Refactor main and add LED

.github/memsize.baseline

@@ -1,2 +1,2 @@
    text	   data	    bss	    dec	    hex	filename
- 177729	  50704	 371141	 599574	  92616	build/template.elf
+ 181721	  51664	 371173	 604558	  9398e	build/template.elf

.gitignore

@@ -1 +1,2 @@
 build
+.cache

include/logging.h

@@ -0,0 +1,22 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@mononn.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef LOGGING_H
+#define LOGGING_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#include "libmcu/logging.h"
+
+void logging_stdout_backend_init(void);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* LOGGING_H */

include/pinmap.h

@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@mononn.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef PINMAP_H
+#define PINMAP_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#define PINMAP_LED			35
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* PINMAP_H */

ports/esp-idf/gpio.c

@@ -0,0 +1,100 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@libmcu.org>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "libmcu/gpio.h"
+#include "libmcu/compiler.h"
+
+#include <errno.h>
+
+#include "driver/gpio.h"
+#include "pinmap.h"
+
+struct gpio {
+	struct gpio_api api;
+
+	uint16_t pin;
+	gpio_callback_t callback;
+	void *callback_ctx;
+};
+
+static void set_output(uint16_t pin)
+{
+	gpio_config_t io_conf = {
+		.intr_type = GPIO_INTR_DISABLE,
+		.mode = GPIO_MODE_INPUT_OUTPUT,
+		.pin_bit_mask = (1ULL << pin),
+	};
+	gpio_config(&io_conf);
+}
+
+static int enable_gpio(struct gpio *self)
+{
+	switch (self->pin) {
+	case PINMAP_LED:
+		set_output(self->pin);
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	return 0;
+}
+
+static int disable_gpio(struct gpio *self)
+{
+	unused(self);
+	return 0;
+}
+
+static int set_gpio(struct gpio *self, int value)
+{
+	return gpio_set_level(self->pin, (uint32_t)value);
+}
+
+static int get_gpio(struct gpio *self)
+{
+	return gpio_get_level(self->pin);
+}
+
+static int register_callback(struct gpio *self,
+		gpio_callback_t cb, void *cb_ctx)
+{
+	self->callback = cb;
+	self->callback_ctx = cb_ctx;
+	return 0;
+}
+
+struct gpio *gpio_create(uint16_t pin)
+{
+	static struct gpio led;
+
+	struct gpio *p;
+
+	switch (pin) {
+	case PINMAP_LED:
+		p = &led;
+		break;
+	default:
+		return NULL;
+	}
+
+	p->pin = pin;
+
+	p->api = (struct gpio_api) {
+		.enable = enable_gpio,
+		.disable = disable_gpio,
+		.set = set_gpio,
+		.get = get_gpio,
+		.register_callback = register_callback,
+	};
+
+	return p;
+}
+
+void gpio_delete(struct gpio *self)
+{
+	unused(self);
+}

ports/esp-idf/start.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@mononn.com>
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@libmcu.org>
  *
  * SPDX-License-Identifier: MIT
  */

projects/external.cmake

@@ -5,4 +5,6 @@ target_compile_definitions(libmcu PUBLIC
 	_POSIX_C_SOURCE=200809L
 	LIBMCU_NOINIT=__attribute__\(\(section\(\".rtc.data.libmcu\"\)\)\)
 	METRICS_USER_DEFINES=\"${PROJECT_SOURCE_DIR}/include/metrics.def\"
+
+	${APP_DEFS}
 )

projects/sources.cmake

@@ -1,12 +1,12 @@
-set(fpl-src-dirs src)
-foreach(dir ${fpl-src-dirs})
-	file(GLOB_RECURSE fpl_${dir}_SRCS RELATIVE ${CMAKE_SOURCE_DIR} ${dir}/*.c)
-	file(GLOB_RECURSE fpl_${dir}_CPP_SRCS RELATIVE ${CMAKE_SOURCE_DIR} ${dir}/*.cpp)
-	list(APPEND FPL_SRCS ${fpl_${dir}_SRCS} ${fpl_${dir}_CPP_SRCS})
+set(src-dirs src)
+foreach(dir ${src-dirs})
+	file(GLOB_RECURSE ${dir}_SRCS RELATIVE ${CMAKE_SOURCE_DIR} ${dir}/*.c)
+	file(GLOB_RECURSE ${dir}_CPP_SRCS RELATIVE ${CMAKE_SOURCE_DIR} ${dir}/*.cpp)
+	list(APPEND SRCS_TMP ${${dir}_SRCS} ${${dir}_CPP_SRCS})
 endforeach()
 
 set(APP_SRCS
-	${CMAKE_SOURCE_DIR}/src/main.c
+	${SRCS_TMP}
 )
 set(APP_INCS
 	${CMAKE_SOURCE_DIR}/include

src/logging.c

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@mononn.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "logging.h"
+#include <stdio.h>
+
+static size_t logging_stdout_writer(const void *data, size_t size)
+{
+	unused(size);
+	static char buf[LOGGING_MESSAGE_MAXLEN];
+	size_t len = logging_stringify(buf, sizeof(buf)-1, data);
+
+	buf[len++] = '\n';
+	buf[len] = '\0';
+
+	const size_t rc = fwrite(buf, len, 1, stdout);
+
+	return rc == 0? len : 0;
+}
+
+void logging_stdout_backend_init(void)
+{
+	static struct logging_backend log_console = {
+		.write = logging_stdout_writer,
+	};
+
+	logging_add_backend(&log_console);
+}

src/main.c

@@ -1,51 +1,35 @@
 /*
- * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@mononn.com>
+ * SPDX-FileCopyrightText: 2023 Kyunghwan Kwon <k@libmcu.org>
  *
  * SPDX-License-Identifier: MIT
  */
 
-#include <stdio.h>
-
 #include "libmcu/board.h"
-#include "libmcu/logging.h"
-
-static size_t logging_stdout_writer(const void *data, size_t size)
-{
-	unused(size);
-	static char buf[LOGGING_MESSAGE_MAXLEN];
-	size_t len = logging_stringify(buf, sizeof(buf)-1, data);
-
-	buf[len++] = '\n';
-	buf[len] = '\0';
+#include "libmcu/timext.h"
+#include "libmcu/gpio.h"
 
-	const size_t rc = fwrite(buf, len, 1, stdout);
-
-	return rc == 0? len : 0;
-}
-
-static void logging_stdout_backend_init(void)
-{
-	static struct logging_backend log_console = {
-		.write = logging_stdout_writer,
-	};
-
-	logging_add_backend(&log_console);
-}
+#include "pinmap.h"
+#include "logging.h"
 
 int main(void)
 {
 	board_init(); /* should be called very first. */
-	logging_init(board_get_time_since_boot_ms);
 
+	logging_init(board_get_time_since_boot_ms);
 	logging_stdout_backend_init();
 
 	const board_reboot_reason_t reboot_reason = board_get_reboot_reason();
-
 	info("[%s] %s %s", board_get_reboot_reason_string(reboot_reason),
 			board_get_serial_number_string(),
 			board_get_version_string());
 
+	struct gpio *led = gpio_create(PINMAP_LED);
+	gpio_enable(led);
+
 	while (1) {
-		/* hang */
+		gpio_set(led, gpio_get(led) ^ 1);
+		sleep_ms(500);
 	}
+
+	return 0;
 }