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Refactor blackbox IO routines out into separate file

This commit is contained in:
Nicholas Sherlock 2015-01-28 20:42:51 +13:00
parent b8b248827c
commit 0624eb5067
4 changed files with 612 additions and 452 deletions
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4
Makefile
View File

@ -248,7 +248,8 @@ HIGHEND_SRC = flight/autotune.c \
telemetry/smartport.c \ telemetry/smartport.c \
sensors/sonar.c \ sensors/sonar.c \
sensors/barometer.c \ sensors/barometer.c \
blackbox/blackbox.c blackbox/blackbox.c \
blackbox/blackbox_io.c
VCP_SRC = \ VCP_SRC = \
vcp/hw_config.c \ vcp/hw_config.c \
@ -395,6 +396,7 @@ CJMCU_SRC = \
drivers/timer.c \ drivers/timer.c \
drivers/timer_stm32f10x.c \ drivers/timer_stm32f10x.c \
blackbox/blackbox.c \ blackbox/blackbox.c \
blackbox/blackbox_io.c \
hardware_revision.c \ hardware_revision.c \
$(COMMON_SRC) $(COMMON_SRC)

582
src/main/blackbox/blackbox.c
View File

@ -17,7 +17,6 @@
#include <stdbool.h> #include <stdbool.h>
#include <string.h> #include <string.h>
#include <stdarg.h>
#include "platform.h" #include "platform.h"
#include "version.h" #include "version.h"
@ -37,8 +36,6 @@
#include "drivers/light_led.h" #include "drivers/light_led.h"
#include "drivers/sound_beeper.h" #include "drivers/sound_beeper.h"
#include "common/printf.h"
#include "flight/flight.h" #include "flight/flight.h"
#include "sensors/sensors.h" #include "sensors/sensors.h"
#include "sensors/boardalignment.h" #include "sensors/boardalignment.h"
@ -75,9 +72,8 @@
#include "config/config_master.h" #include "config/config_master.h"
#include "blackbox.h" #include "blackbox.h"
#include "blackbox_io.h"
#define BLACKBOX_BAUDRATE 115200
#define BLACKBOX_INITIAL_PORT_MODE MODE_TX
#define BLACKBOX_I_INTERVAL 32 #define BLACKBOX_I_INTERVAL 32
#define ARRAY_LENGTH(x) (sizeof((x))/sizeof((x)[0])) #define ARRAY_LENGTH(x) (sizeof((x))/sizeof((x)[0]))
@ -255,9 +251,6 @@ extern uint8_t motorCount;
//From mw.c: //From mw.c:
extern uint32_t currentTime; extern uint32_t currentTime;
// How many bytes should we transmit per loop iteration?
static uint8_t serialChunkSize = 16;
static BlackboxState blackboxState = BLACKBOX_STATE_DISABLED; static BlackboxState blackboxState = BLACKBOX_STATE_DISABLED;
static struct { static struct {
@ -281,10 +274,6 @@ STATIC_ASSERT((sizeof(blackboxConditionCache) * 8) >= FLIGHT_LOG_FIELD_CONDITION
static uint32_t blackboxIteration; static uint32_t blackboxIteration;
static uint32_t blackboxPFrameIndex, blackboxIFrameIndex; static uint32_t blackboxPFrameIndex, blackboxIFrameIndex;
static serialPort_t *blackboxPort;
static portMode_t previousPortMode;
static uint32_t previousBaudRate;
/* /*
* We store voltages in I-frames relative to this, which was the voltage when the blackbox was activated. * We store voltages in I-frames relative to this, which was the voltage when the blackbox was activated.
* This helps out since the voltage is only expected to fall from that point and we can reduce our diffs * This helps out since the voltage is only expected to fall from that point and we can reduce our diffs
@ -299,306 +288,6 @@ static blackboxValues_t blackboxHistoryRing[3];
// These point into blackboxHistoryRing, use them to know where to store history of a given age (0, 1 or 2 generations old) // These point into blackboxHistoryRing, use them to know where to store history of a given age (0, 1 or 2 generations old)
static blackboxValues_t* blackboxHistory[3]; static blackboxValues_t* blackboxHistory[3];
static void blackboxWrite(uint8_t value)
{
serialWrite(blackboxPort, value);
}
static void _putc(void *p, char c)
{
(void)p;
serialWrite(blackboxPort, c);
}
//printf() to the blackbox serial port with no blocking shenanigans (so it's caller's responsibility to not write too fast!)
static void blackboxPrintf(char *fmt, ...)
{
va_list va;
va_start(va, fmt);
tfp_format(NULL, _putc, fmt, va);
va_end(va);
}
// Print the null-terminated string 's' to the serial port and return the number of bytes written
static int blackboxPrint(const char *s)
{
const char *pos = s;
while (*pos) {
serialWrite(blackboxPort, *pos);
pos++;
}
return pos - s;
}
/**
* Write an unsigned integer to the blackbox serial port using variable byte encoding.
*/
static void writeUnsignedVB(uint32_t value)
{
//While this isn't the final byte (we can only write 7 bits at a time)
while (value > 127) {
blackboxWrite((uint8_t) (value | 0x80)); // Set the high bit to mean "more bytes follow"
value >>= 7;
}
blackboxWrite(value);
}
/**
* Write a signed integer to the blackbox serial port using ZigZig and variable byte encoding.
*/
static void writeSignedVB(int32_t value)
{
//ZigZag encode to make the value always positive
writeUnsignedVB((uint32_t)((value << 1) ^ (value >> 31)));
}
static void writeS16(int16_t value)
{
blackboxWrite(value & 0xFF);
blackboxWrite((value >> 8) & 0xFF);
}
/**
* Write a 2 bit tag followed by 3 signed fields of 2, 4, 6 or 32 bits
*/
static void writeTag2_3S32(int32_t *values) {
static const int NUM_FIELDS = 3;
//Need to be enums rather than const ints if we want to switch on them (due to being C)
enum {
BITS_2 = 0,
BITS_4 = 1,
BITS_6 = 2,
BITS_32 = 3
};
enum {
BYTES_1 = 0,
BYTES_2 = 1,
BYTES_3 = 2,
BYTES_4 = 3
};
int x;
int selector = BITS_2, selector2;
/*
* Find out how many bits the largest value requires to encode, and use it to choose one of the packing schemes
* below:
*
* Selector possibilities
*
* 2 bits per field ss11 2233,
* 4 bits per field ss00 1111 2222 3333
* 6 bits per field ss11 1111 0022 2222 0033 3333
* 32 bits per field sstt tttt followed by fields of various byte counts
*/
for (x = 0; x < NUM_FIELDS; x++) {
//Require more than 6 bits?
