Mirror/betaflight
1
0
Fork 0
mirror of https://github.com/betaflight/betaflight.git synced 2025-07-16 12:55:19 +03:00
Code Issues Wiki Activity
betaflight/src/serial.c
luggi 40392d06b8 fixed negative currents messing up the mAh counter 
now there is no virtually limit for the mAh drawn counter.
The outpout is limited by the mwii serial protocol tough (~65Ah)
2014-06-01 15:38:17 +02:00

706 lines
25 KiB
C
Executable file
Raw Blame History

#include "board.h"
#include "mw.h"
#include "cli.h"
#include "telemetry_common.h"
// Multiwii Serial Protocol 0
#define MSP_VERSION 0
#define CAP_PLATFORM_32BIT ((uint32_t)1 << 31)
#define CAP_DYNBALANCE ((uint32_t)1 << 2)
#define CAP_FLAPS ((uint32_t)1 << 3)
#define MSP_IDENT 100 //out message multitype + multiwii version + protocol version + capability variable
#define MSP_STATUS 101 //out message cycletime & errors_count & sensor present & box activation & current setting number
#define MSP_RAW_IMU 102 //out message 9 DOF
#define MSP_SERVO 103 //out message 8 servos
#define MSP_MOTOR 104 //out message 8 motors
#define MSP_RC 105 //out message 8 rc chan and more
#define MSP_RAW_GPS 106 //out message fix, numsat, lat, lon, alt, speed, ground course
#define MSP_COMP_GPS 107 //out message distance home, direction home
#define MSP_ATTITUDE 108 //out message 2 angles 1 heading
#define MSP_ALTITUDE 109 //out message altitude, variometer
#define MSP_ANALOG 110 //out message vbat, powermetersum, rssi if available on RX
#define MSP_RC_TUNING 111 //out message rc rate, rc expo, rollpitch rate, yaw rate, dyn throttle PID
#define MSP_PID 112 //out message P I D coeff (9 are used currently)
#define MSP_BOX 113 //out message BOX setup (number is dependant of your setup)
#define MSP_MISC 114 //out message powermeter trig
#define MSP_MOTOR_PINS 115 //out message which pins are in use for motors & servos, for GUI
#define MSP_BOXNAMES 116 //out message the aux switch names
#define MSP_PIDNAMES 117 //out message the PID names
#define MSP_WP 118 //out message get a WP, WP# is in the payload, returns (WP#, lat, lon, alt, flags) WP#0-home, WP#16-poshold
#define MSP_BOXIDS 119 //out message get the permanent IDs associated to BOXes
#define MSP_SERVO_CONF 120 //out message Servo settings
#define MSP_NAV_STATUS 121 //out message Returns navigation status
#define MSP_NAV_CONFIG 122 //out message Returns navigation parameters
#define MSP_SET_RAW_RC 200 //in message 8 rc chan
#define MSP_SET_RAW_GPS 201 //in message fix, numsat, lat, lon, alt, speed
#define MSP_SET_PID 202 //in message P I D coeff (9 are used currently)
#define MSP_SET_BOX 203 //in message BOX setup (number is dependant of your setup)
#define MSP_SET_RC_TUNING 204 //in message rc rate, rc expo, rollpitch rate, yaw rate, dyn throttle PID
