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{{Applies To Bora}}
{{Applies To BoraX}}
{{Applies To BoraLite}}
{{InfoBoxBottom}}
This article details how physical devices are handled by the Linux kernel in the context of the [[Bora_Embedded_Linux_Kit_(BELK)|BELK]] and [[BoraX_Embedded_Linux_Kit_(BXELK)|BXELK]] kits.
== History ==
{| class="wikitable" border="1"
!Version
!Date
!BELK/BXELK version
!Notes
|-
|{{oldid|8547|1.0.0}}
|Apr 2019
|[[BELK/BXELK_software_components#BELK_3.0.2_.2F_BXELK_1.0.1|3.0.0]]
|BELK 3.0.0
|-
|2.0.0
|Jan 2020
|[[BELK/BXELK_software_components#BELK_4.1.0|4.1.0]]
|Updated for BELK/BXELK 4.1.0
|-
|}
==Console UART==
{| class="wikitable"
NOR and NAND flashes are managed as [[Memory_Tecnology_Device_(MTD)|MTD devices]].
Generally speaking, NAND flash memory is partitons partitions are defined using the kernel command line:<pre>Bora> pri mtdpartsmtdparts=mtdparts=pl35x-nand:256K(spl),768K(uboot),256K(env1),256K(env2),6M(fpga),512K(fdt),8M(kernel),-(nand-ubi)Bora></pre>adding <code>addmisc</code> to the <code>bootargs</code> parameters list. The kernel ''dmesg'' will configure the NAND partitions in the devitetreefollowing way:
<pre>
</pre>
<pre>
root@bora:~# cat /proc/mtd
dev: size erasesize name
mtd0: 00080000 00040000 00020000 "nand-SPLspl"mtd1: 00080000 000c0000 00020000 "nand-uboot"mtd2: 00040000 00020000 "nand-uboot-env1"mtd3: 00040000 00020000 "nand-uboot-env2"mtd4: 00440000 00600000 00020000 "nand-bitstreamfpga"mtd5: 00040000 00080000 00020000 "nand-device-treefdt"mtd6: 00400000 00800000 00020000 "nand-linuxkernel"mtd7: 1f600000 3f000000 00020000 "nand-rootfsubi"
</pre>
----
In case <code>canutils</code> package is missing, user can install it directly from DAVE's [[TODO|http://yocto.dave.eu/belk-latest/ BORA package server]] using <code>smart update && smart install canutils</code> commands:
[..snip..]
</pre>
See [[Advanced_use_of_Yocto_build_system_(BELK/BXELK)]] for more information about using Yocto packages and <code>smart</code>
==UART0==
|}
== Temperature sensor sensors ==
Bora SOM has a [http://www.ti.com/lit/ds/symlink/tmp422.pdf TMP421AIDCN] temperature sensor onboard.
# Tcpu
TEMP_RAW=`cat $path_dev_soc_adc/sys/devices/soc0/amba/f8007100.adc/iio:device0/in_temp0_raw`TEMP_OFFSET=`cat $path_dev_soc_adc/sys/devices/soc0/amba/f8007100.adc/iio:device0/in_temp0_offset`TEMP_SCALE=`cat $path_dev_soc_adc/sys/devices/soc0/amba/f8007100.adc/iio:device0/in_temp0_scale`
TEMP=`awk "BEGIN {print (($TEMP_RAW+$TEMP_OFFSET)*$TEMP_SCALE)/1000}"`
echo "Cpu Temp: ${TEMP}"
</pre>
