1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
#include "serial_service.h"
#include "app_common.h"
#include "ble.h"
#include <furi.h>
#define TAG "BtSerialSvc"
typedef struct {
uint16_t svc_handle;
uint16_t rx_char_handle;
uint16_t tx_char_handle;
uint16_t flow_ctrl_char_handle;
osMutexId_t buff_size_mtx;
uint32_t buff_size;
uint16_t bytes_ready_to_receive;
SerialServiceEventCallback callback;
void* context;
} SerialSvc;
static SerialSvc* serial_svc = NULL;
static const uint8_t service_uuid[] =
{0x00, 0x00, 0xfe, 0x60, 0xcc, 0x7a, 0x48, 0x2a, 0x98, 0x4a, 0x7f, 0x2e, 0xd5, 0xb3, 0xe5, 0x8f};
static const uint8_t char_tx_uuid[] =
{0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
static const uint8_t char_rx_uuid[] =
{0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
static const uint8_t flow_ctrl_uuid[] =
{0x00, 0x00, 0xfe, 0x63, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void* event) {
SVCCTL_EvtAckStatus_t ret = SVCCTL_EvtNotAck;
hci_event_pckt* event_pckt = (hci_event_pckt*)(((hci_uart_pckt*)event)->data);
evt_blecore_aci* blecore_evt = (evt_blecore_aci*)event_pckt->data;
aci_gatt_attribute_modified_event_rp0* attribute_modified;
if(event_pckt->evt == HCI_VENDOR_SPECIFIC_DEBUG_EVT_CODE) {
if(blecore_evt->ecode == ACI_GATT_ATTRIBUTE_MODIFIED_VSEVT_CODE) {
attribute_modified = (aci_gatt_attribute_modified_event_rp0*)blecore_evt->data;
if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 2) {
// Descriptor handle
ret = SVCCTL_EvtAckFlowEnable;
FURI_LOG_D(TAG, "RX descriptor event");
} else if(attribute_modified->Attr_Handle == serial_svc->rx_char_handle + 1) {
FURI_LOG_D(TAG, "Received %d bytes", attribute_modified->Attr_Data_Length);
if(serial_svc->callback) {
furi_check(osMutexAcquire(serial_svc->buff_size_mtx, osWaitForever) == osOK);
if(attribute_modified->Attr_Data_Length > serial_svc->bytes_ready_to_receive) {
FURI_LOG_W(
TAG,
"Received %d, while was ready to receive %d bytes. Can lead to buffer overflow!",
attribute_modified->Attr_Data_Length,
serial_svc->bytes_ready_to_receive);
}
serial_svc->bytes_ready_to_receive -= MIN(
serial_svc->bytes_ready_to_receive, attribute_modified->Attr_Data_Length);
SerialServiceEvent event = {
.event = SerialServiceEventTypeDataReceived,
.data = {
.buffer = attribute_modified->Attr_Data,
.size = attribute_modified->Attr_Data_Length,
}};
uint32_t buff_free_size = serial_svc->callback(event, serial_svc->context);
FURI_LOG_D(TAG, "Available buff size: %d", buff_free_size);
furi_check(osMutexRelease(serial_svc->buff_size_mtx) == osOK);
}
ret = SVCCTL_EvtAckFlowEnable;
}
} else if(blecore_evt->ecode == ACI_GATT_SERVER_CONFIRMATION_VSEVT_CODE) {
FURI_LOG_T(TAG, "Ack received", blecore_evt->ecode);
if(serial_svc->callback) {
SerialServiceEvent event = {
.event = SerialServiceEventTypeDataSent,
};
serial_svc->callback(event, serial_svc->context);
}
ret = SVCCTL_EvtAckFlowEnable;
}
}
return ret;
}
void serial_svc_start() {
tBleStatus status;
serial_svc = malloc(sizeof(SerialSvc));
// Register event handler
SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
// Add service
status = aci_gatt_add_service(
UUID_TYPE_128, (Service_UUID_t*)service_uuid, PRIMARY_SERVICE, 10, &serial_svc->svc_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to add Serial service: %d", status);
}
// Add RX characteristics
status = aci_gatt_add_char(
serial_svc->svc_handle,
UUID_TYPE_128,
(const Char_UUID_t*)char_rx_uuid,
SERIAL_SVC_DATA_LEN_MAX,
CHAR_PROP_WRITE_WITHOUT_RESP | CHAR_PROP_WRITE | CHAR_PROP_READ,
ATTR_PERMISSION_AUTHEN_READ | ATTR_PERMISSION_AUTHEN_WRITE,
GATT_NOTIFY_ATTRIBUTE_WRITE,
10,
CHAR_VALUE_LEN_VARIABLE,
