Add gecko_adc driver usage to tmo_shell

These changes add the gecko_adc driver usage into tmo_shell.

Signed-off-by: Kim Mansfield <[email protected]>

Author: kimmansfield

samples/tmo_shell/CMakeLists.txt

@@ -27,7 +27,6 @@ target_sources(app PRIVATE src/buzzer_test.c)
 target_sources(app PRIVATE src/led_test.c)
 target_sources(app PRIVATE src/misc_test.c)
 target_sources(app PRIVATE src/tmo_file.c)
-target_sources(app PRIVATE src/tmo_adc.c)
 target_sources(app PRIVATE src/tmo_bq24250.c)
 target_sources(app PRIVATE src/tmo_battery_ctrl.c)
 target_sources(app PRIVATE src/tmo_sntp.c)

samples/tmo_shell/boards/tmo_dev_edge.overlay

@@ -3,3 +3,42 @@
  *
  * SPDX-License-Identifier: Apache-2.0
  */
+ #include <zephyr/dt-bindings/adc/adc.h>
+ #include <zephyr/dt-bindings/gpio/gpio.h>
+
+/ {
+	zephyr,user {
+		/* adjust channel number according to pinmux in board.dts */
+		io-channels = <&adc 0>, <&adc 1>;
+        battsense-gpios = <&gpiok 0 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&gpiok {
+    hog1 {
+        gpio-hog;
+        gpios = <0 GPIO_ACTIVE_HIGH>;
+        output-high;
+    };
+};
+
+&adc {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1_3";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_TICKS, 32)>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1_3";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_TICKS, 32)>;
+		zephyr,resolution = <12>;
+	};
+};

samples/tmo_shell/prj.conf

@@ -160,3 +160,4 @@ CONFIG_LOG_PRINTK=n
 CONFIG_TMO_TEST_MFG_CHECK_GOLDEN=y
 CONFIG_TMO_TEST_MFG_CHECK_ACCESS_CODE=y
 CONFIG_DFU_GECKO_LIB=y
+CONFIG_ADC_GECKO=y

samples/tmo_shell/src/tmo_adc.c

@@ -92,3 +92,29 @@ int get_battery_charging_status(uint8_t *charging, uint8_t *vbus, uint8_t *attac
 
 	return status;
 }
+
+
+void battery_apply_filter(float *bv)
+{
+	static float s_filtered_capacity = -1;
+	static bool s_battery_is_charging = false;
+	bool battery_is_charging;
+
+	// If there has been a switch between charger and battery, reset the filter
+	battery_is_charging = is_battery_charging();
+	if (s_battery_is_charging != battery_is_charging) {
+		s_battery_is_charging = battery_is_charging;
+		s_filtered_capacity = -1;
+	}
+
+	if (s_filtered_capacity < 0) {
+		s_filtered_capacity = *bv;
+	}
+	*bv = s_filtered_capacity = s_filtered_capacity * 0.95 + (*bv) * 0.05;
+}
+
+uint8_t battery_millivolts_to_percent(uint32_t millivolts) {
+	float curBv = get_remaining_capacity((float) millivolts / 1000);
+	battery_apply_filter(&curBv);
+	return (uint8_t) (curBv + 0.5);
+} 	// Calculate input voltage in mV

samples/tmo_shell/src/tmo_adc.h

@@ -36,4 +36,6 @@ float get_remaining_capacity(float battery_voltage);
 bool is_battery_charging(void);
 int get_battery_charging_status(uint8_t *charging, uint8_t *vbus, uint8_t *attached, uint8_t *fault);
 
+void battery_apply_filter(float *bv);
+uint8_t battery_millivolts_to_percent(uint32_t millivolts);
 #endif