如何通过SBR来配置GPIO,来实时显示PCIe Port的link状态。 PEX89144共有64个GPIO复用PIN,每个PIN都有如下复用功能: GPIO;I2C;SGPIO;SHPC_PERST#(热插拔复位控制);LinkUpLEDx(显示PCIe Port link状态);Tachin;PWM;CLKREQ# 这些复用功能都能灵活配置,比如热插拔复位控制的SHPC_PERST#,再比如今天学习的LinkUp功能,实...
1.1.3)编写约束文件 led、switch和button所用的引脚都需要约束。使用Run Automation的时候,Vivado会帮助完成约束,我们自主IP暂时未实现Run Automation功能,所以要手动约束。约束代码如下: #NET LD0 LOC = T22 | IOSTANDARD=LVCMOS33; # "LD0" set_property PACKAGE_PIN T22 [get_ports {zed_led[0]}] set_pro...
longgpio_led_ioctl(struct file *file, unsigned int cmd, unsigned long arg) switch (cmd) case RFID_LED: gpiod_direction_output(led_gpio[0],arg); break; case RFID_IO1: gpiod_direction_output(led_gpio[1],arg); break; case RFID_IO2: gpiod_direction_output(led_gpio[2],arg); break;...
/* Based on the required mode, filling config variable with MODEy[1:0] and CNFy[3:2] corresponding bits */switch(GPIO_Init->Mode){/* If we are configuring the pin in OUTPUT push-pull mode */caseGPIO_MODE_OUTPUT_PP:assert_param(...
(--i); i=250; } } //以下函数放在定时器中断内 SEG = 0XFF; switch(number) { case 0:SCAN4=1;SCAN3=0;SCAN2=0;SCAN1=0;SEG=distab[1];break; case 1:SCAN4=0;SCAN3=1;SCAN2=0;SCAN1=0;;SEG=distab[2];break; case 2:SCAN4=0;SCAN3=0;SCAN2=1;SCAN1=0;SEG=distab[3];...
(0); //得到键值 if(key) { switch(key) { case WKUP_PRES: //控制蜂鸣器 _beep_; //蜂鸣器翻转 break; case KEY1_PRES: //控制LED1翻转 _LED1_; //LED1翻转 break; case KEY0_PRES: //同时控制LED0,LED1翻转 _LED0_; //LED0翻转 _LED1_; //LED1翻转 break; } }else delay_ms(10)...
switch(key) { case KEY0_PRESS: LED1 = !LED1; break; case KEY1_PRESS: LED2 = !LED2; case WK_UP_PRESS: BEEP = !BEEP; break; } } else { delay_ms(10); } } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
switch@10 { label = "volume-down"; linux,code = <114>; gpios = <&gpio0 29 GPIO_ACTIVE_LOW>; gpio-key,wakeup; }; }; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 示例按键驱动,实现了多个dts配置的按键同时共享中断,中断的底板使用work...
{47key.flag.once_event =1;48key.flag.key_state =KEY_STATE_IDLE;49}50break;51default:52break;53}54}5556voidkey_scan(){57if(key.flag.once_event){58switch(key.event_current_type){59caseEVENT_KEYPRESS_SHORT:60result =SHORT_CLICK;61break;62caseEVENT_KEYPRESS_LONG:63result =LONG_CLICK;...
switch(gpio_irq_type) { case1: irqflags = IRQF_TRIGGER_RISING; break; case2: irqflags = IRQF_TRIGGER_FALLING; break; case3: irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; break; case4: irqflags = IRQF_TRIGGER_HIGH; break; ...