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-rw-r--r--.gitignore2
-rw-r--r--LICENSE674
-rw-r--r--Makefile.common31
-rw-r--r--README.md76
-rw-r--r--common/i2c_message.h10
-rwxr-xr-xfind-serial-port16
-rw-r--r--nrf52/Makefile22
-rw-r--r--nrf52/Makefile.feather-5283210
-rw-r--r--nrf52/Makefile.feather-5284010
-rw-r--r--nrf52/i2c_ring_buffer.cpp24
-rw-r--r--nrf52/i2c_ring_buffer.h21
-rw-r--r--nrf52/log.h17
-rw-r--r--nrf52/nrf52.ino94
-rw-r--r--nrf52/state_machine.cpp79
-rw-r--r--nrf52/state_machine.h28
-rw-r--r--samd/Makefile15
-rw-r--r--samd/Makefile.feather-m412
-rw-r--r--samd/Makefile.trinket-m010
-rw-r--r--samd/samd.ino109
-rw-r--r--usb2btle-breadboard.jpgbin0 -> 123034 bytes
-rw-r--r--usb2btle-breadboard.krabin0 -> 2444153 bytes
21 files changed, 1260 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f9aad73
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/*/build
+/*/cache
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
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+ The licenses for most software and other practical works are designed
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+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile.common b/Makefile.common
new file mode 100644
index 0000000..998e1b9
--- /dev/null
+++ b/Makefile.common
@@ -0,0 +1,31 @@
+# -*- mode: Makefile -*-
+
+SKETCHDIR = $(HOME)/Arduino
+PKGDIR = $(HOME)/.arduino15/packages
+ARDUINODIR = /usr/local/arduino
+ARM_GCC_PATH = /usr/local/gcc-arm-none-eabi/bin/
+
+BUILDDIR = ./build
+CACHEDIR = ./cache
+
+HARDWARE = -hardware $(ARDUINODIR)/hardware -hardware $(SKETCHDIR)/hardware
+TOOLS = -tools $(ARDUINODIR)/hardware/tools -tools $(ARDUINODIR)/tools-builder -tools $(PKGDIR)/arduino/tools
+LIBS = -libraries .. -libraries $(SKETCHDIR)/libraries
+PREFS = -prefs compiler.path=$(ARM_GCC_PATH) $(EXTRAPREFS)
+
+FLAGS = -compile -core-api-version 10609 -warnings none -quiet -build-cache $(CACHEDIR) -build-path $(BUILDDIR) -fqbn $(VENDOR):$(PLATFORM):$(BOARD) $(HARDWARE) $(TOOLS) $(LIBS) $(PREFS)
+
+$(BUILDDIR):
+ mkdir -p $(BUILDDIR)
+
+$(CACHEDIR):
+ mkdir -p $(CACHEDIR)
+
+clean:
+ rm -rf $(BUILDDIR) $(CACHEDIR)
+
+$(BUILDDIR)/%.ino.zip: %.ino $(BUILDDIR) $(CACHEDIR) Makefile ../Makefile.common
+ $(ARDUINODIR)/arduino-builder $(FLAGS) $<
+
+$(BUILDDIR)/%.ino.bin: %.ino $(BUILDDIR) $(CACHEDIR) Makefile ../Makefile.common
+ $(ARDUINODIR)/arduino-builder $(FLAGS) $<
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..183524e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,76 @@
+# USB2BTLE
+
+Convert boot-protocol from USB to Bluetooth LE.
+
+# Board support.
+
+The code is divided into a USB controller (in the `samd` directory)
+and a Bluetooth LE controller (in `nrf52`).
+
+The USB controller acts as an I²C master sending to the BTLE
+controller.
+
+## USB Controller (samd)
+
+ * Adafruit Trinket M0
+ * Adafruit Feather M4
+
+## BTLE Controller (nrf52)
+
+ * Adafruit Feather 52832
+ * Adafruit Feather 52840
+
+# Wiring
+
+| USB | BTLE |
+| ---------------- | ----------- |
+| USB Voltage | USB Voltage |
+| Ground | Ground |
+| SDA | SDA |
+| SCL | SCL |
+| Reset (optional) | Reset |
+
+![Trinket M0 and Feather 52840 wired together on a breadboard.][breadboard]
+
+[breadboard]: usb2btle-breadboard.jpg
+
+# Compiling/Flashing
+
+## This is only tested on Linux. You will need to make changes for other platforms.
