From c95e8296bf08b39f1198a8075b651e0da24934d1 Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.net>
Date: Sat, 5 May 2018 11:56:54 +0200
Subject: Add spectrum measurement stuff

---
 firmware/calc_framerate.py | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 firmware/calc_framerate.py

(limited to 'firmware/calc_framerate.py')

diff --git a/firmware/calc_framerate.py b/firmware/calc_framerate.py
new file mode 100644
index 0000000..aaedc4d
--- /dev/null
+++ b/firmware/calc_framerate.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+TIMER_FREQ = 30e6 # MHz
+
+
+with open('main.c') as f:
+    lines = f.readlines()
+
+defs = {}
+for line in lines:
+    if line.startswith('#define'):
+        _pragma, name, val, *_comment = line.split()
+        val = defs.get(val, val)
+        defs[name] = val
+
+print('Bit cycle timings:')
+timings_total = 0
+in_array = False
+for line in lines:
+    if not in_array:
+        if line.startswith('static uint16_t timer_period_lookup'):
+            in_array = True
+    else:
+        if '}' in line:
+            break
+        if ',' not in line:
+            continue
+        val, *_comment = line.split(',')
+        for name, defval in defs.items():
+            val = val.replace(name, defval)
+        duration = eval(val)
+        print(duration)
+        timings_total += duration + int(defs['RESET_PERIOD_LENGTH'])
+
+total_len = timings_total/TIMER_FREQ
+print('Total cycles:', timings_total)
+print('Total cycle length: {:.3f}ms'.format(total_len*1e3))
+print('Frame rate: {:.3f}Hz'.format(1/total_len))
-- 
cgit