要用到Bootloader升级,APP部分要写运行日志。所以在Bootloader部分的FATFS要做裁剪,裁剪到只剩只读的操作就可以了,而APP端做可读可写。
用的是野火的STM32F103VETx指南者
STM32CubeMx 和 Keil5
我用的是4线 Bit的配置,时钟尽量不要太高,我这里用了36分频,最终具体的频率要自己算一下。
然后配置FATFS,User-defined我建议是选上,对初学者的一次成功概率要更高一点。
要使能第二行的FS_READONLY的话,要让最后一行的FS_LOCK设置成0才能看到选项(这个是设置成只读的配置,其他的写啥的f_write,基本都不能用,为了省空间)
第二、三行我就不做解释,后面我会放个链接,你们可以看看大概是做什么的。
从CODE_PAGE开始,按照顺序,设置英文、使能栈的缓存,最大的LFN为64(默认是255,如果跟我一样设置为64,那么SD里面的文件名超过64字的长度的话,可能会出现f_open失败的情况,请按照个人情况设置)
这两个链接里面有涉及到FATFS的裁剪部分的说明,其实占空间最大的是这个选项,如果你选择了兼容汉字的话,我编译出来是190K左右,基本玩不了的。
还有一些其他的配置,基本都懂的
最后的栈空间最好设置大一下,保证SDIO不会溢出
最后附上代码,有点长。如果你的CubeMx的设置跟我一样的话,可以直接复制。记得要勾上微库选项,以及printf的重定向。
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2021 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Ultimate Liberty license
* SLA0044, the "License"; You may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* www.st.com/SLA0044
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "fatfs.h"
#include "sdio.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
FATFS fs; /* FatFs文件系统对象 */
FIL file; /* 文件对象 */
FRESULT f_res; /* 文件操作结果 */
UINT fnum; /* 文件成功读写数量 */
BYTE ReadBuffer[1024]={0}; /* 读缓冲区 */
BYTE WriteBuffer[]= "Welcome to the wildfire STM32 development board. Today is a good day to create new file system test files\r\n";
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
#define DBGPRINTF printf
/**
* @brief 打印输出信息
* @param 无
* @retval 无
*/
void printf_fatfs_error(FRESULT fresult)
{
switch(fresult)
{
case FR_OK:
DBGPRINTF("!!The operation was successful.\r\n");
break;
case FR_DISK_ERR:
DBGPRINTF("!!Hardware I / O driver error.\r\n");
break;
case FR_INT_ERR:
DBGPRINTF("!!Assertion error.\r\n");
break;
case FR_NOT_READY:
DBGPRINTF("!!The physical device is not working.\r\n");
break;
case FR_NO_FILE:
DBGPRINTF("!!Unable to find file.\r\n");
break;
case FR_NO_PATH:
DBGPRINTF("!!The path could not be found.\r\n");
break;
case FR_INVALID_NAME:
DBGPRINTF("!!Invalid pathname.\r\n");
break;
case FR_DENIED:
case FR_EXIST:
DBGPRINTF("!!Access denied.\r\n");
break;
case FR_INVALID_OBJECT:
DBGPRINTF("!!Invalid file or path.\r\n");
break;
case FR_WRITE_PROTECTED:
DBGPRINTF("!!Logical device write protection.\r\n");
break;
case FR_INVALID_DRIVE:
DBGPRINTF("!!Invalid logical device.\r\n");
break;
case FR_NOT_ENABLED:
DBGPRINTF("!!Invalid workspace.\r\n");
break;
case FR_NO_FILESYSTEM:
DBGPRINTF("!!Invalid file system.\r\n");
break;
case FR_MKFS_ABORTED:
DBGPRINTF("!!Fmkfs function operation failed due to function parameter problem.\r\n");
break;
case FR_TIMEOUT:
DBGPRINTF("!!The operation timed out.\r\n");
break;
case FR_LOCKED:
DBGPRINTF("!!The file is protected.\r\n");
break;
case FR_NOT_ENOUGH_CORE:
DBGPRINTF("!!Long file name support failed to get heap space.\r\n");
break;
case FR_TOO_MANY_OPEN_FILES:
DBGPRINTF("!!Too many files open.\r\n");
break;
case FR_INVALID_PARAMETER:
DBGPRINTF("!!Invalid parameter.\r\n");
break;
}
}
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SDIO_SD_Init();
