sensors/mi48: add support for mi48 thermal camera

os/board/rtl8721csm/src/Make.defs

@@ -51,3 +51,6 @@
 
 CSRCS += rtl8721csm_boot.c
 CSRCS += rtl8721csm_i2schar.c
+ifeq ($(CONFIG_MI48),y)
+CSRCS += rtl8721csm_mi48.c
+endif

os/board/rtl8721csm/src/rtl8721csm_boot.c

@@ -313,9 +313,10 @@ void board_initialize(void)
 	ipc_table_init();
 	amebad_mount_partions();
 	board_gpio_initialize();
-	board_i2c_initialize();
-	board_spi_initialize();
+//	board_i2c_initialize();
+//	board_spi_initialize();
 	board_i2s_initialize();
+	rtl8721csm_mi48_initialize();
 #ifdef CONFIG_WATCHDOG
 	amebad_wdg_initialize(CONFIG_WATCHDOG_DEVPATH, 5000);
 #endif

os/board/rtl8721csm/src/rtl8721csm_mi48.c

@@ -0,0 +1,189 @@
+/****************************************************************************
+ *
+ * Copyright 2023 Samsung Electronics All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+#include <tinyara/config.h>
+#include <tinyara/irq.h>
+#include <tinyara/sensors/mi48.h>
+#include <debug.h>
+#include <errno.h>
+#include "gpio_api.h"
+#include "gpio_irq_api.h"
+
+#ifdef CONFIG_MI48
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+#define DEVNAME_FORMAT	"/dev/img%d"
+
+#define GPIO_RESET		PB_2	// will set it to the right pin after wards
+#define GPIO_DATA_READY		PA_19
+
+#define GPIO_UNSET		0
+#define GPIO_SET		1
+
+/* i2c config */
+#define MI48_I2C_PORT        	0
+#define MI48_I2C_FREQ        	100000
+#define MI48_I2C_ADDRLEN     	7
+
+#define MI48_I2C_ADDR_H         0x41 /* need to set correct address */
+#define MI48_I2C_ADDR_L         0x40
+
+/* spi config */
+#define MI48_SPI_PORT		0
+#define MI48_SPI_FREQ		1000000
+#define MI48_SPI_BPW		16
+#define MI48_SPI_CS		0
+#define MI48_SPI_MODE		SPIDEV_MODE1
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct rtl8721csm_gpio_info_s {
+	gpio_t reset;
+	gpio_irq_t data_ready;
+};
+
+struct rtl8721csm_mi48_dev_s {
+	/* Lower level mi48 dev */
+	struct mi48_lower_s lower;
+
+	/* board specific gpio information */
+	struct rtl8721csm_gpio_info_s gpio_info;
+
+	/* gpio interrupt handler */
+	mi48_handler_t handler;
+};
+
+static int rtl8721csm_mi48_gpio_reset(struct mi48_lower_s *lower);
+static int rtl8721csm_mi48_gpio_irq_attach(struct mi48_lower_s *lower, mi48_handler_t handler, FAR char *arg);
+static int rtl8721csm_mi48_gpio_irq_enable(struct mi48_lower_s *lower, int enable);
+
+static struct rtl8721csm_mi48_dev_s g_rtl8721csm_dev = {
+	.lower = {
+		.reset = rtl8721csm_mi48_gpio_reset,
+		.attach = rtl8721csm_mi48_gpio_irq_attach,
+		.enable = rtl8721csm_mi48_gpio_irq_enable,
+		.i2c_config = {
+			.frequency = MI48_I2C_FREQ,
+			.address = MI48_I2C_ADDR_L,
+			.addrlen = MI48_I2C_ADDRLEN,
+		},
+		.spi_config = {
+			.bpw = MI48_SPI_BPW,
+			.freq = MI48_SPI_FREQ,
+			.cs = MI48_SPI_CS,
+			.mode = MI48_SPI_MODE,
+		},
+	},
+	.gpio_info = {
+		.reset.pin = GPIO_RESET,
+	},
+	.handler = NULL
+
+};
+
+/****************************************************************************
+ * Private Functions Prototype
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int rtl8721csm_mi48_gpio_reset(struct mi48_lower_s *lower)
+{
+	gpio_write(&(g_rtl8721csm_dev.gpio_info.reset), GPIO_UNSET);
+	HAL_Delay(100);
+	gpio_write(&(g_rtl8721csm_dev.gpio_info.reset), GPIO_SET);
+	HAL_Delay(1000);
+	return OK;
+}
+
+static void rtl8721csm_gpio_irq_handler(uint32_t id, gpio_irq_event event)
+{
+	if (g_rtl8721csm_dev.handler) {
+		g_rtl8721csm_dev.handler((void *)id);
+	}
+}
+
+static int rtl8721csm_mi48_gpio_irq_attach(struct mi48_lower_s *lower, mi48_handler_t handler, FAR char *arg)
+{
+	g_rtl8721csm_dev.handler = handler;
+	return OK;
+}
+
+static int rtl8721csm_mi48_gpio_irq_enable(struct mi48_lower_s *lower, int enable)
+{
+	if (enable) {
+		gpio_irq_enable(&(g_rtl8721csm_dev.gpio_info.data_ready));
+	} else {
+		gpio_irq_disable(&(g_rtl8721csm_dev.gpio_info.data_ready));
+	}
+	return OK;
+}
+
+int rtl8721csm_mi48_initialize(void)
+{
+	int result = 0;
+	FAR struct i2c_dev_s *i2c;
+	FAR struct spi_dev_s *spi;
+	char devpath[32];
+
+	gpio_irq_init(&(g_rtl8721csm_dev.gpio_info.data_ready), GPIO_DATA_READY, rtl8721csm_gpio_irq_handler, 1);
+	gpio_irq_set(&(g_rtl8721csm_dev.gpio_info.data_ready), IRQ_RISE, 1); // Rising edge trigger	
+
+	i2c = up_i2cinitialize(MI48_I2C_PORT);
+	if (!i2c) {
+		result = -ENODEV;
+		goto done;
+	}
+
+        spi = up_spiinitialize(1);
+	if (!i2c) {
+		result = -ENODEV;
+		goto done;
+	}
+
+	/* register mi48 driver */
+	snprintf(devpath, sizeof(devpath), DEVNAME_FORMAT, 0);
+	if (mi48_register(devpath, &g_rtl8721csm_dev.lower, i2c, spi) != 0) {
+		goto done;
+	}
+
+	/* result is success */
+	result = 0;
+
+done:
+	return result;
+}
+
+#endif							/* CONFIG_MI48 */

os/drivers/sensors/Kconfig

@@ -24,3 +24,10 @@ config SENSOR_PPD42NS_DEBUG
 		enable PPD42ns dust sensor driver's debug message
 
 endif # SENSOR_PPD42NS
+
+config MI48
+        bool "mi48 thermal imaging sensor"
+        depends on I2C && SPI
+        default n
+	---help---
+		enable mi48 thermal imaging sensor

os/drivers/sensors/Make.defs

@@ -23,6 +23,10 @@ ifeq ($(CONFIG_SENSOR_PPD42NS),y)
   CSRCS += ppd42ns.c
 endif
 
+ifeq ($(CONFIG_MI48),y)
+  CSRCS += mi48.c
+endif
+
 # Include sensor build support
 
 DEPPATH += --dep-path sensors