125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
#include "pxt.h"
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using namespace pxt;
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//% color=270 weight=34
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namespace radio {
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// -------------------------------------------------------------------------
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// Radio
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// -------------------------------------------------------------------------
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bool radioEnabled = false;
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PacketBuffer packet;
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int radioEnable() {
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int r = uBit.radio.enable();
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if (r != MICROBIT_OK) return r;
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if (!radioEnabled) {
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uBit.radio.setGroup(pxt::programHash());
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radioEnabled = true;
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}
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return r;
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}
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void broadcastMessage(int message) {
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if (radioEnable() != MICROBIT_OK) return;
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uBit.radio.event.eventReceived(MicroBitEvent(MES_BROADCAST_GENERAL_ID, message, CREATE_ONLY));
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}
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void onBroadcastMessageReceived(int message, Action f) {
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if (radioEnable() != MICROBIT_OK) return;
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registerWithDal(MES_BROADCAST_GENERAL_ID, message, f);
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}
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/**
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* Broadcasts 4 numbers over radio to any connected micro:bit in the group.
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*/
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//% help=radio/send-numbers
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//% weight=59
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//% blockId=radio_datagram_send_numbers block="send numbers|0: %VALUE0|1: %VALUE1|2: %VALUE2|3: %VALUE3"
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void sendNumbers(int value_0, int value_1, int value_2, int value_3) {
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if (radioEnable() != MICROBIT_OK) return;
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int buf[] = { value_0, value_1, value_2, value_3 };
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uBit.radio.datagram.send((uint8_t*)buf, 4*sizeof(int));
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}
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/**
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* Registers code to run when a packet is received over radio.
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*/
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//% help=radio/on-data-received
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//% weight=50
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//% blockId=radio_datagram_received_event block="on data received" blockGap=8
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void onDataReceived(Action body) {
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if (radioEnable() != MICROBIT_OK) return;
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registerWithDal(MICROBIT_ID_RADIO, MICROBIT_RADIO_EVT_DATAGRAM, body);
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}
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/**
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* Reads a number at a given index, between ``0`` and ``3``, from the packet received by ``receive number``. Not supported in simulator.
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* @param index index of the number to read from 0 to 3. 1 eg
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*/
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//% help=radio/received-number-at
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//% weight=45
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//% blockId=radio_datagram_received_number_at block="receive number|at %VALUE" blockGap=8
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int receivedNumberAt(int index) {
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if (radioEnable() != MICROBIT_OK) return 0;
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if (0 <= index && index < packet.length() / 4) {
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// packet.getBytes() is not aligned
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int r;
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memcpy(&r, packet.getBytes() + index * 4, 4);
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return r;
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}
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return 0;
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}
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/**
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* Reads the next packet as a number from the radio queue.
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*/
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//% help=radio/receive-number
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//% weight=46
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//% blockId=radio_datagram_receive block="receive number" blockGap=8
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int receiveNumber()
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{
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if (radioEnable() != MICROBIT_OK) return 0;
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packet = uBit.radio.datagram.recv();
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return receivedNumberAt(0);
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}
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/**
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* Gets the received signal strength indicator (RSSI) from the packet received by ``receive number``. Not supported in simulator.
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* namespace=radio
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*/
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//% help=radio/received-signal-strength
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//% weight=40
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//% blockId=radio_datagram_rssi block="received signal strength"
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int receivedSignalStrength() {
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if (radioEnable() != MICROBIT_OK) return 0;
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return packet.getRSSI();
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}
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/**
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* Sets the group id for radio communications. A micro:bit can only listen to one group ID at any time.
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* @ param id the group id between ``0`` and ``255``, 1 eg
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*/
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//% help=radio/set-group
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//% weight=10
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//% blockId=radio_set_group block="set group %ID"
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void setGroup(int id) {
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if (radioEnable() != MICROBIT_OK) return;
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uBit.radio.setGroup(id);
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}
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/**
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* Change the output power level of the transmitter to the given value.
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* @param power a value in the range 0..7, where 0 is the lowest power and 7 is the highest, 7 eg
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*/
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//% help=radio/set-transmit-power
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//% weight=9
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//% blockId=radio_set_transmit_power block="set transmit power %power"
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void setTransmitPower(int power) {
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if (radioEnable() != MICROBIT_OK) return;
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uBit.radio.setTransmitPower(power);
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}
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}
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