Eu tentei usar minicom, Putty, screen e cKermit sem sucesso. Parece que a conexão é intermitente da saída de dmesg | grep tty .
[1627865.078080] usb 5-2: Product: AM335x USB
[1627865.078086] usb 5-2: Manufacturer: Texas Instruments
[1627865.152124] rndis_host 5-2:1.0: usb0: register 'rndis_host' at usb-0000:00:13.0-2, RNDIS device, 9a:1f:85:1c:3d:0e
[1627865.398299] userif-2: sent link down event.
[1627865.398309] userif-2: sent link up event.<6>[1627905.546191] usb 5-2: USB disconnect, device number 41
[1627905.547204] rndis_host 5-2:1.0: usb0: unregister 'rndis_host' usb-0000:00:13.0-2, RNDIS device
[1627905.748089] userif-2: sent link down event.
[1627905.748098] userif-2: sent link up event.<6>[1627910.599519] usb 5-2: new full-speed USB device number 42 using ohci_hcd
**[1627910.758329] usb 5-2: not running at top speed; connect to a high speed hub
[1627910.768319] usb 5-2: New USB device found, idVendor=0451, idProduct=6141
[1627910.768331] usb 5-2: New USB device strings: Mfr=33, Product=37, SerialNumber=0
[1627910.768340] usb 5-2: Product: AM335x USB
[1627910.768346] usb 5-2: Manufacturer: Texas Instruments
[1627910.842502] rndis_host 5-2:1.0: usb0: register 'rndis_host' at usb-0000:00:13.0-2, RNDIS device, 9a:1f:85:1c:3d:0e
[1627911.082551] userif-2: sent link down event.
[1627911.082555] userif-2: sent link up event.<6>[1627921.042308] usb 5-2: USB disconnect, device number 42
[1627921.043378] rndis_host 5-2:1.0: usb0: unregister 'rndis_host' usb-0000:00:13.0-2, RNDIS device**
[1627921.243451] userif-2: sent link down event.
[1627921.243461] userif-2: sent link up event.<6>[1627925.167815] usb 5-2: new full-speed USB device number 43 using ohci_hcd
[1627925.326657] usb 5-2: not running at top speed; connect to a high speed hub
[1627925.336645] usb 5-2: New USB device found, idVendor=0451, idProduct=6141
[1627925.336658] usb 5-2: New USB device strings: Mfr=33, Product=37, SerialNumber=0
[1627925.336666] usb 5-2: Product: AM335x USB
[1627925.336673] usb 5-2: Manufacturer: Texas Instruments
[1627925.411023] rndis_host 5-2:1.0: usb0: register 'rndis_host' at usb-0000:00:13.0-2, RNDIS device, 9a:1f:85:1c:3d:0e
[1627925.665530] userif-2: sent link down event.
[1627925.665540] userif-2: sent link up event.<3>[1627960.208500] hub 5-0:1.0: unable to enumerate USB device on port 3
[1627960.448125] usb 2-3: new high-speed USB device number 51 using ehci_hcd
[1627960.581809] usb 2-3: New USB device found, idVendor=14cd, idProduct=121f
[1627960.581814] usb 2-3: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[1627960.581816] usb 2-3: Product: Mass Storage Device
[1627960.581818] usb 2-3: Manufacturer: Generic
[1627960.581820] usb 2-3: SerialNumber: 121F20110712
[1627960.582540] scsi32 : usb-storage 2-3:1.0
[1627961.579368] scsi 32:0:0:0: Direct-Access Mass Storage Device 1.00 PQ: 0 ANSI: 0 CCS
[1627961.580592] sd 32:0:0:0: Attached scsi generic sg3 type 0
[1627961.871287] sd 32:0:0:0: [sdc] 15644672 512-byte logical blocks: (8.01 GB/7.45 GiB)
[1627961.871786] sd 32:0:0:0: [sdc] Write Protect is off
[1627961.871799] sd 32:0:0:0: [sdc] Mode Sense: 03 00 00 00
[1627961.872313] sd 32:0:0:0: [sdc] No Caching mode page found
[1627961.872325] sd 32:0:0:0: [sdc] Assuming drive cache: write through
[1627961.875901] sd 32:0:0:0: [sdc] No Caching mode page found
[1627961.875913] sd 32:0:0:0: [sdc] Assuming drive cache: write through
[1627961.876801] sdc: sdc1 sdc2
[1627961.883007] sd 32:0:0:0: [sdc] No Caching mode page found
[1627961.883019] sd 32:0:0:0: [sdc] Assuming drive cache: write through
[1627961.883028] sd 32:0:0:0: [sdc] Attached SCSI removable disk
[1627987.679657] usb 5-2: USB disconnect, device number 43
[1627987.680127] rndis_host 5-2:1.0: usb0: unregister 'rndis_host' usb-0000:00:13.0-2, RNDIS device
[1627987.880125] userif-2: sent link down event.
[1627987.880135] userif-2: sent link up event.<6>[1636287.932125] usb 2-3: USB disconnect, device number 51
[1636372.495480] usb 5-3: new full-speed USB device number 45 using ohci_hcd
[1636372.673303] usb 5-3: New USB device found, idVendor=0403, idProduct=6001
[1636372.673316] usb 5-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Parece que está conectado a partir desta saída, mas quando tento me conectar a /dev/ttyUSB0 ele não reconhece ttyUSB0.
Eu tentei alterar as permissões também como foi sugerido em outro post sem sucesso. Quando eu estou tentando se conectar com Putty em /dev/ttyUSB0 com uma velocidade de 115200 baud nada acontece visualmente quando eu clico em conectar.
Eu também estou usando o moserial, mas não vejo o USB0 em sua lista suspensa. Alguma sugestão ou direção sobre onde procurar é muito apreciada?
De acordo com o site de suporte beaglebone , você não precisa de nenhum driver especial para funcionar no linux, mas pode ser necessário execute o script ( mkudevrule.sh ) que eles fornecem para criar algumas regras do udev. E verifique o seu cabo USB para contato adequado (eu sei que soa trivial, mas leva apenas alguns segundos para verificar e você pode economizar muitas horas de solução de problemas.)
Eu tive o mesmo problema, acabou por ser o cabo mini-usb (provavelmente não estava fornecendo energia suficiente). Você pode tentar o cabo mais curto que encontrar.