然后调用request_irq注册对应中断的中断处理函数,对于GPIO5_01是key_gpio5_handle_irq,中断处理函数里根据按键按下和松开分别在串口打印,并且按下时绿灯点亮,松开时绿灯熄灭,并且往ISR对应位写1清掉中断,否则会一直触发中断。对于KEY2,和KEY1类似,按下和松开只会在串口进行打印。 代码在裸机Git仓库 Noos...
line = gpiod_chip_get_line(chip, line_num); if (!line) { perror("Get line failed\n"); ret = -1; goto close_chip; } ret = gpiod_line_request_falling_edge_events(line, CONSUMER); if (ret < 0) { perror("Request event notification failed\n"); ret = -1; goto release_line;...
gpio_free(gc5025->det_pin); return IRQ_NONE; } ret = request_irq(camera_det_irq, camera_det_irq_handler, IRQ_TYPE_EDGE_BOTH, "det-gpio", NULL); if (ret != 0) { free_irq(camera_det_irq, NULL); dev_err(dev, "Failed to request IRQ: %d\n", ret); return ret; } } 1. ...
对于KEY1,将GPIO5_01通过EDGE_SEL设置成双边沿触发,通过IMR对应位设置为1打开中断,为了防止误触发将ISR对应位写1清除掉中断。然后调用request_irq注册对应中断的中断处理函数,对于GPIO5_01是key_gpio5_handle_irq,中断处理函数里根据按键按下和松开分别在串口打印,并且按下时绿灯点亮,松开时绿灯熄灭,并且往ISR对应...
gc->request= msm_pinctrl_request_gpio; 这里msm_pinctrl_request_gpio()会调pinctrl_request_gpio(); 同样地,对于pinctrl_free_gpio()、pinctrl_gpio_direction_input()和pinctrl_gpio_direction_output()也有类似说明。 因此在clientdevice驱动中,申请和释放gpio仍然要调gpio_request()、gpio_free();设置gpio为in...
gpio_get_value(gc5025->det_pin);/*判断注册终端*/if(camera_det_irq){ret = request_irq(camera_det_irq, camera_det_irq_handler, IRQ_TYPE_EDGE_BOTH, "det-gpio", NULL);if (ret != 0) {free_irq(camera_det_irq, NULL);dev_err(dev, "Failed to request IRQ: %d\n", ret);return ...
MODULE_LICENSE("GPL v2"); 红色的部分是另外一种注册GPIO结点的写法。 上面就是我加设备结点的全过程,建立完后会在/sys/devices/platform/gps-gpio.0/GPS_nRST、/sys/devices/platform/gps-gpio.0/GPS_PWR_EN 会有两个结点。 我们可以在adb shell中自由的控制电平的引脚。如 echo 1 > /sys/devices/platf...
To add GPU shader support you will need to install glesv2, gbm and mesagl. sudo apt-get install libgles2-mesa-dev libgbm-dev libegl1-mesa-dev support for single buffer shadertoy shaders is already added so just pass your shader via the -s command line parameter. This will set the path...
// 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; // '...
我现在用SPI写的读写DP AP函数1. linereset2. jtag转swd3. 读IDCODE(读正常，返回0x1BA01...