From 92d2a727f5c34d418628e7970e37eeb3302e89ac Mon Sep 17 00:00:00 2001
From: Francisco Molina <femolina@uc.cl>
Date: Tue, 21 Jul 2020 11:45:02 +0200
Subject: [PATCH] tests/periph_gpio: allow specifying port under test

---
 tests/periph_gpio/Makefile          | 15 +++++++++++++++
 tests/periph_gpio/tests/02-bench.py |  5 ++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/tests/periph_gpio/Makefile b/tests/periph_gpio/Makefile
index 49bebb41a7..0bcec0ce42 100644
--- a/tests/periph_gpio/Makefile
+++ b/tests/periph_gpio/Makefile
@@ -7,7 +7,22 @@ USEMODULE += shell
 USEMODULE += shell_commands
 USEMODULE += benchmark
 
+BOARDS_BENCH_PORT_1 = \
+    slstk3402a \
+    #
+
+# port 0 pins are used for serial output on these boards, e.g.: on slstk3402a
+# PA5 (or port 0, pin 5) is used to control the BC enabling serial output,
+# therefore test on port 1.
+ifneq (,$(filter $(BOARD),$(BOARDS_BENCH_PORT_1)))
+  PORT_UNDER_TEST ?= 1
+else
+  PORT_UNDER_TEST ?= 0
+endif
+
 include $(RIOTBASE)/Makefile.include
 
+$(call target-export-variables,test,PORT_UNDER_TEST)
+
 bench:
 	tests/02-bench.py
diff --git a/tests/periph_gpio/tests/02-bench.py b/tests/periph_gpio/tests/02-bench.py
index 1932e41021..7439ce02d8 100755
--- a/tests/periph_gpio/tests/02-bench.py
+++ b/tests/periph_gpio/tests/02-bench.py
@@ -7,16 +7,19 @@
 # directory for more details.
 
 import sys
+import os
 from testrunner import run
 
 
 # On slow platforms, like AVR, this test can take some time to complete.
 TIMEOUT = 30
+# Allow setting a specific port to test
+PORT_UNDER_TEST = int(os.environ.get('PORT_UNDER_TEST') or 0)
 
 
 def testfunc(child):
     for pin in range(0, 8):
-        child.sendline("bench 0 {}".format(pin))
+        child.sendline("bench {} {}".format(PORT_UNDER_TEST, pin))
         child.expect(r" *nop loop: +(\d+)us  --- +(\d+\.\d+)us per call  --- +(\d+) calls per sec")
         child.expect(r" *gpio_set: +(\d+)us  --- +(\d+\.\d+)us per call  --- +(\d+) calls per sec")
         child.expect(r" *gpio_clear: +(\d+)us  --- +(\d+\.\d+)us per call  --- +(\d+) calls per sec")