You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

633 lines
22 KiB

1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
1 year ago
  1. /**
  2. * Copyright (c) 2016 - 2021, Nordic Semiconductor ASA
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without modification,
  7. * are permitted provided that the following conditions are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright notice, this
  10. * list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form, except as embedded into a Nordic
  13. * Semiconductor ASA integrated circuit in a product or a software update for
  14. * such product, must reproduce the above copyright notice, this list of
  15. * conditions and the following disclaimer in the documentation and/or other
  16. * materials provided with the distribution.
  17. *
  18. * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
  19. * contributors may be used to endorse or promote products derived from this
  20. * software without specific prior written permission.
  21. *
  22. * 4. This software, with or without modification, must only be used with a
  23. * Nordic Semiconductor ASA integrated circuit.
  24. *
  25. * 5. Any software provided in binary form under this license must not be reverse
  26. * engineered, decompiled, modified and/or disassembled.
  27. *
  28. * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
  29. * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30. * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
  31. * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
  32. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34. * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. *
  39. */
  40. #include <stdbool.h>
  41. #include <stdint.h>
  42. #include <stdio.h>
  43. #include "app_error.h"
  44. #include "app_timer.h"
  45. #include "app_uart.h"
  46. #include "app_util.h"
  47. #include "ble.h"
  48. #include "ble_db_discovery.h"
  49. #include "ble_gap.h"
  50. #include "ble_hci.h"
  51. #include "bsp_btn_ble.h"
  52. #include "nordic_common.h"
  53. #include "nrf_ble_gatt.h"
  54. #include "nrf_ble_scan.h"
  55. #include "nrf_log.h"
  56. #include "nrf_log_ctrl.h"
  57. #include "nrf_log_default_backends.h"
  58. #include "nrf_pwr_mgmt.h"
  59. #include "nrf_sdh.h"
  60. #include "nrf_sdh_ble.h"
  61. #include "nrf_sdh_soc.h"
  62. #include "zble_nus_c.h"
  63. #define APP_BLE_CONN_CFG_TAG 1 /**< Tag that refers to the BLE stack configuration set with @ref sd_ble_cfg_set. The default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
  64. #define APP_BLE_OBSERVER_PRIO 3 /**< BLE observer priority of the application. There is no need to modify this value. */
  65. #define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
  66. #define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
  67. #define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
  68. #define ECHOBACK_BLE_UART_DATA 0 /**< Echo the UART data that is received over the Nordic UART Service (NUS) back to the sender. */
  69. BLE_NUS_C_DEF(m_ble_nus_c); /**< BLE Nordic UART Service (NUS) client instance. */
  70. NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
  71. BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instance. */
  72. NRF_BLE_SCAN_DEF(m_scan); /**< Scanning Module instance. */
  73. NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
  74. NRF_SDH_BLE_CENTRAL_LINK_COUNT, NRF_BLE_GQ_QUEUE_SIZE);
  75. static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
  76. /**@brief NUS UUID. */
  77. static ble_uuid_t const m_nus_uuid = {.uuid = BLE_UUID_NUS_SERVICE, .type = NUS_SERVICE_UUID_TYPE};
  78. /**@brief Function for handling asserts in the SoftDevice.
  79. *
  80. * @details This function is called in case of an assert in the SoftDevice.
  81. *
  82. * @warning This handler is only an example and is not meant for the final product. You need to analyze
  83. * how your product is supposed to react in case of assert.
  84. * @warning On assert from the SoftDevice, the system can only recover on reset.
  85. *
  86. * @param[in] line_num Line number of the failing assert call.
  87. * @param[in] p_file_name File name of the failing assert call.
  88. */
  89. void assert_nrf_callback(uint16_t line_num, const uint8_t* p_file_name) { app_error_handler(0xDEADBEEF, line_num, p_file_name); }
  90. /**@brief Function for handling the Nordic UART Service Client errors.
  91. *
  92. * @param[in] nrf_error Error code containing information about what went wrong.
