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allwpilib/simulation/halsim_ds_socket/src/main/native/cpp/DSCommPacket.cpp
Tyler Veness f432f65bef Update copyright year in license to 2019 (#1524)
Also update clang-format to 6.0.
2019-05-17 17:35:09 -07:00

313 lines
9.1 KiB
C++

/*----------------------------------------------------------------------------*/
/* Copyright (c) 2018-2019 FIRST. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
/*----------------------------------------------------------------------------*/
#include "DSCommPacket.h"
#include <algorithm>
#include <chrono>
#include <cstring>
#include <iostream>
#include <thread>
#include <vector>
#include <mockdata/DriverStationData.h>
#include <mockdata/MockHooks.h>
#include <wpi/ArrayRef.h>
#include <wpi/Format.h>
using namespace halsim;
DSCommPacket::DSCommPacket() {
for (auto& i : m_joystick_packets) {
i.ResetTcp();
i.ResetUdp();
}
matchInfo.gameSpecificMessageSize = 0;
}
/*----------------------------------------------------------------------------
** The following methods help parse and hold information about the
** driver station and it's joysticks.
**--------------------------------------------------------------------------*/
void DSCommPacket::SetControl(uint8_t control, uint8_t request) {
std::memset(&m_control_word, 0, sizeof(m_control_word));
m_control_word.enabled = (control & kEnabled) != 0;
m_control_word.autonomous = (control & kAutonomous) != 0;
m_control_word.test = (control & kTest) != 0;
m_control_word.eStop = (control & kEmergencyStop) != 0;
m_control_word.fmsAttached = (control & kFMS_Attached) != 0;
m_control_word.dsAttached = (request & kRequestNormalMask) != 0;
m_control_sent = control;
}
void DSCommPacket::SetAlliance(uint8_t station_code) {
m_alliance_station = static_cast<HAL_AllianceStationID>(station_code);
}
void DSCommPacket::ReadMatchtimeTag(wpi::ArrayRef<uint8_t> tagData) {
if (tagData.size() < 6) return;
uint32_t store = tagData[2] << 24;
store |= tagData[3] << 16;
store |= tagData[4] << 8;
store |= tagData[5];
static_assert(sizeof(uint32_t) == sizeof(float), "float must be 32 bits");
float matchTime = 0;
std::memcpy(&matchTime, &store, sizeof(float));
m_match_time = matchTime;
}
void DSCommPacket::ReadJoystickTag(wpi::ArrayRef<uint8_t> dataInput,
int index) {
DSCommJoystickPacket& stick = m_joystick_packets[index];
stick.ResetUdp();
if (dataInput.size() == 2) {
return;
}
dataInput = dataInput.slice(2);
// Read axes
int axesLength = dataInput[0];
for (int i = 0; i < axesLength; i++) {
int8_t value = dataInput[1 + i];
if (value < 0) {
stick.axes.axes[i] = value / 128.0;
} else {
stick.axes.axes[i] = value / 127.0;
}
}
stick.axes.count = axesLength;
dataInput = dataInput.slice(1 + axesLength);
// Read Buttons
int buttonCount = dataInput[0];
int numBytes = (buttonCount + 7) / 8;
stick.buttons.buttons = 0;
for (int i = 0; i < numBytes; i++) {
stick.buttons.buttons |= dataInput[numBytes - i] << (8 * (i));
}
stick.buttons.count = buttonCount;
dataInput = dataInput.slice(1 + numBytes);
int povsLength = dataInput[0];
for (int i = 0; i < povsLength * 2; i += 2) {
stick.povs.povs[i] = (dataInput[1 + i] << 8) | dataInput[2 + i];
}
stick.povs.count = povsLength;
return;
}
/*----------------------------------------------------------------------------
** Communication methods
**--------------------------------------------------------------------------*/
void DSCommPacket::DecodeTCP(wpi::ArrayRef<uint8_t> packet) {
// No header
while (!packet.empty()) {
int tagLength = packet[0] << 8 | packet[1];
auto tagPacket = packet.slice(0, tagLength + 2);
if (tagLength == 0) {
return;
}
switch (packet[2]) {
case kJoystickNameTag:
ReadJoystickDescriptionTag(tagPacket);
break;
case kGameDataTag:
ReadGameSpecificMessageTag(tagPacket);
break;
case kMatchInfoTag:
ReadNewMatchInfoTag(tagPacket);
break;
}
packet = packet.slice(tagLength + 2);
}
}
void DSCommPacket::DecodeUDP(wpi::ArrayRef<uint8_t> packet) {
if (packet.size() < 6) return;
// Decode fixed header
m_hi = packet[0];
m_lo = packet[1];
// Comm Version is packet 2, ignore
SetControl(packet[3], packet[4]);
SetAlliance(packet[5]);
// Return if packet finished
if (packet.size() == 6) return;
// Else, handle tagged data
packet = packet.slice(6);
int joystickNum = 0;
// Loop to handle multiple tags
while (!packet.empty()) {