MX_USART1_UART_Init();
MX_FATFS_Init();
/* USER CODE BEGIN 2 */
DBGPRINTF("\r\r\n****** This is a SD card file system experiment ******\r\n");
// 注册一个FatFS设备:SD卡 //
if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
{
//在SD卡挂载文件系统,文件系统挂载时会对SD卡初始化
f_res = f_mount(&fs,(TCHAR const*)SDPath,1);
printf_fatfs_error(f_res);
//----------------------- 格式化测试 ---------------------------//
// 如果没有文件系统就格式化创建创建文件系统 */
if(f_res!=FR_OK)
{
DBGPRINTF("The SD card failed to mount the file system.(%d)\r\n",f_res);
printf_fatfs_error(f_res);
while(1);
}
else
{
DBGPRINTF("The file system is mounted successfully and can be read and written\r\n");
}
//------------------- 文件系统测试:读测试 ------------------------------------//
DBGPRINTF("****** File read test is about to take place... ******\r\n");
f_res = f_open(&file, "FatFsRWFiles.txt", FA_OPEN_EXISTING | FA_READ);
printf_fatfs_error(f_res);
if(f_res == FR_OK)
{
DBGPRINTF("File opened successfully.\r\n");
f_res = f_read(&file, ReadBuffer, sizeof(ReadBuffer), &fnum);
if(f_res==FR_OK)
{
DBGPRINTF("File read successfully, read byte data: %d\r\n",fnum);
DBGPRINTF("The obtained file data are as follows:\r\n%s \r\n", ReadBuffer);
}
else
{
DBGPRINTF("File read failure:(%d)\r\n",f_res);
}
}
else
{
DBGPRINTF("Failed to open file.\r\n");
}
// 不再读写,关闭文件 //
f_close(&file);
// 不再使用,取消挂载 //
f_res = f_mount(NULL,(TCHAR const*)SDPath,1);
}
// 注销一个FatFS设备:SD卡 //
FATFS_UnLinkDriver(SDPath);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
如果没有玩过linux/windows开发的话,这里可以更改你想读SD里面的哪个文件。当然前提是,你SD里面有这个文件才行。
需要注意的是,里面的并非是字符,而是十六进制,可以看到最后的0d 0a 00是不是很熟悉,不就是\r\n吗。
在上面的基础上,只需要更改FATFS部分的配置即可。
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2021 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Ultimate Liberty license
* SLA0044, the "License"; You may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* www.st.com/SLA0044
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "fatfs.h"
#include "sdio.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
FATFS fs; /* FatFs文件系统对象 */
FIL file; /* 文件对象 */
FRESULT f_res; /* 文件操作结果 */
UINT fnum; /* 文件成功读写数量 */
BYTE ReadBuffer[1024]={0}; /* 读缓冲区 */
BYTE WriteBuffer[]= "Welcome to the wildfire STM32 development board. Today is a good day to create new file system test files\r\n";
#define DBGPRINTF printf
void printf_fatfs_error(FRESULT fresult)
{
switch(fresult)
{
case FR_OK:
DBGPRINTF("!!The operation was successful.\r\n");
break;
case FR_DISK_ERR:
DBGPRINTF("!!Hardware I / O driver error.\r\n");
break;
case FR_INT_ERR:
DBGPRINTF("!!Assertion error.\r\n");
break;
case FR_NOT_READY:
DBGPRINTF("!!The physical device is not working.\r\n");
break;
case FR_NO_FILE:
DBGPRINTF("!!Unable to find file.\r\n");
break;
case FR_NO_PATH:
DBGPRINTF("!!The path could not be found.\r\n");
break;
case FR_INVALID_NAME:
DBGPRINTF("!!Invalid pathname.\r\n");
break;
case FR_DENIED:
case FR_EXIST:
DBGPRINTF("!!Access denied.\r\n");
break;
case FR_INVALID_OBJECT:
