Difference between revisions of "DESK-MX8M-L/Peripherals/USB2 OTG"

From DAVE Developer's Wiki
Jump to: navigation, search
 
(21 intermediate revisions by 3 users not shown)
Line 3: Line 3:
 
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
 
|-  
 
|-  
−
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
 
 
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
 
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
 
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
 
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
 
|-
 
|-
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
+
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|{{oldid|15718|2021/12/30}}
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Jan 2022
+
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK-MX8M-L release
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK-MX8M release
+
|-
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{oldid|17615|2023/02/24}}
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX8M-L-2.0.0 release
 +
|-
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{oldid|19174|2023/08/22}}
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX8M-L-4.0.0 release
 +
|-
 +
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2024/04/11
 +
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |DESK-MX8M-L-4.1.0 release
 
|-
 
|-
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|2.0.0
 
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Feb 2023
 
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|DESK-MX8M-L-2.0.0
 
 
|}
 
|}
 
<section end=History/>
 
<section end=History/>
 
<section begin=Body/>
 
<section begin=Body/>
  
−
==Peripheral USB Host ==
+
==Peripheral USB2 OTG ==
  
−
The USB2 Type-C port requires to configure the USB VBUS regulator and the '''gpio''' used for enabling the 5V USB power switch in Host mode.
+
=== Device tree configuration ===
  
−
=== Device tree configuration ===
+
==== ORCA SOM ====
  
 
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
 
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
Line 31: Line 35:
 
...
 
...
 
...
 
...
−
&usb3_phy0 {
+
&usb3_phy1 {
−
vbus-power-supply = <&ptn5110>;
+
fsl,phy-tx-preemp-amp-tune = <2>;
−
fsl,phy-tx-vref-tune = <6>;
 
−
fsl,phy-tx-rise-tune = <0>;
 
−
fsl,phy-tx-preemp-amp-tune = <3>;
 
−
fsl,phy-comp-dis-tune = <7>;
 
−
fsl,pcs-tx-deemph-3p5db = <0x21>;
 
−
fsl,phy-pcs-tx-swing-full = <0x7f>;
 
 
status = "okay";
 
status = "okay";
 
};
 
};
  
−
&usb3_0 {
+
&usb3_1 {
 
status = "okay";
 
status = "okay";
 
};
 
};
  
−
&usb_dwc3_0 {
+
&usb_dwc3_1 {
 +
dr_mode = "otg";
 +
extcon = <&extcon_usbotg2>;
 +
hnp-disable;
 +
srp-disable;
 +
adp-disable;
 +
rsp-disable;
 +
disable-over-current;
 +
status = "okay";
 +
};
 +
...
 +
...
 +
</pre>
 +
 
 +
==== MITO 8M Mini ====
 +
 
 +
Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini:
 +
 
 +
From <code>imx8mm-mito8mmini.dtsi</code>:
 +
 
 +
<pre>
 +
...
 +
...
 +
&usbotg2 {
 
dr_mode = "host";
 
dr_mode = "host";
−
status = "okay";
+
picophy,pre-emp-curr-control = <3>;
 +
picophy,dc-vol-level-adjust = <7>;
 +
status = "disabled";
 +
};
 +
...
 +
...
 +
</pre>
 +
 
 +
From <code>imx8mm-mito8mmini-sbcx.dts</code>:
 +
 
 +
<pre>
 +
...
 +
...
 +
/ {
 +
 
 +
regulators: regulators {
 +
compatible = "simple-bus";
 +
#address-cells = <1>;
 +
#size-cells = <0>;
  
−
port {
+
reg_usb_pwr: usb_pwr {
−
usb3_drd_sw: endpoint {
+
compatible = "regulator-fixed";
−
remote-endpoint = <&typec_dr_sw>;
+
regulator-name = "usb_pwr_en";
 +
regulator-min-microvolt = <5000000>;
 +
regulator-max-microvolt = <5000000>;
 +
gpio = <&gpio1 12 GPIO_ACTIVE_HIGH>;
 +
enable-active-high;
 
