michaelh/zephyr
1
0
Fork 0
Code Releases Activity

sensor: Generic driver for NTC Thermistor

Browse source 
Driver for NTC Thermistors attached to ADC

Signed-off-by: Al Semjonovs <asemjonovs@google.com>
This commit is contained in:
Al Semjonovs 2023-02-13 11:15:24 -07:00 • committed by Maureen Helm
commit 5d4352f322
12 changed files with 531 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

47
tests/drivers/build_all/sensor/adc.dtsi
View file

@ -1,14 +1,59 @@
/*
* Copyright (c) 2023 FTP Technologies
* Copyright (c) 2023, Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*
* Application overlay for ADC devices
*/
test_adc_mcp9700a: mcp9700a {
#include <zephyr/dt-bindings/adc/adc.h>
test_adc_mcp9700a: mcp9700a {
status = "okay";
compatible = "microchip,mcp970x";
family = "MCP9700/9700A";
io-channels = <&test_adc 0>;
};
adc0: adc {
compatible = "zephyr,adc-emul";
nchannels = <2>;
ref-internal-mv = <3300>;
ref-external1-mv = <5000>;
#io-channel-cells = <1>;
status = "okay";
};
thermistor_R25_10000_B_3974: thermistor-R25-10000-B-3974 {
compatible = "zephyr,ntc-thermistor-rt-table";
/* Format <temp resistance> */
tr-table = <(-25) 146676>,
<(-15) 78875>,
<(-5) 44424>,
<(5) 26075>,
<(15) 15881>,
<(25) 10000>,
<(35) 6488>,
<(45) 4326>,
<(55) 2956>,
<(65) 2066>,
<(75) 1474>,
<(85) 1072>,
<(95) 793>,
<(105) 596>,
<(115) 454>,
<(125) 351>;
};
test_adc_b57861s: b57861s@0 {
compatible = "zephyr,ntc-thermistor";
reg = <0x0 0x1000>;
io-channels = <&adc0 0>;
zephyr,rt-table = <&thermistor_R25_10000_B_3974>;
r25-ohm = <10000>;
pullup-uv = <3300000>;
pullup-ohm = <0>;
pulldown-ohm = <10000>;
connection-type = "NTC_CONNECTED_POSITIVE";
};