  93. */
  94. static void nus_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); }
  95. /**@brief Function to start scanning. */
  96. static void scan_start(void) {
  97. ret_code_t ret;
  98. ret = nrf_ble_scan_start(&m_scan);
  99. APP_ERROR_CHECK(ret);
  100. ret = bsp_indication_set(BSP_INDICATE_SCANNING);
  101. APP_ERROR_CHECK(ret);
  102. }
  103. /**@brief Function for handling Scanning Module events.
  104. */
  105. static void scan_evt_handler(scan_evt_t const* p_scan_evt) {
  106. ret_code_t err_code;
  107. switch (p_scan_evt->scan_evt_id) {
  108. case NRF_BLE_SCAN_EVT_CONNECTING_ERROR: {
  109. err_code = p_scan_evt->params.connecting_err.err_code;
  110. APP_ERROR_CHECK(err_code);
  111. } break;
  112. case NRF_BLE_SCAN_EVT_CONNECTED: {
  113. ble_gap_evt_connected_t const* p_connected = p_scan_evt->params.connected.p_connected;
  114. // Scan is automatically stopped by the connection.
  115. NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x", p_connected->peer_addr.addr[0], p_connected->peer_addr.addr[1], p_connected->peer_addr.addr[2], p_connected->peer_addr.addr[3], p_connected->peer_addr.addr[4], p_connected->peer_addr.addr[5]);
  116. } break;
  117. case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT: {
  118. NRF_LOG_INFO("Scan timed out.");
  119. scan_start();
  120. } break;
  121. default:
  122. break;
  123. }
  124. }
  125. /**@brief Function for initializing the scanning and setting the filters.
  126. */
  127. static char m_target_periph_name0[20] = "M1002"; /**< Name of the device we try to connect to. This name is searched in the scan report data*/
  128. static char m_target_periph_name1[20] = "M1001"; /**< Name of the device we try to connect to. This name is searched in the scan report data*/
  129. static char m_target_periph_name2[20] = "iflytop"; /**< Name of the device we try to connect to. This name is searched in the scan report data*/
  130. static void scan_init(void) {
  131. ret_code_t err_code;
  132. nrf_ble_scan_init_t init_scan;
  133. memset(&init_scan, 0, sizeof(init_scan));
  134. init_scan.connect_if_match = true;
  135. init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
  136. err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  137. APP_ERROR_CHECK(err_code);
  138. // err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_nus_uuid);
  139. // APP_ERROR_CHECK(err_code);
  140. APP_ERROR_CHECK(nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name0));
  141. APP_ERROR_CHECK(nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name1));
  142. APP_ERROR_CHECK(nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name2));
  143. // err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_NAME_FILTER, false);
  144. // APP_ERROR_CHECK(err_code);
  145. err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_NAME_FILTER, false);
  146. APP_ERROR_CHECK(err_code);
  147. }
  148. /**@brief Function for handling database discovery events.
  149. *
  150. * @details This function is a callback function to handle events from the database discovery module.
  151. * Depending on the UUIDs that are discovered, this function forwards the events
  152. * to their respective services.
  153. *
  154. * @param[in] p_event Pointer to the database discovery event.
  155. */
  156. static void db_disc_handler(ble_db_discovery_evt_t* p_evt) { ble_nus_c_on_db_disc_evt(&m_ble_nus_c, p_evt); }
  157. /**@brief Function for handling characters received by the Nordic UART Service (NUS).
  158. *
  159. * @details This function takes a list of characters of length data_len and prints the characters out on UART.
