
GPIOH->MODER = 0xAAAAAFFF;
|
||
GPIOH->OTYPER = 0;
|
||
GPIOH->OSPEEDR = 0xFFFFF000;
|
||
GPIOH->PUPDR = 0x55555000;
|
||
GPIOH->AFR[0] = 0xCC000000;
|
||
GPIOH->AFR[1] = 0xCCCCCCCC;
|
||
|
||
GPIOI->MODER = 0xFFEBAAAA;
|
||
GPIOI->OTYPER = 0;
|
||
GPIOI->OSPEEDR = 0x003CFFFF;
|
||
GPIOI->PUPDR = 0x00145555;
|
||
GPIOI->AFR[0] = 0xCCCCCCCC;
|
||
GPIOI->AFR[1] = 0x00000CC0;
|
||
|
||
}
|
||
|
||
/**
|
||
* @brief 对SDRAM芯片进行初始化配置
|
||
* @param None.
|
||
* @retval None.
|
||
*/
|
||
static void SDRAM_InitSequence(void)
|
||
{
|
||
|
||
|
||
/* Step 1 ----------------------------------------------------------------*/
|
||
/* 配置命令：开启提供给SDRAM的时钟 */
|
||
FMC_Bank5_6->SDCMR = 0x00000009;
|
||
/* Step 2: 延时100us */
|
||
SDRAM_delay(1);
|
||
/* Step 3 ----------------------------------------------------------------*/
|
||
/* 配置命令：对所有的bank预充电 */
|
||
FMC_Bank5_6->SDCMR = 0x0000000A;
|
||
/* Step 4 ----------------------------------------------------------------*/
|
||
/* 配置命令：自动刷新 */
|
||
FMC_Bank5_6->SDCMR = 0x000000EB;
|
||
/* Step 5 ----------------------------------------------------------------*/
|
||
/* 设置sdram寄存器配置 */
|
||
FMC_Bank5_6->SDCMR = 0x0004600C;
|
||
/* Step 6 ----------------------------------------------------------------*/
|
||
/* 设置自刷新速率 */
|
||
FMC_Bank5_6->SDRTR |= (1855<<1);
|
||
}
|
||
|
||
|
||
/**
|
||
* @brief 初始化配置使用SDRAM的FMC及GPIO接口，
|
||
* 本函数在SDRAM读写操作前需要被调用
|
||
* @param None
|
||
* @retval None
|
||
*/
|
||
void SDRAM_Init(void)
|
||
{
|
||
|
||
/* 配置FMC接口相关的 GPIO*/
|
||
SDRAM_GPIO_Config();
|
||
|
||
//使能HSE
|
||
RCC->CR |= RCC_CR_HSEON;
|
||
while(!(RCC->CR&(1<<17)));
|
||
//选择HSE作为PLL时钟源
|
||
RCC->PLLCKSELR |= (1 << 1);
|
||
//使能PLL2R
|
||
RCC->PLLCKSELR |= (25 << 12);//PLL2M
|
||
RCC->PLLCFGR |= (1 << 21);
|
||
RCC->PLLCFGR &= ~(3 << 6);
|
||
RCC->PLLCFGR &= ~(1 << 5);
|
||
RCC->PLLCFGR &= ~(1 << 4);
|
||
RCC->PLL2DIVR |= (265 << 0);//PLL2N
|
||
RCC->PLL2DIVR |= (2 << 9);//PLL2P
|
||
RCC->PLL2DIVR |= (2 << 16);//PLL2Q
|
||
RCC->PLL2DIVR |= (2 << 24);//PLL2R
|
||
|
||
//使能PLL2
|
||
RCC->CR |= (1 << 26);
|
||
while(!(RCC->CR&(1<<27)));
|
||
RCC->D1CCIPR |= (2<<0);
|
||
|
||
(RCC->AHB3ENR |= (RCC_AHB3ENR_FMCEN));
|
||
|
||
FMC_Bank5_6->SDCR[FMC_SDRAM_BANK1] = 0x00003AD0;
|
||
FMC_Bank5_6->SDCR[FMC_SDRAM_BANK2] = 0x000001E9;
|
||
|
||
FMC_Bank5_6->SDTR[FMC_SDRAM_BANK1] = 0x0F1F7FFF;
|
||
FMC_Bank5_6->SDTR[FMC_SDRAM_BANK2] = 0x01010471;
|
||
|
||
__FMC_ENABLE();
|
||
/* FMC SDRAM 设备时序初始化 */
|
||
SDRAM_InitSequence();
|
||
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* @brief 以“字”为单位向sdram写入数据
|
||
* @param pBuffer: 指向数据的指针
|
||
* @param uwWriteAddress: 要写入的SDRAM内部地址
|
||
* @param uwBufferSize: 要写入数据大小
|
||
* @retval None.
