STM32F767 FMC SDRAM W9825G6KH 低功耗模式下自我刷新

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已于 2022-12-01 21:47:17 修改 · 530 阅读

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于 2021-11-24 13:08:40 首次发布

/* Private variables ---------------------------------------------------------*/

SDRAM_HandleTypeDef hsdram1;

/* USER CODE BEGIN PV */


/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_FMC_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

#define DATA_SIZE 10000
#define DATA_ADDR 380

static void Sdram_SendCommand(uint32_t CommandMode, uint32_t CommandTarget, uint32_t AutoRefreshNumber, uint32_t ModeRegisterDefinition)
{
	FMC_SDRAM_CommandTypeDef Command;
	
	Command.AutoRefreshNumber = AutoRefreshNumber;
	Command.CommandMode = CommandMode;
	Command.CommandTarget = CommandTarget;
	Command.ModeRegisterDefinition = ModeRegisterDefinition;
	
	HAL_SDRAM_SendCommand(&hsdram1, &Command, 0);
}

static void Sdram_Init_Sequence(void)
{
	uint32_t ModeRegisterDefinition;
//	uint16_t Mode_WB;
//	uint16_t Mode_Op;
//	uint16_t Mode_CasLatency;
//	uint16_t Mode_Bt;
//	uint16_t Mode_BurstLength;
	
	Sdram_SendCommand(FMC_SDRAM_CMD_CLK_ENABLE, FMC_SDRAM_CMD_TARGET_BANK1, 0, 0);
	
	delay_us(200);
	
	Sdram_SendCommand(FMC_SDRAM_CMD_PALL, FMC_SDRAM_CMD_TARGET_BANK1, 0, 0);
	
	Sdram_SendCommand(FMC_SDRAM_CMD_AUTOREFRESH_MODE, FMC_SDRAM_CMD_TARGET_BANK1, 1, 0);
	
	//SDRAMÅäÖÃ²ÎÊý
	#define SDRAM_MODEREG_BURST_LENGTH_1             ((uint16_t)0x0000)
	#define SDRAM_MODEREG_BURST_LENGTH_2             ((uint16_t)0x0001)
	#define SDRAM_