crude first version of main part

CMakeLists.txt

@@ -1,2 +1,4 @@
 # Copyright (c) 2024 PM
 # SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory(drivers)

Kconfig

@@ -5,5 +5,5 @@
 # as the module Kconfig entry point (see zephyr/module.yml). You can browse
 # module options by going to Zephyr -> Modules in Kconfig.
 
-# rsource "drivers/Kconfig"
+rsource "drivers/Kconfig"
 # rsource "lib/Kconfig"

app/prj.conf

@@ -10,6 +10,9 @@ CONFIG_I2C_SHELL=y
 CONFIG_INPUT_SHELL=y
 CONFIG_LV_Z_SHELL=y
 
+CONFIG_SENSOR_SHELL=y
+# CONFIG_SENSOR_SHELL_BATTERY=y
+
 # LVGL
 CONFIG_LVGL=y
 CONFIG_LV_COLOR_DEPTH_32=y

app/src/main.c

@@ -12,11 +12,14 @@
 #include <lvgl_input_device.h>
 
 #include <zephyr/drivers/display.h>
+#include <zephyr/drivers/sensor.h>
 #include <zephyr/input/input.h>
 #include <zephyr/random/random.h>
 
 #include <zephyr/logging/log.h>
 
+#include "../../drivers/sensor/mlx90640/mlx90640.h"
+
 LOG_MODULE_REGISTER(main, CONFIG_APP_LOG_LEVEL);
 
 int main(void)
@@ -26,6 +29,7 @@ int main(void)
 
     char count_str[11] = {0};
     const struct device *display_dev;
+    const struct device *ir_dev;
 
     display_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display));
     if (!device_is_ready(display_dev))
@@ -47,33 +51,64 @@ int main(void)
     lv_obj_t *ir_image = lv_canvas_create(lv_scr_act());
     lv_canvas_set_buffer(ir_image, cbuf, 32, 24, LV_IMG_CF_TRUE_COLOR);
 
-    lv_canvas_fill_bg(ir_image, lv_color_make(0x40,0x40,0x40), LV_OPA_COVER);
+    lv_canvas_fill_bg(ir_image, lv_color_make(0x40, 0x40, 0x40), LV_OPA_COVER);
 
     lv_obj_set_size(ir_image, 32, 24);
     lv_obj_align(ir_image, LV_ALIGN_TOP_LEFT, 4, 4);
     lv_img_set_pivot(ir_image, 0, 0);
-    lv_img_set_zoom(ir_image, 256 * 8);
+    // lv_img_set_zoom(ir_image, 256 * 2);
+    lv_img_set_zoom(ir_image, 256 * 12);
     lv_img_set_antialias(ir_image, false);
 
     lv_timer_handler();
     display_blanking_off(display_dev);
 
+    ir_dev = DEVICE_DT_GET(DT_NODELABEL(mlx90640_mlx90640_elecrow_i2c));
+    if (!device_is_ready(ir_dev))
+    {
+        printf("Device %s not ready\n", ir_dev->name);
+        return 0;
+    }
+
     lv_color32_t color;
+    float *temps = ((struct mlx90640_data *)ir_dev->data)->temps;
+    int64_t reftime = k_uptime_get();
     while (1)
     {
+        sensor_sample_fetch(ir_dev);
+        mlx90640_calculate_to(ir_dev, 0.8, ((struct mlx90640_data *)ir_dev->data)->ta - 8.0f); // Tr = Ta - 8.0 from PDF
+
         for (int y = 0; y < 24; y++)
         {
             for (int x = 0; x < 32; x++)
             {
-                color.ch.red = (color.ch.red + 11) % 255;
-                color.ch.green = (color.ch.green + 17) % 255;
-                color.ch.blue = (color.ch.blue + 13) % 255;
+                if (temps[y * 32 + x] < 0)
+                {
+                    color = lv_color_black();
+                }
+                else if (temps[y * 32 + x] > 64)
+                {
+                    color = lv_color_white();
+                }
+                else
+                {
+                    color.ch.red = (uint8_t)(temps[y * 32 + x] * 4);
+                    color.ch.green = color.ch.red;
+                    color.ch.blue = color.ch.red;
+                }
                 lv_canvas_set_px_color(ir_image, x, y, color);
             }
         }
 
