关于easyflash4.0的写入64位颗粒度，一直不能成功，是否接口函数转换不对还是说本身支持不了

发布于 2024-08-07 15:45:20 浏览：193 订阅该版

关于easyflash4.0的写入64位颗粒度，一直不能成功，是否接口函数转换不对还是说本身支持不了，
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240807/16a566a05ddbe94d410d03fec147b108.png)

```c
void internaFlashWrite(uint32_t ulStartAddr, uint8_t *pucData, uint16_t usLen)  
{  
    uint16_t i = 0;  
    uint64_t ullTemp = 0;  
    fmc_state_enum xFlashState = FMC_READY;

// Check alignment - Could return an error if not aligned  
//    if(ulStartAddr % 8 != 0)   
//    {  
//		EF_INFO("Address or data pointer not aligned");
//        return; // Address or data pointer not aligned  
//    }  
    
    fmc_unlock();

// Clear any previous errors, only needs to be done once  
    clearFmcFlags();

for(i = 0; i < usLen / 8; i++)   
    {  
        xFlashState = fmc_doubleword_program(ulStartAddr, *(uint64_t*)pucData);  //*(uint64_t*)  *(uint64_t*)pucData

if(xFlashState != FMC_READY)  
        {  
			fmc_lock();  
			EF_INFO("WRITE FMC NO READY");
            break; // Exit on error  
        }  
		
        pucData += 8;  
        ulStartAddr += 8;  
		clearFmcFlags();
    }

// Handle leftover bytes, use zero fill or any other logic as needed  
    if(usLen % 8)   
    {  
        ullTemp = 0; // Fill with zeros or other logic  
        for(uint8_t j = 0; j < usLen % 8; j++)   
        {  
            ullTemp |= ((uint64_t)pucData[j] << (8 * j)); // Adjust according to your needs  
        }  
		
        xFlashState = fmc_doubleword_program(ulStartAddr, ullTemp);  
    }

fmc_lock();  
}
```