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hid_device: send demo text if no stdin available

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This commit is contained in:
Matthias Ringwald 2017-04-27 11:25:17 +02:00
parent ca44a803f1
commit 6518788a7f
1 changed files with 52 additions and 6 deletions
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58
example/hid_keyboard_demo.c
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@ -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: