~~NOCACHE~~
~~NOTOC~~

<embed en:templates:tabs_yocto_bootstrap>
  <label product_type>Embedded module</label>
  <label lang>en</label>
  <label mod_name>tqma8xxs</label>
  <label mod_name_head>TQMa8XxS</label>
  <label mod_arch>arm</label>
  <label bsp_name>linux</label>
  <label build_system>yocto</label>
  <label build_system_head>YOCTO</label>
  <label bsp_name_head>Linux</label>
</embed>
\\  
\\


===== Starterkit Interfaces and Functions =====

<embed en:templates:howto:audio> 
<label audio_description> The microphone input is not supported in the current BSP version. </label>
<label microphone>X19</label>
<label linein>X17</label>
<label lineout>X18</label>
<label mb_name>MB-SMARC-2</label>
<label audio_image>{{ :en:arm:tqma8xxs:linux:yocto:how_to:mbsmarc2_audio.png?nolink&400 |}}</label>
</embed>

<embed en:templates:howto:can>
<label can_description>The MB-SMARC-2 provides the CAN interfaces CAN0 and CAN1.</label>

<label can_limitation><callout type="info" icon="true">
CAN FD can not be automatically configured by systemd machine units due to a limitation in the systemd version in Yocto Zeus,\\\   
it can be enabled by the following commands in the shell:
\\\  
<code>
ip link set can0 down
ip link set can0 up type can bitrate 500000 sample-point 0.75 dbitrate 4000000 dsample-point 0.8 fd on
ip link set can1 down
ip link set can1 up type can bitrate 500000 sample-point 0.75 dbitrate 4000000 dsample-point 0.8 fd on
</code>
</callout>
</label>

<label dipdescription>DIP switch S4 is used to configure the CAN interfaces CAN0 and CAN1.</label>
<label dip1>S4-1-1</label>
<label dip2>S4-2</label>
<label can_image>{{ :en:arm:tqma8xxs:linux:yocto:how_to:tqma8xxs_can_loopback.png?nolink&400 |}}</label>
</embed>

<embed en:templates:howto:cpu>
<label stk_name>STKa8XxS</label>
</embed>

<embed en:templates:howto:ethernet>
<label ethernet_description>The STKa8XxS Starterkit provides two Gigabit Ethernet interfaces.</label>
<label ubootdescription>In U-Boot eth0 is configured as default interface. The IP configuration can be done statically or by a DHCP server in the network.</label>
<label linuxdescription>Both Ethernet interfaces are activated and configured by systemd-network. The configuration files for the interfaces are located in /lib/systemd/network/ these configuration files can be altered to customize the default interface configuration. </label>
<label ethernet_table>| eth0  | 10-eth0.network  |
| eth1  | 10-eth1.network  |</label>
</embed>

<embed en:templates:howto:gpu>
</embed>

<embed en:templates:howto:i2c>
<label mod_name>tqma8xxs</label>
<label mod_arch>arm</label>
<label ubooti2c>0</label>
<label linuxi2c>16</label>
</embed>

<embed en:templates:howto:lvds>
<label stk_name>STKa8XxS</label>
<label lvds_description>**Note:** For the backlight on the MB-SMARC-2 you can bridge X14 pin 1 and 2 to provide 12V.
</label>
<label lvds_table>^ Interface ^ Device tree ^
| LVDS0 | imx8qxp-mb-smarc-2-lvds0-tm070jvhg33.dtb |
| LVDS0, dual | imx8qxp-mb-smarc-2-lvds0-g133han01.dtb |
| LVDS1 | imx8qxp-mb-smarc-2-lvds1-tm070jvhg33.dtb |</label>
<label lvds_example><device tree>'' (e.g. ''setenv fdt_file imx8qxp-mb-smarc-2-lvds0-tm070jvhg33.dtb'')</label>
</embed>

<embed en:templates:howto:rtc>
</embed>

<embed en:templates:howto:spi>
<label mb_name>MB-SMARC-2</label>
<label amountspi>one</label>
<label spi_table>| SPI0| /dev/spidev0.0  |</label>
<label spi_bridges>* SPI0: bridge between X24_16 (SPI1_MISO) and X24_15 (SPI1_MOSI)</label>
</embed>

<embed en:templates:howto:ssh>
<label stk_name>STKa8XxS</label>
</embed>


<embed en:templates:howto:temperature>
<label temp_description>The STKa8XxS has one temperature sensor, located on the TQMa8xxS SOM.
^ Device ^ I²C Address  ^
| TQMa8XxS  | 0x1B  |
</label>
<label temp_sensors>
**Read TQMa8XxS Temperature Sensor**
<code>
cat /sys/devices/platform/bus@5a000000/5a800000.i2c/i2c-16/16-001b/hwmon/hwmon0/temp1_input
</code>

**Read CPU internal Temperature Sensor**\\\
The i.MX8Xx CPU has an internal TMU that supports two thermal zones, both can be read by the commands below:  

**Thermal zone0**
<code>
cat /sys/devices/virtual/thermal/thermal_zone0/temp
</code>

**Thermal zone1**
<code>
cat /sys/devices/virtual/thermal/thermal_zone1/temp
</code>

</label>
</embed>

<embed en:templates:howto:usb>
</embed>

===== SSH connection on STKa8XxS =====

<WRAP round important>Please keep in mind that the following instructions focus on simplicity, not on security.</WRAP> 

<WRAP round info>For the sake of simplicity password authentification can be used for SSH.</WRAP>

=== Setup Yocto build environment ===

The OpenSSH sftp server is not installed into the image by default, add the following to your local.conf to install it.

<code>IMAGE_INSTALL_append = “openssh-sftp-server”</code>


=== Setup on Target ===

To setup a password for the default user root, 
execute the command **passwd root** and set your password.

=== Modify SSH configuration ===

Uncomment the following options in **/etc/ssh/sshd_config** to allow that the user root can authenticate 
with a password on the STKa8XxS.

<code>PermitRootLogin yes
PasswordAuthentication yes
</code>
\\