QueueHandle_txQueueCreate(UBaseType_t uxQueueLength,UBaseType_t uxItemSize);BaseType_txQueueSend(QueueHandle_t xQueue,constvoid*pvItemToQueue,TickType_t xTicksToWait);BaseType_txQueueReceive(QueueHandle_t xQueue
操作系统中队列是以项(item)为基本单元。 QueueHandle_t xQueueCreate( UBaseType_t uxQueueLength,UBaseType_t uxItemSize );BaseType_t xQueueSend( QueueHandle_t xQueue,const void * pvItemToQueue,TickType_t xTicksToWait );BaseType_t xQueueReceive( QueueHandle_t xQueue,void *pvBuffer,TickTy...
An ISR can only send a message to a queue; it cannot wait for a message. A message queue must be created before sending messages through it. Message queues are drawn as a first-in, first-out pipe (FIFO). However, some kernels allow messages to be sent in last-in, first-out order ...
void OSQPost(OS_Q*p_q,void*p_void,OS_MSG_SIZE msg_size,OS_OPT opt,RTOS_ERR*p_err) Arguments p_q Pointer to a message queue. p_void Pointer to the message to send. msg_size Specifies the size of the message (in bytes).
PURPOSE: A message queue communication method in an RTOS(Real Time Operating System) is provided to guarantee always the same performance regardless of the amount of data in a transmission rate. CONSTITUTION: A region of a message queue(100) to be used for communication is created. In this ...
BaseType_t xQueueReceive( QueueHandle_t xQueue, void *pvBuffer, TickType_t xTicksToWait ); 1. 2. 3. 4. 5. 6. 7. 8. 从其创建函数中传参可以看出,对列需要一个固定的长度,并且每个项的大小也是固定的。从发送和接收函数中可以看出,其默认传递的方式为拷贝,将指针指向的内容拷贝到自己的内存中...
if(twai_transmit(&message, pdMS_TO_TICKS(3000)) == ESP_OK) {printf("Message queued for transmission\n"); }else{printf("Failed to queue message for transmission\n"); i used last time 3000 instead of the 1000 that was the default ...
I went a bit CHERI happy with the message queue endpoint code and it has a load of 8-byte pointers to 4-byte fields. These don't really provide any security value and are unnecessary now that the sealing APIs let you create sealed objects of any size....
运行rtos5.2的examples/DRA7XX_linux_elf/ex02_messageq例子测试IPC通信机制, 发现app_host调用 MessageQ_Open(msggName,..)返回 -5,继续查看dsp端的server.c代码 ,发现MessageQ_create(msggName,&msgqParams),其中msgqParams.queueIndex = 65535 。
运行rtos5.2的examples/DRA7XX_linux_elf/ex02_messageq例子测试IPC通信机制, 发现app_host调用 MessageQ_Open(msggName,..)返回 -5,继续查看dsp端的server.c代码 ,发现MessageQ_create(msggName,&msgqParams),其中msgqParams.queueIndex = 65535 。