ble_hds.c
5.63 KB
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
#include "sdk_common.h"
#include "ble_hds.h"
#include <string.h>
#include "ble_srv_common.h"
#include "boards.h"
#include "nrf_log.h"
static void on_connect(ble_hds_t * p_hds, ble_evt_t const * p_ble_evt)
{
p_hds->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
}
static void on_disconnect(ble_hds_t * p_hds, ble_evt_t const * p_ble_evt)
{
UNUSED_PARAMETER(p_ble_evt);
p_hds->conn_handle = BLE_CONN_HANDLE_INVALID;
}
void ble_hds_on_ble_evt( ble_evt_t const * p_ble_evt, void * p_context)
{
ble_hds_t * p_hds = (ble_hds_t *) p_context;
NRF_LOG_INFO("BLE event received. Event type = %d\r\n", p_ble_evt->header.evt_id);
if (p_hds == NULL || p_ble_evt == NULL)
{
return;
}
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_hds, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnect(p_hds, p_ble_evt);
break;
default:
// No implementation needed.
break;
}
}
static uint32_t custom_value_char_add(ble_hds_t * p_hds, const ble_hds_init_t * p_hds_init)
{
uint32_t err_code;
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t attr_md;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.char_props.write = 0;
char_md.char_props.notify = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = &cccd_md;
char_md.p_sccd_md = NULL;
memset(&cccd_md, 0, sizeof(cccd_md));
// Read operation on Cccd should be possible without authentication.
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_hds_init->custom_value_char_attr_md.read_perm;
attr_md.write_perm = p_hds_init->custom_value_char_attr_md.write_perm;
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
ble_uuid.type = p_hds->uuid_type;
ble_uuid.uuid = HD_CUSTOM_VALUE_CHAR_UUID;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = sizeof(uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len = sizeof(uint8_t);
//attr_char_value.p_value
err_code = sd_ble_gatts_characteristic_add(p_hds->service_handle, &char_md,
&attr_char_value,
&p_hds->custom_value_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
return NRF_SUCCESS;
}
uint32_t ble_hds_init(ble_hds_t * p_hds, const ble_hds_init_t * p_hds_init)
{
if (p_hds == NULL || p_hds_init == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code;
ble_uuid_t ble_uuid;
// Initialize service structure
p_hds->evt_handler = p_hds_init->evt_handler;
p_hds->conn_handle = BLE_CONN_HANDLE_INVALID;
// Add Custom Service UUID
ble_uuid128_t base_uuid = {HD_CUSTOM_SERVICE_UUID_BASE};
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_hds->uuid_type);
VERIFY_SUCCESS(err_code);
ble_uuid.type = p_hds->uuid_type;
ble_uuid.uuid = HD_CUSTOM_SERVICE_UUID;
// Add the Custom Service
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_hds->service_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Add Custom Value characteristic
return custom_value_char_add(p_hds, p_hds_init);
}
uint32_t ble_hds_custom_value_update(ble_hds_t * p_hds, uint8_t custom_value)
{
NRF_LOG_INFO("In ble_hds_custom_value_update. \r\n");
if (p_hds == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code = NRF_SUCCESS;
ble_gatts_value_t gatts_value;
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = sizeof(uint8_t);
gatts_value.offset = 0;
gatts_value.p_value = &custom_value;
// Update database.
err_code = sd_ble_gatts_value_set(p_hds->conn_handle,
p_hds->custom_value_handles.value_handle,
&gatts_value);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Send value if connected and notifying.
if ((p_hds->conn_handle != BLE_CONN_HANDLE_INVALID))
{
ble_gatts_hvx_params_t hvx_params;
memset(&hvx_params, 0, sizeof(hvx_params));
hvx_params.handle = p_hds->custom_value_handles.value_handle;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.offset = gatts_value.offset;
hvx_params.p_len = &gatts_value.len;
hvx_params.p_data = gatts_value.p_value;
err_code = sd_ble_gatts_hvx(p_hds->conn_handle, &hvx_params);
NRF_LOG_INFO("sd_ble_gatts_hvx result: %x. \r\n", err_code);
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
NRF_LOG_INFO("sd_ble_gatts_hvx result: NRF_ERROR_INVALID_STATE. \r\n");
}
return err_code;
}