  160. * If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
  161. */
  162. static void app_uart_force_put(uint8_t data){
  163. ret_code_t ret_val;
  164. do {
  165. ret_val = app_uart_put(data);
  166. if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY)) {
  167. NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", 0);
  168. APP_ERROR_CHECK(ret_val);
  169. }
  170. } while (ret_val == NRF_ERROR_BUSY);
  171. }
  172. static void ble_nus_chars_received_uart_print(uint8_t* p_data, uint16_t data_len) {
  173. ret_code_t ret_val;
  174. NRF_LOG_DEBUG("Receiving data.");
  175. NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
  176. app_uart_force_put(0x5A);
  177. app_uart_force_put(0xA5);
  178. for (uint32_t i = 0; i < data_len; i++) {
  179. do {
  180. ret_val = app_uart_put(p_data[i]);
  181. if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY)) {
  182. NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i);
  183. APP_ERROR_CHECK(ret_val);
  184. }
  185. } while (ret_val == NRF_ERROR_BUSY);
  186. }
  187. app_uart_force_put(0x5B);
  188. app_uart_force_put(0xB5);
  189. }
  190. static void ble_nus_chars_received_uart_print_ch4(uint8_t* p_data, uint16_t data_len) {
  191. ret_code_t ret_val;
  192. NRF_LOG_DEBUG("Receiving data.");
  193. NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
  194. app_uart_force_put(0x4A);
  195. app_uart_force_put(0xA4);
  196. for (uint32_t i = 0; i < data_len; i++) {
  197. do {
  198. ret_val = app_uart_put(p_data[i]);
  199. if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY)) {
  200. NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i);
  201. APP_ERROR_CHECK(ret_val);
  202. }
  203. } while (ret_val == NRF_ERROR_BUSY);
  204. }
  205. app_uart_force_put(0x4B);
  206. app_uart_force_put(0xB4);
  207. }
  208. /**@brief Function for handling app_uart events.
  209. *
  210. * @details This function receives a single character from the app_uart module and appends it to
  211. * a string. The string is sent over BLE when the last character received is a
  212. * 'new line' '\n' (hex 0x0A) or if the string reaches the maximum data length.
  213. */
  214. static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  215. static uint16_t data_array_index = 0;
  216. // static uint32_t
  217. void uart_event_handle(app_uart_evt_t* p_event) {
  218. uint32_t ret_val;
  219. switch (p_event->evt_type) {
  220. /**@snippet [Handling data from UART] */
  221. case APP_UART_DATA_READY:
  222. UNUSED_VARIABLE(app_uart_get(&data_array[data_array_index]));
  223. data_array_index++;
  224. if (data_array_index >= (m_ble_nus_max_data_len)) {
  225. NRF_LOG_DEBUG("Ready to send data over BLE NUS");
  226. NRF_LOG_HEXDUMP_DEBUG(data_array, data_array_index);
  227. do {
  228. ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, data_array_index);
  229. if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES)) {
  230. APP_ERROR_CHECK(ret_val);
  231. }
  232. } while (ret_val == NRF_ERROR_RESOURCES);
  233. data_array_index = 0;
  234. }
  235. break;
  236. /**@snippet [Handling data from UART] */
  237. case APP_UART_COMMUNICATION_ERROR:
  238. NRF_LOG_ERROR("Communication error occurred while handling UART.");
  239. APP_ERROR_HANDLER(p_event->data.error_communication);
  240. break;
  241. case APP_UART_FIFO_ERROR:
  242. NRF_LOG_ERROR("Error occurred in FIFO module used by UART.");
  243. APP_ERROR_HANDLER(p_event->data.error_code);
  244. break;
  245. default:
  246. break;
  247. }
  248. }
  249. /**@brief Callback handling Nordic UART Service (NUS) client events.
  250. *
  251. * @details This function is called to notify the application of NUS client events.
  252. *
  253. * @param[in] p_ble_nus_c NUS client handle. This identifies the NUS client.
  254. * @param[in] p_ble_nus_evt Pointer to the NUS client event.
