usb_drvvbus: usb_drvvbus_pins { pinctrl-single,pins = < AM33XX_IOPAD(0xa1c, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* usb0_drvvbus.usb0_drvvbus */ AM33XX_IOPAD(0xa34, PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* usb1_drvvbus.usb1_drvvbus */ >; }; }; &usb { status = "okay"; ...
在uboot中,配置usb0和usb1都为host模式,实际测试只有usb1能够正常识别u盘,测量引脚电平发现USB0_DRVVBUS引脚输出低电平,而USB1_DRVVBUS能够正常输出高电平。因USB0_DRVVBUS为低导致无法给U盘设备上电。 usb phy已经配置上电,在uboot中读取usb0 usb1 phy电源配置寄存器如下: => md 0x44e10620 1 44e10620...
we make the USB port of AM3352 connect to USB1.1 hub IC(TUSB2046).The USB host work well if we don't plug out USB device.But when we make the usb device plug in/out several times, the USB_DRVVBUS Pin will be low.
In this case where this USB0_VBUS pin should be connected. Whether this has to be connected to power switch output or USB connector alone or both?? Regards, Saravanan.K Up0TrueDown In the case of a Host implementation, the USBn_DRVVBUS-controlled power switch output should be connected t...
Legacy DTs may still use drv-vbus DT property to configure ulpi-phy external supply to drive 5V on VBus. So to keep stable ABI also read drv-vbus property and configure vBus. Fixes: b3f1852 ("usb: phy: Add platform driver support for ULPI phys") Suggested-by: Michal Simek <michal.sime...
客戶的板子在進linux後插拔u盤發現USB2_DRVVBUS沒有反應 在軟硬體部分有哪些東西可以確認? 目前跑過chkusb.sh沒發現問題 output is as following: chkusb.sh Version 0.2.7 Linux buildroot 4.14.79 #7 SMP PREEMPT Tue Jun 30 17:33:46 CST 2020 armv7l GNU/Linux ...
USB 主机和器件安装在同一电路板上。 将TDA4VM 与 USB 主机配合使用。 不使用 USB 连接器。 我不打算使用 VBUS。 DRVVBUS 引脚未使用。 我想输入高于1.7V 的电压作为 USBx_VBUS 的自由引脚处理 (3.3V/PU 电阻器:4.7K/PD 电阻器:10K/VBUS 输入电压:2.24V) ...
I could change the hardware layout in order to cheat the driver: with a transistor I can send 5V to USB1_VBUS when the USB1_DRVVBUS is active; an I can use any other gpio to control from my program the TPS2051 switch to send power to the USB connector. I don´t know if this...
USB0..1_DRVVBUS has internal pull enabled on reset. Add a TP for future expansion. Rcalib resistor and VBUS divider resistor tolerance used should be 1% A CMC with provision to bypass the CMC through 0R is recommended in case USB compliance requirements exists. ...
We power on the DEVICE using a load switch controlled by PMIC LDO not by DRVBUS signal before start a USB session. We will attach theDEVICE"one time only" during the start up of our system. If detected some problem on system we will be allowed to restart using a power off/ p...