#define MSP_ACC_CALIBRATION 205 //in message no param
#define MSP_MAG_CALIBRATION 206 //in message no param
#define MSP_SET_MISC 207 //in message powermeter trig + 8 free for future use
#define MSP_RESET_CONF 208 //in message no param
#define MSP_SET_WP 209 //in message sets a given WP (WP#,lat, lon, alt, flags)
#define MSP_SELECT_SETTING 210 //in message Select Setting Number (0-2)
#define MSP_SET_HEAD 211 //in message define a new heading hold direction
#define MSP_SET_SERVO_CONF 212 //in message Servo settings
#define MSP_SET_MOTOR 214 //in message PropBalance function
#define MSP_SET_NAV_CONFIG 215 //in message Sets nav config parameters - write to the eeprom
// #define MSP_BIND 240 //in message no param
#define MSP_EEPROM_WRITE 250 //in message no param
#define MSP_DEBUGMSG 253 //out message debug string buffer
#define MSP_DEBUG 254 //out message debug1,debug2,debug3,debug4
// Additional commands that are not compatible with MultiWii
#define MSP_UID 160 //out message Unique device ID
#define MSP_ACC_TRIM 240 //out message get acc angle trim values
#define MSP_SET_ACC_TRIM 239 //in message set acc angle trim values
#define MSP_GPSSVINFO 164 //out message get Signal Strength (only U-Blox)
#define INBUF_SIZE 64
struct box_t {
const uint8_t boxIndex; // this is from boxnames enum
const char *boxName; // GUI-readable box name
const uint8_t permanentId; //
} boxes[] = {
{ BOXARM, "ARM;", 0 },
{ BOXANGLE, "ANGLE;", 1 },
{ BOXHORIZON, "HORIZON;", 2 },
{ BOXBARO, "BARO;", 3 },
{ BOXVARIO, "VARIO;", 4 },
{ BOXMAG, "MAG;", 5 },
{ BOXHEADFREE, "HEADFREE;", 6 },
{ BOXHEADADJ, "HEADADJ;", 7 },
{ BOXCAMSTAB, "CAMSTAB;", 8 },
{ BOXCAMTRIG, "CAMTRIG;", 9 },
{ BOXGPSHOME, "GPS HOME;", 10 },
{ BOXGPSHOLD, "GPS HOLD;", 11 },
{ BOXPASSTHRU, "PASSTHRU;", 12 },
{ BOXBEEPERON, "BEEPER;", 13 },
{ BOXLEDMAX, "LEDMAX;", 14 },
{ BOXLEDLOW, "LEDLOW;", 15 },
{ BOXLLIGHTS, "LLIGHTS;", 16 },
{ BOXCALIB, "CALIB;", 17 },
{ BOXGOV, "GOVERNOR;", 18 },
{ BOXOSD, "OSD SW;", 19 },
{ BOXTELEMETRY, "TELEMETRY;", 20 },
{ CHECKBOXITEMS, NULL, 0xFF }
};
// this is calculated at startup based on enabled features.
static uint8_t availableBoxes[CHECKBOXITEMS];
// this is the number of filled indexes in above array
static uint8_t numberBoxItems = 0;
// from mixer.c
extern int16_t motor_disarmed[MAX_MOTORS];
static const char pidnames[] =
"ROLL;"
"PITCH;"
"YAW;"
"ALT;"
"Pos;"
"PosR;"
"NavR;"
"LEVEL;"
"MAG;"
"VEL;";
static uint8_t checksum, indRX, inBuf[INBUF_SIZE];
static uint8_t cmdMSP;
void serialize32(uint32_t a)
{
static uint8_t t;
t = a;
serialWrite(core.mainport, t);
checksum ^= t;
t = a >> 8;
serialWrite(core.mainport, t);
checksum ^= t;
t = a >> 16;
serialWrite(core.mainport, t);
checksum ^= t;
t = a >> 24;
serialWrite(core.mainport, t);
checksum ^= t;