};
 
};
 +
...
 +
...
 +
};
 +
};
 +
...
 +
...
 +
&usbotg2 {
 +
pinctrl-names = "default";
 +
pinctrl-0 = <&pinctrl_usb_pwr>;
 +
vbus-supply = <&reg_usb_pwr>;
 +
status = "okay";
 +
};
 +
...
 +
...
 +
&iomuxc {
 +
...
 +
...
 +
pinctrl_usb_pwr: usbpwrgrp {
 +
fsl,pins = <
 +
MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12   0x19
 +
>;
 
};
 
};
 +
...
 +
...
 
};
 
};
 +
</pre>
 +
...
 +
...
 +
</pre>
  
 +
===Accessing the peripheral SBC ORCA===
 +
 +
====Linux messages in host mode====
 +
 +
When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.)
 +
 +
<pre class="workstation-terminal">
 +
root@desk-mx8mp:~# [  949.406404] [ 6491.481175] usb 3-1: new high-speed USB device number 3 using xhci-hcd
 +
[ 6491.639810] usb-storage 3-1:1.0: USB Mass Storage device detected                   
 +
[ 6491.646905] scsi host0: usb-storage 3-1:1.0                                                                       
 +
[ 6493.775259] scsi 0:0:0:0: Direct-Access    Fanxiang F206            1100 PQ: 0 ANSI: 4
 +
[ 6493.786654] sd 0:0:0:0: [sda] 61440000 512-byte logical blocks: (31.5 GB/29.3 GiB)                     
 +
[ 6493.795475] sd 0:0:0:0: [sda] Write Protect is off                                                                 
 +
[ 6493.801799] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
 +
[ 6493.818546]  sda: sda1                                                                                             
 +
[ 6493.824653] sd 0:0:0:0: [sda] Attached SCSI removable disk
 +
root@desk-mx8mp:~#
 
</pre>
 
</pre>
  
−
===Accessing the peripheral===
+
When a USB 3.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.)
−
====Linux messages at boot time====
 
  
−
When a USB peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.)
+
<pre class="workstation-terminal">
 +
root@desk-mx8mp:~# [ 6798.669673] usb 4-1: new SuperSpeed USB device number 3 using xhci-hcd
 +
[ 6798.703673] usb-storage 4-1:1.0: USB Mass Storage device detected
 +
[ 6798.710479] scsi host1: usb-storage 4-1:1.0
 +
[ 6799.719808] scsi 1:0:0:0: Direct-Access    Wilk    USB DISK 3.0    PMAP PQ: 0 ANSI: 6
 +
[ 6799.732902] sd 1:0:0:0: [sdb] 60628992 512-byte logical blocks: (31.0 GB/28.9 GiB)
 +
[ 6799.741747] sd 1:0:0:0: [sdb] Write Protect is off
 +
[ 6799.747177] sd 1:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
 +
[ 6799.934800]  sdb:
 +
[ 6799.940848] sd 1:0:0:0: [sdb] Attached SCSI removable disk
 +
</pre>
 +
 
 +
==== Usage in device mode with [https://www.kernel.org/doc/Documentation/usb/mass-storage.txt mass-storage] ====
  