+
+Edit the `Makefile` in `nrf52` and `samd` to select the appropriate
+include for your board. You may also need to edit `Makefile.common` in
+the root to specify paths to gcc-arm and various Arduino bits.
+
+You should follow the arduino setup instructions for your
+boards. While we're not using the Arduino IDE, we do rely on
+board support packages being installed.
+
+You will also need the SimplyAtomic library, available
+[here](https://github.com/wizard97/SimplyAtomic.git).
+
+Once everything's set up, you'll need to build and flash the images to
+your board. The instructions are the same for both:
+
+### Bluetooth controller:
+1. `cd nrf52`
+2. `make all flash`
+
+### USB controller:
+1. `cd samd`
+2. `make all flash`
+
+# TODO
+
+ * `samd`/`nrf` directory names should be changed.
+
+ * Makefile dependencies fixed so `make all` doesn't require a
+ `clean` when a non-ino file is changed.
+
+ * `find-serial-port` is Linux-only.
+
+ * `bossac` tool path isn't conditionalized sanely.
+
+ * Consumer key support.
+
+ * Report protocol support.
diff --git a/common/i2c_message.h b/common/i2c_message.h
new file mode 100644
index 0000000..c5b4e81
--- /dev/null
+++ b/common/i2c_message.h
@@ -0,0 +1,10 @@
+#ifndef I2C_MESSAGE_H
+#define I2C_MESSAGE_H
+
+#include <stdint.h>
+
+enum i2c_message_t {DBG = 0x00, KBD = 0x01, INVALID = 0xff};
+
+const uint8_t BTLE_WIREADDR = 4;
+
+#endif
diff --git a/find-serial-port b/find-serial-port
new file mode 100755
index 0000000..62e2c0c
--- /dev/null
+++ b/find-serial-port
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+if [ $# -ne 2 ]; then
+ echo "Usage: $0 vid pid" >&2
+ exit 1
+fi
+
+prefix=/dev/serial/by-id
+
+for dev in `ls $prefix`; do
+ if [ `udevadm info -q property --name $prefix/$dev | egrep -i "ID_VENDOR_ID=($1)|ID_MODEL_ID=($2)" | wc -l` -eq 2 ]; then
+ echo `readlink -f $prefix/$dev`
+ exit 0
+ fi
+done
+exit 2
diff --git a/nrf52/Makefile b/nrf52/Makefile
new file mode 100644
index 0000000..fdb47ee
--- /dev/null
+++ b/nrf52/Makefile
@@ -0,0 +1,22 @@
+include ../Makefile.common
+#include Makefile.feather-52840
+include Makefile.feather-52832
+
+SERIALPORT = $(shell ../find-serial-port $(USBVID) $(USBPID) || echo 'cant-find-serial-port')
+
+APP = nrf52
+
+all: $(BUILDDIR)/$(APP).ino.zip
+
+flash: $(BUILDDIR)/$(APP).ino.zip $(SERIALPORT)
+ adafruit-nrfutil dfu serial --package $(BUILDDIR)/$(APP).ino.zip -p $(SERIALPORT) -b 115200 -sb -t 1200
+
+console:
+ screen $(SERIALPORT) 115200
+
+# Deps
+nrf52.ino: i2c_ring_buffer.cpp state_machine.cpp log.h ../common/i2c_message.h
