Nucelo F207ZG USB CDC Example code

[Manikandan K]

Posted on March 22, 2017 at 08:50

Hi, I'm using Nucleo F207ZG board and i did my testing of GPIO using STM32CubeMx(HAL lib) with Eclipse IDE on Ubuntu 04, Now i want to use the USB as Communication Device Class (CDC) but i'm not familiar with usb so is there any example coding for tranfer the data from/to Nucleo board/PC

Note: this post was migrated and contained many threaded conversations, some content may be missing.

[Imen.D]

Posted on March 22, 2017 at 09:30

Hi,

I suggest you to start from the '

CDC_Standalone' 

application

in STM32CubeF2 firmware package

provided within

STM322xG_EVAL

 as an implementation example: 

STM32Cube_FW_F2_V1.4.0\Projects\STM322xG_EVAL\Applications\USB_Device\CDC_Standalone

I recommend you to check the 'STM32Cube USB device library' User manual UM1734. 

Hope this help you.

Imen

[Manikandan K]

Posted on March 22, 2017 at 09:56

Thank you Imen ,

One more question , Whether the sample program given in the STM322xG_EVAL  and STM32F207ZG-Nucleo both are applicable for Nucleo F207ZG board ? then what is the difference between both of the folders ?

Manikandan

[Tesla DeLorean]

Posted on March 22, 2017 at 11:35

Use diff or merge to see. 

More generally the NUCLEO will have a subset of the EVAL board functionality, and frequently uses different pins, but the concepts are portable with minimal effort. 

[Manikandan K]

Posted on March 22, 2017 at 12:39

Thank you for your kind reply ,

I'm going to use Eclipse IDE and Ubuntu 16.04 , How i can see the output ?

Is there any Eclipse plugin for serial terminal window or otherwise i want to use separate serial terminal like cutecom ?

If i use cutecom means, whether i want to install STM32 Virtual COM Port Driver on Linux machine or or using usb-acm driver is enough ah ?

How can i install STM32 Virtual COM Port Driver  on Ubuntu machine?

[rosa gold]

Posted on March 23, 2017 at 17:23

Hey M,

there is no need to install these 'drivers' the usb-acm is sufficient. Just do as u proposed and use a common terminal-application (cutecom, minicom, or even 'cat /dev/ttyACMx'). As far you send / receive (on the STM32-side) without using the uart, the bauderate in the app (on PC-side) doesen't matter.

To find the appropriate device you simply can use dmesg in a terminal right after plugging the usb it will show you the device (like ttyACM0, ttyACM1,..),

but double check the 'Product:'-String it should say  'STM32 Virtual ComPort' not 'STM32 STLink'. The second one is the Programming-connection if you use e.g. the debug interface at the same time..

hope this helps

gr rg

[Manikandan K]

Posted on March 24, 2017 at 07:50

Thank you for spending time for me ,

I attached St in build link with USB Micro B cable (CN1) to ubuntu machine and also connected Micro B cable (CN13) to another USB port of same ubuntu machine but it not showing properly , Ubuntu machine detect only St-link.

[ 6153.780987] cdc_acm 2-2:1.2: ttyACM0: USB ACM device

If i use both side Micro B cable means any problem ?