if (values[x] >= 32 || values[x] < -32) {
selector = BITS_32;
break;
}
//Require more than 4 bits?
if (values[x] >= 8 || values[x] < -8) {
if (selector < BITS_6)
selector = BITS_6;
} else if (values[x] >= 2 || values[x] < -2) { //Require more than 2 bits?
if (selector < BITS_4)
selector = BITS_4;
}
}
switch (selector) {
case BITS_2:
blackboxWrite((selector << 6) | ((values[0] & 0x03) << 4) | ((values[1] & 0x03) << 2) | (values[2] & 0x03));
break;
case BITS_4:
blackboxWrite((selector << 6) | (values[0] & 0x0F));
blackboxWrite((values[1] << 4) | (values[2] & 0x0F));
break;
case BITS_6:
blackboxWrite((selector << 6) | (values[0] & 0x3F));
blackboxWrite((uint8_t)values[1]);
blackboxWrite((uint8_t)values[2]);
break;
case BITS_32:
/*
* Do another round to compute a selector for each field, assuming that they are at least 8 bits each
*
* Selector2 field possibilities
* 0 - 8 bits
* 1 - 16 bits
* 2 - 24 bits
* 3 - 32 bits
*/
selector2 = 0;
//Encode in reverse order so the first field is in the low bits:
for (x = NUM_FIELDS - 1; x >= 0; x--) {
selector2 <<= 2;
if (values[x] < 128 && values[x] >= -128)
selector2 |= BYTES_1;
else if (values[x] < 32768 && values[x] >= -32768)
selector2 |= BYTES_2;
else if (values[x] < 8388608 && values[x] >= -8388608)
selector2 |= BYTES_3;
else
selector2 |= BYTES_4;
}
//Write the selectors
blackboxWrite((selector << 6) | selector2);
//And now the values according to the selectors we picked for them
for (x = 0; x < NUM_FIELDS; x++, selector2 >>= 2) {
switch (selector2 & 0x03) {
case BYTES_1:
blackboxWrite(values[x]);
break;
case BYTES_2:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
break;
case BYTES_3:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x] >> 16);
break;
case BYTES_4:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x] >> 16);
blackboxWrite(values[x] >> 24);
break;
}
}
break;
}
}
/**
* Write an 8-bit selector followed by four signed fields of size 0, 4, 8 or 16 bits.
*/
static void writeTag8_4S16(int32_t *values) {
//Need to be enums rather than const ints if we want to switch on them (due to being C)
enum {
FIELD_ZERO = 0,
FIELD_4BIT = 1,
FIELD_8BIT = 2,
FIELD_16BIT = 3
};
uint8_t selector, buffer;
int nibbleIndex;
int x;
selector = 0;
//Encode in reverse order so the first field is in the low bits:
for (x = 3; x >= 0; x--) {
selector <<= 2;
if (values[x] == 0)
selector |= FIELD_ZERO;
else if (values[x] < 8 && values[x] >= -8)
selector |= FIELD_4BIT;
else if (values[x] < 128 && values[x] >= -128)
selector |= FIELD_8BIT;
else
selector |= FIELD_16BIT;
}
blackboxWrite(selector);
nibbleIndex = 0;
buffer = 0;
for (x = 0; x < 4; x++, selector >>= 2) {
switch (selector & 0x03) {
case FIELD_ZERO:
//No-op
break;
case FIELD_4BIT:
if (nibbleIndex == 0) {
//We fill high-bits first
buffer = values[x] << 4;
nibbleIndex = 1;
} else {
blackboxWrite(buffer | (values[x] & 0x0F));
nibbleIndex = 0;
}
break;
case FIELD_8BIT:
if (nibbleIndex == 0)
blackboxWrite(values[x]);
else {
//Write the high bits of the value first (mask to avoid sign extension)
blackboxWrite(buffer | ((values[x] >> 4) & 0x0F));
//Now put the leftover low bits into the top of the next buffer entry
buffer = values[x] << 4;
}
break;
case FIELD_16BIT:
if (nibbleIndex == 0) {
//Write high byte first
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x]);
} else {
//First write the highest 4 bits
blackboxWrite(buffer | ((values[x] >> 12) & 0x0F));
// Then the middle 8
blackboxWrite(values[x] >> 4);
//Only the smallest 4 bits are still left to write
buffer = values[x] << 4;
}
break;
}
}
//Anything left over to write?
if (nibbleIndex == 1)
blackboxWrite(buffer);
}
/**
* Write `valueCount` fields from `values` to the Blackbox using signed variable byte encoding. A 1-byte header is
* written first which specifies which fields are non-zero (so this encoding is compact when most fields are zero).
*
* valueCount must be 8 or less.
