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authorbrad <brad@NetBSD.org>2022-11-24 21:07:05 +0000
committerbrad <brad@NetBSD.org>2022-11-24 21:07:05 +0000
commit2795ca978660ee2b56d126939824cc76e99ee42a (patch)
treeff3dbe6f1c795031d4bd748786a8d7a1fe3e375c /sys/dev
parentc837eca39beb051f03fda09ba1918fadf0aed394 (diff)
Mention where in the datasheet the compensation algorithms came from.
Diffstat (limited to 'sys/dev')
-rw-r--r--sys/dev/i2c/bmx280.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/sys/dev/i2c/bmx280.c b/sys/dev/i2c/bmx280.c
index fe58787e511..f9141de74b1 100644
--- a/sys/dev/i2c/bmx280.c
+++ b/sys/dev/i2c/bmx280.c
@@ -1,4 +1,4 @@
-/* $NetBSD: bmx280.c,v 1.3 2022/11/23 23:45:29 brad Exp $ */
+/* $NetBSD: bmx280.c,v 1.4 2022/11/24 21:07:05 brad Exp $ */
/*
* Copyright (c) 2022 Brad Spencer <brad@anduin.eldar.org>
@@ -17,7 +17,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bmx280.c,v 1.3 2022/11/23 23:45:29 brad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bmx280.c,v 1.4 2022/11/24 21:07:05 brad Exp $");
/*
Driver for the Bosch BMP280/BME280 temperature, humidity (sometimes) and
@@ -643,8 +643,13 @@ out:
sc->sc_sme = NULL;
}
-/* The conversion algorithms are taken from the Bosch datasheet for
- * the BMX280 and adapted to the envsys infrastructure.
+/* The conversion algorithms are taken from the BMP280 datasheet. The
+ * same algorithms are used with the BME280.
+ *
+ * https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmp280-ds001.pdf
+ *
+ * Section 3.11.3, page 21
+ *
*/
static int32_t