auto tagLength = packet[0];
auto tagPacket = packet.slice(0, tagLength + 1);
switch (packet[1]) {
case kJoystickDataTag:
ReadJoystickTag(tagPacket, joystickNum);
joystickNum++;
break;
case kMatchTimeTag:
ReadMatchtimeTag(tagPacket);
break;
}
packet = packet.slice(tagLength + 1);
}
}
void DSCommPacket::ReadNewMatchInfoTag(wpi::ArrayRef<uint8_t> data) {
// Size 2 bytes, tag 1 byte
if (data.size() <= 3) return;
int nameLength = std::min<size_t>(data[3], sizeof(matchInfo.eventName) - 1);
for (int i = 0; i < nameLength; i++) {
matchInfo.eventName[i] = data[4 + i];
}
matchInfo.eventName[nameLength] = '\0';
data = data.slice(4 + nameLength);
if (data.size() < 4) return;
matchInfo.matchType = static_cast<HAL_MatchType>(
data[0]); // None, Practice, Qualification, Elimination, Test
matchInfo.matchNumber = (data[1] << 8) | data[2];
matchInfo.replayNumber = data[3];
HALSIM_SetMatchInfo(&matchInfo);
}
void DSCommPacket::ReadGameSpecificMessageTag(wpi::ArrayRef<uint8_t> data) {
// Size 2 bytes, tag 1 byte
if (data.size() <= 3) return;
int length = std::min<size_t>(((data[0] << 8) | data[1]) - 1,
sizeof(matchInfo.gameSpecificMessage));
for (int i = 0; i < length; i++) {
matchInfo.gameSpecificMessage[i] = data[3 + i];
}
matchInfo.gameSpecificMessageSize = length;
HALSIM_SetMatchInfo(&matchInfo);
}
void DSCommPacket::ReadJoystickDescriptionTag(wpi::ArrayRef<uint8_t> data) {
if (data.size() < 3) return;
data = data.slice(3);
int joystickNum = data[0];
DSCommJoystickPacket& packet = m_joystick_packets[joystickNum];
packet.ResetTcp();
packet.descriptor.isXbox = data[1] != 0 ? 1 : 0;
packet.descriptor.type = data[2];
int nameLength =
std::min<size_t>(data[3], (sizeof(packet.descriptor.name) - 1));
for (int i = 0; i < nameLength; i++) {
packet.descriptor.name[i] = data[4 + i];
}
data = data.slice(4 + nameLength);
packet.descriptor.name[nameLength] = '\0';
int axesCount = data[0];
packet.descriptor.axisCount = axesCount;
for (int i = 0; i < axesCount; i++) {
packet.descriptor.axisTypes[i] = data[1 + i];
}
data = data.slice(1 + axesCount);
packet.descriptor.buttonCount = data[0];
packet.descriptor.povCount = data[1];
}
void DSCommPacket::SendJoysticks(void) {
for (int i = 0; i < HAL_kMaxJoysticks; i++) {
DSCommJoystickPacket& packet = m_joystick_packets[i];
HALSIM_SetJoystickAxes(i, &packet.axes);
HALSIM_SetJoystickPOVs(i, &packet.povs);
HALSIM_SetJoystickButtons(i, &packet.buttons);
HALSIM_SetJoystickDescriptor(i, &packet.descriptor);
}
}
void DSCommPacket::SetupSendBuffer(wpi::raw_uv_ostream& buf) {
SetupSendHeader(buf);
SetupJoystickTag(buf);
}
void DSCommPacket::SetupSendHeader(wpi::raw_uv_ostream& buf) {
static constexpr uint8_t kCommVersion = 0x01;
// High low packet index, comm version
buf << m_hi << m_lo << kCommVersion;
// Control word and status check
buf << m_control_sent
<< static_cast<uint8_t>(HALSIM_GetProgramStarted() ? kRobotHasCode : 0);
// Battery voltage high and low
buf << static_cast<uint8_t>(12) << static_cast<uint8_t>(0);
// Request (Always 0)
buf << static_cast<uint8_t>(0);
}
void DSCommPacket::SetupJoystickTag(wpi::raw_uv_ostream& buf) {
static constexpr uint8_t kHIDTag = 0x01;
// HID tags are sent 1 per device
int64_t outputs;
int32_t rightRumble;
int32_t leftRumble;
for (size_t i = 0; i < m_joystick_packets.size(); i++) {
// Length is 9, 1 tag and 8 data.
buf << static_cast<uint8_t>(9) << kHIDTag;
HALSIM_GetJoystickOutputs(i, &outputs, &leftRumble, &rightRumble);
auto op = static_cast<uint32_t>(outputs);
auto rr = static_cast<uint16_t>(rightRumble);
auto lr = static_cast<uint16_t>(leftRumble);
buf.write((op >> 24 & 0xFF));
buf.write((op >> 16 & 0xFF));
buf.write((op >> 8 & 0xFF));
buf.write((op & 0xFF));
buf.write((rr >> 8 & 0xFF));
buf.write((rr & 0xFF));
buf.write((lr >> 8 & 0xFF));
buf.write((lr & 0xFF));
}
}
void DSCommPacket::SendUDPToHALSim(void) {
SendJoysticks();
HALSIM_SetDriverStationMatchTime(m_match_time);
HALSIM_SetDriverStationEnabled(m_control_word.enabled);
HALSIM_SetDriverStationAutonomous(m_control_word.autonomous);
HALSIM_SetDriverStationTest(m_control_word.test);
HALSIM_SetDriverStationEStop(m_control_word.eStop);
HALSIM_SetDriverStationFmsAttached(m_control_word.fmsAttached);
HALSIM_SetDriverStationDsAttached(m_control_word.dsAttached);
HALSIM_SetDriverStationAllianceStationId(m_alliance_station);
HALSIM_NotifyDriverStationNewData();
}