From d7b8753d40d964ee9e66f8e0f869dfb00414c26b Mon Sep 17 00:00:00 2001
From: schneider <schneider@blinkenlichts.net>
Date: Sat, 11 Apr 2020 04:18:32 +0200
Subject: [PATCH] fix(max86150): Use 4x averaging on chip
---
epicardium/modules/max86150.c | 2 ++
preload/apps/spo2/__init__.py | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/epicardium/modules/max86150.c b/epicardium/modules/max86150.c
index 154705bfa..f452f303c 100644
--- a/epicardium/modules/max86150.c
+++ b/epicardium/modules/max86150.c
@@ -66,6 +66,8 @@ int epic_max86150_enable_sensor(
ppg_sample_rate = MAX86150_PPG_SAMPLERATE_100;
} else if (config->ppg_sample_rate == 200) {
ppg_sample_rate = MAX86150_PPG_SAMPLERATE_200;
+ } else if (config->ppg_sample_rate == 400) {
+ ppg_sample_rate = MAX86150_PPG_SAMPLERATE_400;
} else {
result = -EINVAL;
goto out_free;
diff --git a/preload/apps/spo2/__init__.py b/preload/apps/spo2/__init__.py
index dbe9b83c4..120666228 100644
--- a/preload/apps/spo2/__init__.py
+++ b/preload/apps/spo2/__init__.py
@@ -7,7 +7,7 @@ import buttons
class SPO2:
def __init__(self):
self.sensor = None
- self.RATE = 128
+ self.RATE = 100
self.HISTORY_MAX = self.RATE * 4
self.history = []
self.update_screen = 0
@@ -35,7 +35,7 @@ class SPO2:
if self.update_screen >= self.DRAW_AFTER_SAMPLES:
self.draw_histogram()
- self.sensor = max86150.MAX86150(callback)
+ self.sensor = max86150.MAX86150(callback=callback, sample_rate=self.RATE * 4)
while True:
utime.sleep(.1)
if buttons.read(buttons.BOTTOM_RIGHT):
--
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