BLE to UART
Dependencies: BLE_API Buffer mbed nRF51822
Fork of BLE_LoopbackUART by
main.cpp
- Committer:
- yihui
- Date:
- 2015-05-22
- Revision:
- 12:f86bdebbebe8
- Parent:
- 10:633cec718bf4
File content as of revision 12:f86bdebbebe8:
/* 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 "BLEDevice.h" #include "UARTService.h" #include "DFUService.h" #include "Buffer.h" #define NEED_CONSOLE_OUTPUT 0 /* 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(...) { printf(__VA_ARGS__); } #else #define DEBUG(...) /* nothing */ #endif /* #if NEED_CONSOLE_OUTPUT */ Buffer <char> uartRxBuffer(0x100); //Serial uart(p8, p7); Serial uart(USBTX, USBRX); BLEDevice ble; DigitalOut led1(p28); UARTService *uartServicePtr; uint8_t bleIsConnected = 0; uint8_t bleTxFlag = 0; bool rxPayloadUpdated = false; uint8_t rxPayload[20 + 1] = {0,}; uint8_t txPayload[20 + 1] = {0,}; void uart2ble(void) { uint16_t bytesToWrite = 0; for (int i = 0; i < 20; i++) { if (uartRxBuffer.available()) { txPayload[bytesToWrite] = uartRxBuffer; bytesToWrite++; } } if (bytesToWrite != 0) { bleTxFlag = 1; ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), txPayload, bytesToWrite); } else { bleTxFlag = 0; } } void resetToRunBootloader() { DEBUG("Reset to run bootloader\r\n"); NRF_POWER->GPREGRET = 0x02; NVIC_SystemReset(); } void connectionCallback(Gap::Handle_t, Gap::addr_type_t peerAddrType, const Gap::address_t peerAddr, const Gap::ConnectionParams_t *) { DEBUG("Connected\r\n"); bleIsConnected = 1; bleTxFlag = 0; } void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason) { DEBUG("Disconnected!\n\r"); DEBUG("Restarting the advertising process\n\r"); bleTxFlag = 0; bleIsConnected = 0; ble.startAdvertising(); } void onDataWritten(const GattCharacteristicWriteCBParams *params) { if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) { uint16_t bytesRead = params->len; DEBUG("received %u bytes\n\r", bytesRead); // ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead); for (int i = 0; i < bytesRead; i++) { uart.putc(params->data[i]); } } } void onDataSent(unsigned count) { DEBUG("onDataSent\r\n"); uart2ble(); } void periodicCallback(void) { led1 = !led1; } int main(void) { led1 = 1; Ticker ticker; ticker.attach(periodicCallback, 0.01); DEBUG("Initialising the nRF51822\n\r"); ble.init(); ble.onConnection(connectionCallback); ble.onDisconnection(disconnectionCallback); ble.onDataWritten(onDataWritten); ble.onDataSent(onDataSent); /* 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(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000)); ble.startAdvertising(); DFUService dfuService(ble); UARTService uartService(ble); uartServicePtr = &uartService; while (true) { uint32_t timeout = 1000; while (timeout) { timeout--; if (uart.readable()) { uartRxBuffer.put((char)uart.getc()); timeout = 1000; } } if (bleIsConnected && bleTxFlag == 0 && uartRxBuffer.available()) { uart2ble(); bleTxFlag = 1; } } } extern "C" void HardFault_Handler() { NVIC_SystemReset(); }