*/
static void writeTag8_8SVB(int32_t *values, int valueCount)
{
uint8_t header;
int i;
if (valueCount > 0) {
//If we're only writing one field then we can skip the header
if (valueCount == 1) {
writeSignedVB(values[0]);
} else {
//First write a one-byte header that marks which fields are non-zero
header = 0;
// First field should be in low bits of header
for (i = valueCount - 1; i >= 0; i--) {
header <<= 1;
if (values[i] != 0)
header |= 0x01;
}
blackboxWrite(header);
for (i = 0; i < valueCount; i++)
if (values[i] != 0)
writeSignedVB(values[i]);
}
}
}
static bool testBlackboxConditionUncached(FlightLogFieldCondition condition) static bool testBlackboxConditionUncached(FlightLogFieldCondition condition)
{ {
switch (condition) { switch (condition) {
@ -660,9 +349,10 @@ static void blackboxBuildConditionCache()
blackboxConditionCache = 0; blackboxConditionCache = 0;
for (cond = FLIGHT_LOG_FIELD_CONDITION_FIRST; cond <= FLIGHT_LOG_FIELD_CONDITION_LAST; cond++) { for (cond = FLIGHT_LOG_FIELD_CONDITION_FIRST; cond <= FLIGHT_LOG_FIELD_CONDITION_LAST; cond++) {
if (testBlackboxConditionUncached(cond)) if (testBlackboxConditionUncached(cond)) {
blackboxConditionCache |= 1 << cond; blackboxConditionCache |= 1 << cond;
} }
}
} }
static bool testBlackboxCondition(FlightLogFieldCondition condition) static bool testBlackboxCondition(FlightLogFieldCondition condition)
@ -694,6 +384,7 @@ static void blackboxSetState(BlackboxState newState)
break; break;
case BLACKBOX_STATE_SHUTTING_DOWN: case BLACKBOX_STATE_SHUTTING_DOWN:
xmitState.u.startTime = millis(); xmitState.u.startTime = millis();
blackboxDeviceFlush();
break; break;
default: default:
; ;
@ -708,23 +399,28 @@ static void writeIntraframe(void)
blackboxWrite('I'); blackboxWrite('I');
writeUnsignedVB(blackboxIteration); blackboxWriteUnsignedVB(blackboxIteration);
writeUnsignedVB(blackboxCurrent->time); blackboxWriteUnsignedVB(blackboxCurrent->time);
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->axisPID_P[x]); blackboxWriteSignedVB(blackboxCurrent->axisPID_P[x]);
}
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->axisPID_I[x]); blackboxWriteSignedVB(blackboxCurrent->axisPID_I[x]);
}
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NONZERO_PID_D_0 + x)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NONZERO_PID_D_0 + x)) {
writeSignedVB(blackboxCurrent->axisPID_D[x]); blackboxWriteSignedVB(blackboxCurrent->axisPID_D[x]);
}
}
for (x = 0; x < 3; x++) for (x = 0; x < 3; x++) {
writeSignedVB(blackboxCurrent->rcCommand[x]); blackboxWriteSignedVB(blackboxCurrent->rcCommand[x]);
}
writeUnsignedVB(blackboxCurrent->rcCommand[3] - masterConfig.escAndServoConfig.minthrottle); //Throttle lies in range [minthrottle..maxthrottle] blackboxWriteUnsignedVB(blackboxCurrent->rcCommand[3] - masterConfig.escAndServoConfig.minthrottle); //Throttle lies in range [minthrottle..maxthrottle]
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_VBAT)) { if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_VBAT)) {
/* /*
@ -733,41 +429,47 @@ static void writeIntraframe(void)
* *
* Write 14 bits even if the number is negative (which would otherwise result in 32 bits) * Write 14 bits even if the number is negative (which would otherwise result in 32 bits)
*/ */
writeUnsignedVB((vbatReference - blackboxCurrent->vbatLatest) & 0x3FFF); blackboxWriteUnsignedVB((vbatReference - blackboxCurrent->vbatLatest) & 0x3FFF);
} }
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_AMPERAGE)) { if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_AMPERAGE)) {
// 12bit value directly from ADC // 12bit value directly from ADC
writeUnsignedVB(blackboxCurrent->amperageLatest); blackboxWriteUnsignedVB(blackboxCurrent->amperageLatest);
} }
#ifdef MAG #ifdef MAG
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_MAG)) { if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_MAG)) {
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->magADC[x]); blackboxWriteSignedVB(blackboxCurrent->magADC[x]);
}
} }
#endif #endif
#ifdef BARO #ifdef BARO
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_BARO)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_BARO)) {
writeSignedVB(blackboxCurrent->BaroAlt); blackboxWriteSignedVB(blackboxCurrent->BaroAlt);
}
#endif #endif
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->gyroData[x]); blackboxWriteSignedVB(blackboxCurrent->gyroData[x]);
}
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->accSmooth[x]); blackboxWriteSignedVB(blackboxCurrent->accSmooth[x]);
}
//Motors can be below minthrottle when disarmed, but that doesn't happen much //Motors can be below minthrottle when disarmed, but that doesn't happen much
writeUnsignedVB(blackboxCurrent->motor[0] - masterConfig.escAndServoConfig.minthrottle); blackboxWriteUnsignedVB(blackboxCurrent->motor[0] - masterConfig.escAndServoConfig.minthrottle);
//Motors tend to be similar to each other //Motors tend to be similar to each other
for (x = 1; x < motorCount; x++) for (x = 1; x < motorCount; x++) {
writeSignedVB(blackboxCurrent->motor[x] - blackboxCurrent->motor[0]); blackboxWriteSignedVB(blackboxCurrent->motor[x] - blackboxCurrent->motor[0]);
}
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_TRICOPTER)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_TRICOPTER)) {
writeSignedVB(blackboxHistory[0]->servo[5] - 1500); blackboxWriteSignedVB(blackboxHistory[0]->servo[5] - 1500);
}
//Rotate our history buffers: //Rotate our history buffers:
@ -795,36 +497,41 @@ static void writeInterframe(void)
* Since the difference between the difference between successive times will be nearly zero (due to consistent * Since the difference between the difference between successive times will be nearly zero (due to consistent
* looptime spacing), use second-order differences. * looptime spacing), use second-order differences.
*/ */
writeSignedVB((int32_t) (blackboxHistory[0]->time - 2 * blackboxHistory[1]->time + blackboxHistory[2]->time)); blackboxWriteSignedVB((int32_t) (blackboxHistory[0]->time - 2 * blackboxHistory[1]->time + blackboxHistory[2]->time));
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxCurrent->axisPID_P[x] - blackboxLast->axisPID_P[x]); blackboxWriteSignedVB(blackboxCurrent->axisPID_P[x] - blackboxLast->axisPID_P[x]);
}
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
deltas[x] = blackboxCurrent->axisPID_I[x] - blackboxLast->axisPID_I[x]; deltas[x] = blackboxCurrent->axisPID_I[x] - blackboxLast->axisPID_I[x];
}
/* /*
* The PID I field changes very slowly, most of the time +-2, so use an encoding * The PID I field changes very slowly, most of the time +-2, so use an encoding
* that can pack all three fields into one byte in that situation. * that can pack all three fields into one byte in that situation.
*/ */
writeTag2_3S32(deltas); blackboxWriteTag2_3S32(deltas);
/* /*
* The PID D term is frequently set to zero for yaw, which makes the result from the calculation * The PID D term is frequently set to zero for yaw, which makes the result from the calculation
* always zero. So don't bother recording D results when PID D terms are zero. * always zero. So don't bother recording D results when PID D terms are zero.
*/ */
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NONZERO_PID_D_0 + x)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NONZERO_PID_D_0 + x)) {
writeSignedVB(blackboxCurrent->axisPID_D[x] - blackboxLast->axisPID_D[x]); blackboxWriteSignedVB(blackboxCurrent->axisPID_D[x] - blackboxLast->axisPID_D[x]);
}
}
/* /*
* RC tends to stay the same or fairly small for many frames at a time, so use an encoding that * RC tends to stay the same or fairly small for many frames at a time, so use an encoding that
* can pack multiple values per byte: * can pack multiple values per byte:
*/ */
for (x = 0; x < 4; x++) for (x = 0; x < 4; x++) {
deltas[x] = blackboxCurrent->rcCommand[x] - blackboxLast->rcCommand[x]; deltas[x] = blackboxCurrent->rcCommand[x] - blackboxLast->rcCommand[x];
}
writeTag8_4S16(deltas); blackboxWriteTag8_4S16(deltas);
//Check for sensors that are updated periodically (so deltas are normally zero) VBAT, Amperage, MAG, BARO //Check for sensors that are updated periodically (so deltas are normally zero) VBAT, Amperage, MAG, BARO
int optionalFieldCount = 0; int optionalFieldCount = 0;
@ -839,29 +546,35 @@ static void writeInterframe(void)
#ifdef MAG #ifdef MAG
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_MAG)) { if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_MAG)) {
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
deltas[optionalFieldCount++] = blackboxCurrent->magADC[x] - blackboxLast->magADC[x]; deltas[optionalFieldCount++] = blackboxCurrent->magADC[x] - blackboxLast->magADC[x];
} }
}
#endif #endif
#ifdef BARO #ifdef BARO
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_BARO)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_BARO)) {
deltas[optionalFieldCount++] = blackboxCurrent->BaroAlt - blackboxLast->BaroAlt; deltas[optionalFieldCount++] = blackboxCurrent->BaroAlt - blackboxLast->BaroAlt;
}
#endif #endif
writeTag8_8SVB(deltas, optionalFieldCount); blackboxWriteTag8_8SVB(deltas, optionalFieldCount);
//Since gyros, accs and motors are noisy, base the prediction on the average of the history: //Since gyros, accs and motors are noisy, base the prediction on the average of the history:
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxHistory[0]->gyroData[x] - (blackboxHistory[1]->gyroData[x] + blackboxHistory[2]->gyroData[x]) / 2); blackboxWriteSignedVB(blackboxHistory[0]->gyroData[x] - (blackboxHistory[1]->gyroData[x] + blackboxHistory[2]->gyroData[x]) / 2);
}
for (x = 0; x < XYZ_AXIS_COUNT; x++) for (x = 0; x < XYZ_AXIS_COUNT; x++) {
writeSignedVB(blackboxHistory[0]->accSmooth[x] - (blackboxHistory[1]->accSmooth[x] + blackboxHistory[2]->accSmooth[x]) / 2); blackboxWriteSignedVB(blackboxHistory[0]->accSmooth[x] - (blackboxHistory[1]->accSmooth[x] + blackboxHistory[2]->accSmooth[x]) / 2);
}
for (x = 0; x < motorCount; x++) for (x = 0; x < motorCount; x++) {
writeSignedVB(blackboxHistory[0]->motor[x] - (blackboxHistory[1]->motor[x] + blackboxHistory[2]->motor[x]) / 2); blackboxWriteSignedVB(blackboxHistory[0]->motor[x] - (blackboxHistory[1]->motor[x] + blackboxHistory[2]->motor[x]) / 2);
}
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_TRICOPTER)) if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_TRICOPTER)) {
writeSignedVB(blackboxCurrent->servo[5] - blackboxLast->servo[5]); blackboxWriteSignedVB(blackboxCurrent->servo[5] - blackboxLast->servo[5]);
}
//Rotate our history buffers //Rotate our history buffers
blackboxHistory[2] = blackboxHistory[1]; blackboxHistory[2] = blackboxHistory[1];
@ -871,8 +584,10 @@ static void writeInterframe(void)
static int gcd(int num, int denom) static int gcd(int num, int denom)
{ {
if (denom == 0) if (denom == 0) {
return num; return num;
}
return gcd(denom, num % denom); return gcd(denom, num % denom);
} }
@ -892,59 +607,12 @@ static void validateBlackboxConfig()
} }
} }
static void configureBlackboxPort(void)
{
blackboxPort = findOpenSerialPort(FUNCTION_BLACKBOX);
if (blackboxPort) {
previousPortMode = blackboxPort->mode;
previousBaudRate = blackboxPort->baudRate;
serialSetBaudRate(blackboxPort, BLACKBOX_BAUDRATE);
serialSetMode(blackboxPort, BLACKBOX_INITIAL_PORT_MODE);
beginSerialPortFunction(blackboxPort, FUNCTION_BLACKBOX);
} else {
blackboxPort = openSerialPort(FUNCTION_BLACKBOX, NULL, BLACKBOX_BAUDRATE, BLACKBOX_INITIAL_PORT_MODE, SERIAL_NOT_INVERTED);
if (blackboxPort) {
previousPortMode = blackboxPort->mode;
previousBaudRate = blackboxPort->baudRate;
}
}
/*
* We want to write at about 7200 bytes per second to give the OpenLog a good chance to save to disk. If
* about looptime microseconds elapse between our writes, this is the budget of how many bytes we should
* transmit with each write.
*
* 9 / 1250 = 7200 / 1000000
*/
serialChunkSize = MAX((masterConfig.looptime * 9) / 1250, 4);
}
static void releaseBlackboxPort(void)
{
serialSetMode(blackboxPort, previousPortMode);
serialSetBaudRate(blackboxPort, previousBaudRate);
endSerialPortFunction(blackboxPort, FUNCTION_BLACKBOX);
/*
* Normally this would be handled by mw.c, but since we take an unknown amount
* of time to shut down asynchronously, we're the only ones that know when to call it.
*/
if (isSerialPortFunctionShared(FUNCTION_BLACKBOX, FUNCTION_MSP)) {
mspAllocateSerialPorts(&masterConfig.serialConfig);
}
}
void startBlackbox(void) void startBlackbox(void)
{ {
if (blackboxState == BLACKBOX_STATE_STOPPED) { if (blackboxState == BLACKBOX_STATE_STOPPED) {
validateBlackboxConfig(); validateBlackboxConfig();
configureBlackboxPort(); if (!blackboxDeviceOpen()) {
if (!blackboxPort) {
blackboxSetState(BLACKBOX_STATE_DISABLED); blackboxSetState(BLACKBOX_STATE_DISABLED);
return; return;
} }
@ -982,7 +650,7 @@ void finishBlackbox(void)
* We're shutting down in the middle of transmitting headers, so we can't log a "log completed" event. * We're shutting down in the middle of transmitting headers, so we can't log a "log completed" event.
