[GitHub] mjurczak commented on a change in pull request #819: Feature/blecsc app: Cycling Speed and Cadence app
mjurczak commented on a change in pull request #819: Feature/blecsc app:
Cycling Speed and Cadence app
URL: https://github.com/apache/mynewt-core/pull/819#discussion_r169182831
##
File path: apps/blecsc/src/main.c
##
@@ -0,0 +1,323 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include
+#include
+#include
+#include
+
+#include "sysinit/sysinit.h"
+#include "os/os.h"
+#include "console/console.h"
+#include "config/config.h"
+#include "nimble/ble.h"
+#include "host/ble_hs.h"
+#include "services/gap/ble_svc_gap.h"
+#include "blecsc_sens.h"
+
+/* Wheel size for simulation calculations */
+#define CSC_SIM_WHEEL_CIRCUMFERENCE_MM2000
+/* Simulated cadence lower limit */
+#define CSC_SIM_CRANK_RPM_MIN 20
+/* Simulated cadence upper limit */
+#define CSC_SIM_CRANK_RPM_MAX 100
+/* Simulated speed lower limit */
+#define CSC_SIM_SPEED_KPH_MIN 0
+/* Simulated speed upper limit */
+#define CSC_SIM_SPEED_KPH_MAX 35
+
+/* Log data */
+struct log blecsc_log;
+
+/* Noticication status */
+static bool notify_state = false;
+
+/* Connection handle */
+static uint16_t conn_handle;
+
+static uint8_t blecsc_addr_type;
+
+/* Advertised device name */
+static const char *device_name = "blecsc_sensor";
+
+/* Advertised device appearance */
+static const uint16_t device_appearance = 1157;
+
+/* Measurement and notification timer */
+static struct os_callout blecsc_measure_timer;
+
+/* Variable holds current CSC measurement state */
+static struct ble_csc_measurement_state csc_measurement_state;
+
+/* Variable holds simulted speed (kilometers per hour) */
+static uint16_t csc_sim_speed_kph = CSC_SIM_SPEED_KPH_MIN;
+
+/* Variable holds simulated cadence (RPM) */
+static uint8_t csc_sim_crank_rpm = CSC_SIM_CRANK_RPM_MIN;
+
+
+static int blecsc_gap_event(struct ble_gap_event *event, void *arg);
+
+
+/*
+ * Enables advertising with parameters:
+ * o General discoverable mode
+ * o Undirected connectable mode
+ */
+static void
+blecsc_advertise(void)
+{
+struct ble_gap_adv_params adv_params;
+struct ble_hs_adv_fields fields;
+int rc;
+
+/*
+ * Set the advertisement data included in our advertisements:
+ * o Flags (indicates advertisement type and other general info)
+ * o Advertising tx power
+ * o Device name
+ */
+memset(&fields, 0, sizeof(fields));
+
+/*
+ * Advertise two flags:
+ * o Discoverability in forthcoming advertisement (general)
+ * o BLE-only (BR/EDR unsupported)
+ */
+fields.flags = BLE_HS_ADV_F_DISC_GEN |
+ BLE_HS_ADV_F_BREDR_UNSUP;
+
+/*
+ * Indicate that the TX power level field should be included; have the
+ * stack fill this value automatically. This is done by assigning the
+ * special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
+ */
+fields.tx_pwr_lvl_is_present = 1;
+fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
+
+fields.name = (uint8_t *)device_name;
+fields.name_len = strlen(device_name);
+fields.name_is_complete = 1;
+
+/*
+ * Set appearance to: Cycling Speed and Cadence Sensor.
+ */
+fields.appearance = device_appearance;
+fields.appearance_is_present = 1;
+
+rc = ble_gap_adv_set_fields(&fields);
+if (rc != 0) {
+BLECSC_LOG(ERROR, "error setting advertisement data; rc=%d\n", rc);
+return;
+}
+
+/* Begin advertising */
+memset(&adv_params, 0, sizeof(adv_params));
+adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
+adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
+rc = ble_gap_adv_start(blecsc_addr_type, NULL, BLE_HS_FOREVER,
+ &adv_params, blecsc_gap_event, NULL);
+if (rc != 0) {
+BLECSC_LOG(ERROR, "error enabling advertisement; rc=%d\n", rc);
+return;
+}
+}
+
+
+/* Update simulated CSC measurements.
+ * Each call increments wheel and crank revolution counters by one and
+ * computes last event time in order to match simulated candence and speed.
+ * Last event time is expressedd in 1/1024th of second units.
