309 lines
9.2 KiB
C
309 lines
9.2 KiB
C
/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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#include "ble_nus.h"
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#include "nordic_common.h"
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#include "ble_srv_common.h"
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#include <string.h>
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/**@brief Function for handling the @ref BLE_GAP_EVT_CONNECTED event from the S110 SoftDevice.
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*
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* @param[in] p_nus Nordic UART Service structure.
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* @param[in] p_ble_evt Pointer to the event received from BLE stack.
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*/
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static void on_connect(ble_nus_t * p_nus, ble_evt_t * p_ble_evt)
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{
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p_nus->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
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}
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/**@brief Function for handling the @ref BLE_GAP_EVT_DISCONNECTED event from the S110
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* SoftDevice.
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*
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* @param[in] p_nus Nordic UART Service structure.
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* @param[in] p_ble_evt Pointer to the event received from BLE stack.
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*/
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static void on_disconnect(ble_nus_t * p_nus, ble_evt_t * p_ble_evt)
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{
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UNUSED_PARAMETER(p_ble_evt);
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p_nus->conn_handle = BLE_CONN_HANDLE_INVALID;
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}
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/**@brief Function for handling the @ref BLE_GATTS_EVT_WRITE event from the S110 SoftDevice.
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*
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* @param[in] p_dfu Nordic UART Service structure.
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* @param[in] p_ble_evt Pointer to the event received from BLE stack.
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*/
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static void on_write(ble_nus_t * p_nus, ble_evt_t * p_ble_evt)
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{
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ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
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if (
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(p_evt_write->handle == p_nus->rx_handles.cccd_handle)
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&&
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(p_evt_write->len == 2)
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)
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{
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if (ble_srv_is_notification_enabled(p_evt_write->data))
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{
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p_nus->is_notification_enabled = true;
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}
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else
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{
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p_nus->is_notification_enabled = false;
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}
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}
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else if (
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(p_evt_write->handle == p_nus->tx_handles.value_handle)
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&&
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(p_nus->data_handler != NULL)
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)
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{
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p_nus->data_handler(p_nus, p_evt_write->data, p_evt_write->len);
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}
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else
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{
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// Do Nothing. This event is not relevant to this service.
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}
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}
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/**@brief Function for adding RX characteristic.
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*
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* @param[in] p_nus Nordic UART Service structure.
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* @param[in] p_nus_init Information needed to initialize the service.
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*
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* @return NRF_SUCCESS on success, otherwise an error code.
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*/
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static uint32_t rx_char_add(ble_nus_t * p_nus, const ble_nus_init_t * p_nus_init)
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{
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/**@snippet [Adding proprietary characteristic to S110 SoftDevice] */
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ble_gatts_char_md_t char_md;
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ble_gatts_attr_md_t cccd_md;
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ble_gatts_attr_t attr_char_value;
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ble_uuid_t ble_uuid;
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ble_gatts_attr_md_t attr_md;
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memset(&cccd_md, 0, sizeof(cccd_md));
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
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cccd_md.vloc = BLE_GATTS_VLOC_STACK;
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memset(&char_md, 0, sizeof(char_md));
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char_md.char_props.notify = 1;
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char_md.p_char_user_desc = NULL;
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char_md.p_char_pf = NULL;
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char_md.p_user_desc_md = NULL;
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char_md.p_cccd_md = &cccd_md;
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char_md.p_sccd_md = NULL;
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ble_uuid.type = p_nus->uuid_type;
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ble_uuid.uuid = BLE_UUID_NUS_RX_CHARACTERISTIC;
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memset(&attr_md, 0, sizeof(attr_md));
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
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attr_md.vloc = BLE_GATTS_VLOC_STACK;
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attr_md.rd_auth = 0;
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attr_md.wr_auth = 0;
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attr_md.vlen = 1;
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memset(&attr_char_value, 0, sizeof(attr_char_value));
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attr_char_value.p_uuid = &ble_uuid;
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attr_char_value.p_attr_md = &attr_md;
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attr_char_value.init_len = sizeof(uint8_t);
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attr_char_value.init_offs = 0;
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attr_char_value.max_len = BLE_NUS_MAX_RX_CHAR_LEN;
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return sd_ble_gatts_characteristic_add(p_nus->service_handle,
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&char_md,
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&attr_char_value,
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&p_nus->rx_handles);
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/**@snippet [Adding proprietary characteristic to S110 SoftDevice] */
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}
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/**@brief Function for adding TX characteristic.
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*
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* @param[in] p_nus Nordic UART Service structure.
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* @param[in] p_nus_init Information needed to initialize the service.
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*
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* @return NRF_SUCCESS on success, otherwise an error code.
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*/
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static uint32_t tx_char_add(ble_nus_t * p_nus, const ble_nus_init_t * p_nus_init)
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{
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ble_gatts_char_md_t char_md;
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ble_gatts_attr_t attr_char_value;
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ble_uuid_t ble_uuid;
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ble_gatts_attr_md_t attr_md;
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memset(&char_md, 0, sizeof(char_md));
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char_md.char_props.write = 1;
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char_md.char_props.write_wo_resp = 1;
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char_md.p_char_user_desc = NULL;
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char_md.p_char_pf = NULL;
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char_md.p_user_desc_md = NULL;
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char_md.p_cccd_md = NULL;
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char_md.p_sccd_md = NULL;
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ble_uuid.type = p_nus->uuid_type;
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ble_uuid.uuid = BLE_UUID_NUS_TX_CHARACTERISTIC;
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memset(&attr_md, 0, sizeof(attr_md));
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
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attr_md.vloc = BLE_GATTS_VLOC_STACK;
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attr_md.rd_auth = 0;
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attr_md.wr_auth = 0;
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attr_md.vlen = 1;
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memset(&attr_char_value, 0, sizeof(attr_char_value));
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attr_char_value.p_uuid = &ble_uuid;
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attr_char_value.p_attr_md = &attr_md;
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attr_char_value.init_len = 1;
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attr_char_value.init_offs = 0;
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attr_char_value.max_len = BLE_NUS_MAX_TX_CHAR_LEN;
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return sd_ble_gatts_characteristic_add(p_nus->service_handle,
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&char_md,
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&attr_char_value,
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&p_nus->tx_handles);
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}
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void ble_nus_on_ble_evt(ble_nus_t * p_nus, ble_evt_t * p_ble_evt)
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{
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if ((p_nus == NULL) || (p_ble_evt == NULL))
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{
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return;
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}
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switch (p_ble_evt->header.evt_id)
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{
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case BLE_GAP_EVT_CONNECTED:
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on_connect(p_nus, p_ble_evt);
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break;
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case BLE_GAP_EVT_DISCONNECTED:
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on_disconnect(p_nus, p_ble_evt);
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break;
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case BLE_GATTS_EVT_WRITE:
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on_write(p_nus, p_ble_evt);
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break;
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default:
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// No implementation needed.
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break;
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}
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}
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uint32_t ble_nus_init(ble_nus_t * p_nus, const ble_nus_init_t * p_nus_init)
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{
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uint32_t err_code;
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ble_uuid_t ble_uuid;
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ble_uuid128_t nus_base_uuid = {{0x9E, 0xCA, 0xDC, 0x24, 0x0E, 0xE5, 0xA9, 0xE0,
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0x93, 0xF3, 0xA3, 0xB5, 0x00, 0x00, 0x40, 0x6E}};
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if ((p_nus == NULL) || (p_nus_init == NULL))
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{
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return NRF_ERROR_NULL;
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}
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// Initialize service structure.
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p_nus->conn_handle = BLE_CONN_HANDLE_INVALID;
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p_nus->data_handler = p_nus_init->data_handler;
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p_nus->is_notification_enabled = false;
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/**@snippet [Adding proprietary Service to S110 SoftDevice] */
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// Add custom base UUID.
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err_code = sd_ble_uuid_vs_add(&nus_base_uuid, &p_nus->uuid_type);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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ble_uuid.type = p_nus->uuid_type;
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ble_uuid.uuid = BLE_UUID_NUS_SERVICE;
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// Add service.
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err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
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&ble_uuid,
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&p_nus->service_handle);
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/**@snippet [Adding proprietary Service to S110 SoftDevice] */
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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// Add RX Characteristic.
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err_code = rx_char_add(p_nus, p_nus_init);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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// Add TX Characteristic.
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err_code = tx_char_add(p_nus, p_nus_init);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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return NRF_SUCCESS;
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}
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uint32_t ble_nus_send_string(ble_nus_t * p_nus, uint8_t * string, uint16_t length)
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{
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ble_gatts_hvx_params_t hvx_params;
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if (p_nus == NULL)
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{
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return NRF_ERROR_NULL;
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}
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if ((p_nus->conn_handle == BLE_CONN_HANDLE_INVALID) || (!p_nus->is_notification_enabled))
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{
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return NRF_ERROR_INVALID_STATE;
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}
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if (length > BLE_NUS_MAX_DATA_LEN)
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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memset(&hvx_params, 0, sizeof(hvx_params));
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hvx_params.handle = p_nus->rx_handles.value_handle;
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hvx_params.p_data = string;
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hvx_params.p_len = &length;
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hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
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return sd_ble_gatts_hvx(p_nus->conn_handle, &hvx_params);
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}
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