rockchip,drive = <VALUE_DRV_DEFAULT>; //rockchip,tristate = <VALUE_TRI_DEFAULT>; }; i2c4_gpio: i2c4-gpio { rockchip,pins = <FUNC_TO_GPIO(I2C4TP_SDA)>, <FUNC_TO_GPIO(I2C4TP_SCL)>; rockchip,drive = <VALUE_DRV_DEFAULT>; }; }; ... } } I2C4TP_SDA, I2C4TP_SCL 的定义...
#include <ms_rtos.h> #include <string.h> #include <driver/ms_drv_gpio.h> #include "test/include/greatest.h" #define GPIO_A00_DEV_FILE "/dev/gpio_a0" #define LED0_GPIO_DEV_FILE "/dev/gpio_b1" #define LED1_GPIO_DEV_FILE "/dev/gpio_b0" #define KEY0_GPIO_DEV_FILE "/dev/gpi...
bflb_gpio_init(gpio, GPIO_PIN_1, GPIO_INPUT | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_0); //gpio初始化,第一个参数为句柄,第二个参数为pin,第三个为GPIO的配置,这里配置为输入、浮空、滤波打开、驱动等级0 while (1) { bflb_gpio_set(gpio, GPIO_PIN_0);//将pin0设置为高电平 printf("\...
93/* 4.2 注册file_operations */94major=register_chrdev(0,"100ask_led",&led_drv);/* /dev/led */9596led_class=class_create(THIS_MODULE,"100ask_led_class");97if(IS_ERR(led_class)){98printk("%s %s line %d\n",__FILE__,__FUNCTION__,__LINE__);99unregister_chrdev(major,"led");...
如果是配成了输入引脚,GPIOx_PSR:读取引脚的电平,每位对应一个引脚,1-高电平,0-低电平: 3 字符设备驱动程序框架 字符驱动编写流程: /* 1. 确定主设备号,也可以让内核动态分配. 2. 定义自己的 file_operations 结构体 实现对应的 drv_open/drv_read/drv_write 等函数 ...
}/* gpio-mxc can be a generic irq chip */err = mxc_gpio_init_gc(port, irq_base, &pdev->dev);if(err <0)gotoout_irqdomain_remove; list_add_tail(&port->node, &mxc_gpio_ports); platform_set_drvdata(pdev, port); pm_runtime_put(&pdev->dev);return0; ...
#define GPIO_DRV_2 (2 << GPIO_DRV_SHIFT)#define GPIO_DRV_3 (3 << GPIO_DRV_SHIFT) 6.gpio init trig mode gpio 外部中断的触发模式 #define GPIO_INT_TRIG_MODE_SYNC_FALLING_EDGE 0#define GPIO_INT_TRIG_MODE_SYNC_RISING_EDGE 1#define GPIO_INT_TRIG_MODE_SYNC_LOW_LEVEL 2#define GPIO_...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* mach/gpio-bank.h */ #define S5PV210_GPA0CON (S5PV210_GPA0_BASE + 0x00) #define S5PV210_GPA0DAT (S5PV210_GPA0_BASE + 0x04) #define S5PV210_GPA0PUD (S5PV210_GPA0_BASE + 0x08) #define S5PV210_GPA0DRV (S5PV210_GPA0_BASE + 0x...
voidDrv_Gpio_Init(void){GPIO_InitTypeDefGPIO_InitStructure;// 定义结构体// 开启时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);// 配置结构体GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_8;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_...