46 printf("ERROR: %s file open failed!\n", argv[1]); 47 return -1; 48 } 49 50 FD_ZERO(&readfds); 51 FD_SET(fd, &readfds); 52 53 /* 循环轮训读取按键数据 */ 54 for ( ; ; ) { 55 56 ret = select(fd + 1, &readfds, NULL, NULL, NULL); 57 switch ...
xil_printf("main(): f_mount(1:) failed with return code %d!\r\n",rc); return(-1); } /* Open a file */ if ((rc = f_open(&sImg,"0:test_1080p.bmp",FA_OPEN_EXISTING | FA_READ)) != FR_OK) { // <<< Fails!!! xil_printf("main(): f_...
res);return res;}return res;}static FRESULT sd_write_data(char *FileName, uint32_t SourceAddress, uint32_t ByteLength){FIL fil;FRESULT res;UINT bw;res = f_open(&fil, FileName, FA_CREATE_ALWAYS | FA_WRITE);if(res){kprintf("ERROR: %s f_open returned %d.\r\n", FileName, res)...
probe of 0-0051 failed with error -5 cdns-i2c e0004000.i2c: 400 kHz mmio e0004000 irq 141 EDAC MC: ECC not enabled Xilinx Zynq CpuIdle Driver started sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman sdhci-pltfm: SDHCI platform and OF driver helper ...
xil_printf("XAXIDMA_DMA_TO_DEVICE transfer failed... "); return XST_FAILURE; } cleanup_platform(); return 0; } 测试设备 为了验证模拟输出,将其通道 1 连接到示波器通道 1,并在主机 PC 上启动 WaveForms 来查看它。 然后,在 Vitis 中启动 C 应用程序的调试,并在 MM2S 传输开始之前设置了断点: ...
f_open(&fil, file_name, FA_CREATE_ALWAYS|FA_WRITE); //移动打开的文件对象的文件读/写指针 0:指向文件开头 f_lseek(&fil,0); //写入数据 f_write (&fil, (void*)src_addr,byte_len,&bw); //关闭文件 f_close(&fil); return 0;
f_open(&fil,file_name,FILE_NAME); //移动打开的文件对象的文件读/写指针 0:指向文件开头 f_lseek(&fil,0); //从SD卡中读出数据 f_read(&fil,(void*)src_addr,byte_len,&br); //关闭文件 f_close(&fil); return 0; } //SD卡写数据 ...
简介:串口( UART)是一种非常常见的外设, 串口在嵌入式开发领域当中一般作为一种调试手段,通过串口将调试信息打印出来,或者通过串口发送指令给主机端进行处理;当然除了作为基本的调试手段之外,还可以通过串口与其他设备或传感器进行通信, 譬如有些 sensor 就使用了串口通信的方式与主机端进行数据交互。
if((fd = open(/dev/mem, O_RDWR | O_SYNC)) == -1) { perror(open /dev/mem:); } //mmap map_base = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, base); if(map_base == MAP_FAILED) { perror(mmap:); } val = *(volaTIle uint32_t *)(map_base + pgof...
fd_ = open("/dev/udmabuf0", O_RDWR); if (fd_ < 0) { log_error("UdmaBuf mmap!"); assert(false); } user_ptr_ = mmap64(NULL, map_size_, PROT_READ | PROT_WRITE, MAP_SHARED, fd_, base_addr_); if(user_ptr_ != MAP_FAILED) { log_info("UdmaBuf mmap succuffully!"); Cl...