-        int delay = lv_timer_handler_run_in_period(100);
-        k_msleep(delay);
+        lv_timer_handler();
+
+        int64_t elapsed = k_uptime_delta(&reftime);
+        printf("took %d ms", (uint32_t)elapsed);
+
+        if (elapsed < 100)
+        {
+            k_msleep(100 - elapsed);
+        }
     }
 
     return 0;

boards/shields/mlx90640_elecrow_i2c/Kconfig.defconfig

@@ -0,0 +1,12 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+if SHIELD_MLX90640_ELECROW_I2C
+
+config SENSOR
+	default y
+
+config MLX90640
+	default y
+
+endif # SHIELD_MLX90640_ELECROW_I2C

boards/shields/mlx90640_elecrow_i2c/Kconfig.shield

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 PM
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config SHIELD_MLX90640_ELECROW_I2C
+	def_bool $(shields_list_contains,mlx90640_elecrow_i2c)

boards/shields/mlx90640_elecrow_i2c/mlx90640_elecrow_i2c.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024 PM
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+ &i2c0 {
+	status = "okay";
+
+	mlx90640_mlx90640_elecrow_i2c: mlx90640@33 {
+		compatible = "melexis,mlx90640";
+		reg = <0x33>;
+		status = "okay";
+	};
+};

boards/xtensa/elecrow_esp_terminal/elecrow_esp_terminal.dts

@@ -82,7 +82,7 @@
 };
 
 &i2c0 {
-	clock-frequency = <I2C_BITRATE_STANDARD>;
+	clock-frequency = <I2C_BITRATE_FAST>;
 	pinctrl-0 = <&i2c0_default>;
 	pinctrl-names = "default";
 	status = "okay";

boards/xtensa/elecrow_esp_terminal/elecrow_esp_terminal_defconfig

@@ -4,7 +4,8 @@
 CONFIG_BOARD_ELECROW_ESP_TERMINAL=y
 CONFIG_SOC_SERIES_ESP32S3=y
 
-CONFIG_MAIN_STACK_SIZE=8192 # increased for LVGL
+# increased for LVGL
+CONFIG_MAIN_STACK_SIZE=8192
 
 CONFIG_CONSOLE=y
 CONFIG_SERIAL=y

drivers/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory_ifdef(CONFIG_SENSOR sensor)

drivers/Kconfig

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+menu "Drivers"
+    rsource "sensor/Kconfig"
+endmenu

drivers/sensor/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory_ifdef(CONFIG_MLX90640 mlx90640)

drivers/sensor/Kconfig

@@ -0,0 +1,6 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+if SENSOR
+    rsource "mlx90640/Kconfig"
+endif # SENSOR

drivers/sensor/mlx90640/CMakeLists.txt

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(mlx90640.c)
+# zephyr_library_sources_ifdef(CONFIG_MLX90640_TRIGGER mlx90640_trigger.c)
+# zephyr_library_sources(vendor/functions/MLX90640.c)