  255. */
  256. /**@snippet [Handling events from the ble_nus_c module] */
  257. typedef struct {
  258. uint32_t rxcnt;
  259. uint32_t m_rx_sum_cnt;
  260. } block_data_rx_state_t;
  261. block_data_rx_state_t block_data_rx_state;
  262. static void ble_nus_c_evt_handler(ble_nus_c_t* p_ble_nus_c, ble_nus_c_evt_t const* p_ble_nus_evt) {
  263. ret_code_t err_code;
  264. switch (p_ble_nus_evt->evt_type) {
  265. case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
  266. NRF_LOG_INFO("Discovery complete.");
  267. err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
  268. APP_ERROR_CHECK(err_code);
  269. err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
  270. APP_ERROR_CHECK(err_code);
  271. NRF_LOG_INFO("Connected to device with Nordic UART Service.");
  272. break;
  273. case BLE_NUS_C_EVT_NUS_TX_EVT:
  274. ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
  275. break;
  276. case BLE_NUS_C_EVT_NUS_TX_EVT_2:
  277. block_data_rx_state.rxcnt += p_ble_nus_evt->data_len;
  278. for (size_t i = 0; i < p_ble_nus_evt->data_len; i++) {
  279. block_data_rx_state.m_rx_sum_cnt += p_ble_nus_evt->p_data[i];
  280. }
  281. ble_nus_chars_received_uart_print_ch4((uint8_t*)&block_data_rx_state, sizeof(block_data_rx_state));
  282. break;
  283. case BLE_NUS_C_EVT_DISCONNECTED:
  284. NRF_LOG_INFO("Disconnected.");
  285. scan_start();
  286. break;
  287. }
  288. }
  289. /**@snippet [Handling events from the ble_nus_c module] */
  290. /**
  291. * @brief Function for handling shutdown events.
  292. *
  293. * @param[in] event Shutdown type.
  294. */
  295. static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) {
  296. ret_code_t err_code;
  297. err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  298. APP_ERROR_CHECK(err_code);
  299. switch (event) {
  300. case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
  301. // Prepare wakeup buttons.
  302. err_code = bsp_btn_ble_sleep_mode_prepare();
  303. APP_ERROR_CHECK(err_code);
  304. break;
  305. default:
  306. break;
  307. }
  308. return true;
  309. }
  310. NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);
  311. /**@brief Function for handling BLE events.
  312. *
  313. * @param[in] p_ble_evt Bluetooth stack event.
  314. * @param[in] p_context Unused.
  315. */
  316. static void ble_evt_handler(ble_evt_t const* p_ble_evt, void* p_context) {
  317. ret_code_t err_code;
  318. ble_gap_evt_t const* p_gap_evt = &p_ble_evt->evt.gap_evt;
  319. switch (p_ble_evt->header.evt_id) {
  320. case BLE_GAP_EVT_CONNECTED:
  321. err_code = ble_nus_c_handles_assign(&m_ble_nus_c, p_ble_evt->evt.gap_evt.conn_handle, NULL);
  322. APP_ERROR_CHECK(err_code);
  323. err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
  324. APP_ERROR_CHECK(err_code);
  325. // start discovery of services. The NUS Client waits for a discovery result
  326. err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle);
  327. APP_ERROR_CHECK(err_code);
  328. break;
  329. case BLE_GAP_EVT_DISCONNECTED:
  330. NRF_LOG_INFO("Disconnected. conn_handle: 0x%x, reason: 0x%x", p_gap_evt->conn_handle, p_gap_evt->params.disconnected.reason);
  331. break;
  332. case BLE_GAP_EVT_TIMEOUT:
  333. if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) {
  334. NRF_LOG_INFO("Connection Request timed out.");
  335. }
  336. break;
  337. case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
  338. // Pairing not supported.
  339. err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
  340. APP_ERROR_CHECK(err_code);
  341. break;
  342. case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
  343. // Accepting parameters requested by peer.
  344. err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle, &p_gap_evt->params.conn_param_update_request.conn_params);
  345. APP_ERROR_CHECK(err_code);
  346. break;
  347. case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
  348. NRF_LOG_DEBUG("PHY update request.");
  349. ble_gap_phys_t const phys = {
  350. .rx_phys = BLE_GAP_PHY_AUTO,
  351. .tx_phys = BLE_GAP_PHY_AUTO,
  352. };
  353. err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
  354. APP_ERROR_CHECK(err_code);
  355. } break;
  356. case BLE_GATTC_EVT_TIMEOUT:
  357. // Disconnect on GATT Client timeout event.
