STM32F103 when powered from USB - not seen as Virtual COM Port
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2017-07-13 10:58 PM
I am trying to use F103c8t6 with USB in virtual COM port mode, using CubeMX tools. If the device is powered from an external source before USB connecting - when connect USB cable it is recognized by Windows normally. But when I try to power it from USB only, it is seen as an unknown device when connect USB cable. Code has been generated with 'SELF_POWERED' option in CubeMX switched off.
#usb #virtual-comport-stm32- Labels:
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USB
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2017-07-13 11:33 PM
Hello ... Try to establish a few ms delay after power on to stabilize power and after give the 'MX_USB_DEVICE_Init();'
You can check if usb is configured 'if(hyourusbdevice.dev_state == USBD_STATE_CONFIGURED)... ' after initialization and / or wait.
