内核中源码是这样的#define container_of(ptr, type, member) ({\ const typeof( ((type *)0)->member ) *__mptr
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2020-11-05 07:16
。(大多数)关键字后要加一个空格。值得注意的例外是sizeof、typeof、alignof和__attribute__,这些关键字在一定程度上看起来更像函数(它们在Linux里也常常伴随小括号使用,尽管在C
2019-05-10 05:39
大家好。在我的项目中,我使用EZBL(简单Bootloader V2.04)进行应用程序更新。在文档文件中说明EZBL库还实现了EEPROM仿真机制。我已经尝试过文档中的例子,它工作得很好,但是当更多的参数被添加到结构中时,只有第一个参数被写入Flash。下面是我使用的代码:在执行EZBLLWORKELDROM ObjutoScript之后,仅在Flash中保存了参数RealDestBulink,另一个值是0xFFFF。此外,在EZBL文档中,EEPROM仿真模块可以处理具有多个参数的结构。您知道为什么会发生这种情况吗? 以上来自于百度翻译 以下为原文 Hi Everyone.In my project I'm using the EZBL (Easy bootloader v2.04) for application update. In documentation files is stated that ezbl library has also the EEPROM emulation mechanism implemented. I've tried the example from documentation and it works fine, but when more parameters are added to the structure, only the first one is written in FLASH. Here is the code I'm using:#include #include "ezbl_integration/ezbl.h"EZBL_AllocFlashHole(emuEEData, 3072, 0x800, -1);struct{ unsigned int ledsToBlink; unsigned int test;} eeVars;int main(void){ EZBL_ReadROMObj(&eeVars, EZBL_FlashHoleAddr(emuEEData)); eeVars.ledsToBlink=1; eeVars.test=0; EZBL_WriteROMObj(EZBL_FlashHoleAddr(emuEEData), &eeVars); while(1) {Idle(); }} After the execution of EZBL_WriteROMObj funciton, only the parameter ledsToBlink is saved in FLASH, the other value is 0xFFFF. Also, in EZBL docs is stated that EEPROM emulation module can handle structures with multiple parameters.Do you have any idea why is this happening?
2018-10-08 15:55
在之前只知道SqlServer支持数据批量插入,殊不知道Oracle、SQLite和MySql也是支持的,不过Oracle需要使用Orace.DataAccess驱动,今天就贴出几种数据库的批量插入解决方法。
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uart_ll_is_tx_idle(uart_dev_t *hw){ typeof(hw->status) status = hw->status; return ((status.txfifo_cnt
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static inline bool uart_ll_is_tx_idle(uart_dev_t *hw){ typeof(hw->status) status
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