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...
status = "okay"; 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 { ...
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.simek@amd.com> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com> State: pending...
status = "okay"; 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 { ...
In the case of a Host implementation, the USBn_DRVVBUS-controlled power switch output should be connected to both the USB connector and the USBn_VBUS pin. Up0TrueDown TI__Expert Hi all, In the case that the AM335x USB controller is always in host mode and the peripheral IC is powere...
drvvbus这个脚和bb相连 应该不是供电 供电应该是直接从快充输出vbus 不会和bb相连 有谁知道的吗？
0 members are here This thread has been locked. If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question. USB host without DRVVBUS ...
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am335x usb 问题 DRVVBUS 一直是低 Other Parts Discussed in Thread:AM3352,TPS65217,PCM1690 我用的是bbb板子,基于最新sdk,我这边需要使用usb0和usb1为主机模式。然后我也按照ti的usb内核配置做了从新编译,但是DRVVBUS一直输出0。请问一下我是哪儿做错了吗?谢谢各位了。
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) 你有任何疑虑吗? 感谢你的帮助 2 年多前 添加回复...