  358. NRF_LOG_DEBUG("GATT Client Timeout.");
  359. err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
  360. APP_ERROR_CHECK(err_code);
  361. break;
  362. case BLE_GATTS_EVT_TIMEOUT:
  363. // Disconnect on GATT Server timeout event.
  364. NRF_LOG_DEBUG("GATT Server Timeout.");
  365. err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
  366. APP_ERROR_CHECK(err_code);
  367. break;
  368. default:
  369. break;
  370. }
  371. }
  372. /**@brief Function for initializing the BLE stack.
  373. *
  374. * @details Initializes the SoftDevice and the BLE event interrupt.
  375. */
  376. static void ble_stack_init(void) {
  377. ret_code_t err_code;
  378. err_code = nrf_sdh_enable_request();
  379. APP_ERROR_CHECK(err_code);
  380. // Configure the BLE stack using the default settings.
  381. // Fetch the start address of the application RAM.
  382. uint32_t ram_start = 0;
  383. err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  384. APP_ERROR_CHECK(err_code);
  385. // Enable BLE stack.
  386. err_code = nrf_sdh_ble_enable(&ram_start);
  387. APP_ERROR_CHECK(err_code);
  388. // Register a handler for BLE events.
  389. NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
  390. }
  391. /**@brief Function for handling events from the GATT library. */
  392. void gatt_evt_handler(nrf_ble_gatt_t* p_gatt, nrf_ble_gatt_evt_t const* p_evt) {
  393. if (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED) {
  394. NRF_LOG_INFO("ATT MTU exchange completed.");
  395. m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
  396. NRF_LOG_INFO("Ble NUS max data length set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  397. }
  398. }
  399. /**@brief Function for initializing the GATT library. */
  400. void gatt_init(void) {
  401. ret_code_t err_code;
  402. err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  403. APP_ERROR_CHECK(err_code);
  404. err_code = nrf_ble_gatt_att_mtu_central_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  405. APP_ERROR_CHECK(err_code);
  406. }
  407. /**@brief Function for handling events from the BSP module.
  408. *
  409. * @param[in] event Event generated by button press.
  410. */
  411. void bsp_event_handler(bsp_event_t event) {
  412. ret_code_t err_code;
  413. switch (event) {
  414. case BSP_EVENT_SLEEP:
  415. nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
  416. break;
  417. case BSP_EVENT_DISCONNECT:
  418. err_code = sd_ble_gap_disconnect(m_ble_nus_c.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
  419. if (err_code != NRF_ERROR_INVALID_STATE) {
  420. APP_ERROR_CHECK(err_code);
  421. }
  422. break;
  423. default:
  424. break;
  425. }
  426. }
  427. /**@brief Function for initializing the UART. */
  428. static void uart_init(void) {
  429. ret_code_t err_code;
  430. app_uart_comm_params_t const comm_params = {.rx_pin_no = RX_PIN_NUMBER, .tx_pin_no = TX_PIN_NUMBER, .rts_pin_no = RTS_PIN_NUMBER, .cts_pin_no = CTS_PIN_NUMBER, .flow_control = APP_UART_FLOW_CONTROL_DISABLED, .use_parity = false, .baud_rate = UART_BAUDRATE_BAUDRATE_Baud921600};
  431. APP_UART_FIFO_INIT(&comm_params, UART_RX_BUF_SIZE, UART_TX_BUF_SIZE, uart_event_handle, APP_IRQ_PRIORITY_LOWEST, err_code);
  432. APP_ERROR_CHECK(err_code);
  433. }
  434. /**@brief Function for initializing the Nordic UART Service (NUS) client. */
  435. static void nus_c_init(void) {