+
+i2c_ring_buffer.cpp: i2c_ring_buffer.h
+
+state_machine.cpp: state_machine.h
diff --git a/nrf52/Makefile.feather-52832 b/nrf52/Makefile.feather-52832
new file mode 100644
index 0000000..c2dff2b
--- /dev/null
+++ b/nrf52/Makefile.feather-52832
@@ -0,0 +1,10 @@
+# -*- mode: Makefile -*-
+
+VENDOR = adafruit
+PLATFORM = nrf52
+BOARD = feather52832
+
+EXTRAPREFS = -prefs "build.sd_flags=-DS132" -prefs "build.sd_name=s132" -prefs "build.sd_version=6.1.1" -prefs "build.sd_fwid=0x00B7"
+
+USBVID = 10c4
+USBPID = ea60
diff --git a/nrf52/Makefile.feather-52840 b/nrf52/Makefile.feather-52840
new file mode 100644
index 0000000..81d7245
--- /dev/null
+++ b/nrf52/Makefile.feather-52840
@@ -0,0 +1,10 @@
+# -*- mode: Makefile -*-
+
+VENDOR = adafruit
+PLATFORM = nrf52
+BOARD = feather52840
+
+EXTRAPREFS = -prefs "build.sd_name=s140" -prefs "build.sd_version=6.1.1" -prefs "build.sd_fwid=0x00B6"
+
+USBVID = 239a
+USBPID = '0029|8029'
diff --git a/nrf52/i2c_ring_buffer.cpp b/nrf52/i2c_ring_buffer.cpp
new file mode 100644
index 0000000..0f215f2
--- /dev/null
+++ b/nrf52/i2c_ring_buffer.cpp
@@ -0,0 +1,24 @@
+#include "i2c_ring_buffer.h"
+
+#include <SimplyAtomic.h>
+
+I2CRingBuffer::I2CRingBuffer(): head(0), tail(0) {}
+
+bool I2CRingBuffer::read(uint8_t *v) {
+ ATOMIC() {
+ if (this->head == this->tail) {
+ return false;
+ }
+
+ *v = this->buf[this->head];
+ this->head = (this->head + 1) % RINGBUFLEN;
+ return true;
+ }
+}
+
+void I2CRingBuffer::write(uint8_t v) {
+ ATOMIC() {
+ this->buf[this->tail] = v;
+ this->tail = (this->tail + 1) % RINGBUFLEN;
+ }
+}
diff --git a/nrf52/i2c_ring_buffer.h b/nrf52/i2c_ring_buffer.h
new file mode 100644
index 0000000..a274798
--- /dev/null
+++ b/nrf52/i2c_ring_buffer.h
@@ -0,0 +1,21 @@
+#ifndef I2C_RING_BUFFER_H
+#define I2C_RING_BUFFER_H
+
+#include <stdint.h>
+
+#define RINGBUFLEN 256
+
+class I2CRingBuffer {
+public:
+ I2CRingBuffer();
+
+ bool read(uint8_t *);
+ void write(uint8_t);
+
+private:
+ volatile uint8_t buf[RINGBUFLEN];
+ volatile uint8_t head;
+ volatile uint8_t tail;
+};
+
+#endif
diff --git a/nrf52/log.h b/nrf52/log.h
new file mode 100644
index 0000000..b78fec0
--- /dev/null
+++ b/nrf52/log.h
@@ -0,0 +1,17 @@
+#ifndef LOG_H
+#define LOG_H
+
+#define DEBUG 0
+#if DEBUG
+#define dbgPrint(...) Serial.print(__VA_ARGS__)
+#define dbgPrintf(...) Serial.printf(__VA_ARGS__)
+#define dbgPrintln(...) Serial.println(__VA_ARGS__)
+#define dbgWrite(...) Serial.write(__VA_ARGS__)
+#else
+#define dbgPrint(...)
+#define dbgPrintf(...)
+#define dbgPrintln(...)
+#define dbgWrite(...)
