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gatt-service/hids_device: handle read/write of Boot Keyboard Output characteristic

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This commit is contained in:
Matthias Ringwald 2023-09-19 11:48:05 +02:00
parent bbf45f896f
commit f5fc5029c6
1 changed files with 37 additions and 26 deletions
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63
src/ble/gatt-service/hids_device.c
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@ -191,6 +191,28 @@ static void hids_device_emit_event(uint8_t event, hci_con_handle_t con_handle){
(*packet_handler)(HCI_EVENT_PACKET, 0, buffer, sizeof(buffer));
}
static void hids_device_emit_report(hci_con_handle_t con_handle, const uint8_t report_id, const uint8_t report_type,
const uint8_t *buffer, uint16_t buffer_size) {
// assemble event in buffer
uint8_t event[257];
uint16_t pos = 0;
event[pos++] = HCI_EVENT_HIDS_META;
// skip length
pos++;
event[pos++] = HIDS_SUBEVENT_SET_REPORT;
little_endian_store_16(event, pos, con_handle);
pos += 2;
event[pos++] = report_id;
event[pos++] = report_type;
uint8_t length_to_copy = btstack_min(buffer_size, 250);
event[pos++] = length_to_copy;
memcpy(&event[pos], buffer, length_to_copy);
pos += length_to_copy;
// set event length
event[1] = pos - 2;
(*packet_handler)(HCI_EVENT_PACKET, 0, event, pos);
}
static void hids_device_can_send_now(void * context){
hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) context;
// notify client
@ -244,19 +266,25 @@ static uint16_t att_read_callback(hci_con_handle_t con_handle, uint16_t att_hand
return 1;
}
if (att_handle == instance->hid_boot_keyboard_output_value_handle){
// TODO
return 0;
}
uint8_t boot_report_size = 0;
// avoid "value unused" warning by smart compiler
// not so smart compiler will complain that value is used without initialization
UNUSED(boot_report_size);
uint8_t boot_report_id = 0;
hid_report_type_t boot_report_type = HID_REPORT_TYPE_RESERVED;
if (att_handle == instance->hid_boot_mouse_input_value_handle){
boot_report_type = HID_REPORT_TYPE_INPUT;
boot_report_size = 3;
}
if (att_handle == instance->hid_boot_keyboard_input_value_handle){
boot_report_type = HID_REPORT_TYPE_INPUT;
boot_report_size = 8;
}
if (boot_report_size != 0){
if (att_handle == instance->hid_boot_keyboard_output_value_handle){
boot_report_type = HID_REPORT_TYPE_OUTPUT;
boot_report_size = 1;
}
if (boot_report_type != HID_REPORT_TYPE_RESERVED){
// no callback, no report
if (hids_device_get_report_callback == NULL){
return 0;
@ -266,7 +294,7 @@ static uint16_t att_read_callback(hci_con_handle_t con_handle, uint16_t att_hand
return boot_report_size;
} else {
// Report ID 0, Type Input
(*hids_device_get_report_callback)(con_handle, HID_REPORT_TYPE_INPUT, 0, boot_report_size, buffer);
(*hids_device_get_report_callback)(con_handle, boot_report_type, boot_report_id, boot_report_size, buffer);
return boot_report_size;
}
}
@ -345,31 +373,14 @@ static int att_write_callback(hci_con_handle_t con_handle, uint16_t att_handle,
}
if (att_handle == instance->hid_boot_keyboard_output_value_handle){
// TODO
hids_device_emit_report(con_handle, 0, HID_REPORT_TYPE_OUTPUT, buffer, buffer_size);
return 0;
}
hids_device_report_t * report;
report = hids_device_get_report_for_value_handle(instance, att_handle);
if (report != NULL){
// assemble event in buffer
uint8_t event[257];
uint16_t pos = 0;
event[pos++] = HCI_EVENT_HIDS_META;
// skip length
pos++;
event[pos++] = HIDS_SUBEVENT_SET_REPORT;
little_endian_store_16(event, pos, con_handle);
pos += 2;
event[pos++] = report->id;
event[pos++] = (uint8_t) report->type;
uint8_t length_to_copy = btstack_min(buffer_size, 250);
event[pos++] = length_to_copy;
memcpy(&event[pos], buffer, length_to_copy);
pos += length_to_copy;
// set event length
event[1] = pos - 2;
(*packet_handler)(HCI_EVENT_PACKET, 0, event, pos);
hids_device_emit_report(con_handle, report->id, (uint8_t) report->type, buffer, buffer_size);
return 0;
}