+ *
+ * 60 * 1024
+ * crank_dt =
[GitHub] mjurczak commented on a change in pull request #819: Feature/blecsc app: Cycling Speed and Cadence app
mjurczak commented on a change in pull request #819: Feature/blecsc app:
Cycling Speed and Cadence app
URL: https://github.com/apache/mynewt-core/pull/819#discussion_r169182831
##
File path: apps/blecsc/src/main.c
##
@@ -0,0 +1,323 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include
+#include
+#include
+#include
+
+#include "sysinit/sysinit.h"
+#include "os/os.h"
+#include "console/console.h"
+#include "config/config.h"
+#include "nimble/ble.h"
+#include "host/ble_hs.h"
+#include "services/gap/ble_svc_gap.h"
+#include "blecsc_sens.h"
+
+/* Wheel size for simulation calculations */
+#define CSC_SIM_WHEEL_CIRCUMFERENCE_MM2000
+/* Simulated cadence lower limit */
+#define CSC_SIM_CRANK_RPM_MIN 20
+/* Simulated cadence upper limit */
+#define CSC_SIM_CRANK_RPM_MAX 100
+/* Simulated speed lower limit */
+#define CSC_SIM_SPEED_KPH_MIN 0
+/* Simulated speed upper limit */
+#define CSC_SIM_SPEED_KPH_MAX 35
+
+/* Log data */
+struct log blecsc_log;
+
+/* Noticication status */
+static bool notify_state = false;
+
+/* Connection handle */
+static uint16_t conn_handle;
+
+static uint8_t blecsc_addr_type;
+
+/* Advertised device name */
+static const char *device_name = "blecsc_sensor";
+
+/* Advertised device appearance */
+static const uint16_t device_appearance = 1157;
+
+/* Measurement and notification timer */
+static struct os_callout blecsc_measure_timer;
+
+/* Variable holds current CSC measurement state */
+static struct ble_csc_measurement_state csc_measurement_state;
+
+/* Variable holds simulted speed (kilometers per hour) */
+static uint16_t csc_sim_speed_kph = CSC_SIM_SPEED_KPH_MIN;
+
+/* Variable holds simulated cadence (RPM) */
+static uint8_t csc_sim_crank_rpm = CSC_SIM_CRANK_RPM_MIN;
+
+
+static int blecsc_gap_event(struct ble_gap_event *event, void *arg);
+
+
+/*
+ * Enables advertising with parameters:
+ * o General discoverable mode
+ * o Undirected connectable mode
+ */
+static void
+blecsc_advertise(void)
+{
+struct ble_gap_adv_params adv_params;
+struct ble_hs_adv_fields fields;
+int rc;
+
+/*
+ * Set the advertisement data included in our advertisements:
+ * o Flags (indicates advertisement type and other general info)
+ * o Advertising tx power
+ * o Device name
+ */
+memset(&fields, 0, sizeof(fields));
+
+/*
+ * Advertise two flags:
+ * o Discoverability in forthcoming advertisement (general)
+ * o BLE-only (BR/EDR unsupported)
+ */
+fields.flags = BLE_HS_ADV_F_DISC_GEN |
+ BLE_HS_ADV_F_BREDR_UNSUP;
+
+/*
+ * Indicate that the TX power level field should be included; have the
+ * stack fill this value automatically. This is done by assigning the
+ * special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
+ */
+fields.tx_pwr_lvl_is_present = 1;
+fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
+
+fields.name = (uint8_t *)device_name;
+fields.name_len = strlen(device_name);
+fields.name_is_complete = 1;
+
+/*
+ * Set appearance to: Cycling Speed and Cadence Sensor.
+ */
+fields.appearance = device_appearance;
+fields.appearance_is_present = 1;
+
+rc = ble_gap_adv_set_fields(&fields);
+if (rc != 0) {
+BLECSC_LOG(ERROR, "error setting advertisement data; rc=%d\n", rc);
+return;
+}
+
+/* Begin advertising */
+memset(&adv_params, 0, sizeof(adv_params));
+adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
+adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
+rc = ble_gap_adv_start(blecsc_addr_type, NULL, BLE_HS_FOREVER,
+ &adv_params, blecsc_gap_event, NULL);
+if (rc != 0) {
+BLECSC_LOG(ERROR, "error enabling advertisement; rc=%d\n", rc);
+return;
+}
+}
+
+
+/* Update simulated CSC measurements.
+ * Each call increments wheel and crank revolution counters by one and
+ * computes last event time in order to match simulated candence and speed.
+ * Last event time is expressedd in 1/1024th of second units.
+ *
+ * 60 * 1024
+ * crank_dt =