DBGPRINTF("!!Invalid file or path.\r\n");
break;
case FR_WRITE_PROTECTED:
DBGPRINTF("!!Logical device write protection.\r\n");
break;
case FR_INVALID_DRIVE:
DBGPRINTF("!!Invalid logical device.\r\n");
break;
case FR_NOT_ENABLED:
DBGPRINTF("!!Invalid workspace.\r\n");
break;
case FR_NO_FILESYSTEM:
DBGPRINTF("!!Invalid file system.\r\n");
break;
case FR_MKFS_ABORTED:
DBGPRINTF("!!Fmkfs function operation failed due to function parameter problem.\r\n");
break;
case FR_TIMEOUT:
DBGPRINTF("!!The operation timed out.\r\n");
break;
case FR_LOCKED:
DBGPRINTF("!!The file is protected.\r\n");
break;
case FR_NOT_ENOUGH_CORE:
DBGPRINTF("!!Long file name support failed to get heap space.\r\n");
break;
case FR_TOO_MANY_OPEN_FILES:
DBGPRINTF("!!Too many files open.\r\n");
break;
case FR_INVALID_PARAMETER:
DBGPRINTF("!!Invalid parameter.\r\n");
break;
}
}
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SDIO_SD_Init();
MX_USART1_UART_Init();
MX_FATFS_Init();
/* USER CODE BEGIN 2 */
DBGPRINTF("\r\r\n****** This is a SD card file system experiment ******\r\n");
// 注册一个FatFS设备:SD卡 //
if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
{
//在SD卡挂载文件系统,文件系统挂载时会对SD卡初始化
f_res = f_mount(&fs,(TCHAR const*)SDPath,1);
printf_fatfs_error(f_res);
//----------------------- 格式化测试 ---------------------------//
// 如果没有文件系统就格式化创建创建文件系统 */
if(f_res == FR_NO_FILESYSTEM)
{
DBGPRINTF("The SD card does not have a file system yet and will be formatted...\r\n");
// 格式化 //
f_res=f_mkfs((TCHAR const*)SDPath,0,0);
if(f_res == FR_OK)
{
DBGPRINTF("The SD card has successfully formatted the file system\r\n");
// 格式化后,先取消挂载 //
f_res = f_mount(NULL,(TCHAR const*)SDPath,1);
// 重新挂载 //
f_res = f_mount(&fs,(TCHAR const*)SDPath,1);
}
else
{
DBGPRINTF("Format failed\r\n");
while(1);
}
}
else if(f_res!=FR_OK)
{
DBGPRINTF("The SD card failed to mount the file system.(%d)\r\n",f_res);
printf_fatfs_error(f_res);
while(1);
}
else
{
DBGPRINTF("The file system is mounted successfully and can be read and written\r\n");
}
//----------------------- 文件系统测试:写测试 -----------------------------//
// 打开文件,如果文件不存在则创建它 //
DBGPRINTF("****** A file write test will be performed... ******\r\n");
f_res = f_open(&file, "unit_sd_rw_test.txt",FA_CREATE_ALWAYS | FA_WRITE );
if ( f_res == FR_OK )
{
DBGPRINTF("Open / create FatFs read / write test file. TXT file successfully, write data to the file.\r\n");
// 将指定存储区内容写入到文件内 //
f_res=f_write(&file,WriteBuffer,sizeof(WriteBuffer),&fnum);
if(f_res==FR_OK)
{
DBGPRINTF("File write success, write byte data:%d\r\n",fnum);
DBGPRINTF("The data written to the file is: \r\n%s\r\n",WriteBuffer);
}
else
{
DBGPRINTF(" File write failure:(%d)\r\n",f_res);
}
// 不再读写,关闭文件 //
f_close(&file);
}
else
{
DBGPRINTF("Failed to open / create file.\r\n");
}
//------------------- 文件系统测试:读测试 ------------------------------------//
DBGPRINTF("****** File read test is about to take place... ******\r\n");
f_res = f_open(&file, "unit_sd_rw_test.txt", FA_OPEN_EXISTING | FA_READ);