+#endif
+
+#endif
diff --git a/nrf52/nrf52.ino b/nrf52/nrf52.ino
new file mode 100644
index 0000000..1b4ac3c
--- /dev/null
+++ b/nrf52/nrf52.ino
@@ -0,0 +1,94 @@
+// -*- 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);
+ }
+}
diff --git a/nrf52/state_machine.cpp b/nrf52/state_machine.cpp
new file mode 100644
index 0000000..15e38b9
--- /dev/null
+++ b/nrf52/state_machine.cpp
@@ -0,0 +1,79 @@
+#include "state_machine.h"
+
+#include "i2c_message.h"
+#include "log.h"
+
+#include <Arduino.h>
+
+StateMachine::StateMachine(BLEHidAdafruit *blehid): currentState(WAIT_FOR_TYPE), blehid(blehid) {}
+
+void StateMachine::byteReceived(uint8_t inByte) {
+ dbgPrint("inByte=");
+ dbgPrintln(inByte);
+
+ switch (this->currentState) {
+ case WAIT_FOR_TYPE:
+ switch (inByte) {
+ case KBD:
+ digitalWrite(LED_BUILTIN, HIGH);
+ this->msgType = KBD;
+ break;
+
+ case DBG:
+ dbgPrint("T-M0: ");
+ this->msgType = DBG;
+ break;
+
+ default:
+ this->msgType = INVALID;
+ Serial.printf("Invalid message type: %ud.\r\n", inByte);
+ }
+
+ this->currentState = WAIT_FOR_LEN;
+ break;
+
+ case WAIT_FOR_LEN:
+ dbgPrintf("msg len: %u\r\n", inByte);
+ this->msgLen = inByte;
+ this->msgCount = 0;
+
+ if (this->msgLen == 0) {
+ this->currentState = WAIT_FOR_TYPE;
+ } else {
+ this->currentState = WAIT_FOR_DATA;
+ }
+ break;
+
+ case WAIT_FOR_DATA:
+ dbgPrintf("data: %02x\r\n", inByte);
+ switch (this->msgType) {
+ case KBD:
+ this->message[this->msgCount++ % sizeof(this->message)] = inByte;
+ break;
+
+ case DBG:
+ dbgPrint(inByte);
+ break;
+ }
+
+ if (this->msgCount == this->msgLen) {
+ switch (this->msgType) {
+ case KBD:
+ dbgPrintln("sending kbd report");
+ this->blehid->keyboardReport(this->message[0], &this->message[2]);
+ digitalWrite(LED_BUILTIN, LOW);
+ break;
+
+ case DBG:
+ dbgPrintln();
+ break;
+ }
+ this->currentState = WAIT_FOR_TYPE;
+ }
+ break;
+
+ default:
+ Serial.printf("Invalid message state: %ud.\r\n", this->currentState);
+ break;
+ }
+}
diff --git a/nrf52/state_machine.h b/nrf52/state_machine.h
new file mode 100644
index 0000000..d972926
--- /dev/null
+++ b/nrf52/state_machine.h
@@ -0,0 +1,28 @@
+#ifndef STATE_MACHINE_H
+#define STATE_MACHINE_H
+
+#include "i2c_message.h"
+
+#include <bluefruit.h>
+
+#include <stdint.h>
+
+#define MAX_MSG_LEN 32
+
+enum state_t {WAIT_FOR_TYPE, WAIT_FOR_LEN, WAIT_FOR_DATA};
+
+class StateMachine {
+public:
+ StateMachine(BLEHidAdafruit *);
+ void byteReceived(uint8_t);
+
+private:
+ state_t currentState;
+ uint8_t message[MAX_MSG_LEN];
+ uint8_t msgLen, msgCount;
+ i2c_message_t msgType;
+
+ BLEHidAdafruit *blehid;
+};
+
+#endif
diff --git a/samd/Makefile b/samd/Makefile
new file mode 100644
index 0000000..314396c
--- /dev/null
+++ b/samd/Makefile
@@ -0,0 +1,15 @@
+include ../Makefile.common
+include Makefile.feather-m4
+#include Makefile.trinket-m0
+
+SERIALPORT = $(shell ../find-serial-port $(USBVID) $(USBPID) || echo cant-find-serial-port)
+
+APP = samd
+
+all: $(BUILDDIR)/$(APP).ino.bin
+
+flash: $(BUILDDIR)/$(APP).ino.bin $(SERIALPORT)
+ $(PKGDIR)/arduino/tools/bossac/1.8.0-48-gb176eee/bossac -R -e -w -v -o$(IMGOFFSET) -p$(SERIALPORT) $<
+
+console:
+ screen $(SERIALPORT) 115200
