driver: rs485 test support

Adds test functionality with TEST_CASE_MULTIPLE_DEVICES() macro for RS485 test support.

.gitlab-ci.yml

@@ -1267,6 +1267,31 @@ UT_008_04:
     - UT_T1_LEDC
     - psram
     
+UT_009_01:
+  <<: *unit_test_template
+  tags:
+    - ESP32_IDF
+    - UT_T2_RS485
+
+UT_009_02:
+  <<: *unit_test_template
+  tags:
+    - ESP32_IDF
+    - UT_T2_RS485
+    
+UT_009_03:
+  <<: *unit_test_template
+  tags:
+    - ESP32_IDF
+    - UT_T2_RS485
+
+UT_009_04:
+  <<: *unit_test_template
+  tags:
+    - ESP32_IDF
+    - UT_T2_RS485
+    - psram
+
 UT_010_01:
   <<: *unit_test_template
   tags:

components/driver/test/test_uart.c

@@ -324,5 +324,5 @@ static void rs485_master()
  * correctness of RS485 interface channel communication. It requires
  * RS485 bus driver hardware to be connected to boards.
 */
-TEST_CASE_MULTIPLE_DEVICES("RS485 half duplex uart multiple devices test.", "[driver][ignore]", rs485_master, rs485_slave);
+TEST_CASE_MULTIPLE_DEVICES("RS485 half duplex uart multiple devices test.", "[driver_RS485][test_env=UT_T2_RS485][timeout=200]", rs485_master, rs485_slave);