* Just give the port back and stop immediately. * Just give the port back and stop immediately.
*/ */
releaseBlackboxPort(); blackboxDeviceClose();
blackboxSetState(BLACKBOX_STATE_STOPPED); blackboxSetState(BLACKBOX_STATE_STOPPED);
} }
} }
@ -992,8 +660,8 @@ static void writeGPSHomeFrame()
{ {
blackboxWrite('H'); blackboxWrite('H');
writeSignedVB(GPS_home[0]); blackboxWriteSignedVB(GPS_home[0]);
writeSignedVB(GPS_home[1]); blackboxWriteSignedVB(GPS_home[1]);
//TODO it'd be great if we could grab the GPS current time and write that too //TODO it'd be great if we could grab the GPS current time and write that too
gpsHistory.GPS_home[0] = GPS_home[0]; gpsHistory.GPS_home[0] = GPS_home[0];
@ -1012,15 +680,15 @@ static void writeGPSFrame()
*/ */
if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NOT_LOGGING_EVERY_FRAME)) { if (testBlackboxCondition(FLIGHT_LOG_FIELD_CONDITION_NOT_LOGGING_EVERY_FRAME)) {
// Predict the time of the last frame in the main log // Predict the time of the last frame in the main log
writeUnsignedVB(currentTime - blackboxHistory[1]->time); blackboxWriteUnsignedVB(currentTime - blackboxHistory[1]->time);
} }
writeUnsignedVB(GPS_numSat); blackboxWriteUnsignedVB(GPS_numSat);
writeSignedVB(GPS_coord[0] - gpsHistory.GPS_home[0]); blackboxWriteSignedVB(GPS_coord[0] - gpsHistory.GPS_home[0]);
writeSignedVB(GPS_coord[1] - gpsHistory.GPS_home[1]); blackboxWriteSignedVB(GPS_coord[1] - gpsHistory.GPS_home[1]);
writeUnsignedVB(GPS_altitude); blackboxWriteUnsignedVB(GPS_altitude);
writeUnsignedVB(GPS_speed); blackboxWriteUnsignedVB(GPS_speed);
writeUnsignedVB(GPS_ground_course); blackboxWriteUnsignedVB(GPS_ground_course);
gpsHistory.GPS_numSat = GPS_numSat; gpsHistory.GPS_numSat = GPS_numSat;
gpsHistory.GPS_coord[0] = GPS_coord[0]; gpsHistory.GPS_coord[0] = GPS_coord[0];
@ -1038,31 +706,39 @@ static void loadBlackboxState(void)
blackboxCurrent->time = currentTime; blackboxCurrent->time = currentTime;
for (i = 0; i < XYZ_AXIS_COUNT; i++) for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->axisPID_P[i] = axisPID_P[i]; blackboxCurrent->axisPID_P[i] = axisPID_P[i];
for (i = 0; i < XYZ_AXIS_COUNT; i++) }
for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->axisPID_I[i] = axisPID_I[i]; blackboxCurrent->axisPID_I[i] = axisPID_I[i];
for (i = 0; i < XYZ_AXIS_COUNT; i++) }
for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->axisPID_D[i] = axisPID_D[i]; blackboxCurrent->axisPID_D[i] = axisPID_D[i];
}
for (i = 0; i < 4; i++) for (i = 0; i < 4; i++) {
blackboxCurrent->rcCommand[i] = rcCommand[i]; blackboxCurrent->rcCommand[i] = rcCommand[i];
}
for (i = 0; i < XYZ_AXIS_COUNT; i++) for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->gyroData[i] = gyroData[i]; blackboxCurrent->gyroData[i] = gyroData[i];
}
for (i = 0; i < XYZ_AXIS_COUNT; i++) for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->accSmooth[i] = accSmooth[i]; blackboxCurrent->accSmooth[i] = accSmooth[i];
}
for (i = 0; i < motorCount; i++) for (i = 0; i < motorCount; i++) {
blackboxCurrent->motor[i] = motor[i]; blackboxCurrent->motor[i] = motor[i];
}
blackboxCurrent->vbatLatest = vbatLatestADC; blackboxCurrent->vbatLatest = vbatLatestADC;
blackboxCurrent->amperageLatest = amperageLatestADC; blackboxCurrent->amperageLatest = amperageLatestADC;
#ifdef MAG #ifdef MAG
for (i = 0; i < XYZ_AXIS_COUNT; i++) for (i = 0; i < XYZ_AXIS_COUNT; i++) {
blackboxCurrent->magADC[i] = magADC[i]; blackboxCurrent->magADC[i] = magADC[i];
}
#endif #endif
#ifdef BARO #ifdef BARO
@ -1103,8 +779,9 @@ static bool sendFieldDefinition(const char * const *headerNames, unsigned int he
* the whole header. * the whole header.
*/ */
if (xmitState.u.fieldIndex == -1) { if (xmitState.u.fieldIndex == -1) {
if (xmitState.headerIndex >= headerCount) if (xmitState.headerIndex >= headerCount) {
return false; //Someone probably called us again after we had already completed transmission return false; //Someone probably called us again after we had already completed transmission
}
charsWritten = blackboxPrint("H Field "); charsWritten = blackboxPrint("H Field ");
charsWritten += blackboxPrint(headerNames[xmitState.headerIndex]); charsWritten += blackboxPrint(headerNames[xmitState.headerIndex]);
@ -1115,15 +792,16 @@ static bool sendFieldDefinition(const char * const *headerNames, unsigned int he
} else } else
charsWritten = 0; charsWritten = 0;
for (; xmitState.u.fieldIndex < fieldCount && charsWritten < serialChunkSize; xmitState.u.fieldIndex++) { for (; xmitState.u.fieldIndex < fieldCount && charsWritten < blackboxWriteChunkSize; xmitState.u.fieldIndex++) {
def = (const blackboxFieldDefinition_t*) ((const char*)fieldDefinitions + definitionStride * xmitState.u.fieldIndex); def = (const blackboxFieldDefinition_t*) ((const char*)fieldDefinitions + definitionStride * xmitState.u.fieldIndex);
if (!conditions || testBlackboxCondition(conditions[conditionsStride * xmitState.u.fieldIndex])) { if (!conditions || testBlackboxCondition(conditions[conditionsStride * xmitState.u.fieldIndex])) {
if (needComma) { if (needComma) {
blackboxWrite(','); blackboxWrite(',');
charsWritten++; charsWritten++;
} else } else {
needComma = true; needComma = true;
}
// The first header is a field name // The first header is a field name
if (xmitState.headerIndex == 0) { if (xmitState.headerIndex == 0) {
@ -1169,7 +847,7 @@ static bool blackboxWriteSysinfo()
} }
// How many bytes can we afford to transmit this loop? // How many bytes can we afford to transmit this loop?
