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main.cpp
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main.cpp
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#include "MicroBit.h"
MicroBit uBit;
uint8_t tx_power_level = 6;
#define MANUFACTURER_TESTING_LO (0xFF)
#define MANUFACTURER_TESTING_HI (0xFF)
#define SIGNATURE_LO (0x39)
#define SIGNATURE_HI (0xA8)
#define RELEASE_NUMBER (1) // limit 255
#define API_ID (3) // limit 255
#define FLAGS_INTENDED_RECEIVER_ASSIGNED (0x08)
#define FLAGS_TOGGLE_COUNTER_HAS_WRAPPED (0x04)
#define FLAGS_BUTTON_A (0x02)
#define FLAGS_BUTTON_B (0x01)
#define FLAGS_NONE (0x00)
struct
{
uint8_t manufacturer[2];
uint8_t signature[2];
uint8_t apiId;
uint8_t releaseNumber;
uint8_t intendedReceiverBluetoothMac[6];
uint8_t flags;
uint8_t lowerEightBitsToggleCounter;
uint8_t upperEightBitsToggleCounter;
uint8_t toggleHistory[11];
} BleAdvPacketApi = {MANUFACTURER_TESTING_LO, MANUFACTURER_TESTING_HI,
SIGNATURE_LO, SIGNATURE_HI,
API_ID,
RELEASE_NUMBER,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // intended receiver bluetooth mac
FLAGS_NONE,
0, // toggle counter
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; // toggle history
uint8_t buttonsState = FLAGS_NONE; // uses FLAGS_BUTTON_A and FLAGS_BUTTON_B
uint16_t toggleCounter = 0;
uint8_t toggleCounterHasWrapped = 0;
char digit(uint8_t n)
{
return '0' + n;
}
void fail(ManagedString message)
{
uBit.display.scroll("FAIL " + message, 200);
}
void startAdvertising()
{
int connectable = 0;
int interval = 160;
uBit.bleManager.setTransmitPower(tx_power_level);
uBit.bleManager.ble->setAdvertisingType(connectable ? GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED : GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
uBit.bleManager.ble->setAdvertisingInterval(interval);
uBit.bleManager.ble->clearAdvertisingPayload();
uBit.bleManager.ble->accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
uBit.bleManager.ble->accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t*) &BleAdvPacketApi, sizeof(BleAdvPacketApi));
uBit.bleManager.ble->startAdvertising();
if (sizeof(BleAdvPacketApi) == 26)
uBit.display.scrollAsync("ULTIBO BUTTONS V1", 90);
else
fail("ULTIBO PACK");
}
char text[] = "?";
void onButton(MicroBitEvent e)
{
uint8_t toggleHistoryWhichButton = 0;
uint8_t mask = 0;
uint8_t previousButtonsState = buttonsState;
if (e.source == MICROBIT_ID_BUTTON_A)
{
mask = FLAGS_BUTTON_A;
toggleHistoryWhichButton = 0;
}
else if (e.source == MICROBIT_ID_BUTTON_B)
{
mask = FLAGS_BUTTON_B;
toggleHistoryWhichButton = 1;
}
if (e.value == MICROBIT_BUTTON_EVT_DOWN)
buttonsState |= mask;
else if (e.value == MICROBIT_BUTTON_EVT_UP)
buttonsState &= ~mask;
if (buttonsState != previousButtonsState)
{
uBit.bleManager.ble->clearAdvertisingPayload();
uBit.bleManager.ble->accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
toggleCounter = toggleCounter + 1;
toggleCounterHasWrapped |= toggleCounter == 0;
BleAdvPacketApi.flags = buttonsState;
BleAdvPacketApi.lowerEightBitsToggleCounter = toggleCounter & 0xFF;
BleAdvPacketApi.upperEightBitsToggleCounter = (toggleCounter >> 8) & 0xFF;
if (toggleCounterHasWrapped)
{
BleAdvPacketApi.flags |= FLAGS_TOGGLE_COUNTER_HAS_WRAPPED;
}
for (int i = sizeof(BleAdvPacketApi.toggleHistory); i >= 1; i--)
{
BleAdvPacketApi.toggleHistory[i] = ((BleAdvPacketApi.toggleHistory[i] >> 1) & 0x7f) | ((BleAdvPacketApi.toggleHistory[i - 1] & 0x01) << 7);
}
BleAdvPacketApi.toggleHistory[0] = ((BleAdvPacketApi.toggleHistory[0] >> 1) & 0x7f) | (toggleHistoryWhichButton << 7);
uBit.bleManager.ble->accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t*) &BleAdvPacketApi, sizeof(BleAdvPacketApi));
if (buttonsState == FLAGS_NONE)
text[0] = ' ';
else if (buttonsState == FLAGS_BUTTON_A)
text[0] = 'A';
else if (buttonsState == FLAGS_BUTTON_B)
text[0] = 'B';
else if (buttonsState == (FLAGS_BUTTON_A | FLAGS_BUTTON_B))
text[0] = '2';
else
text[0] = '?';
uBit.display.printAsync(text);
}
}
int main()
{
uBit.init();
uBit.messageBus.listen(MICROBIT_ID_BUTTON_A, MICROBIT_EVT_ANY, onButton);
uBit.messageBus.listen(MICROBIT_ID_BUTTON_B, MICROBIT_EVT_ANY, onButton);
startAdvertising();
release_fiber();
}