when setting the state of lines these should contain57* the desired target state58*/59structgpiohandle_data {60unsignedcharvalues[GPIOHANDLES_MAX];61};6263#defineGPIO_GET_CHIPINFO_IOCTL 2151986177//_IOR(0xB4,
ioctl(4, GPIO_GET_CHIPINFO_IOCTL, 0xbeff6618) = 0 ioctl(4, GPIO_GET_LINEINFO_IOCTL, 0xbeff65cc) = 0 <snip> pdp7 added help wanted on Feb 5, 2018 Bartosz Golaszewski created libgpiod to make it easier to use the new kernel GPIO API: New GPIO interface for user space The repo...
/* get gpio chip info */ ret=ioctl(fd, GPIO_GET_CHIPINFO_IOCTL,&cinfo); if(ret<0) { printf("ERROR get chip info ret=%d\n", ret); return-1; } printf("GPIO chip: %s,\"%s\", %u GPIO lines\n", cinfo.name, cinfo.label, cinfo.lines); ret=ioctl(fd, GPIO_GET_LINEINFO_I...
(ioctl(gpio_fd, GPIOGETCHIPINFO, &chip_info) < 0) { perror("Failed to get chip info"); close(gpio_fd); return -1; } // 设置GPIO方向为输入 struct gpiohandle_request req; req.flags = GPIOHANDLE_REQUEST_OUTPUT; req.lineoffsets[0] = GPIO_PIN; req.default_values[0] = 0; // ...
Added lgGpioGetChipInfo method Added LG_OKAY constant V1.20 (9 July 2023) Updated lgGpioGetChipInfo information Added lgGpioGetLineInfo method Added lgLineInfo_p structure uses lgLineInfoFlags method Wrote lgLineInfoFlags method to return string from bits ...
然后,我们调用ioctl函数,传入GPIO_GET_LINEHANDLE_IOCTL命令和gpiohandle_request结构体。如果导出成功,ioctl函数将返回0,否则返回-1。 4.3. 设置GPIO方向和值 在导出GPIO之后,可以使用gpiohandle_data结构体来设置GPIO的方向和值。例如,要将GPIO8设置为输出并输出高电平,可以使用以下代码: ...
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intret=ioctl(Fd,GPIO_GET_CHIPINFO_IOCTL,&chipinfo); 1679+ if(0==ret) { 1680+ if(wiringPiDebug) { 1681+ printf("%s: name=%s, label=%s, lines=%u\n",szGPIOChip,chipinfo.name,chipinfo.label,chipinfo.lines) ; 1682+ } 1683+
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