Tinyusb HID example

1 files changed, 119 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
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+++ b/src/main.c
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+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bsp/board.h"
+#include "tusb.h"
+
+/* Blink pattern
+ * - 250 ms	: device not mounted
+ * - 1000 ms : device mounted
+ * - 2500 ms : device is suspended
+ */
+enum	{
+	BLINK_NOT_MOUNTED = 250,
+	BLINK_MOUNTED = 1000,
+	BLINK_SUSPENDED = 2500,
+};
+
+static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
+
+void led_blinking_task(void);
+
+/*------------- MAIN -------------*/
+int main(void)
+{
+	board_init();
+
+	// init device stack on configured roothub port
+	tud_init(BOARD_TUD_RHPORT);
+
+	while (1)
+	{
+		tud_task(); // tinyusb device task
+		led_blinking_task();
+	}
+
+	return 0;
+}
+
+//--------------------------------------------------------------------+
+// Device callbacks
+//--------------------------------------------------------------------+
+
+// Invoked when device is mounted
+void tud_mount_cb(void)
+{
+	blink_interval_ms = BLINK_MOUNTED;
+}
+
+// Invoked when device is unmounted
+void tud_umount_cb(void)
+{
+	blink_interval_ms = BLINK_NOT_MOUNTED;
+}
+
+// Invoked when usb bus is suspended
+// remote_wakeup_en : if host allow us	to perform remote wakeup
+// Within 7ms, device must draw an average of current less than 2.5 mA from bus
+void tud_suspend_cb(bool remote_wakeup_en)
+{
+	(void) remote_wakeup_en;
+	blink_interval_ms = BLINK_SUSPENDED;
+}
+
+// Invoked when usb bus is resumed
+void tud_resume_cb(void)
+{
+	blink_interval_ms = BLINK_MOUNTED;
+}
+
+//--------------------------------------------------------------------+
+// USB HID
+//--------------------------------------------------------------------+
+
+// Invoked when received GET_REPORT control request
+// Application must fill buffer report's content and return its length.
+// Return zero will cause the stack to STALL request
+uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id,
+	hid_report_type_t report_type, uint8_t* buffer, uint16_t reqlen)
+{
+	// TODO not Implemented
+	(void) itf;
+	(void) report_id;
+	(void) report_type;
+	(void) buffer;
+	(void) reqlen;
+
+	return 0;
+}
+
+// Invoked when received SET_REPORT control request or
+// received data on OUT endpoint ( Report ID = 0, Type = 0 )
+void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id,
+	hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize)
+{
+	// This example doesn't use multiple report and report ID
+	(void) itf;
+	(void) report_id;
+	(void) report_type;
+
+	// echo back anything we received from host
+	tud_hid_report(0, buffer, bufsize);
+}
+
+//--------------------------------------------------------------------+
+// BLINKING TASK
+//--------------------------------------------------------------------+
+void led_blinking_task(void)
+{
+	static uint32_t start_ms = 0;
+	static bool led_state = false;
+
+	// Blink every interval ms
+	if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
+	start_ms += blink_interval_ms;
+
+	board_led_write(led_state);
+	led_state = 1 - led_state; // toggle
+}