xmitState.u.serialBudget = MIN(xmitState.u.serialBudget + serialChunkSize, 64); xmitState.u.serialBudget = MIN(xmitState.u.serialBudget + blackboxWriteChunkSize, 64);
// Most headers will consume at least 20 bytes so wait until we've built up that much link budget // Most headers will consume at least 20 bytes so wait until we've built up that much link budget
if (xmitState.u.serialBudget < 20) { if (xmitState.u.serialBudget < 20) {
@ -1262,8 +940,9 @@ static bool blackboxWriteSysinfo()
*/ */
void blackboxLogEvent(FlightLogEvent event, flightLogEventData_t *data) void blackboxLogEvent(FlightLogEvent event, flightLogEventData_t *data)
{ {
if (blackboxState != BLACKBOX_STATE_RUNNING) if (blackboxState != BLACKBOX_STATE_RUNNING) {
return; return;
}
//Shared header for event frames //Shared header for event frames
blackboxWrite('E'); blackboxWrite('E');
@ -1272,7 +951,7 @@ void blackboxLogEvent(FlightLogEvent event, flightLogEventData_t *data)
//Now serialize the data for this specific frame type //Now serialize the data for this specific frame type
switch (event) { switch (event) {
case FLIGHT_LOG_EVENT_SYNC_BEEP: case FLIGHT_LOG_EVENT_SYNC_BEEP:
writeUnsignedVB(data->syncBeep.time); blackboxWriteUnsignedVB(data->syncBeep.time);
break; break;
case FLIGHT_LOG_EVENT_AUTOTUNE_CYCLE_START: case FLIGHT_LOG_EVENT_AUTOTUNE_CYCLE_START:
blackboxWrite(data->autotuneCycleStart.phase); blackboxWrite(data->autotuneCycleStart.phase);
@ -1288,11 +967,11 @@ void blackboxLogEvent(FlightLogEvent event, flightLogEventData_t *data)
blackboxWrite(data->autotuneCycleStart.d); blackboxWrite(data->autotuneCycleStart.d);
break; break;
case FLIGHT_LOG_EVENT_AUTOTUNE_TARGETS: case FLIGHT_LOG_EVENT_AUTOTUNE_TARGETS:
writeS16(data->autotuneTargets.currentAngle); blackboxWriteS16(data->autotuneTargets.currentAngle);
blackboxWrite((uint8_t) data->autotuneTargets.targetAngle); blackboxWrite((uint8_t) data->autotuneTargets.targetAngle);
blackboxWrite((uint8_t) data->autotuneTargets.targetAngleAtPeak); blackboxWrite((uint8_t) data->autotuneTargets.targetAngleAtPeak);
writeS16(data->autotuneTargets.firstPeakAngle); blackboxWriteS16(data->autotuneTargets.firstPeakAngle);
writeS16(data->autotuneTargets.secondPeakAngle); blackboxWriteS16(data->autotuneTargets.secondPeakAngle);
break; break;
case FLIGHT_LOG_EVENT_LOG_END: case FLIGHT_LOG_EVENT_LOG_END:
blackboxPrint("End of log"); blackboxPrint("End of log");
@ -1333,21 +1012,23 @@ void handleBlackbox(void)
* buffer. * buffer.
*/ */
if (millis() > xmitState.u.startTime + 100) { if (millis() > xmitState.u.startTime + 100) {
for (i = 0; i < serialChunkSize && blackboxHeader[xmitState.headerIndex] != '\0'; i++, xmitState.headerIndex++) for (i = 0; i < blackboxWriteChunkSize && blackboxHeader[xmitState.headerIndex] != '\0'; i++, xmitState.headerIndex++) {
blackboxWrite(blackboxHeader[xmitState.headerIndex]); blackboxWrite(blackboxHeader[xmitState.headerIndex]);
}
if (blackboxHeader[xmitState.headerIndex] == '\0') if (blackboxHeader[xmitState.headerIndex] == '\0') {
blackboxSetState(BLACKBOX_STATE_SEND_FIELDINFO); blackboxSetState(BLACKBOX_STATE_SEND_FIELDINFO);
} }
}
break; break;
case BLACKBOX_STATE_SEND_FIELDINFO: case BLACKBOX_STATE_SEND_FIELDINFO:
//On entry of this state, xmitState.headerIndex is 0 and xmitState.u.fieldIndex is -1 //On entry of this state, xmitState.headerIndex is 0 and xmitState.u.fieldIndex is -1
if (!sendFieldDefinition(blackboxMainHeaderNames, ARRAY_LENGTH(blackboxMainHeaderNames), blackboxMainFields, blackboxMainFields + 1, if (!sendFieldDefinition(blackboxMainHeaderNames, ARRAY_LENGTH(blackboxMainHeaderNames), blackboxMainFields, blackboxMainFields + 1,
ARRAY_LENGTH(blackboxMainFields), &blackboxMainFields[0].condition, &blackboxMainFields[1].condition)) { ARRAY_LENGTH(blackboxMainFields), &blackboxMainFields[0].condition, &blackboxMainFields[1].condition)) {
#ifdef GPS #ifdef GPS
if (feature(FEATURE_GPS)) if (feature(FEATURE_GPS)) {
blackboxSetState(BLACKBOX_STATE_SEND_GPS_H_HEADERS); blackboxSetState(BLACKBOX_STATE_SEND_GPS_H_HEADERS);
else } else
#endif #endif
blackboxSetState(BLACKBOX_STATE_SEND_SYSINFO); blackboxSetState(BLACKBOX_STATE_SEND_SYSINFO);
} }
@ -1372,8 +1053,9 @@ void handleBlackbox(void)
//On entry of this state, xmitState.headerIndex is 0 //On entry of this state, xmitState.headerIndex is 0
//Keep writing chunks of the system info headers until it returns true to signal completion //Keep writing chunks of the system info headers until it returns true to signal completion
if (blackboxWriteSysinfo()) if (blackboxWriteSysinfo()) {
blackboxSetState(BLACKBOX_STATE_PRERUN); blackboxSetState(BLACKBOX_STATE_PRERUN);
}
break; break;
case BLACKBOX_STATE_PRERUN: case BLACKBOX_STATE_PRERUN:
blackboxSetState(BLACKBOX_STATE_RUNNING); blackboxSetState(BLACKBOX_STATE_RUNNING);
@ -1425,7 +1107,7 @@ void handleBlackbox(void)
} }
break; break;
case BLACKBOX_STATE_SHUTTING_DOWN: case BLACKBOX_STATE_SHUTTING_DOWN:
//On entry of this state, startTime is set //On entry of this state, startTime is set and a flush is performed
/* /*
* Wait for the log we've transmitted to make its way to the logger before we release the serial port, * Wait for the log we've transmitted to make its way to the logger before we release the serial port,
@ -1433,8 +1115,8 @@ void handleBlackbox(void)
* *
* Don't wait longer than it could possibly take if something funky happens. * Don't wait longer than it could possibly take if something funky happens.