drivers/sensor/mlx90640/Kconfig

@@ -0,0 +1,55 @@
+# MLX90640 infrared thermopile sensor configuration options
+
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+# menuconfig MLX90640
+config MLX90640
+	bool "MLX90640 Infrared Thermopile Sensor"
+	default y
+	depends on DT_HAS_MELEXIS_MLX90640_ENABLED
+	select I2C
+	help
+	  Enable driver for MLX90640 infrared thermopile sensor.
+
+# if MLX90640
+
+# choice
+# 	prompt "Trigger mode"
+# 	default MLX90640_TRIGGER_NONE
+# 	help
+# 	  Specify the type of triggering used by the driver.
+
+# config MLX90640_TRIGGER_NONE
+# 	bool "No trigger"
+
+# config MLX90640_TRIGGER_GLOBAL_THREAD
+# 	bool "Use global thread"
+# 	depends on GPIO
+# 	select MLX90640_TRIGGER
+
+# config MLX90640_TRIGGER_OWN_THREAD
+# 	bool "Use own thread"
+# 	depends on GPIO
+# 	select MLX90640_TRIGGER
+
+# endchoice
+
+# config MLX90640_TRIGGER
+# 	bool
+
+# config MLX90640_THREAD_PRIORITY
+# 	int "Thread priority"
+# 	depends on MLX90640_TRIGGER_OWN_THREAD
+# 	default 10
+# 	help
+# 	  Priority of thread used by the driver to handle interrupts.
+
+# config MLX90640_THREAD_STACK_SIZE
+# 	int "Thread stack size"
+# 	depends on MLX90640_TRIGGER_OWN_THREAD
+# 	default 1024
+# 	help
+# 	  Stack size of thread used by the driver to handle interrupts.
+
+# endif # MLX90640

drivers/sensor/mlx90640/mlx90640.h

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2024 PM
+ *
+ * using code from Melexis https://github.com/melexis/mlx90640-library,
+ * commit f6be7ca1d4a55146b705f3d347f84b773b29cc86 under Apache-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_DRIVERS_SENSOR_MLX90640_MLX90640_H_
+#define ZEPHYR_DRIVERS_SENSOR_MLX90640_MLX90640_H_
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/i2c.h>
+#include <zephyr/sys/util.h>
+
+typedef struct
+{
+    int16_t kVdd;
+    int16_t vdd25;
+    float KvPTAT;
+    float KtPTAT;
+    uint16_t vPTAT25;
+    float alphaPTAT;
+    int16_t gainEE;
+    float tgc;
+    float cpKv;
+    float cpKta;
+    uint8_t resolutionEE;
+    uint8_t calibrationModeEE;
+    float KsTa;
+    float ksTo[5];
+    int16_t ct[5];
+    uint16_t alpha[768];
+    uint8_t alphaScale;
+    int16_t offset[768];
+    int8_t kta[768];
+    uint8_t ktaScale;
+    int8_t kv[768];
+    uint8_t kvScale;
+    float cpAlpha[2];
+    int16_t cpOffset[2];
+    float ilChessC[3];
+    uint16_t brokenPixels[5];
+    uint16_t outlierPixels[5];
+} mlx90640_params;
+
+enum mlx90640_refresh_rate
+{
+    MLX90640_REFRESH_0_5 = 0,
+    MLX90640_REFRESH_1 = 1,
+    MLX90640_REFRESH_2 = 2,
+    MLX90640_REFRESH_4 = 3,
+    MLX90640_REFRESH_8 = 4,
+    MLX90640_REFRESH_16 = 5,
+    MLX90640_REFRESH_32 = 6,
+    MLX90640_REFRESH_64 = 7,
+};
+
+enum mlx90640_adc_resolution
+{
+    MLX90640_ADC_RES_16 = 0,
+    MLX90640_ADC_RES_17 = 1,
+    MLX90640_ADC_RES_18 = 2,
+    MLX90640_ADC_RES_19 = 3,
+};
+
+enum mlx90640_reading_pattern
+{
+    MLX90640_PATTERN_INTERLEAVED = 0,
+    MLX90640_PATTERN_CHESS = 1,
+};
+
+struct mlx90640_config
+{
+    const struct i2c_dt_spec i2c;
+    const enum mlx90640_refresh_rate refresh_rate;
+    const enum mlx90640_adc_resolution adc_resolution;
+    const enum mlx90640_reading_pattern reading_pattern;
+};
+
+struct mlx90640_data
+{
+    float temps[768];
+	float vdd;
+	float ta;
+    uint16_t raw_data[833]; // 768 px + 64 metadata + 1 status
+    mlx90640_params params;
+
+#ifdef CONFIG_MLX90640_TRIGGER
+    const struct device *dev;
+    struct gpio_callback gpio_cb;
+
+    sensor_trigger_handler_t drdy_handler;
+    const struct sensor_trigger *drdy_trigger;
+
+    sensor_trigger_handler_t th_handler;
+    const struct sensor_trigger *th_trigger;
+
+#if defined(CONFIG_MLX90640_TRIGGER_OWN_THREAD)
+    K_KERNEL_STACK_MEMBER(thread_stack, CONFIG_MLX90640_THREAD_STACK_SIZE);
+    struct k_sem gpio_sem;
+    struct k_thread thread;
+#elif defined(CONFIG_MLX90640_TRIGGER_GLOBAL_THREAD)
+    struct k_work work;
+#endif
+
+#endif /* CONFIG_MLX90640_TRIGGER */
+};
+
+#ifdef CONFIG_MLX90640_TRIGGER
+int mlx90640_attr_set(const struct device *dev, enum sensor_channel chan, enum sensor_attribute attr,
+                      const struct sensor_value *val);
+
+int mlx90640_trigger_set(const struct device *dev, const struct sensor_trigger *trig, sensor_trigger_handler_t handler);
+
+int mlx90640_init_interrupt(const struct device *dev);
+#endif /* CONFIG_MLX90640_TRIGGER */
+
+// data
+int mlx90640_synch_frame(const struct device *dev);
+int mlx90640_trigger_measurement(const struct device *dev);
+int mlx90640_get_frame_data(const struct device *dev);
+
+// process
+float mlx90640_get_vdd(const struct device *dev);
+float mlx90640_get_ta(const struct device *dev);
+
+// void mlx90640_get_image(const struct device *dev);
+// or!
+void mlx90640_calculate_to(const struct device *dev, float emissivity, float tr);
+
+// optional /
+void mlx90640_bad_pixels_correction(const struct device *dev, int mode);
+
+int mlx90640_set_adc_resolution(const struct device *dev, enum mlx90640_adc_resolution res);
+enum mlx90640_adc_resolution mlx90640_get_adc_resolution(const struct device *dev);
+
+int mlx90640_set_refresh_rate(const struct device *dev, enum mlx90640_refresh_rate res);
+enum mlx90640_refresh_rate mlx90640_get_refresh_rate(const struct device *dev);
+
+int mlx90640_set_reading_pattern(const struct device *dev, enum mlx90640_reading_pattern res);
+enum mlx90640_reading_pattern mlx90640_get_reading_pattern(const struct device *dev);
+
+#endif

drivers/sensor/mlx90640/mlx90640_trigger.c

@@ -0,0 +1,213 @@
+/*
+ * Copyright (c) 2017-2019 Phytec Messtechnik GmbH
+ * Copyright (c) 2017 Benedict Ohl (Benedict-Ohl@web.de)
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/i2c.h>
+#include <zephyr/sys/util.h>
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/sensor.h>
+#include "amg88xx.h"
+
+extern struct amg88xx_data amg88xx_driver;
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_DECLARE(AMG88XX, CONFIG_SENSOR_LOG_LEVEL);
+
+static inline void amg88xx_setup_int(const struct amg88xx_config *cfg,
+				     bool enable)
+{
+	unsigned int flags = enable
+		? GPIO_INT_EDGE_TO_ACTIVE
+		: GPIO_INT_DISABLE;
+
+	gpio_pin_interrupt_configure_dt(&cfg->int_gpio, flags);
+}
+
+int amg88xx_attr_set(const struct device *dev,
+		     enum sensor_channel chan,
+		     enum sensor_attribute attr,
+		     const struct sensor_value *val)
+{
+	const struct amg88xx_config *config = dev->config;
+	int16_t int_level = (val->val1 * 1000000 + val->val2) /
+			  AMG88XX_TREG_LSB_SCALING;
+	uint8_t intl_reg;
+	uint8_t inth_reg;
+
+	if (!config->int_gpio.port) {
+		return -ENOTSUP;
+	}
+
+	if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
+		return -ENOTSUP;
+	}
+
+	LOG_DBG("set threshold to %d", int_level);
+
+	if (attr == SENSOR_ATTR_UPPER_THRESH) {
+		intl_reg = AMG88XX_INTHL;
+		inth_reg = AMG88XX_INTHH;
+	} else if (attr == SENSOR_ATTR_LOWER_THRESH) {
+		intl_reg = AMG88XX_INTLL;
+		inth_reg = AMG88XX_INTLH;
+	} else {
+		return -ENOTSUP;
+	}
+
+	if (i2c_reg_write_byte_dt(&config->i2c,
+			       intl_reg, (uint8_t)int_level)) {
+		LOG_DBG("Failed to set INTxL attribute!");
+		return -EIO;
+	}
+
+	if (i2c_reg_write_byte_dt(&config->i2c,
+			       inth_reg, (uint8_t)(int_level >> 8))) {
+		LOG_DBG("Failed to set INTxH attribute!");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static void amg88xx_gpio_callback(const struct device *dev,
+				  struct gpio_callback *cb, uint32_t pins)
+{
+	struct amg88xx_data *drv_data =
+		CONTAINER_OF(cb, struct amg88xx_data, gpio_cb);
+	const struct amg88xx_config *config = drv_data->dev->config;
+
+	amg88xx_setup_int(config, false);
+
+#if defined(CONFIG_AMG88XX_TRIGGER_OWN_THREAD)
+	k_sem_give(&drv_data->gpio_sem);
+#elif defined(CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD)
+	k_work_submit(&drv_data->work);
+#endif
+}
+
+static void amg88xx_thread_cb(const struct device *dev)
+{
+	struct amg88xx_data *drv_data = dev->data;
+	const struct amg88xx_config *config = dev->config;
+	uint8_t status;
+
+	if (i2c_reg_read_byte_dt(&config->i2c,
+			      AMG88XX_STAT, &status) < 0) {
+		return;
+	}
+
+	if (drv_data->drdy_handler != NULL) {
+		drv_data->drdy_handler(dev, drv_data->drdy_trigger);
+	}
+
+	if (drv_data->th_handler != NULL) {
+		drv_data->th_handler(dev, drv_data->th_trigger);
+	}
+
+	amg88xx_setup_int(config, true);
+}
+
+#ifdef CONFIG_AMG88XX_TRIGGER_OWN_THREAD
+static void amg88xx_thread(void *p1, void *p2, void *p3)
+{
+	ARG_UNUSED(p2);
+	ARG_UNUSED(p3);
+
+	struct amg88xx_data *drv_data = p1;
+
+	while (42) {
+		k_sem_take(&drv_data->gpio_sem, K_FOREVER);
+		amg88xx_thread_cb(drv_data->dev);
+	}
+}
+#endif
+
+#ifdef CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD
+static void amg88xx_work_cb(struct k_work *work)
+{
+	struct amg88xx_data *drv_data =
+		CONTAINER_OF(work, struct amg88xx_data, work);
+	amg88xx_thread_cb(drv_data->dev);
+}
+#endif
+
+int amg88xx_trigger_set(const struct device *dev,
+			const struct sensor_trigger *trig,
+			sensor_trigger_handler_t handler)
+{
+	struct amg88xx_data *drv_data = dev->data;
+	const struct amg88xx_config *config = dev->config;
+
+	if (!config->int_gpio.port) {
+		return -ENOTSUP;
+	}
+
+	if (i2c_reg_write_byte_dt(&config->i2c,
+			       AMG88XX_INTC, AMG88XX_INTC_DISABLED)) {
+		return -EIO;
+	}
+
+	amg88xx_setup_int(config, false);
+
+	if (trig->type == SENSOR_TRIG_THRESHOLD) {
+		drv_data->th_handler = handler;
+		drv_data->th_trigger = trig;
+	} else {
+		LOG_ERR("Unsupported sensor trigger");
+		return -ENOTSUP;
+	}
+
+	amg88xx_setup_int(config, true);
+
+	if (i2c_reg_write_byte_dt(&config->i2c,
+			       AMG88XX_INTC, AMG88XX_INTC_ABS_MODE)) {
+		return -EIO;
+	}
+
+	return 0;
+}
+
+int amg88xx_init_interrupt(const struct device *dev)
+{
+	struct amg88xx_data *drv_data = dev->data;
+	const struct amg88xx_config *config = dev->config;
+
+	if (!gpio_is_ready_dt(&config->int_gpio)) {
+		LOG_ERR("%s: device %s is not ready", dev->name,
+				config->int_gpio.port->name);
+		return -ENODEV;
+	}
+
+	gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT | config->int_gpio.dt_flags);
+
+	gpio_init_callback(&drv_data->gpio_cb,
+			   amg88xx_gpio_callback,
+			   BIT(config->int_gpio.pin));
+
+	if (gpio_add_callback(config->int_gpio.port, &drv_data->gpio_cb) < 0) {
+		LOG_DBG("Failed to set gpio callback!");
+		return -EIO;
+	}
+
+	drv_data->dev = dev;
+
+#if defined(CONFIG_AMG88XX_TRIGGER_OWN_THREAD)
+	k_sem_init(&drv_data->gpio_sem, 0, K_SEM_MAX_LIMIT);
+
+	k_thread_create(&drv_data->thread, drv_data->thread_stack,
+			CONFIG_AMG88XX_THREAD_STACK_SIZE,
+			amg88xx_thread, drv_data,
+			NULL, NULL, K_PRIO_COOP(CONFIG_AMG88XX_THREAD_PRIORITY),
+			0, K_NO_WAIT);
+#elif defined(CONFIG_AMG88XX_TRIGGER_GLOBAL_THREAD)
+	drv_data->work.handler = amg88xx_work_cb;
+#endif
+	amg88xx_setup_int(config, true);
+
+	return 0;
+}