 
<pre class="workstation-terminal">
 
<pre class="workstation-terminal">
−
root@desk-mx8mp:~# [ 2406.464399] usb 6-1: USB disconnect, device number 2
+
root@desk-mx8mp:~# dd if=/dev/zero of=mass_storage count=256 bs=1M
−
[ 2407.644440] usb 2-1.3: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd
+
256+0 records in                                                                                                     
−
[ 2407.670023] usb-storage 2-1.3:1.0: USB Mass Storage device detected
+
256+0 records out 
−
[ 2407.677192] scsi host0: usb-storage 2-1.3:1.0
+
268435456 bytes (268 MB, 256 MiB) copied, 0.987911 s, 272 MB/s
−
[ 2408.691090] scsi 0:0:0:0: Direct-Access    HYPER    FLASHDISK        1507 PQ: 0 ANSI: 0
+
root@desk-mx8mp:~# mkfs.msdos mass_storage                                                                                                                                                                                                   
−
[ 2408.701469] sd 0:0:0:0: [sda] 129630208 512-byte logical blocks: (66.4 GB/61.8 GiB)
+
mkfs.fat 4.2 (2021-01-31)
−
[ 2408.709458] sd 0:0:0:0: [sda] Write Protect is off
+
root@desk-mx8mp:~# mkdir loop
−
[ 2408.714509] sd 0:0:0:0: [sda] No Caching mode page found
+
root@desk-mx8mp:~# mount -o loop mass_storage loop
−
[ 2408.719856] sd 0:0:0:0: [sda] Assuming drive cache: write through
+
[ 6664.248804] loop0: detected capacity change from 0 to 524288
−
[ 2408.743246] sda: sda1
+
root@desk-mx8mp:~# echo "Test USB OTG with mass storage device" > loop/usb.txt
−
[ 2408.747220] sd 0:0:0:0: [sda] Attached SCSI removable disk
+
root@desk-mx8mp:~# umount loop
 +
root@desk-mx8mp:~#
 +
</pre>
 +
 
 +
then insert the <code>g_mass_storage</code> kernel module driver enabling an Windows PC to see it as a ''removable device''
 +
 
 +
<pre class="workstation-terminal">
 +
root@desk-mx8mp:~# modprobe g_mass_storage removable=y file=mass_storage
 +
[ 6677.844877] Mass Storage Function, version: 2009/09/11
 +
[ 6677.850190] LUN: removable file: (no medium)
 +
[ 6677.854585] LUN: removable file: /home/root/mass_storage
 +
[ 6677.859933] Number of LUNs=1
 +
[ 6677.863239] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
 +
[ 6677.870221] g_mass_storage gadget: userspace failed to provide iSerialNumber
 +
[ 6677.877281] g_mass_storage gadget: g_mass_storage ready
 
root@desk-mx8mp:~#
 
root@desk-mx8mp:~#
 
</pre>
 
</pre>
  
−
=== Additional information ===
+
Once the USB cable is connected to the PC, the kernel prints the following messages:
 +
 
 +
<pre class="workstation-terminal">
 +
root@desk-mx8mp:~# [ 1493.477167] g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage
 +
</pre>
 +
 
 +
and the Windows PC activate the driver and the disk is available as a Drive Unit (with the ''usb.txt'' file available).
 +
 
 +
===Accessing the peripheral MITO 8M Mini===
 +
 
 +
====Linux messages====
 +
 
 +
When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.)
 +
 
 +
<pre class="workstation-terminal">
 +
root@desk-mx8mm:~# [  22.858909] usb 1-1: new high-speed USB device number 2 using ci_hdrc
 +
[  23.022240] usb-storage 1-1:1.0: USB Mass Storage device detected
 +
[  23.028819] scsi host0: usb-storage 1-1:1.0
 +
[  24.045317] scsi 0:0:0:0: Direct-Access    SanDisk  Cruzer Force    1.00 PQ: 0 ANSI: 6
 +
[  24.055280] sd 0:0:0:0: [sda] 60088320 512-byte logical blocks: (30.8 GB/28.7 GiB)
 +
[  24.063993] sd 0:0:0:0: [sda] Write Protect is off
 +
[  24.069617] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
 +
[  24.142194]  sda: sda1
 +
[  24.150358] sd 0:0:0:0: [sda] Attached SCSI removable disk
 +
</pre>
 +
 
 +
=== Additional information in host mode ===
 +
 
 
If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command:
 
If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command:
  
Line 103: Line 242:
 