Sample output

[ 6153.549166] usb 2-2: new full-speed USB device number 6 using xhci_hcd

[ 6153.678548] usb 2-2: New USB device found, idVendor=0483, idProduct=374b[ 6153.678552] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3[ 6153.678554] usb 2-2: Product: STM32 STLink[ 6153.678556] usb 2-2: Manufacturer: STMicroelectronics[ 6153.678558] usb 2-2: SerialNumber: 0671FF485550755187094334[ 6153.678794] usb 2-2: ep 0x84 - rounding interval to 1024 microframes, ep desc says 2040 microframes[ 6153.780987] cdc_acm 2-2:1.2: ttyACM0: USB ACM device[ 6153.781367] usbcore: registered new interface driver cdc_acm[ 6153.781371] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters[ 6153.797895] usb-storage 2-2:1.1: USB Mass Storage device detected[ 6153.798014] scsi host2: usb-storage 2-2:1.1[ 6153.798238] usbcore: registered new interface driver usb-storage[ 6153.800577] usbcore: registered new interface driver uas[ 6154.135971] usb 2-2: USB disconnect, device number 6[ 6154.136343] cdc_acm 2-2:1.2: failed to set dtr/rts[ 6154.501180] usb 2-2: new full-speed USB device number 7 using xhci_hcd[ 6154.630484] usb 2-2: New USB device found, idVendor=0483, idProduct=374b[ 6154.630488] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3[ 6154.630490] usb 2-2: Product: STM32 STLink[ 6154.630492] usb 2-2: Manufacturer: STMicroelectronics[ 6154.630494] usb 2-2: SerialNumber: 0671FF485550755187094334[ 6154.630647] usb 2-2: ep 0x84 - rounding interval to 1024 microframes, ep desc says 2040 microframes[ 6154.684629] usb-storage 2-2:1.1: USB Mass Storage device detected[ 6154.684794] scsi host3: usb-storage 2-2:1.1[ 6154.685121] cdc_acm 2-2:1.2: ttyACM0: USB ACM device[ 6155.681986] scsi 3:0:0:0: Direct-Access MBED microcontroller 1.0 PQ: 0 ANSI: 2[ 6155.682864] sd 3:0:0:0: Attached scsi generic sg2 type 0[ 6155.683414] sd 3:0:0:0: [sdb] 2080 512-byte logical blocks: (1.06 MB/1.02 MiB)[ 6155.683588] sd 3:0:0:0: [sdb] Write Protect is off[ 6155.683598] sd 3:0:0:0: [sdb] Mode Sense: 03 00 00 00[ 6155.683766] sd 3:0:0:0: [sdb] No Caching mode page found[ 6155.683775] sd 3:0:0:0: [sdb] Assuming drive cache: write through[ 6155.691434] sdb:[ 6155.692392] sd 3:0:0:0: [sdb] Attached SCSI removable disk[ 6157.034842] usb 2-2: USB disconnect, device number 7[ 6157.049496] cdc_acm 2-2:1.2: failed to set dtr/rts[ 6157.081220] FAT-fs (sdb): unable to read boot sector to mark fs as dirty[ 6157.521227] usb 2-2: new full-speed USB device number 8 using xhci_hcd[ 6157.650528] usb 2-2: New USB device found, idVendor=0483, idProduct=374b[ 6157.650532] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3[ 6157.650534] usb 2-2: Product: STM32 STLink[ 6157.650536] usb 2-2: Manufacturer: STMicroelectronics[ 6157.650537] usb 2-2: SerialNumber: 0671FF485550755187094334[ 6157.650688] usb 2-2: ep 0x84 - rounding interval to 1024 microframes, ep desc says 2040 microframes[ 6157.704652] usb-storage 2-2:1.1: USB Mass Storage device detected[ 6157.704760] scsi host4: usb-storage 2-2:1.1[ 6157.705109] cdc_acm 2-2:1.2: ttyACM0: USB ACM device[ 6158.701865] scsi 4:0:0:0: Direct-Access MBED microcontroller 1.0 PQ: 0 ANSI: 2[ 6158.702218] sd 4:0:0:0: Attached scsi generic sg2 type 0[ 6158.702542] sd 4:0:0:0: [sdb] 2080 512-byte logical blocks: (1.06 MB/1.02 MiB)[ 6158.702719] sd 4:0:0:0: [sdb] Write Protect is off[ 6158.702724] sd 4:0:0:0: [sdb] Mode Sense: 03 00 00 00[ 6158.703542] sd 4:0:0:0: [sdb] No Caching mode page found[ 6158.703549] sd 4:0:0:0: [sdb] Assuming drive cache: write through[ 6158.714652] sdb:[ 6158.722194] sd 4:0:0:0: [sdb] Attached SCSI removable disk

Thank you for your consideration...

Manikandan

[Manikandan K]

Posted on March 24, 2017 at 08:03

In usbd_conf.c   I did hpcd_USB_OTG_FS.Init.vbus_sensing_enable = DISABLE;

And Heap size as 4000 and stack size as 2000

Then aslo it's STm Target board not  detect , what i want to do ? Is there is problem in USB Cable whic i fixed Micro B usb cable in CN13

And what about jumper JP4 , (I'm using USB as device only so i OFF it )

[Manikandan K]

Posted on March 27, 2017 at 08:29

Hi all,

Finally i got solution for my doubt ,

Actually what i did mistake means in STM32cubeMx i giving a input frequency as 25 Mhz, but in Nucleo F207ZG board only having 8 Mhz . Now i set  it as 8 Mhz and my USB_CDC(Virtual com port is working good in GtkTerm ),

Now UART is not needed only UART communication through USB .

For coding i refer to the webside 

https://www.youtube.com/watch?v=Jpul3w10tOU

Manikandan

[Pranay Dhuri]

Posted on May 22, 2017 at 12:07

Hi

K.Manikandan

,

I am also trying the same with STM32F207ZG nucleo board... and as you said i changed i/p clock to 8 MHz...but still i didn't get it working, It is not recognizing USB...can you suggest the steps that you followed to get it working...

Thanks.