  436. ret_code_t err_code;
  437. ble_nus_c_init_t init;
  438. init.evt_handler = ble_nus_c_evt_handler;
  439. init.error_handler = nus_error_handler;
  440. init.p_gatt_queue = &m_ble_gatt_queue;
  441. err_code = ble_nus_c_init(&m_ble_nus_c, &init);
  442. APP_ERROR_CHECK(err_code);
  443. }
  444. /**@brief Function for initializing buttons and leds. */
  445. static void buttons_leds_init(void) {
  446. ret_code_t err_code;
  447. bsp_event_t startup_event;
  448. err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
  449. APP_ERROR_CHECK(err_code);
  450. err_code = bsp_btn_ble_init(NULL, &startup_event);
  451. APP_ERROR_CHECK(err_code);
  452. }
  453. /**@brief Function for initializing the timer. */
  454. static void timer_init(void) {
  455. ret_code_t err_code = app_timer_init();
  456. APP_ERROR_CHECK(err_code);
  457. }
  458. /**@brief Function for initializing the nrf log module. */
  459. static void log_init(void) {
  460. ret_code_t err_code = NRF_LOG_INIT(NULL);
  461. APP_ERROR_CHECK(err_code);
  462. NRF_LOG_DEFAULT_BACKENDS_INIT();
  463. }
  464. /**@brief Function for initializing power management.
  465. */
  466. static void power_management_init(void) {
  467. ret_code_t err_code;
  468. err_code = nrf_pwr_mgmt_init();
  469. APP_ERROR_CHECK(err_code);
  470. }
  471. /** @brief Function for initializing the database discovery module. */
  472. static void db_discovery_init(void) {
  473. ble_db_discovery_init_t db_init;
  474. memset(&db_init, 0, sizeof(ble_db_discovery_init_t));
  475. db_init.evt_handler = db_disc_handler;
  476. db_init.p_gatt_queue = &m_ble_gatt_queue;
  477. ret_code_t err_code = ble_db_discovery_init(&db_init);
  478. APP_ERROR_CHECK(err_code);
  479. }
  480. /**@brief Function for handling the idle state (main loop).
  481. *
  482. * @details Handles any pending log operations, then sleeps until the next event occurs.
  483. */
  484. static void idle_state_handle(void) {
  485. if (NRF_LOG_PROCESS() == false) {
  486. nrf_pwr_mgmt_run();
  487. }
  488. }
  489. APP_TIMER_DEF(m_uart_send_tmr); // ״̬��������ʱ��
  490. static void uart_send_tmr_cb(void* p_context) { //
  491. static uint32_t last_data_array_index;
  492. ret_code_t ret_val;
  493. if (data_array_index != 0 && data_array_index == last_data_array_index) {
  494. do {
  495. ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, data_array_index);
  496. if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_RESOURCES)) {
  497. APP_ERROR_CHECK(ret_val);
  498. }
  499. } while (ret_val == NRF_ERROR_RESOURCES);
  500. data_array_index = 0;
  501. last_data_array_index = 0;
  502. }
  503. last_data_array_index = data_array_index;
  504. }
  505. int main(void) {
  506. // Initialize.
  507. log_init();
  508. timer_init();
  509. uart_init();
  510. buttons_leds_init();
  511. db_discovery_init();
  512. power_management_init();
  513. ble_stack_init();
  514. gatt_init();
  515. nus_c_init();
  516. scan_init();
  517. app_timer_create(&m_uart_send_tmr, APP_TIMER_MODE_REPEATED, uart_send_tmr_cb);
  518. app_timer_start(m_uart_send_tmr, APP_TIMER_TICKS(2), NULL);
  519. // Start execution.
  520. // printf("BLE UART central example started.\r\n");
  521. NRF_LOG_INFO("BLE UART central example started.");
  522. scan_start();
  523. // Enter main loop.
  524. for (;;) {
  525. idle_state_handle();
  526. }
  527. }