*/ */
if (millis() > xmitState.u.startTime + 200 || isSerialTransmitBufferEmpty(blackboxPort)) { if (millis() > xmitState.u.startTime + 200 || isBlackboxDeviceIdle()) {
releaseBlackboxPort(); blackboxDeviceClose();
blackboxSetState(BLACKBOX_STATE_STOPPED); blackboxSetState(BLACKBOX_STATE_STOPPED);
} }
break; break;
@ -1445,16 +1127,14 @@ void handleBlackbox(void)
static bool canUseBlackboxWithCurrentConfiguration(void) static bool canUseBlackboxWithCurrentConfiguration(void)
{ {
if (!feature(FEATURE_BLACKBOX)) return feature(FEATURE_BLACKBOX);
return false;
return true;
} }
void initBlackbox(void) void initBlackbox(void)
{ {
if (canUseBlackboxWithCurrentConfiguration()) if (canUseBlackboxWithCurrentConfiguration()) {
blackboxSetState(BLACKBOX_STATE_STOPPED); blackboxSetState(BLACKBOX_STATE_STOPPED);
else } else {
blackboxSetState(BLACKBOX_STATE_DISABLED); blackboxSetState(BLACKBOX_STATE_DISABLED);
}
} }

437
src/main/blackbox/blackbox_io.c Normal file
View File

@ -0,0 +1,437 @@
#include <stdlib.h>
#include <stdarg.h>
#include "blackbox_io.h"
#include "platform.h"
#include "version.h"
#include "common/maths.h"
#include "common/axis.h"
#include "common/color.h"
#include "drivers/gpio.h"
#include "drivers/sensor.h"
#include "drivers/system.h"
#include "drivers/serial.h"
#include "drivers/compass.h"
#include "drivers/timer.h"
#include "drivers/pwm_rx.h"
#include "drivers/accgyro.h"
#include "drivers/light_led.h"
#include "drivers/sound_beeper.h"
#include "flight/flight.h"
#include "sensors/sensors.h"
#include "sensors/boardalignment.h"
#include "sensors/acceleration.h"
#include "sensors/barometer.h"
#include "sensors/gyro.h"
#include "sensors/battery.h"
#include "io/beeper.h"
#include "io/display.h"
#include "io/escservo.h"
#include "rx/rx.h"
#include "io/rc_controls.h"
#include "flight/mixer.h"
#include "flight/altitudehold.h"
#include "flight/failsafe.h"
#include "flight/imu.h"
#include "flight/autotune.h"
#include "flight/navigation.h"
#include "io/gimbal.h"
#include "io/gps.h"
#include "io/ledstrip.h"
#include "io/serial.h"
#include "io/serial_cli.h"
#include "io/serial_msp.h"
#include "io/statusindicator.h"
#include "rx/msp.h"
#include "telemetry/telemetry.h"
#include "common/printf.h"
#include "config/runtime_config.h"
#include "config/config.h"
#include "config/config_profile.h"
#include "config/config_master.h"
#define BLACKBOX_BAUDRATE 115200
#define BLACKBOX_INITIAL_PORT_MODE MODE_TX
// How many bytes should we transmit per loop iteration?
uint8_t blackboxWriteChunkSize = 16;
static serialPort_t *blackboxPort;
static portMode_t previousPortMode;
static uint32_t previousBaudRate;
void blackboxWrite(uint8_t value)
{
serialWrite(blackboxPort, value);
}
static void _putc(void *p, char c)
{
(void)p;
blackboxWrite(c);
}
//printf() to the blackbox serial port with no blocking shenanigans (so it's caller's responsibility to not write too fast!)
void blackboxPrintf(char *fmt, ...)
{
va_list va;
va_start(va, fmt);
tfp_format(NULL, _putc, fmt, va);
va_end(va);
}
// Print the null-terminated string 's' to the serial port and return the number of bytes written
int blackboxPrint(const char *s)
{
const char *pos = s;
while (*pos) {
blackboxWrite(*pos);
pos++;
}
return pos - s;
}
/**
* Write an unsigned integer to the blackbox serial port using variable byte encoding.
*/
void blackboxWriteUnsignedVB(uint32_t value)
{
//While this isn't the final byte (we can only write 7 bits at a time)
while (value > 127) {
blackboxWrite((uint8_t) (value | 0x80)); // Set the high bit to mean "more bytes follow"
value >>= 7;
}
blackboxWrite(value);
}
/**
* Write a signed integer to the blackbox serial port using ZigZig and variable byte encoding.