}
void serialize16(int16_t a)
{
static uint8_t t;
t = a;
serialWrite(core.mainport, t);
checksum ^= t;
t = a >> 8 & 0xff;
serialWrite(core.mainport, t);
checksum ^= t;
}
void serialize8(uint8_t a)
{
serialWrite(core.mainport, a);
checksum ^= a;
}
uint8_t read8(void)
{
return inBuf[indRX++] & 0xff;
}
uint16_t read16(void)
{
uint16_t t = read8();
t += (uint16_t)read8() << 8;
return t;
}
uint32_t read32(void)
{
uint32_t t = read16();
t += (uint32_t)read16() << 16;
return t;
}
void headSerialResponse(uint8_t err, uint8_t s)
{
serialize8('$');
serialize8('M');
serialize8(err ? '!' : '>');
checksum = 0; // start calculating a new checksum
serialize8(s);
serialize8(cmdMSP);
}
void headSerialReply(uint8_t s)
{
headSerialResponse(0, s);
}
void headSerialError(uint8_t s)
{
headSerialResponse(1, s);
}
void tailSerialReply(void)
{
serialize8(checksum);
}
void s_struct(uint8_t *cb, uint8_t siz)
{
headSerialReply(siz);
while (siz--)
serialize8(*cb++);
}
void serializeNames(const char *s)
{
const char *c;
for (c = s; *c; c++)
serialize8(*c);
}
void serializeBoxNamesReply(void)
{
int i, idx, j, flag = 1, count = 0, len;
reset:
// in first run of the loop, we grab total size of junk to be sent
// then come back and actually send it
for (i = 0; i < numberBoxItems; i++) {
idx = availableBoxes[i];
len = strlen(boxes[idx].boxName);
if (flag) {
count += len;
} else {
for (j = 0; j < len; j++)
serialize8(boxes[idx].boxName[j]);
}
}
if (flag) {
headSerialReply(count);
flag = 0;
goto reset;
}
}
void serialInit(uint32_t baudrate)
{
int idx;
core.mainport = uartOpen(USART1, NULL, baudrate, MODE_RXTX);
// calculate used boxes based on features and fill availableBoxes[] array
memset(availableBoxes, 0xFF, sizeof(availableBoxes));
idx = 0;
availableBoxes[idx++] = BOXARM;
if (sensors(SENSOR_ACC)) {
availableBoxes[idx++] = BOXANGLE;
availableBoxes[idx++] = BOXHORIZON;
}
if (sensors(SENSOR_BARO)) {
availableBoxes[idx++] = BOXBARO;
if (feature(FEATURE_VARIO))
availableBoxes[idx++] = BOXVARIO;
}
if (sensors(SENSOR_ACC) || sensors(SENSOR_MAG)) {
availableBoxes[idx++] = BOXMAG;
availableBoxes[idx++] = BOXHEADFREE;
availableBoxes[idx++] = BOXHEADADJ;
}
if (feature(FEATURE_SERVO_TILT))
availableBoxes[idx++] = BOXCAMSTAB;
if (feature(FEATURE_GPS)) {
availableBoxes[idx++] = BOXGPSHOME;
availableBoxes[idx++] = BOXGPSHOLD;
}
if (mcfg.mixerConfiguration == MULTITYPE_FLYING_WING || mcfg.mixerConfiguration == MULTITYPE_AIRPLANE)
availableBoxes[idx++] = BOXPASSTHRU;
availableBoxes[idx++] = BOXBEEPERON;
if (feature(FEATURE_INFLIGHT_ACC_CAL))
availableBoxes[idx++] = BOXCALIB;
availableBoxes[idx++] = BOXOSD;
if (feature(FEATURE_TELEMETRY && mcfg.telemetry_switch))
availableBoxes[idx++] = BOXTELEMETRY;
numberBoxItems = idx;
}
static void evaluateCommand(void)
{
