Wallbot_CaaS
Dependencies: MPU6050 mbed PID
Fork of BLE_MPU6050_test6_challenge_sb by
custom_helper.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #include "custom_helper.h" 00018 00019 /* 00020 * The current version of the soft-device doesn't handle duplicate 128-bit UUIDs 00021 * very well. It is therefore necessary to filter away duplicates before 00022 * passing long UUIDs to sd_ble_uuid_vs_add(). The following types and data 00023 * structures involved in maintaining a local cache of 128-bit UUIDs. 00024 */ 00025 typedef struct { 00026 LongUUIDBytes_t uuid; 00027 uint8_t type; 00028 } converted_uuid_table_entry_t; 00029 static const unsigned UUID_TABLE_MAX_ENTRIES = 8; /* This is the maximum number of 128-bit UUIDs with distinct bases that 00030 * we expect to be in use; increase this limit if needed. */ 00031 static unsigned uuidTableEntries = 0; /* current usage of the table */ 00032 converted_uuid_table_entry_t convertedUUIDTable[UUID_TABLE_MAX_ENTRIES]; 00033 00034 /** 00035 * lookup the cache of previously converted 128-bit UUIDs to find a type value. 00036 * @param uuid base 128-bit UUID 00037 * @param recoveredType the type field of the 3-byte nRF's uuid. 00038 * @return true if a match is found. 00039 */ 00040 static bool 00041 lookupConvertedUUIDTable(const LongUUIDBytes_t uuid, uint8_t *recoveredType) 00042 { 00043 unsigned i; 00044 for (i = 0; i < uuidTableEntries; i++) { 00045 if (memcmp(convertedUUIDTable[i].uuid, uuid, LENGTH_OF_LONG_UUID) == 0) { 00046 *recoveredType = convertedUUIDTable[i].type; 00047 return true; 00048 } 00049 } 00050 00051 return false; 00052 } 00053 00054 static void 00055 addToConvertedUUIDTable(const LongUUIDBytes_t uuid, uint8_t type) 00056 { 00057 if (uuidTableEntries == UUID_TABLE_MAX_ENTRIES) { 00058 return; /* recovery needed; or at least the user should be warned about this fact.*/ 00059 } 00060 00061 memcpy(convertedUUIDTable[uuidTableEntries].uuid, uuid,LENGTH_OF_LONG_UUID); 00062 convertedUUIDTable[uuidTableEntries].type = type; 00063 uuidTableEntries++; 00064 } 00065 00066 /** 00067 * The nRF transport has its own 3-byte representation of a UUID. If the user- 00068 * specified UUID is 128-bits wide, then the UUID base needs to be added to the 00069 * soft-device and converted to a 3-byte handle before being used further. This 00070 * function is responsible for this translation of user-specified UUIDs into 00071 * nRF's representation. 00072 * 00073 * @param[in] uuid 00074 * user-specified UUID 00075 * @return nRF 00076 * 3-byte UUID (containing a type and 16-bit UUID) representation 00077 * to be used with SVC calls. 00078 */ 00079 ble_uuid_t custom_convert_to_nordic_uuid(const UUID &uuid) 00080 { 00081 ble_uuid_t nordicUUID = { 00082 .uuid = uuid.getShortUUID(), 00083 .type = BLE_UUID_TYPE_UNKNOWN /* to be set below */ 00084 }; 00085 00086 if (uuid.shortOrLong() == UUID::UUID_TYPE_SHORT) { 00087 nordicUUID.type = BLE_UUID_TYPE_BLE; 00088 } else { 00089 if (!lookupConvertedUUIDTable(uuid.getBaseUUID(), &nordicUUID.type)) { 00090 nordicUUID.type = custom_add_uuid_base(uuid.getBaseUUID()); 00091 addToConvertedUUIDTable(uuid.getBaseUUID(), nordicUUID.type); 00092 } 00093 } 00094 00095 return nordicUUID; 00096 } 00097 00098 /**************************************************************************/ 00099 /*! 00100 @brief Adds the base UUID to the custom service. All UUIDs used 00101 by this service are based on this 128-bit UUID. 00102 00103 @note This UUID needs to be added to the SoftDevice stack before 00104 adding the service's primary service via 00105 'sd_ble_gatts_service_add' 00106 00107 @param[in] p_uuid_base A pointer to the 128-bit UUID array (8*16) 00108 00109 @returns The UUID type. 00110 A return value of 0 should be considered an error. 00111 00112 @retval 0x00 BLE_UUID_TYPE_UNKNOWN 00113 @retval 0x01 BLE_UUID_TYPE_BLE 00114 @retval 0x02 BLE_UUID_TYPE_VENDOR_BEGIN 00115 00116 @section EXAMPLE 00117 @code 00118 00119 // Take note that bytes 2/3 are blank since these are used to identify 00120 // the primary service and individual characteristics 00121 #define CFG_CUSTOM_UUID_BASE "\x6E\x40\x00\x00\xB5\xA3\xF3\x93\xE0\xA9\xE5\x0E\x24\xDC\xCA\x9E" 00122 00123 uint8_t uuid_type = custom_add_uuid_base(CFG_CUSTOM_UUID_BASE); 00124 ASSERT(uuid_type > 0, ERROR_NOT_FOUND); 00125 00126 // We can now safely add the primary service and any characteristics 00127 // for our custom service ... 00128 00129 @endcode 00130 */ 00131 /**************************************************************************/ 00132 uint8_t custom_add_uuid_base(uint8_t const *const p_uuid_base) 00133 { 00134 ble_uuid128_t base_uuid; 00135 uint8_t uuid_type = 0; 00136 00137 /* Reverse the bytes since ble_uuid128_t is LSB */ 00138 for (uint8_t i = 0; i<16; i++) { 00139 base_uuid.uuid128[i] = p_uuid_base[15 - i]; 00140 } 00141 00142 ASSERT_INT( ERROR_NONE, sd_ble_uuid_vs_add( &base_uuid, &uuid_type ), 0); 00143 00144 return uuid_type; 00145 } 00146 00147 /**************************************************************************/ 00148 /*! 