&serial_svc->rx_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to add RX characteristic: %d", status);
}
// Add TX characteristic
status = aci_gatt_add_char(
serial_svc->svc_handle,
UUID_TYPE_128,
(const Char_UUID_t*)char_tx_uuid,
SERIAL_SVC_DATA_LEN_MAX,
CHAR_PROP_READ | CHAR_PROP_INDICATE,
ATTR_PERMISSION_AUTHEN_READ,
GATT_DONT_NOTIFY_EVENTS,
10,
CHAR_VALUE_LEN_VARIABLE,
&serial_svc->tx_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to add TX characteristic: %d", status);
}
// Add Flow Control characteristic
status = aci_gatt_add_char(
serial_svc->svc_handle,
UUID_TYPE_128,
(const Char_UUID_t*)flow_ctrl_uuid,
sizeof(uint32_t),
CHAR_PROP_READ | CHAR_PROP_NOTIFY,
ATTR_PERMISSION_AUTHEN_READ,
GATT_DONT_NOTIFY_EVENTS,
10,
CHAR_VALUE_LEN_CONSTANT,
&serial_svc->flow_ctrl_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to add Flow Control characteristic: %d", status);
}
// Allocate buffer size mutex
serial_svc->buff_size_mtx = osMutexNew(NULL);
}
void serial_svc_set_callbacks(
uint16_t buff_size,
SerialServiceEventCallback callback,
void* context) {
furi_assert(serial_svc);
serial_svc->callback = callback;
serial_svc->context = context;
serial_svc->buff_size = buff_size;
serial_svc->bytes_ready_to_receive = buff_size;
uint32_t buff_size_reversed = REVERSE_BYTES_U32(serial_svc->buff_size);
aci_gatt_update_char_value(
serial_svc->svc_handle,
serial_svc->flow_ctrl_char_handle,
0,
sizeof(uint32_t),
(uint8_t*)&buff_size_reversed);
}
void serial_svc_notify_buffer_is_empty() {
furi_assert(serial_svc);
furi_assert(serial_svc->buff_size_mtx);
furi_check(osMutexAcquire(serial_svc->buff_size_mtx, osWaitForever) == osOK);
if(serial_svc->bytes_ready_to_receive == 0) {
FURI_LOG_D(TAG, "Buffer is empty. Notifying client");
serial_svc->bytes_ready_to_receive = serial_svc->buff_size;
uint32_t buff_size_reversed = REVERSE_BYTES_U32(serial_svc->buff_size);
aci_gatt_update_char_value(
serial_svc->svc_handle,
serial_svc->flow_ctrl_char_handle,
0,
sizeof(uint32_t),
(uint8_t*)&buff_size_reversed);
}
furi_check(osMutexRelease(serial_svc->buff_size_mtx) == osOK);
}
void serial_svc_stop() {
tBleStatus status;
if(serial_svc) {
// Delete characteristics
status = aci_gatt_del_char(serial_svc->svc_handle, serial_svc->tx_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to delete TX characteristic: %d", status);
}
status = aci_gatt_del_char(serial_svc->svc_handle, serial_svc->rx_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to delete RX characteristic: %d", status);
}
status = aci_gatt_del_char(serial_svc->svc_handle, serial_svc->flow_ctrl_char_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to delete Flow Control characteristic: %d", status);
}
// Delete service
status = aci_gatt_del_service(serial_svc->svc_handle);
if(status) {
FURI_LOG_E(TAG, "Failed to delete Serial service: %d", status);
}
// Delete buffer size mutex
osMutexDelete(serial_svc->buff_size_mtx);
free(serial_svc);
serial_svc = NULL;
}
}
bool serial_svc_is_started() {
return serial_svc != NULL;
}
bool serial_svc_update_tx(uint8_t* data, uint16_t data_len) {
if(data_len > SERIAL_SVC_DATA_LEN_MAX) {
return false;
}
for(uint16_t remained = data_len; remained > 0;) {
uint8_t value_len = MIN(SERIAL_SVC_CHAR_VALUE_LEN_MAX, remained);
uint16_t value_offset = data_len - remained;
remained -= value_len;
tBleStatus result = aci_gatt_update_char_value_ext(
0,
serial_svc->svc_handle,
serial_svc->tx_char_handle,
remained ? 0x00 : 0x02,
data_len,
value_offset,
value_len,
data + value_offset);
if(result) {
FURI_LOG_E(TAG, "Failed updating TX characteristic: %d", result);
return false;
}
}
return true;
}
|