uint32_t i, tmp, junk;
uint8_t wp_no;
int32_t lat = 0, lon = 0, alt = 0;
switch (cmdMSP) {
case MSP_SET_RAW_RC:
for (i = 0; i < 8; i++)
rcData[i] = read16();
headSerialReply(0);
mspFrameRecieve();
break;
case MSP_SET_ACC_TRIM:
cfg.angleTrim[PITCH] = read16();
cfg.angleTrim[ROLL] = read16();
headSerialReply(0);
break;
case MSP_SET_RAW_GPS:
f.GPS_FIX = read8();
GPS_numSat = read8();
GPS_coord[LAT] = read32();
GPS_coord[LON] = read32();
GPS_altitude = read16();
GPS_speed = read16();
GPS_update |= 2; // New data signalisation to GPS functions
headSerialReply(0);
break;
case MSP_SET_PID:
for (i = 0; i < PIDITEMS; i++) {
cfg.P8[i] = read8();
cfg.I8[i] = read8();
cfg.D8[i] = read8();
}
headSerialReply(0);
break;
case MSP_SET_BOX:
for (i = 0; i < numberBoxItems; i++)
cfg.activate[availableBoxes[i]] = read16();
headSerialReply(0);
break;
case MSP_SET_RC_TUNING:
cfg.rcRate8 = read8();
cfg.rcExpo8 = read8();
cfg.rollPitchRate = read8();
cfg.yawRate = read8();
cfg.dynThrPID = read8();
cfg.thrMid8 = read8();
cfg.thrExpo8 = read8();
headSerialReply(0);
break;
case MSP_SET_MISC:
read16(); // powerfailmeter
mcfg.minthrottle = read16();
mcfg.maxthrottle = read16();
mcfg.mincommand = read16();
cfg.failsafe_throttle = read16();
read16();
read32();
cfg.mag_declination = read16() * 10;
mcfg.vbatscale = read8(); // actual vbatscale as intended
mcfg.vbatmincellvoltage = read8(); // vbatlevel_warn1 in MWC2.3 GUI
mcfg.vbatmaxcellvoltage = read8(); // vbatlevel_warn2 in MWC2.3 GUI
read8(); // vbatlevel_crit (unused)
headSerialReply(0);
break;
case MSP_SET_MOTOR:
for (i = 0; i < 8; i++)
motor_disarmed[i] = read16();
headSerialReply(0);
break;
case MSP_SELECT_SETTING:
if (!f.ARMED) {
mcfg.current_profile = read8();
if (mcfg.current_profile > 2)
mcfg.current_profile = 0;
// this writes new profile index and re-reads it
writeEEPROM(0, false);
}
headSerialReply(0);
break;
case MSP_SET_HEAD:
magHold = read16();
headSerialReply(0);
break;
case MSP_IDENT:
headSerialReply(7);
serialize8(VERSION); // multiwii version
serialize8(mcfg.mixerConfiguration); // type of multicopter
serialize8(MSP_VERSION); // MultiWii Serial Protocol Version
serialize32(CAP_PLATFORM_32BIT | CAP_DYNBALANCE | (mcfg.flaps_speed ? CAP_FLAPS : 0)); // "capability"
break;
case MSP_STATUS:
headSerialReply(11);
serialize16(cycleTime);
serialize16(i2cGetErrorCounter());
serialize16(sensors(SENSOR_ACC) | sensors(SENSOR_BARO) << 1 | sensors(SENSOR_MAG) << 2 | sensors(SENSOR_GPS) << 3 | sensors(SENSOR_SONAR) << 4);
// OK, so you waste all the fucking time to have BOXNAMES and BOXINDEXES etc, and then you go ahead and serialize enabled shit simply by stuffing all
// the bits in order, instead of setting the enabled bits based on BOXINDEX. WHERE IS THE FUCKING LOGIC IN THIS, FUCKWADS.
// Serialize the boxes in the order we delivered them, until multiwii retards fix their shit
junk = 0;
tmp = f.ANGLE_MODE << BOXANGLE | f.HORIZON_MODE << BOXHORIZON |
f.BARO_MODE << BOXBARO | f.MAG_MODE << BOXMAG | f.HEADFREE_MODE << BOXHEADFREE | rcOptions[BOXHEADADJ] << BOXHEADADJ |
rcOptions[BOXCAMSTAB] << BOXCAMSTAB | rcOptions[BOXCAMTRIG] << BOXCAMTRIG |
f.GPS_HOME_MODE << BOXGPSHOME | f.GPS_HOLD_MODE << BOXGPSHOLD |
f.PASSTHRU_MODE << BOXPASSTHRU |
rcOptions[BOXBEEPERON] << BOXBEEPERON |
rcOptions[BOXLEDMAX] << BOXLEDMAX |
rcOptions[BOXLLIGHTS] << BOXLLIGHTS |
rcOptions[BOXVARIO] << BOXVARIO |
rcOptions[BOXCALIB] << BOXCALIB |
rcOptions[BOXGOV] << BOXGOV |
rcOptions[BOXOSD] << BOXOSD |
rcOptions[BOXTELEMETRY] << BOXTELEMETRY |
f.ARMED << BOXARM;
for (i = 0; i < numberBoxItems; i++) {
int flag = (tmp & (1 << availableBoxes[i]));
if (flag)
junk |= 1 << i;
}
serialize32(junk);
serialize8(mcfg.current_profile);
break;
case MSP_RAW_IMU:
headSerialReply(18);
// Retarded hack until multiwiidorks start using real units for sensor data
if (acc_1G > 1024) {
for (i = 0; i < 3; i++)
serialize16(accSmooth[i] / 8);
} else {
for (i = 0; i < 3; i++)
serialize16(accSmooth[i]);
}
for (i = 0; i < 3; i++)
serialize16(gyroData[i]);
for (i = 0; i < 3; i++)
serialize16(magADC[i]);
break;
case MSP_SERVO:
s_struct((uint8_t *)&servo, 16);
break;
case MSP_SERVO_CONF:
headSerialReply(56);
for (i = 0; i < MAX_SERVOS; i++) {
serialize16(cfg.servoConf[i].min);
serialize16(cfg.servoConf[i].max);
serialize16(cfg.servoConf[i].middle);
serialize8(cfg.servoConf[i].rate);
}
break;
case MSP_SET_SERVO_CONF:
headSerialReply(0);
for (i = 0; i < MAX_SERVOS; i++) {
cfg.servoConf[i].min = read16();
cfg.servoConf[i].max = read16();
cfg.servoConf[i].middle = read16();
cfg.servoConf[i].rate = read8();
}
break;
case MSP_MOTOR:
s_struct((uint8_t *)motor, 16);
break;
case MSP_RC:
headSerialReply(16);
for (i = 0; i < 8; i++)
serialize16(rcData[i]);
break;
case MSP_RAW_GPS:
headSerialReply(16);
serialize8(f.GPS_FIX);
serialize8(GPS_numSat);
serialize32(GPS_coord[LAT]);
serialize32(GPS_coord[LON]);
serialize16(GPS_altitude);
serialize16(GPS_speed);
serialize16(GPS_ground_course);
break;
case MSP_COMP_GPS:
headSerialReply(5);
serialize16(GPS_distanceToHome);
serialize16(GPS_directionToHome);
serialize8(GPS_update & 1);
break;
case MSP_ATTITUDE:
headSerialReply(6);
for (i = 0; i < 2; i++)
serialize16(angle[i]);
serialize16(heading);
break;
case MSP_ALTITUDE:
headSerialReply(6);
serialize32(EstAlt);
serialize16(vario);
break;
case MSP_ANALOG:
headSerialReply(7);
serialize8((uint8_t)constrain(vbat, 0, 255));
serialize16((uint16_t)constrain(mAhdrawn, 0, 0xFFFF)); // milliamphours drawn from battery
serialize16(rssi);
if (mcfg.multiwiicurrentoutput)
serialize16((uint16_t)constrain((abs(amperage) * 10), 0, 0xFFFF)); // send amperage in 0.001 A steps
else
serialize16((uint16_t)constrain(abs(amperage), 0, 0xFFFF)); // send amperage in 0.01 A steps
