hwdetector

README.md

@@ -4,4 +4,8 @@ GlobalLogic Kharkiv, 2020
 
 This repository is aimed for sharing our exercises and your solutions in scope of the course.
 
+Homeworks:
+- hwdetect - detect attached hardware using user level script file
+
+
 Please refer to wiki for details.

hwdetect/README.md

@@ -0,0 +1,10 @@
+# Home work hot plugged hardware detector
+
+Create the script 'hwdetect.sh' which detects connected hardware.
+For monitor hardware from user level please use /dev folder,
+output from lsusb and i2detect (optional).
+Most interesting devices are:
+ - USB to TTL convertors,
+ - flash drives,
+ - SD cards,
+ - i2c devices.

hwdetect/example.md

@@ -0,0 +1,37 @@
+Hardware that is detected from start
+
+USB to ttl:
+ttyUSB0
+
+USB flash drives:
+/dev/sda
+
+I2C devices: 
+i2c-3   unknown         i915 gmbus dpd                          N/A
+i2c-1   unknown         i915 gmbus dpc                          N/A
+i2c-4   unknown         DPDDC-A                                 N/A
+i2c-2   unknown         i915 gmbus dpb                          N/A
+i2c-0   unknown         SMBus I801 adapter at f040              N/A
+i2c-5   unknown         DPDDC-C                                 N/A
+
+SD cards: 
+mmcblk0
+
+Active detector
+<disconnected<
+ttyUSB0
+
+>connected>
+ttyUSB0
+
+<disconnected<
+mmcblk0
+
+>connected>
+mmcblk0
+
+>connected>
+/dev/sdb
+
+<disconnected<
+/dev/sdb

hwdetect/hwdetect.sh

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+#!/bin/bash
+
+usb0=$(mktemp)
+flash0=$(mktemp)
+sd0=$(mktemp)
+i2c0=$(mktemp)
+
+usb1=$(mktemp)
+flash1=$(mktemp)
+sd1=$(mktemp)
+i2c1=$(mktemp)
+
+echo -e "Hardware that is detected from start\n"
+echo "USB to ttl:"
+ls /dev | grep ttyUSB* > $usb0
+if [[ -n $(cat $usb0) ]]; then
+    cat $usb0
+else 
+    echo "none"
+fi
+echo
+
+echo "USB flash drives:"
+ls /dev/sd[a-z] > $flash0
+if [[ -n $(cat $flash0) ]]; then
+    cat $flash0
+else
+    echo "none"    
+fi
+echo
+
+echo "I2C devices: "
+i2cdetect -l > $i2c0
+if [[ -n $(cat $i2c0) ]]; then
+    cat $i2c0
+else
+    echo "none"    
+fi
+echo
+
+echo "SD cards: "
+ls /dev | grep -E "mmcblk[0-9]+$" > $sd0
+if [[ -n $(cat $sd0) ]]; then
+    cat $sd0
+else
+    echo "none"    
+fi
+echo
+
+trap 'rm -f $usb0 $usb1 $flash0 $flash1 $i2c0 $i2c1 $sd0 $sd1 && echo -e "\n***********Detection ended***********" && exit' 2 3 15
+
+echo "Active detector"
+while true; do
+    ls /dev | grep ttyUSB* > $usb1
+    usb_to_ttl=$(diff --new-line-format=$'>connected> %l\n' --old-line-format=$'<disconnected< %l\n' --unchanged-group-format='' $usb0 $usb1 )
+
+    ls /dev/sd[a-z] > $flash1
+    flash_drives=$(diff --new-line-format=$'>connected> %l\n' --old-line-format=$'<disconnected< %l\n' --unchanged-group-format='' $flash0 $flash1)
+
+    i2cdetect -l > $i2c1
+    i2c_devices=$(diff --new-line-format=$'>connected> %l\n' --old-line-format=$'<disconnected< %l\n' --unchanged-group-format='' $i2c0 $i2c1)
+
+    ls /dev | grep -E "mmcblk[0-9]+$" > $sd1
+    sd_cards=$(diff --new-line-format=$'>connected> %l\n' --old-line-format=$'<disconnected< %l\n' --unchanged-group-format='' $sd0 $sd1)
+
+    if [[ -n  "$usb_to_ttl" ]]; then
+        for i in $(echo "$usb_to_ttl"); do 
+            echo "$i"
+        done  
+        echo
+        cat $usb1 > $usb0
+    fi
+
+    if [[ -n  "$flash_drives" ]]; then
+        for j in $(echo "$flash_drives"); do 
+            echo "$j"
+        done
+        echo
+        cat $flash1 > $flash0 | 2>/dev/null
+    fi
+
+    if [[ -n  "$i2c_devices" ]]; then
+        for k in $(echo "$i2c_devices"); do 
+            echo "$k"
+        done
+        echo
+        cat $i2c1 > $i2c0
+    fi
+
+    if [[ -n  "$sd_cards" ]]; then
+        for l in $(echo "$sd_cards"); do 
+            echo "$l"
+        done
+        echo
+        cat $sd1 > $sd0
+    fi
+
+    sleep 1
+done