tests/periph/selftest_shield: timer allocation conflict

maribu · maribu · commit 57488a57ab1d · 2023-11-20T17:17:26.000+01:00
- Detect when the same timer is used by `ztimer` (pulled in as
  dependency for a peripheral driver, e.g. `periph_adc` on STM32F3) and
  the test application
- Try to provide a better default (e.g. `TIMER_DEV(1)` when
  `ztimer_periph_timer` is in use, `TIMER_DEV(0)` otherwise)
diff --git a/tests/periph/selftest_shield/main.c b/tests/periph/selftest_shield/main.c
@@ -126,7 +126,17 @@
 #  define UART_TEST_DEV UART_DEV(0)
 #endif
 #ifndef TIMER
-#  define TIMER         TIMER_DEV(0)
+#  if IS_USED(MODULE_ZTIMER_PERIPH_TIMER) && CONFIG_ZTIMER_USEC_DEV == TIMER_DEV(0)
+#    define TIMER         TIMER_DEV(1)
+#  else
+#    define TIMER         TIMER_DEV(0)
+#  endif
+#endif
+
+#if IS_USED(MODULE_ZTIMER_PERIPH_TIMER)
+#  if CONFIG_ZTIMER_USEC_DEV == TIMER
+#    error "Same timer used for ztimer and test"
+#  endif
 #endif
 
 /* A higher clock frequency is beneficial in being able to actually measure the