|
||
*/
|
||
void SDRAM_WriteBuffer(uint32_t* pBuffer, uint32_t uwWriteAddress, uint32_t uwBufferSize)
|
||
{
|
||
__IO uint32_t write_pointer = (uint32_t)uwWriteAddress;
|
||
|
||
/* 禁止写保护 */
|
||
//HAL_SDRAM_WriteProtection_Disable(&hsdram1);
|
||
FMC_Bank5_6->SDCR[1] &= ~FMC_SDRAM_WRITE_PROTECTION_ENABLE;
|
||
/* 检查SDRAM标志，等待至SDRAM空闲 */
|
||
// while(HAL_SDRAM_GetState(&hsdram1) != RESET)
|
||
// {
|
||
// }
|
||
|
||
/* 循环写入数据 */
|
||
for (; uwBufferSize != 0; uwBufferSize--)
|
||
{
|
||
/* 发送数据到SDRAM */
|
||
*(uint32_t *) (SDRAM_BANK_ADDR + write_pointer) = *pBuffer++;
|
||
|
||
/* 地址自增*/
|
||
write_pointer += 4;
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* @brief 从SDRAM中读取数据
|
||
* @param pBuffer: 指向存储数据的buffer
|
||
* @param ReadAddress: 要读取数据的地十
|
||
* @param uwBufferSize: 要读取的数据大小
|
||
* @retval None.
|
||
*/
|
||
void SDRAM_ReadBuffer(uint32_t* pBuffer, uint32_t uwReadAddress, uint32_t uwBufferSize)
|
||
{
|
||
__IO uint32_t write_pointer = (uint32_t)uwReadAddress;
|
||
|
||
|
||
/* 检查SDRAM标志，等待至SDRAM空闲 */
|
||
// while ( HAL_SDRAM_GetState(&hsdram1) != RESET)
|
||
// {
|
||
// }
|
||
|
||
/*读取数据 */
|
||
for(; uwBufferSize != 0x00; uwBufferSize--)
|
||
{
|
||
*pBuffer++ = *(__IO uint32_t *)(SDRAM_BANK_ADDR + write_pointer );
|
||
|
||
/* 地址自增*/
|
||
write_pointer += 4;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* @brief 测试SDRAM是否正常
|
||
* @param None
|
||
* @retval 正常返回1，异常返回0
|
||
*/
|
||
uint8_t SDRAM_Test(void)
|
||
{
|
||
/*写入数据计数器*/
|
||
uint32_t counter=0;
|
||
|
||
/* 8位的数据 */
|
||
uint8_t ubWritedata_8b = 0, ubReaddata_8b = 0;
|
||
|
||
/* 16位的数据 */
|
||
uint16_t uhWritedata_16b = 0, uhReaddata_16b = 0;
|
||
|
||
SDRAM_INFO("正在检测SDRAM，以8位、16位的方式读写sdram...");
|
||
|
||
|
||
/*按8位格式读写数据，并校验*/
|
||
|
||
/* 把SDRAM数据全部重置为0 ，SDRAM_SIZE是以8位为单位的 */
|
||
for (counter = 0x00; counter < SDRAM_SIZE; counter++)
|
||
{
|
||
*(__IO uint8_t*) (SDRAM_BANK_ADDR + counter) = (uint8_t)0x0;
|
||
}
|
||
|
||
/* 向整个SDRAM写入数据 8位 */
|
||
for (counter = 0; counter < SDRAM_SIZE; counter++)
|
||
{
|
||
*(__IO uint8_t*) (SDRAM_BANK_ADDR + counter) = (uint8_t)(ubWritedata_8b + counter);
|
||
}
|
||
|
||
/* 读取 SDRAM 数据并检测*/
|
||
for(counter = 0; counter<SDRAM_SIZE;counter++ )
|
||
{
|
||
ubReaddata_8b = *(__IO uint8_t*)(SDRAM_BANK_ADDR + counter); //从该地址读出数据
|
||
|
||
if(ubReaddata_8b != (uint8_t)(ubWritedata_8b + counter)) //检测数据，若不相等，跳出函数,返回检测失败结果。
|
||
{
|
||
SDRAM_ERROR("8位数据读写错误！出错位置：%d",counter);
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
|
||
/*按16位格式读写数据，并检测*/
|
||
|
||
/* 把SDRAM数据全部重置为0 */
|
||
for (counter = 0x00; counter < SDRAM_SIZE/2; counter++)
|
||
{
|
||
*(__IO uint16_t*) (SDRAM_BANK_ADDR + 2*counter) = (uint16_t)0x00;
|
||
}
|
||
|
||
/* 向整个SDRAM写入数据 16位 */
|
||
for (counter = 0; counter < SDRAM_SIZE/2; counter++)
|
||
{
|
||
*(__IO uint16_t*) (SDRAM_BANK_ADDR + 2*counter) = (uint16_t)(uhWritedata_16b + counter);
|
||
}
|
||
|
||
/* 读取 SDRAM 数据并检测*/
|
||
for(counter = 0; counter<SDRAM_SIZE/2;counter++ )
|
||
{
|
||
uhReaddata_16b = *(__IO uint16_t*)(SDRAM_BANK_ADDR + 2*counter); //从该地址读出数据
|
||
|
||
if(uhReaddata_16b != (uint16_t)(uhWritedata_16b + counter)) //检测数据，若不相等，跳出函数,返回检测失败结果。
|
||
{
|
||
SDRAM_ERROR("16位数据读写错误！出错位置：%d",counter);
|
||
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
|
||
SDRAM_INFO("SDRAM读写测试正常！");
|
||
/*检测正常，return 1 */
|
||
return 1;
|
||
|
||
|
||
}
|
||
|
||
|
||
/*********************************************END OF FILE**********************/
|
||
|