/** ****************************************************************************** * @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