break;
case MSP_RC_TUNING:
headSerialReply(7);
serialize8(cfg.rcRate8);
serialize8(cfg.rcExpo8);
serialize8(cfg.rollPitchRate);
serialize8(cfg.yawRate);
serialize8(cfg.dynThrPID);
serialize8(cfg.thrMid8);
serialize8(cfg.thrExpo8);
break;
case MSP_PID:
headSerialReply(3 * PIDITEMS);
for (i = 0; i < PIDITEMS; i++) {
serialize8(cfg.P8[i]);
serialize8(cfg.I8[i]);
serialize8(cfg.D8[i]);
}
break;
case MSP_PIDNAMES:
headSerialReply(sizeof(pidnames) - 1);
serializeNames(pidnames);
break;
case MSP_BOX:
headSerialReply(2 * numberBoxItems);
for (i = 0; i < numberBoxItems; i++)
serialize16(cfg.activate[availableBoxes[i]]);
break;
case MSP_BOXNAMES:
// headSerialReply(sizeof(boxnames) - 1);
serializeBoxNamesReply();
break;
case MSP_BOXIDS:
headSerialReply(numberBoxItems);
for (i = 0; i < numberBoxItems; i++)
serialize8(availableBoxes[i]);
break;
case MSP_MISC:
headSerialReply(2 * 6 + 4 + 2 + 4);
serialize16(0); // intPowerTrigger1 (aka useless trash)
serialize16(mcfg.minthrottle);
serialize16(mcfg.maxthrottle);
serialize16(mcfg.mincommand);
serialize16(cfg.failsafe_throttle);
serialize16(0); // plog useless shit
serialize32(0); // plog useless shit
serialize16(cfg.mag_declination / 10); // TODO check this shit
serialize8(mcfg.vbatscale);
serialize8(mcfg.vbatmincellvoltage);
serialize8(mcfg.vbatmaxcellvoltage);
serialize8(0);
break;
case MSP_MOTOR_PINS:
headSerialReply(8);
for (i = 0; i < 8; i++)
serialize8(i + 1);
break;
case MSP_WP:
wp_no = read8(); // get the wp number
headSerialReply(18);
if (wp_no == 0) {
lat = GPS_home[LAT];
lon = GPS_home[LON];
} else if (wp_no == 16) {
lat = GPS_hold[LAT];
lon = GPS_hold[LON];
}
serialize8(wp_no);
serialize32(lat);
serialize32(lon);
serialize32(AltHold); // altitude (cm) will come here -- temporary implementation to test feature with apps
serialize16(0); // heading will come here (deg)
serialize16(0); // time to stay (ms) will come here
serialize8(0); // nav flag will come here
break;
case MSP_SET_WP:
wp_no = read8(); //get the wp number
lat = read32();
lon = read32();
alt = read32(); // to set altitude (cm)
read16(); // future: to set heading (deg)
read16(); // future: to set time to stay (ms)
read8(); // future: to set nav flag
if (wp_no == 0) {
GPS_home[LAT] = lat;
GPS_home[LON] = lon;
f.GPS_HOME_MODE = 0; // with this flag, GPS_set_next_wp will be called in the next loop -- OK with SERIAL GPS / OK with I2C GPS
f.GPS_FIX_HOME = 1;
if (alt != 0)
AltHold = alt; // temporary implementation to test feature with apps
} else if (wp_no == 16) { // OK with SERIAL GPS -- NOK for I2C GPS / needs more code dev in order to inject GPS coord inside I2C GPS
GPS_hold[LAT] = lat;
GPS_hold[LON] = lon;
if (alt != 0)
AltHold = alt; // temporary implementation to test feature with apps
nav_mode = NAV_MODE_WP;
GPS_set_next_wp(&GPS_hold[LAT], &GPS_hold[LON]);
}
headSerialReply(0);
break;
case MSP_RESET_CONF:
if (!f.ARMED)
checkFirstTime(true);