dts/bindings/sensor/melexis,mlx90640.yaml

@@ -0,0 +1,48 @@
+# Copyright (c) 2024 PM
+# SPDX-License-Identifier: Apache-2.0
+
+description: Melexis MLX90640 32x24 (768) pixel infrared array sensor
+
+compatible: "melexis,mlx90640"
+
+include: [sensor-device.yaml, i2c-device.yaml]
+
+properties:
+  refresh-rate:
+    type: int
+    default: 2
+    enum:
+      - 0 # 0.5HZ
+      - 1 # 1HZ
+      - 2 # 2HZ
+      - 3 # 4HZ
+      - 4 # 8HZ
+      - 5 # 16HZ
+      - 6 # 32HZ
+      - 7 # 64HZ
+    description:
+      Refresh rate of the sensor itself.
+      The I2C must be configured to keep up with the data flow.
+      This configures the rate for subfields, i.e. the full frame rate is half of this value.
+
+  adc-resolution:
+    type: int
+    default: 2
+    enum:
+      - 0 # 16BIT
+      - 1 # 17BIT
+      - 2 # 18BIT
+      - 3 # 19BIT
+    description:
+      ADC resolution.
+
+  reading-pattern:
+    type: int
+    default: 1
+    enum:
+      - 0 # CHESS
+      - 1 # INTERLEAVE
+    description:
+      Reading pattern.
+      The sensor can be read in either line-interleaved subfields (similar to a TV video) 
+      or a pixel alternating "chess board" pattern.