有些项目,如pps-gen-gpio,提供了通过GPIO引脚生成PPS信号的功能,这在测试和模拟PPS信号时非常有用。 module_platform_driver pps_gpio_driver pps_gpio_probe pps_gpio_setup--根据dts配置获取GPIO pin、是否assert-falling-edge、echo、echo-active-ms等。 gpiod_to_irq--配置GPIO为中断。 pps_register_source ...
The PPS driver is registered.74960.216582] pps pps1: new PPS source pps.-1[74960.220861] pps pps1: Registered IRQ 356 as PPS sourceBut the CPU gets stalled and we do not catch interrupts. The interrupt is registered.cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 3: 42317212 37580614 40761246...
gpios = <&tegra_main_gpio TEGRA234_MAIN_GPIO(N, 2) GPIO_ACTIVE_LOW>; //assert-rising-edge; //assert-falling-edge; status = "okay"; }; 2.Separately compiled module driver pps-gpio.ko, manually loaded. -CONFIG_PPS_CLIENT_GPIO=y +CONFIG_PPS_CLIENT_GPIO=m 3.The oscilloscope measuremen...
We have tested the driver with kernel 4.14.20 on a Beaglebone Black where P9 pin 16 (GPIO1_19) is used as PPS output. The corresponding modified device tree file is here shown. Usage If you use a Beaglebone Black and want to change the PPS output pin, you have to modify your device...
The PPS driver is registered.74960.216582] pps pps1: new PPS source pps.-1[74960.220861] pps pps1: Registered IRQ 356 as PPS sourceBut the CPU gets stalled and we do not catch interrupts. The interrupt is registered.cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 3: 42317212 37580614 40761246...
In kernel 5.4 there is no support for using a GPIO pin as a PPS generator, only a GPIO PPS client is available. This driver is derived from the current parallel port PPS generator and provides a PPS signal through a GPIO pin specified in the device tree. The PPS signal is synchronized ...
The PPS driver is registered.74960.216582] pps pps1: new PPS source pps.-1[74960.220861] pps pps1: Registered IRQ 356 as PPS sourceBut the CPU gets stalled and we do not catch interrupts. The interrupt is registered.cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 3: 42317212 37580614 40761246...