axidma_set_callback(axidma_dev, rx_channel, dma_int_handler, (void*)&done); printf("Start Receive\n"); int ret = axidma_oneway_transfer(axidma_dev, rx_channel, rx_buf, BUFFER_SIZE, false); while (!done) { ; // axidma_stop_transfer(hdma, MYCHAN, enum axidma_dir dir); }...
=== axienet_stop() napi_disable() axienet_dma_stop() axienet_dma_err_handler() napi_disable() axienet_dma_stop() axienet_dma_start() napi_enable() cancel_work_sync() free_irq() Fix this by setting a flag in axienet_stop telling axienet_dma_err_handler not to bother doing anything....
行17,CMD_READ_DMA1获取摄像头1的画面数据。 8:中断函数 static void vdma_irq_handler(void *data) { int num = (int)data; //printk("%d\n", num); vdma_data->irq_reprot = 1; vdma_data->chanl |= (1 << num); wake_up_interruptible(&vdma_data->read_queue); ...
设置后,HDMI显示器会显示蓝屏。 root@vcu_llp2_xv20:~#modetest-Da00c0000.v_mix-s35:1920x1080-30@BG24settingmode1920x1080-30Hz@BG24onconnectors35,crtc33[ 254.364908]---[ cut here ]---[ 254.369527]driverforgottocalldrm_crtc_vblank_off()[ 254.374783]WARNING:CPU:2PID:2878atdrivers/gpu/drm/...
ARM端收到FPGA通过DMA发送到DDR中的数据后，组织数据以数据包的形式打包好发送出去。首先发送帧头，帧头有16字节即128bits数据，数据格式如下：帧头 128bits 特殊字符 特殊字符 采样率 精度 通道 符号位 采样长度 帧计数器 HEADER1 HEADER2 KSPS Resolution Channels Sign bit length frame counter 32bits 32bits...
Define PM_DEV_ADMA_5 Define PM_DEV_ADMA_6 Define PM_DEV_ADMA_7 Define PM_DEV_IPI_0 Define PM_DEV_IPI_1 Define PM_DEV_IPI_2 Define PM_DEV_IPI_3 Define PM_DEV_IPI_4 Define PM_DEV_IPI_5 Define PM_DEV_IPI_6 Define PM_DEV_SOC Define PM_DEV_DDRMC_0 Define...
For example, when the invalidation happens in a typical ISR (after a DMA transfer has updated the memory), then flushing the cache line means, losing data that were updated recently before the ISR got invoked. Linux prefers the second one. To have uniform implementation (across standalone and...
9、egister address (Hardware address)II Base register address LengthII Base register address (Virtual address, for I/O).II Name of driver in proc.II PCI device structure.II IRQ assigned by PCI system.II Pointer to Unaligned DMA buffer.II Pointer to dword aligned DMA buffer.II Pointer to ...
建议先ping一下本机的IP及网关
#defineHAVE_IRQ //I/OMemoryregion //Interupt #include#include#include//#include//#include#include/*copy_to_user*/ #include"xbmd.h"//semaphoresenum{ SEM_READ,SEM_WRITE,SEM_WRITEREG,SEM_READREG,SEM_WAITFOR,SEM_DMA,NUM_SEMS}; //semaphores structsemaphoregSem[NUM_SEMS]; MODULE_LICENSE("...