diff --git a/samd/Makefile.feather-m4 b/samd/Makefile.feather-m4
new file mode 100644
index 0000000..b8c15ec
--- /dev/null
+++ b/samd/Makefile.feather-m4
@@ -0,0 +1,12 @@
+# -*- mode: Makefile -*-
+
+VENDOR = adafruit
+PLATFORM = samd
+BOARD = adafruit_feather_m4
+
+EXTRAPREFS = -prefs "build.f_cpu=120000000L"
+
+USBVID = 239a
+USBPID = 0022
+
+IMGOFFSET = 0x4000
diff --git a/samd/Makefile.trinket-m0 b/samd/Makefile.trinket-m0
new file mode 100644
index 0000000..1c37abb
--- /dev/null
+++ b/samd/Makefile.trinket-m0
@@ -0,0 +1,10 @@
+# -*- mode: Makefile -*-
+
+VENDOR = adafruit
+PLATFORM = samd
+BOARD = adafruit_trinket_m0
+
+USBVID = 239a
+USBPID = '001e|801e'
+
+IMGOFFSET = 0x2000
diff --git a/samd/samd.ino b/samd/samd.ino
new file mode 100644
index 0000000..a09cb5e
--- /dev/null
+++ b/samd/samd.ino
@@ -0,0 +1,109 @@
+// -*- mode: c++ -*-
+
+#include "i2c_message.h"
+
+#include <hidboot.h>
+#include <usbhub.h>
+#include <Wire.h>
+
+#ifdef ADAFRUIT_TRINKET_M0
+#include <Adafruit_DotStar.h>
+
+const uint8_t NUMPIXELS = 1;
+const uint8_t DATAPIN = 7;
+const uint8_t CLOCKPIN = 8;
+
+Adafruit_DotStar px(NUMPIXELS, DATAPIN, CLOCKPIN);
+
+
+void initTXLED() {
+}
+
+void turnOffTXLED() {
+ px.clear();
+ px.show();
+}
+
+void turnOnTXLED() {
+ px.setPixelColor(0, 63, 63, 0);
+ px.show();
+}
+#else // ADAFRUIT_TRINKET_M0
+void initTXLED() {
+ pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void turnOffTXLED() {
+ digitalWrite(LED_BUILTIN, HIGH);
+}
+
+void turnOnTXLED() {
+ digitalWrite(LED_BUILTIN, LOW);
+}
+#endif // ADAFRUIT_TRINKET_M0
+
+void dbg(char *msg) {
+ uint8_t len = strlen(msg);
+
+ Wire.beginTransmission(BTLE_WIREADDR);
+ Wire.write(DBG);
+ Wire.write(len);
+ Wire.write(msg);
+ Wire.endTransmission();
+}
+
+class KeyboardRaw: public KeyboardReportParser {
+public:
+ void Parse(HID *hid, uint32_t is_rpt_id, uint32_t len, uint8_t *buf);
+};
+
+void KeyboardRaw::Parse(HID *hid, uint32_t is_rpt_id, uint32_t len, uint8_t *buf) {
+ turnOnTXLED();
+
+ KeyboardReportParser::Parse(hid, is_rpt_id, len, buf);
+
+ Wire.beginTransmission(BTLE_WIREADDR);
+ Wire.write(KBD);
+ Wire.write(len);
+ Wire.write(buf, len);
+ Wire.endTransmission();
+
+ turnOffTXLED();
+}
+
+USBHost usb;
+USBHub hub(&usb);
+HIDBoot<HID_PROTOCOL_KEYBOARD> hidKeyBoard(&usb);
+KeyboardRaw parser;
+
+void setup() {
+ initTXLED();
+ turnOffTXLED();
+
+ Wire.begin();
+
+ dbg("Booting\r\n");
+
+ if (usb.Init()) {
+ dbg("USB Host did not start!\r\n");
+ while (true) {
+ digitalWrite(LED_BUILTIN, HIGH);
+ delay(125);
+ digitalWrite(LED_BUILTIN, LOW);
+ delay(125);
+ digitalWrite(LED_BUILTIN, HIGH);
+ delay(125);
+ digitalWrite(LED_BUILTIN, LOW);
+ delay(125);
+
+ delay(500);
+ }
+ }
+
+ hidKeyBoard.SetReportParser(0, &parser);
+}
+
+void loop() {
+ asm("wfe \n");
+ usb.Task();
+}
diff --git a/usb2btle-breadboard.jpg b/usb2btle-breadboard.jpg
new file mode 100644
index 0000000..854b0d6
--- /dev/null
+++ b/usb2btle-breadboard.jpg
Binary files differ
diff --git a/usb2btle-breadboard.kra b/usb2btle-breadboard.kra
new file mode 100644
index 0000000..e7c2135
--- /dev/null
+++ b/usb2btle-breadboard.kra
Binary files differ
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 11:57:33 +0000