output_value = gpiod_line_get_value(output_line); //测试拉高、拉低 gpiod_line_set_value(output_line, !output_value); //printf("output gpio[%d]: %d\t",i, !output_value); sleep(1); input_value = gpiod_line_get_value(input_line); //printf("input gpio[%d]: %d\n",i, input_...
gpiod_chip_close(chip); return -1 } rv = gpiod_line_request_input(line, “foobar”); //设置GPIO线路为输入或输出模式 if (rv) { gpiod_chip_close(chip); return -1; } value = gpiod_line_get_value(line); //设置GPIO线路的值:高电平/低电平(1/0) gpiod_chip_close(chip) //关闭芯...
你可以组合使用 gpiofind 以及gpioget/gpioset/gpiomon ,从而避免在脚本里硬编码 GPIO 信息: radxa@radxa-zero2:~$ gpioget $(gpiofind PIN_27)1编程参考C Python 使用前需要先安装相关头文件: sudo apt-get updatesudo apt-get install libgpiod-dev 示例代码 官方文档将vendor gpio 转换成 libgpiod...
radxa@radxa-zero2:~$ sudo gpioinfo gpiochip0 - 85 lines: line 0: "PIN_27" unused input active-high line 1: "PIN_28" unused input active-high line 2: "PIN_7" unused input active-high line 3: "PIN_11" unused input active-high line 4: "PIN_13" unused input active-high line ...
要操作GPIO引脚，先把所用引脚配置为GPIO功能，这通过Pinctrl子系统来实现。 然后就可以根据设置引脚方向...
chipname,offset,_:=gpiod.FindLine("LED A")c,_:=gpiod.NewChip(chipname,gpiod.WithConsumer("myapp"))l,_:=c.RequestLine(offset) Active Level The values used throughout the API for line values are the logical value, which is 0 for inactive and 1 for active. The physical level considere...
gpiofind - Find the GPIO chip name and line offset given the line name.gpiomon - Wait for events on GPIO lines, specifying which events to watch, how many events to process before exiting or if the events should be reported to the console. Here is some sample output taken from a ...
GPIOD_LINE_ACTIVE_STATE_HIGH); I connected one of the GPIO outputs on X5 on the dev board to one of the user LEDs (LED21) on X38. That worked fine. Then I changed the third argument to GPIOD_LINE_ACTIVE_STATE_LOW. And the LED still comes on ?!
// side note: on the Raspberry Pi the GPIO chip line offsets are the same numbers as the usual BCM GPIO numbering, which is convenient const int ledGpio = 15; // on the Pi3,4 you most likely want 0, on the Pi5 number 4, see 'gpioinfo' tool const int chipNumber = 0; // '...
E. g.: "gpioget $(gpiofind con1-11)" always finds the correct line to request the state of pin 11 of the connector. Of course only GPIO supported pins can be used, e. g. my device has way less pins capable of GPIO than the rock-pi. Therefore, con1-03 may be for rock-pi,...