00149 00150 */ 00151 /**************************************************************************/ 00152 error_t custom_decode_uuid_base(uint8_t const *const p_uuid_base, 00153 ble_uuid_t *p_uuid) 00154 { 00155 LongUUIDBytes_t uuid_base_le; 00156 00157 /* Reverse the bytes since ble_uuid128_t is LSB */ 00158 for (uint8_t i = 0; i<16; i++) { 00159 uuid_base_le[i] = p_uuid_base[15 - i]; 00160 } 00161 00162 ASSERT_STATUS( sd_ble_uuid_decode(16, uuid_base_le, p_uuid)); 00163 00164 return ERROR_NONE; 00165 } 00166 00167 /**************************************************************************/ 00168 /*! 00169 @brief Adds a new characteristic to the custom service, assigning 00170 properties, a UUID add-on value, etc. 00171 00172 @param[in] service_handle 00173 @param[in] p_uuid The 16-bit value to add to the base UUID 00174 for this characteristic (normally >1 00175 since 1 is typically used by the primary 00176 service). 00177 @param[in] char_props The characteristic properties, as 00178 defined by ble_gatt_char_props_t 00179 @param[in] max_length The maximum length of this characeristic 00180 @param[in] p_char_handle 00181 00182 @returns 00183 @retval ERROR_NONE Everything executed normally 00184 */ 00185 /**************************************************************************/ 00186 error_t custom_add_in_characteristic(uint16_t service_handle, 00187 ble_uuid_t *p_uuid, 00188 uint8_t properties, 00189 uint8_t *p_data, 00190 uint16_t min_length, 00191 uint16_t max_length, 00192 ble_gatts_char_handles_t *p_char_handle) 00193 { 00194 /* Characteristic metadata */ 00195 ble_gatts_attr_md_t cccd_md; 00196 ble_gatt_char_props_t char_props; 00197 00198 memcpy(&char_props, &properties, 1); 00199 00200 if (char_props.notify || char_props.indicate) { 00201 /* Notification requires cccd */ 00202 memclr_( &cccd_md, sizeof(ble_gatts_attr_md_t)); 00203 cccd_md.vloc = BLE_GATTS_VLOC_STACK; 00204 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm); 00205 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm); 00206 } 00207 00208 ble_gatts_char_md_t char_md = {0}; 00209 00210 char_md.char_props = char_props; 00211 char_md.p_cccd_md = 00212 (char_props.notify || char_props.indicate) ? &cccd_md : NULL; 00213 00214 /* Attribute declaration */ 00215 ble_gatts_attr_md_t attr_md = {0}; 00216 00217 attr_md.vloc = BLE_GATTS_VLOC_STACK; 00218 attr_md.vlen = (min_length == max_length) ? 0 : 1; 00219 00220 if (char_props.read || char_props.notify || char_props.indicate) { 00221 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm); 00222 } 00223 00224 if (char_props.write) { 00225 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm); 00226 } 00227 00228 ble_gatts_attr_t attr_char_value = {0}; 00229 00230 attr_char_value.p_uuid = p_uuid; 00231 attr_char_value.p_attr_md = &attr_md; 00232 attr_char_value.init_len = min_length; 00233 attr_char_value.max_len = max_length; 00234 attr_char_value.p_value = p_data; 00235 00236 ASSERT_STATUS ( sd_ble_gatts_characteristic_add(service_handle, 00237 &char_md, 00238 &attr_char_value, 00239 p_char_handle)); 00240 00241 return ERROR_NONE; 00242 } 00243 00244 00245 00246 /**************************************************************************/ 00247 /*! 00248 @brief Adds a new descriptor to the custom service, assigning 00249 value, a UUID add-on value, etc. 00250 00251 @param[in] char_handle 00252 @param[in] p_uuid The 16-bit value to add to the base UUID 00253 for this descriptor (normally >1 00254 since 1 is typically used by the primary 00255 service). 00256 @param[in] max_length The maximum length of this descriptor 00257 00258 @returns 00259 @retval ERROR_NONE Everything executed normally 00260 */ 00261 /**************************************************************************/ 00262 error_t custom_add_in_descriptor(uint16_t char_handle, 00263 ble_uuid_t *p_uuid, 00264 uint8_t *p_data, 00265 uint16_t min_length, 00266 uint16_t max_length, 00267 uint16_t *p_desc_handle) 00268 { 00269 /* Descriptor metadata */ 00270 ble_gatts_attr_md_t desc_md = {0}; 00271 00272 desc_md.vloc = BLE_GATTS_VLOC_STACK; 00273 desc_md.vlen = (min_length == max_length) ? 0 : 1; 00274 00275 /* Make it readable and writable */ 00276 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&desc_md.read_perm); 00277 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&desc_md.write_perm); 00278 00279 ble_gatts_attr_t attr_desc = {0}; 00280 00281 attr_desc.p_uuid = p_uuid; 00282 attr_desc.p_attr_md = &desc_md; 00283 attr_desc.init_len = min_length; 00284 attr_desc.max_len = max_length; 00285 attr_desc.p_value = p_data; 00286 00287 ASSERT_STATUS ( sd_ble_gatts_descriptor_add(char_handle, 00288 &attr_desc, 00289 p_desc_handle)); 00290 00291 return ERROR_NONE; 00292 }
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