ioctl(fd, SPI_IOC_MESSAGE(1), xfer); // spi_ioc_transfer structure clock_gettime(CLOCK_MONOTONIC, &ts1); // Check time after The message I’m trying to send is 6 bytes, and the SPI clock rate is 5MHz. So this should take about 10 microseconds plus a little system call overhead....
由于我需要芯片选择线从高到低之间的消息-线ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);将无法工作,因为它把数据作为一个单一的消息。即使我将ioctl()放在for循环中,它也不能工作,因为它是第一条也是最后一条消息。 以下代码工作 代码语言:javascript 运行 AI代码解释 staticvoidtransfer(int fd){int ret;...
a = ioctl(spi_device, SPI_IOC_MESSAGE(1), &k); ioctl 读一个结构体 struct spi_ioc_transfer k; https://blog.csdn.net/liangxiaozhang/article/details/7601880
Hi, sometimes spi ioctl in imx6ul hangs indefinitely.ioctl(sSpiObj.spiFd, SPI_IOC_MESSAGE(1), &sSpiTransfer); What could be the reason, is the issue belongs to the driver or SPI config in dts file? Tags: imx6ul 0 Kudos Reply
问SPI传递函数中的ioctl错误返回-1 EINVALENioctl用于向设备发控制和配置命令，有些命令也需要读写一些...
然后,Windows 套接字 SPI 客户端可以通过调用 LPWSPEventSelect 或LPWSPAsyncSelect 来等待地址列表更改事件,并在网络事件位掩码中设置了FD_ADDRESS_LIST_CHANGE位。 SIO_ADDRESS_LIST_QUERY (操作码设置:O、T==1) 获取应用程序可以绑定到的套接字协议系列的本地传输地址列表。 地址列表因地址系列而异,某些地址...
SPI client may change the socket to blocking mode and reissue the request or wait for the corresponding network event (such as FD_ROUTING_INTERFACE_CHANGE or FD_ADDRESS_LIST_CHANGE in case of SIO_ROUTING_INTERFACE_CHANGE or SIO_ADDRESS_LIST_CHANGE) using Windows message based notification ...
(fd,SPI_IOC_MESSAGE(1),&tr);if(ret<1){printf("can't send spi message");}else{//printf("Send spi message OK %d\n",RxBuf[0]);}return1;}/** * 功能:关闭SPI模块 */intSPI_Close(void){intfd=g_SPI_Fd;if(fd==0)/* SPI是否已经打开*/return0;close(fd);g_SPI_Fd=0;return0;...
I’m trying to command a stepper motor controller through SPI, and I found that I could not send commands as quickly as I was expecting. After some profiling, I narrowed it down to this call: clock_gettime(CLOCK_MONOTONI…
每當SIO_ROUTING_INTERFACE_CHANGEIOCTL 通知 WinSock SPI 用戶端透過重迭 I/O 或發出FD_ROUTING_INTERFACE_CHANGE事件) 的訊號來 (變更路由變更時,應該重複整個動作順序。 如果輸出緩衝區不夠大而無法包含介面位址,SOCKET_ERROR會傳回此 IOCTL 的結果,而WSAGetLastError會傳回WSAEFAULT。 在此情況下,輸出緩衝區的必要...