----
 
----
  
−
[[Category:ORCA]]
+
[[Category:ORCA]] [[Category:MITO 8M Mini]]

Latest revision as of 13:41, 15 April 2024

HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
History
Issue Date Notes

2021/12/30

First DESK-MX8M-L release

2023/02/24

DESK-MX8M-L-2.0.0 release

2023/08/22

DESK-MX8M-L-4.0.0 release
2024/04/11 DESK-MX8M-L-4.1.0 release


Peripheral USB2 OTG[edit | edit source]

Device tree configuration[edit | edit source]

ORCA SOM[edit | edit source]

Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:

From imx8mp-mito8mplus-cb1001.dts: 

...
...
&usb3_phy1 {
	fsl,phy-tx-preemp-amp-tune = <2>;
	status = "okay";
};

&usb3_1 {
	status = "okay";
};

&usb_dwc3_1 {
	dr_mode = "otg";
	extcon = <&extcon_usbotg2>;
	hnp-disable;
	srp-disable;
	adp-disable;
	rsp-disable;
	disable-over-current;
	status = "okay";
};
...
...

MITO 8M Mini[edit | edit source]

Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini:

From imx8mm-mito8mmini.dtsi: 

...
...
&usbotg2 {
	dr_mode = "host";
	picophy,pre-emp-curr-control = <3>;
	picophy,dc-vol-level-adjust = <7>;
	status = "disabled";
};
...
...

From imx8mm-mito8mmini-sbcx.dts: 

...
...
/ {

	regulators: regulators {
		compatible = "simple-bus";
		#address-cells = <1>;
		#size-cells = <0>;

		reg_usb_pwr: usb_pwr {
			compatible = "regulator-fixed";
			regulator-name = "usb_pwr_en";
			regulator-min-microvolt = <5000000>;
			regulator-max-microvolt = <5000000>;
			gpio = <&gpio1 12 GPIO_ACTIVE_HIGH>;
			enable-active-high;
		};
...
...
	};
};
...
...
&usbotg2 {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_usb_pwr>;
	vbus-supply = <&reg_usb_pwr>;
	status = "okay";
};
...
...
&iomuxc {
...
...
	pinctrl_usb_pwr: usbpwrgrp {
		fsl,pins = <
			MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12			  0x19
		>;
	};
...
...
};

... ...

Accessing the peripheral SBC ORCA[edit | edit source]

Linux messages in host mode[edit | edit source]

When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) 

root@desk-mx8mp:~# [  949.406404] [ 6491.481175] usb 3-1: new high-speed USB device number 3 using xhci-hcd
[ 6491.639810] usb-storage 3-1:1.0: USB Mass Storage device detected                     
[ 6491.646905] scsi host0: usb-storage 3-1:1.0                                                                         
[ 6493.775259] scsi 0:0:0:0: Direct-Access     Fanxiang F206             1100 PQ: 0 ANSI: 4
[ 6493.786654] sd 0:0:0:0: [sda] 61440000 512-byte logical blocks: (31.5 GB/29.3 GiB)                       
[ 6493.795475] sd 0:0:0:0: [sda] Write Protect is off                                                                  
[ 6493.801799] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 6493.818546]  sda: sda1                                                                                              
[ 6493.824653] sd 0:0:0:0: [sda] Attached SCSI removable disk
root@desk-mx8mp:~#

When a USB 3.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) 

root@desk-mx8mp:~# [ 6798.669673] usb 4-1: new SuperSpeed USB device number 3 using xhci-hcd
[ 6798.703673] usb-storage 4-1:1.0: USB Mass Storage device detected
[ 6798.710479] scsi host1: usb-storage 4-1:1.0
[ 6799.719808] scsi 1:0:0:0: Direct-Access     Wilk     USB DISK 3.0     PMAP PQ: 0 ANSI: 6
[ 6799.732902] sd 1:0:0:0: [sdb] 60628992 512-byte logical blocks: (31.0 GB/28.9 GiB)
[ 6799.741747] sd 1:0:0:0: [sdb] Write Protect is off
[ 6799.747177] sd 1:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 6799.934800]  sdb:
[ 6799.940848] sd 1:0:0:0: [sdb] Attached SCSI removable disk