headSerialReply(0);
break;
case MSP_ACC_CALIBRATION:
if (!f.ARMED)
calibratingA = CALIBRATING_ACC_CYCLES;
headSerialReply(0);
break;
case MSP_MAG_CALIBRATION:
if (!f.ARMED)
f.CALIBRATE_MAG = 1;
headSerialReply(0);
break;
case MSP_EEPROM_WRITE:
if (f.ARMED) {
headSerialError(0);
} else {
writeEEPROM(0, true);
headSerialReply(0);
}
break;
case MSP_DEBUG:
headSerialReply(8);
// make use of this crap, output some useful QA statistics
debug[3] = ((hse_value / 1000000) * 1000) + (SystemCoreClock / 1000000); // XX0YY [crystal clock : core clock]
for (i = 0; i < 4; i++)
serialize16(debug[i]); // 4 variables are here for general monitoring purpose
break;
// Additional commands that are not compatible with MultiWii
case MSP_ACC_TRIM:
headSerialReply(4);
serialize16(cfg.angleTrim[PITCH]);
serialize16(cfg.angleTrim[ROLL]);
break;
case MSP_UID:
headSerialReply(12);
serialize32(U_ID_0);
serialize32(U_ID_1);
serialize32(U_ID_2);
break;
case MSP_GPSSVINFO:
headSerialReply(1 + (GPS_numCh * 4));
serialize8(GPS_numCh);
for (i = 0; i < GPS_numCh; i++){
serialize8(GPS_svinfo_chn[i]);
serialize8(GPS_svinfo_svid[i]);
serialize8(GPS_svinfo_quality[i]);
serialize8(GPS_svinfo_cno[i]);
}
break;
default: // we do not know how to handle the (valid) message, indicate error MSP $M!
headSerialError(0);
break;
}
tailSerialReply();
}
// evaluate all other incoming serial data
static void evaluateOtherData(uint8_t sr)
{
if (sr == '#')
cliProcess();
else if (sr == mcfg.reboot_character)
systemReset(true); // reboot to bootloader
}
void serialCom(void)
{
uint8_t c;
static uint8_t offset;
static uint8_t dataSize;
static enum _serial_state {
IDLE,
HEADER_START,
HEADER_M,
HEADER_ARROW,
HEADER_SIZE,
HEADER_CMD,
} c_state = IDLE;
// in cli mode, all serial stuff goes to here. enter cli mode by sending #
if (cliMode) {
cliProcess();
return;
}
while (serialTotalBytesWaiting(core.mainport)) {
c = serialRead(core.mainport);
if (c_state == IDLE) {
c_state = (c == '$') ? HEADER_START : IDLE;
if (c_state == IDLE && !f.ARMED)
evaluateOtherData(c); // if not armed evaluate all other incoming serial data
} else if (c_state == HEADER_START) {
c_state = (c == 'M') ? HEADER_M : IDLE;
} else if (c_state == HEADER_M) {
c_state = (c == '<') ? HEADER_ARROW : IDLE;
} else if (c_state == HEADER_ARROW) {
if (c > INBUF_SIZE) { // now we are expecting the payload size
c_state = IDLE;
continue;
}
dataSize = c;
offset = 0;
checksum = 0;
indRX = 0;
checksum ^= c;
c_state = HEADER_SIZE; // the command is to follow
} else if (c_state == HEADER_SIZE) {
cmdMSP = c;
checksum ^= c;
c_state = HEADER_CMD;
} else if (c_state == HEADER_CMD && offset < dataSize) {
checksum ^= c;
inBuf[offset++] = c;
} else if (c_state == HEADER_CMD && offset >= dataSize) {
if (checksum == c) { // compare calculated and transferred checksum
evaluateCommand(); // we got a valid packet, evaluate it
}
c_state = IDLE;
}
}
}
Reference in a new issue View git blame Copy permalink