From 6518788a7f581e9f851e34d4cc0f6002e911bbce Mon Sep 17 00:00:00 2001
From: Matthias Ringwald <matthias@ringwald.ch>
Date: Thu, 27 Apr 2017 11:25:17 +0200
Subject: [PATCH] hid_device: send demo text if no stdin available
---
example/hid_keyboard_demo.c | 58 +++++++++++++++++++++++++++++++++----
1 file changed, 52 insertions(+), 6 deletions(-)
diff --git a/example/hid_keyboard_demo.c b/example/hid_keyboard_demo.c
index 24120209b..8f0609bf2 100644
--- a/example/hid_keyboard_demo.c
+++ b/example/hid_keyboard_demo.c
@@ -41,8 +41,8 @@
/* EXAMPLE_START(hid_device_demo): HID Device (Server) Demo
*
* @text This HID Device example demonstrates how to implement
- * an HID keyboard. Without a HAVE_POSIX_STDIN, a fixed message is sent
- * If HAVE_POSIX_STDIN is defined, you can control and type from the terminal
+ * an HID keyboard. Without a HAVE_POSIX_STDIN, a fixed demo text is sent
+ * If HAVE_POSIX_STDIN is defined, you can type from the terminal
*/
// *****************************************************************************
@@ -55,6 +55,9 @@
#include <inttypes.h>
#include "btstack.h"
+
+#undef HAVE_POSIX_STDIN
+
#ifdef HAVE_POSIX_STDIN
#include "stdin_support.h"
#endif
@@ -347,7 +350,9 @@ static void send_report(int modifier, int keycode){
l2cap_send(hid_interrupt_cid, &report[0], sizeof(report));
}
-
+static int hid_connected(void){
+ return hid_control_cid && hid_interrupt_cid;
+}
#ifdef HAVE_POSIX_STDIN
@@ -381,12 +386,50 @@ static void stdin_process(btstack_data_source_t *ds, btstack_data_source_callbac
}
show_usage();
}
-#endif
+#else
-static int hid_connected(void){
- return hid_control_cid && hid_interrupt_cid;
+// On embedded systems, send constant demo text with fixed period
+
+#define TYPING_PERIOD_MS 100
+static const char * demo_text = "\n\nHello World!\n\nThis is the BTstack HID Keyboard Demo running on an Embedded Device.\n\n";
+
+static int demo_pos;
+static btstack_timer_source_t typing_timer;
+
+static void typing_timer_handler(btstack_timer_source_t * ts){
+
+ // abort if not connected
+ if (!hid_connected()) return;
+
+ // get next character
+ uint8_t character = demo_text[demo_pos++];
+ if (demo_text[demo_pos] == 0){
+ demo_pos = 0;
+ }
+
+ // get keycodeand send
+ uint8_t modifier;
+ uint8_t keycode;
+ int found = keycode_and_modifer_us_for_character(character, &keycode, &modifier);
+ if (found){
+ send_key(modifier, keycode);
+ }
+
+ // set next timer
+ btstack_run_loop_set_timer(ts, TYPING_PERIOD_MS);
+ btstack_run_loop_add_timer(ts);
}
+static void hid_start_typing(void){
+ demo_pos = 0;
+ // set one-shot timer
+ typing_timer.process = &typing_timer_handler;
+ btstack_run_loop_set_timer(&typing_timer, TYPING_PERIOD_MS);
+ btstack_run_loop_add_timer(&typing_timer);
+}
+
+#endif
+
static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t packet_size){
UNUSED(channel);
UNUSED(packet_size);
@@ -429,6 +472,9 @@ static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * pack
}
if (!connected_before && hid_connected()){
printf("HID Connected\n");
+#ifndef HAVE_POSIX_STDIN
+ hid_start_typing();
+#endif
}
break;
case L2CAP_EVENT_CHANNEL_CLOSED: