Using the BLE Loopback UART based program to work with LSM9DS1 sensor
Dependencies: BLE_API LSM9DS1 mbed nRF51822
Diff: main.cpp
- Revision:
- 0:d0291b4a856a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Fri Jun 17 22:14:12 2016 +0000 @@ -0,0 +1,118 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed 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 "mbed.h" +#include "ble/BLE.h" + +#include "ble/services/UARTService.h" +#include "LSM9DS1/LSM9DS1.h" + +LSM9DS1 imu(p30, p7); +Serial pc(p9, p11); + +#define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console; + * it will have an impact on code-size and power consumption. */ + +#if NEED_CONSOLE_OUTPUT +#define DEBUG(...) { pc.printf(__VA_ARGS__); } +#else +#define DEBUG(...) /* nothing */ +#endif /* #if NEED_CONSOLE_OUTPUT */ + +BLEDevice ble; +DigitalOut led1(LED1); + +UARTService *uartServicePtr; + +void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) +{ + DEBUG("Disconnected!\n\r"); + DEBUG("Restarting the advertising process\n\r"); + ble.startAdvertising(); +} + +void onDataWritten(const GattWriteCallbackParams *params) +{ + if ((uartServicePtr != NULL) && (params->handle == uartServicePtr->getTXCharacteristicHandle())) { + uint16_t bytesRead = params->len; + uint8_t value = *(params->data); + uint16_t status; + DEBUG("received %u bytes\n\r", bytesRead); + DEBUG("recevied %d data\n\r", value); + + switch(value) { + case 49: + DEBUG("Off power\n\r"); + status = imu.begin(imu.G_SCALE_245DPS, imu.A_SCALE_2G, imu.M_SCALE_4GS, + imu.G_POWER_DOWN, imu.A_POWER_DOWN, imu.M_ODR_0625); + break; + case 50: + DEBUG("Low power\n\r"); + status = imu.begin(imu.G_SCALE_245DPS, imu.A_SCALE_2G, imu.M_SCALE_4GS, + imu.G_ODR_15_BW_0, imu.A_POWER_DOWN, imu.M_ODR_0625); + break; + case 51: + DEBUG("High power\n\r"); + status = imu.begin(imu.G_SCALE_2000DPS, imu.A_SCALE_8G, imu.M_SCALE_16GS, + imu.G_ODR_952_BW_100, imu.A_ODR_952, imu.M_ODR_80); + break; + default: + DEBUG("Nothing happened\n\r"); + break; + } + + pc.printf("LSM9DS1 WHO_AM_I's returned: 0x%X\r\n", status); + pc.printf("Should be 0x683D\r\n"); + + ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead); + } +} + +void periodicCallback(void) +{ + led1 = !led1; +} + +int main(void) +{ + led1 = 1; + Ticker ticker; + ticker.attach(periodicCallback, 1); + + DEBUG("Initialising the nRF51822\n\r"); + pc.printf("PC: Initialising the nRF51822\n\r"); + ble.init(); + ble.onDisconnection(disconnectionCallback); + ble.onDataWritten(onDataWritten); + + /* setup advertising */ + ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED); + ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); + ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, + (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1); + ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS, + (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed)); + + ble.setAdvertisingInterval(1000); /* 1000ms; in multiples of 0.625ms. */ + ble.startAdvertising(); + + UARTService uartService(ble); + uartServicePtr = &uartService; + + while (true) { + ble.waitForEvent(); + } +}