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// -*- mode: c++ -*-
#include "i2c_message.h"
#include "i2c_ring_buffer.h"
#include "log.h"
#include "state_machine.h"
#include <bluefruit.h>
#include <Wire.h>
BLEDis bledis;
BLEHidAdafruit blehid;
I2CRingBuffer rb;
StateMachine fsm(&blehid);
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
pinMode(PIN_WIRE_SDA, INPUT_PULLUP);
pinMode(PIN_WIRE_SCL, INPUT_PULLUP);
Serial.begin(115200);
Serial.println("usb2btle booting.");
Wire.begin(BTLE_WIREADDR);
Wire.onReceive(wireDataReceived);
Bluefruit.begin();
Bluefruit.setTxPower(4);
Bluefruit.setName("usb2btle");
// Configure and Start Device Information Service
bledis.setManufacturer("Kublai Khansulting");
bledis.setModel("devel-nrf52832-trinketm0");
bledis.begin();
/* Start BLE HID
* Note: Apple requires BLE device must have min connection interval >= 20m
* ( The smaller the connection interval the faster we could send data).
* However for HID and MIDI device, Apple could accept min connection interval
* up to 11.25 ms. Therefore BLEHidAdafruit::begin() will try to set the min and max
* connection interval to 11.25 ms and 15 ms respectively for best performance.
*/
blehid.begin();
blehid.setKeyboardLedCallback(setKeyboardLED);
startAdv();
digitalWrite(LED_BUILTIN, LOW);
}
void startAdv(void)
{
Serial.println("Advertising HID.");
Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
Bluefruit.Advertising.addTxPower();
Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_HID_KEYBOARD);
Bluefruit.Advertising.addService(blehid);
Bluefruit.Advertising.addName();
Bluefruit.Advertising.restartOnDisconnect(true);
Bluefruit.Advertising.setInterval(32, 244);
Bluefruit.Advertising.setFastTimeout(30);
Bluefruit.Advertising.start(0);
}
void loop() {
waitForEvent();
uint8_t v;
while (rb.read(&v)) {
dbgPrintf("got byte on rb: %02x\r\n", v);
fsm.byteReceived(v);
}
}
void wireDataReceived(int numBytes) {
dbgPrintf("wireDataReceived: %u\r\n", numBytes);
for (int i = 0; i < numBytes; i++) {
rb.write(Wire.read());
}
}
void setKeyboardLED(uint16_t conn_handle, uint8_t led_bitmap) {
(void) conn_handle;
// light up Red Led if any bits is set
if (led_bitmap) {
ledOn(LED_RED);
} else {
ledOff(LED_RED);
}
}
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