Keep in mind this is a fairly simple example. Hardware interrupts can also be used to preempt running tasks. An RTOS allows you to create software jobs instead of relying on hardware interrupts and assign them priorities. Additionally, most RTOSes can also act as an abstraction lay...
在项目中LwIP与FreeRTOS和LAN8720以太网之间的文件关系如下: a、FreeRTOS与LwIP协议栈之间主要通过sys_arch.c和sys_arch.h文件连接起来的,这两个文件中主要实现了对FreeRTOS的API封装。其中sys_arch.c中实现的函数在sys.h头文件中全部给声明好了,我们只需实现出来即可。 b、LAN8720以太网卡和LwIP协议栈之间主要通...
tc-iot-at-sdk-stm32-freertos-based-example 面向使用支持腾讯AT指令的模组(2/3/4/5G、NB、WIFI等)接入腾讯物联网平台的终端设备开发者,mcu侧使用[腾讯AT_SDK]的移植示例,示例基于STM32F103 MCU和FreeRTOS的软硬件环境如何实现HAL层的移植。 - ArthurXu424/tc-iot-at-sdk
We know that the I2C is a synchronous communication, so both the master and slave should be doing the same thing at the same time. For example, if the slave is sending the 4th bit of the data, then the master should also be looking for the 4th bit of the data. ...
#ifdef USE_RTOS static void mutex_lock(void){ } static void mutex_unlock(void){ } #endif sta...
FreeRTOS通过复制方法使用队列。复制队列被认为比引用队列更强大和更容易使用,因为: Stack变量可以直接发送到队列,即使该变量在声明它的函数退出后将不存在。 可以将数据发送到队列,而不需要首先分配一个缓冲区来保存数据,然后将数据复制到已分配的缓冲区中 发送任务可以立即重用已发送到队列的变量或缓冲区。 发送任务...
vQueueUnregisterQueue – vSemaphoreCreateBinary – vSemaphoreCreateCounting – xSemaphoreCreateMutex – xSemaphoreTake – xSemaphoreGive – xSemaphoreGiveFromISR 1.6 FreeRTOS™ memory management Four sample RAM allocation schemes are included in the FreeRTOS™ source code download (V2.5.0 onwards). ...
xSemaphoreHandle xSemaphoreCreateMutex( void ); 互斥量的取得: xSemaphoreTake( xMutex, portMAX_DELAY ); 互斥量的归还: xSemaphoreGive( xMutex ); 运行时的栈侦测等最后会完善。 FreeRTOS的软时钟与任务延时阻塞: 用硬件定时器有时候并不是很方便,因为得写中断,得分配信号量;而且这类开支会让定时也不能...
your code here */ printf("%.*s", size, log); } /** * output lock */ void elog_port_output_lock(void) { /* add your code here */ if( NULL != LogMutexSemaphore) { /* 获取日志互斥 */ xSemaphoreTakeLogMutexSemaphore,portMAX_DELAY)...
xSemaphoreHandle xSemaphoreCreateMutex( void ); 互斥量的取得: xSemaphoreTake( xMutex, portMAX_DELAY ); 互斥量的归还: xSemaphoreGive( xMutex ); 运行时的栈侦测等最后会完善。 FreeRTOS的软时钟与任务延时阻塞: 用硬件定时器有时候并不是很方便,因为得写中断,得分配信号量;而且这类开支会让定时也不能...