首先,确定GPIO口的输入和输出,进而, 当GPIO处于output模式,一般选择no pull,引脚能够正确地输出目标值; 当GPIO处于input模式,需要根据默认的输入值来确定配置模式,如果默认输入的值为1时,最好配置为pull up,否则,最好配置为pull down; 当按照上面的规则进行配置之后,则能够避免外部电路没有上拉、下拉电阻时出现的...
1. 当GPIO处于output模式,⼀般选择no pull,引脚能够正确地输出⽬标值;2. 当GPIO处于input模式,需要根据默认的输⼊值来确定配置模式,如果默认输⼊的值为1时,最好配置为pull up,否则,最好配置为pull down;3. 当按照上⾯的规则进⾏配置之后,则能够避免外部电路没有上拉、下拉电阻时出现的不确定...
I have read chapter 24 from technical reference manual LS1043 ARDB, where I can not found any register to configure internal pull-up /pull-down for GPIO. So Just wanted to confirm that there is no option available to set internal pull-up/pull-down when we configure pin as GPIO. Request...
I have read chapter 24 from technical reference manual LS1043 ARDB, where I can not found any register to configure internal pull-up /pull-down for GPIO. So Just wanted to confirm that there is no option available to set internal pull-up/pull-down when we configure pin as GPIO. Re...
I have read that GPIO_34 - GPIO_39 have no pullup / pulldown resistors no matter if they are connected to RTC_MUX or IO_MUX. Is this true? Are pins RTC_6 - RTC_9 affected by 3.6 bug too? And if so, which register (XTAL_32 / TOUCH) should I use for RTC pins 8 (XTAL_32...
Re: GPIO internal pull-up and pull-down resistance value PostbyESP_Sprite»Thu Dec 15, 2022 1:23 am aanschariuswrote:↑ Tue Dec 13, 2022 3:21 pm 10K is waaayyy to low, if you have several pullup's downs, the drain from 3.3 or GND to all input becomes to high and the board...
AMD gpio pull 配置:一个总线上可以有很多设备,它们都是通过同一条总线进行沟通的。譬如要控制A开关,BCD在收到GPIO信号之后认出这不是发给自己的,就会自动忽略之后的指令,A接收这个指令,哦,这是发给我的,之后就会执行接收到的指令(如A是一个通过芯片控制的LED灯,控制芯片就会控制点亮或熄灭)...
3.3V GPIO uppull上拉5V易引发安卓系统重启,本文探讨笔者使用rk3128的GPIO引脚驱动mos管时,上拉电压至5V,系统出现重启等莫名问题。先把结论写下,将上拉限制在3.3V,系统正常工作。原因还未知,希望知道原因的小伙伴能留言说明下。led@4{pinctrl-names="default";pinctrl
GPIO口的internal pull-up问题 shizhong, 在上电复位时,默认除带ePWM功能的GPIO引脚外,其他的GPIO的上拉都是复位使能的,当然,可以在后续的软件中禁止它。这个内部上拉使能一方面会增强IO脚的驱动能力,一方面可以提供一个固定的状态给GPIO脚。 至于什么情况需要拉高,你可以把它想象成类似一个外部上拉电...
// GPIO_InitStruct.Pull = GPIO_NOPULL;//如果加上这句,会保留上次的状态。如果不加反而没事。 // } if(mode==0x6) { GPIO_InitStruct.Pull = GPIO_PULLUP; mode=0; } if(mode==0x7) { GPIO_InitStruct.Pull = GPIO_PULLDOWN; mode=0; } if (setpin & 0x01) { if(mode==0) { GPIO...