"gpio not allocated" 错误通常表示程序试图使用一个 GPIO 引脚,但是该引脚在系统中没有被正确分配或者初始化。以下是一些可能的原因和解决方法: GPIO资源已被其他进程占用: 确保没有其他进程或驱动程序正在使用你试图分配的 GPIO 引脚。 在Linux 系统中,可以使用 /sys/class/gpio 目录下的文件来查看和管理 GPIO ...
[ 1197.688323] genirq: Failed to request resources for wiegand-gpio (irq 236) on irqchip gpio-mxc[ 1197.697075] wiegand-gpio wiegand_port3: D0 IRQ 236 not allocatedcat: wiegand_port3: Input/output errorroot@falcon-4866:/dev#the related code is here:...
DEBUGMSG (1,(TEXT("v_pIOPRegs is not allocated "))); return TRUE; } if (!VirtualCopy((PVOID)v_pIOPRegs, (PVOID)IOP_BASE, sizeof(IOPreg), PAGE_READWRITE|PAGE_NOCACHE)) { DEBUGMSG (1,(TEXT("v_pIOPRegs is not mapped "))); return TRUE; } DEBUGMSG (1,(TEXT("v_pIOPRegs ...
1//配置RC3为输出,使用原NG的cc2538-dev的gpio.h文件实现。2//先查看一下,GPIO_C的DIR方向寄存器的内容,RC3xxxx 0xxx,是1就为输出3UARTprintf("RC3-DIR:%d\r\n",REG((GPIO_C_BASE) + GPIO_DIR)&0xff);45//将RC3 xxxx 0xxx方向寄存器设为16GPIO_SET_OUTPUT(GPIO_C_BASE, GPIO_PIN_MASK(3));...
* pointer references must be pre-allocated by the caller. Further * calls to manipulate the driver through the XGpio API must be * made with this pointer. * @param Config is a reference to a structure containing information * about a specific GPIO device. This function initializes an ...
{inti, ret, virq;/* 下面这个函数会从系统中一个唯一的virq,其实就是全局变量allocated_irqs从低位到高位第一个为0的位的位号. 然后将allocated_irqs的第virq位置为1, 然后会为这个virq分配一个irq_desc, virq会存放到irq_desc的irq_data.irq中. ...
The new character device interface guarantees all allocated resources are freed after closing the device file descriptor and adds several new features that are not present in the obsolete sysfs interface (like event polling, setting/reading multiple values at once or open-source and open-drain GPIOs...
A pointer to a caller-allocatedCLIENT_CONTROLLER_BASIC_INFORMATIONstructure. TheCLIENT_QueryControllerBasicInformationfunction writes the GPIO controller hardware attributes and configuration information into this structure. Return value TheCLIENT_QueryControllerBasicInformationfunction returns ...
7 @@ CONFIG_XR829_WLAN=m # CONFIG_SPARD_WLAN_SUPPORT is not set # CONFIG_BCMDHD is not set # CONFIG_AIC_WLAN_SUPPORT is not set +# CONFIG_RTL8723DS is not set # CONFIG_MAC80211_HWSIM is not set # CONFIG_USB_NET_RNDIS_WLAN is not set # CONFIG_VIRT_WIFI is not set diff --...
The new character device interface guarantees all allocated resources arefreed after closing the device file descriptor and adds several new featuresthat are not present in the obsolete sysfs interface (like event polling,setting/reading multiple values at once or open-source and open-drain GPIOs)....