Usage in device mode with mass-storage[edit | edit source]

root@desk-mx8mp:~#  dd if=/dev/zero of=mass_storage count=256 bs=1M
256+0 records in                                                                                                       
256+0 records out   
268435456 bytes (268 MB, 256 MiB) copied, 0.987911 s, 272 MB/s
root@desk-mx8mp:~# mkfs.msdos mass_storage                                                                                                                                                                                                    
mkfs.fat 4.2 (2021-01-31)
root@desk-mx8mp:~# mkdir loop
root@desk-mx8mp:~# mount -o loop mass_storage loop
[ 6664.248804] loop0: detected capacity change from 0 to 524288
root@desk-mx8mp:~# echo "Test USB OTG with mass storage device" > loop/usb.txt
root@desk-mx8mp:~# umount loop
root@desk-mx8mp:~#

then insert the g_mass_storage kernel module driver enabling an Windows PC to see it as a removable device 

root@desk-mx8mp:~# modprobe g_mass_storage removable=y file=mass_storage
[ 6677.844877] Mass Storage Function, version: 2009/09/11
[ 6677.850190] LUN: removable file: (no medium)
[ 6677.854585] LUN: removable file: /home/root/mass_storage
[ 6677.859933] Number of LUNs=1
[ 6677.863239] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
[ 6677.870221] g_mass_storage gadget: userspace failed to provide iSerialNumber
[ 6677.877281] g_mass_storage gadget: g_mass_storage ready
root@desk-mx8mp:~#

Once the USB cable is connected to the PC, the kernel prints the following messages: 

root@desk-mx8mp:~# [ 1493.477167] g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage

and the Windows PC activate the driver and the disk is available as a Drive Unit (with the usb.txt file available).

Accessing the peripheral MITO 8M Mini[edit | edit source]

Linux messages[edit | edit source]

When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) 

root@desk-mx8mm:~# [   22.858909] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[   23.022240] usb-storage 1-1:1.0: USB Mass Storage device detected
[   23.028819] scsi host0: usb-storage 1-1:1.0
[   24.045317] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Force     1.00 PQ: 0 ANSI: 6
[   24.055280] sd 0:0:0:0: [sda] 60088320 512-byte logical blocks: (30.8 GB/28.7 GiB)
[   24.063993] sd 0:0:0:0: [sda] Write Protect is off
[   24.069617] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[   24.142194]  sda: sda1
[   24.150358] sd 0:0:0:0: [sda] Attached SCSI removable disk

Additional information in host mode[edit | edit source]

If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command: 

root@desk-mx8mp:~# mkdir -p /mnt/usb
root@desk-mx8mp:~# mount /dev/sda1 /mnt/usb
[ 1245.415662] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
root@desk-mx8mp:~# ls -la /mnt/usb
total 128
drwxr-xr-x 10 root root  4096 Jan  1  1970 .
drwxr-xr-x  3 root root  4096 Dec 30 11:24 ..
drwxr-xr-x  2 root root  4096 May 13  2021 System Volume Information
drwxr-xr-x  2 root root  4096 Nov 17 15:27 boot
-rwxr-xr-x  1 root root  8016 Nov 17 15:27 boot.scr
-rwxr-xr-x  1 root root  1712 Dec 10 16:16 config.txt
drwxr-xr-x  2 root root  4096 Nov 17 15:27 rfs
-rwxr-xr-x  1 root root 57458 Nov 17 15:27 run-system-update.sh
-rwxr-xr-x  1 root root   531 Nov 17 15:27 settings.txt


HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
Retrieved from "https://wiki.dave.eu/index.php?title=DESK-MX8M-L/Peripherals/USB2_OTG&oldid=20346"