Add freq_ctr app
The freq_ctr app is a small application that is implementing a
simplistic direct-mode frequency counter using the internal 32.768kHz
oscillator and two TC blocks. One of them is used to generate a 1Hz
signal, which is then subsequently used by the other TC to trigger
a counter read after exactly 1s.
This is in itself not something useful on a simtrace2 device. However,
it is a separate 'app' and I prefer to have the code here in master
over some obscure branch that's easy to forget about.
Change-Id: I2249bfb8dd6a88d85d406f3b33537377133d0939
diff --git a/firmware/apps/freq_ctr/Makefile b/firmware/apps/freq_ctr/Makefile
new file mode 100644
index 0000000..1097e9c
--- /dev/null
+++ b/firmware/apps/freq_ctr/Makefile
@@ -0,0 +1,3 @@
+C_FILES += $(C_LIBUSB_RT)
+
+C_FILES += freq_ctr.c