if(f_res == FR_OK)
{
DBGPRINTF("File opened successfully.\r\n");
f_res = f_read(&file, ReadBuffer, sizeof(ReadBuffer), &fnum);
if(f_res==FR_OK)
{
DBGPRINTF("File read successfully, read byte data: %d\r\n",fnum);
DBGPRINTF("The obtained file data are as follows:\r\n%s \r\n", ReadBuffer);
}
else
{
DBGPRINTF("File read failure:(%d)\r\n",f_res);
}
}
else
{
DBGPRINTF("Failed to open file.\r\n");
}
// 不再读写,关闭文件 //
f_close(&file);
// 不再使用,取消挂载 //
f_res = f_mount(NULL,(TCHAR const*)SDPath,1);
}
// 注销一个FatFS设备:SD卡 //
FATFS_UnLinkDriver(SDPath);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
只要你没有去选择兼容汉字的选项,基本上这个文件系统不会太大。只读和可读可写,在占用空间上相差并不会太大,但MCU上的空间是金子呀【笑哭】。FATFS的选项可能有点选的不太合适,发现的可以在评论区补充一下,
就介绍到这里了!!!有问题可以私聊或在评论区留言
文章浏览阅读1.6k次。安装配置gi、安装数据库软件、dbca建库见下:http://blog.csdn.net/kadwf123/article/details/784299611、检查集群节点及状态:[root@rac2 ~]# olsnodes -srac1 Activerac2 Activerac3 Activerac4 Active[root@rac2 ~]_12c查看crs状态
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文章浏览阅读5.2k次,点赞19次,收藏28次。选择scoop纯属意外,也是无奈,因为电脑用户被锁了管理员权限,所有exe安装程序都无法安装,只可以用绿色软件,最后被我发现scoop,省去了到处下载XXX绿色版的烦恼,当然scoop里需要管理员权限的软件也跟我无缘了(譬如everything)。推荐添加dorado这个bucket镜像,里面很多中文软件,但是部分国外的软件下载地址在github,可能无法下载。以上两个是官方bucket的国内镜像,所有软件建议优先从这里下载。上面可以看到很多bucket以及软件数。如果官网登陆不了可以试一下以下方式。_scoop-cn
文章浏览阅读4.5k次,点赞2次,收藏3次。首先要有一个color-picker组件 <el-color-picker v-model="headcolor"></el-color-picker>在data里面data() { return {headcolor: ’ #278add ’ //这里可以选择一个默认的颜色} }然后在你想要改变颜色的地方用v-bind绑定就好了,例如:这里的:sty..._vue el-color-picker
文章浏览阅读640次。基于芯片日益增长的问题,所以内核开发者们引入了新的方法,就是在内核中只保留函数,而数据则不包含,由用户(应用程序员)自己把数据按照规定的格式编写,并放在约定的地方,为了不占用过多的内存,还要求数据以根精简的方式编写。boot启动时,传参给内核,告诉内核设备树文件和kernel的位置,内核启动时根据地址去找到设备树文件,再利用专用的编译器去反编译dtb文件,将dtb还原成数据结构,以供驱动的函数去调用。firmware是三星的一个固件的设备信息,因为找不到固件,所以内核启动不成功。_exynos 4412 刷机
文章浏览阅读2w次,点赞24次,收藏42次。Linux系统配置jdkLinux学习教程,Linux入门教程(超详细)_linux配置jdk
文章浏览阅读3.3k次,点赞5次,收藏19次。xlabel('\delta');ylabel('AUC');具体符号的对照表参照下图:_matlab微米怎么输入
文章浏览阅读119次。顺序读写指的是按照文件中数据的顺序进行读取或写入。对于文本文件,可以使用fgets、fputs、fscanf、fprintf等函数进行顺序读写。在C语言中,对文件的操作通常涉及文件的打开、读写以及关闭。文件的打开使用fopen函数,而关闭则使用fclose函数。在C语言中,可以使用fread和fwrite函数进行二进制读写。 Biaoge 于2024-03-09 23:51发布 阅读量:7 ️文章类型:【 C语言程序设计 】在C语言中,用于打开文件的函数是____,用于关闭文件的函数是____。
文章浏览阅读3.4k次,点赞2次,收藏13次。跟随鼠标移动的粒子以grid(SOP)为partical(SOP)的资源模板,调整后连接【Geo组合+point spirit(MAT)】,在连接【feedback组合】适当调整。影响粒子动态的节点【metaball(SOP)+force(SOP)】添加mouse in(CHOP)鼠标位置到metaball的坐标,实现鼠标影响。..._touchdesigner怎么让一个模型跟着鼠标移动
文章浏览阅读178次。项目运行环境配置:Jdk1.8 + Tomcat7.0 + Mysql + HBuilderX(Webstorm也行)+ Eclispe(IntelliJ IDEA,Eclispe,MyEclispe,Sts都支持)。项目技术:Springboot + mybatis + Maven +mysql5.7或8.0+html+css+js等等组成,B/S模式 + Maven管理等等。环境需要1.运行环境:最好是java jdk 1.8,我们在这个平台上运行的。其他版本理论上也可以。_基于java技术的停车场管理系统实现与设计
文章浏览阅读3.5k次。前言对于MediaPlayer播放器的源码分析内容相对来说比较多,会从Java-&amp;gt;Jni-&amp;gt;C/C++慢慢分析,后面会慢慢更新。另外,博客只作为自己学习记录的一种方式,对于其他的不过多的评论。MediaPlayerDemopublic class MainActivity extends AppCompatActivity implements SurfaceHolder.Cal..._android多媒体播放源码分析 时序图
文章浏览阅读2.4k次,点赞41次,收藏13次。java 数据结构与算法 ——快速排序法_快速排序法