*/
void blackboxWriteSignedVB(int32_t value)
{
//ZigZag encode to make the value always positive
blackboxWriteUnsignedVB((uint32_t)((value << 1) ^ (value >> 31)));
}
void blackboxWriteS16(int16_t value)
{
blackboxWrite(value & 0xFF);
blackboxWrite((value >> 8) & 0xFF);
}
/**
* Write a 2 bit tag followed by 3 signed fields of 2, 4, 6 or 32 bits
*/
void blackboxWriteTag2_3S32(int32_t *values) {
static const int NUM_FIELDS = 3;
//Need to be enums rather than const ints if we want to switch on them (due to being C)
enum {
BITS_2 = 0,
BITS_4 = 1,
BITS_6 = 2,
BITS_32 = 3
};
enum {
BYTES_1 = 0,
BYTES_2 = 1,
BYTES_3 = 2,
BYTES_4 = 3
};
int x;
int selector = BITS_2, selector2;
/*
* Find out how many bits the largest value requires to encode, and use it to choose one of the packing schemes
* below:
*
* Selector possibilities
*
* 2 bits per field ss11 2233,
* 4 bits per field ss00 1111 2222 3333
* 6 bits per field ss11 1111 0022 2222 0033 3333
* 32 bits per field sstt tttt followed by fields of various byte counts
*/
for (x = 0; x < NUM_FIELDS; x++) {
//Require more than 6 bits?
if (values[x] >= 32 || values[x] < -32) {
selector = BITS_32;
break;
}
//Require more than 4 bits?
if (values[x] >= 8 || values[x] < -8) {
if (selector < BITS_6) {
selector = BITS_6;
}
} else if (values[x] >= 2 || values[x] < -2) { //Require more than 2 bits?
if (selector < BITS_4) {
selector = BITS_4;
}
}
}
switch (selector) {
case BITS_2:
blackboxWrite((selector << 6) | ((values[0] & 0x03) << 4) | ((values[1] & 0x03) << 2) | (values[2] & 0x03));
break;
case BITS_4:
blackboxWrite((selector << 6) | (values[0] & 0x0F));
blackboxWrite((values[1] << 4) | (values[2] & 0x0F));
break;
case BITS_6:
blackboxWrite((selector << 6) | (values[0] & 0x3F));
blackboxWrite((uint8_t)values[1]);
blackboxWrite((uint8_t)values[2]);
break;
case BITS_32:
/*
* Do another round to compute a selector for each field, assuming that they are at least 8 bits each
*
* Selector2 field possibilities
* 0 - 8 bits
* 1 - 16 bits
* 2 - 24 bits
* 3 - 32 bits
*/
selector2 = 0;
//Encode in reverse order so the first field is in the low bits:
for (x = NUM_FIELDS - 1; x >= 0; x--) {
selector2 <<= 2;
if (values[x] < 128 && values[x] >= -128) {
selector2 |= BYTES_1;
} else if (values[x] < 32768 && values[x] >= -32768) {
selector2 |= BYTES_2;
} else if (values[x] < 8388608 && values[x] >= -8388608) {
selector2 |= BYTES_3;
} else {
selector2 |= BYTES_4;
}
}
//Write the selectors
blackboxWrite((selector << 6) | selector2);
//And now the values according to the selectors we picked for them
for (x = 0; x < NUM_FIELDS; x++, selector2 >>= 2) {
switch (selector2 & 0x03) {
case BYTES_1:
blackboxWrite(values[x]);
break;
case BYTES_2:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
break;
case BYTES_3:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x] >> 16);
break;
case BYTES_4:
blackboxWrite(values[x]);
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x] >> 16);
blackboxWrite(values[x] >> 24);
break;
}
}
break;
}
}
/**
* Write an 8-bit selector followed by four signed fields of size 0, 4, 8 or 16 bits.
*/
void blackboxWriteTag8_4S16(int32_t *values) {
//Need to be enums rather than const ints if we want to switch on them (due to being C)
enum {
FIELD_ZERO = 0,
FIELD_4BIT = 1,
FIELD_8BIT = 2,
FIELD_16BIT = 3
};
uint8_t selector, buffer;
int nibbleIndex;
int x;
selector = 0;
//Encode in reverse order so the first field is in the low bits:
for (x = 3; x >= 0; x--) {
selector <<= 2;
if (values[x] == 0) {
selector |= FIELD_ZERO;
} else if (values[x] < 8 && values[x] >= -8) {
selector |= FIELD_4BIT;
} else if (values[x] < 128 && values[x] >= -128) {
selector |= FIELD_8BIT;
} else {
selector |= FIELD_16BIT;
}
}
blackboxWrite(selector);
nibbleIndex = 0;
buffer = 0;
for (x = 0; x < 4; x++, selector >>= 2) {
switch (selector & 0x03) {
case FIELD_ZERO:
//No-op
break;
case FIELD_4BIT:
if (nibbleIndex == 0) {
//We fill high-bits first
buffer = values[x] << 4;
nibbleIndex = 1;
} else {
blackboxWrite(buffer | (values[x] & 0x0F));
nibbleIndex = 0;
}
break;
case FIELD_8BIT:
if (nibbleIndex == 0) {
blackboxWrite(values[x]);
} else {
//Write the high bits of the value first (mask to avoid sign extension)
blackboxWrite(buffer | ((values[x] >> 4) & 0x0F));
//Now put the leftover low bits into the top of the next buffer entry
buffer = values[x] << 4;
}
break;
case FIELD_16BIT:
if (nibbleIndex == 0) {
//Write high byte first
blackboxWrite(values[x] >> 8);
blackboxWrite(values[x]);
} else {
//First write the highest 4 bits
blackboxWrite(buffer | ((values[x] >> 12) & 0x0F));
// Then the middle 8
blackboxWrite(values[x] >> 4);
//Only the smallest 4 bits are still left to write
buffer = values[x] << 4;
}
break;
}
}
//Anything left over to write?
if (nibbleIndex == 1) {
blackboxWrite(buffer);
}
}
/**
* Write `valueCount` fields from `values` to the Blackbox using signed variable byte encoding. A 1-byte header is
* written first which specifies which fields are non-zero (so this encoding is compact when most fields are zero).
*
* valueCount must be 8 or less.
*/
void blackboxWriteTag8_8SVB(int32_t *values, int valueCount)
{
uint8_t header;
int i;
if (valueCount > 0) {
//If we're only writing one field then we can skip the header
if (valueCount == 1) {
blackboxWriteSignedVB(values[0]);
} else {
//First write a one-byte header that marks which fields are non-zero
header = 0;
// First field should be in low bits of header
for (i = valueCount - 1; i >= 0; i--) {
header <<= 1;
if (values[i] != 0) {
header |= 0x01;
}
}
blackboxWrite(header);
for (i = 0; i < valueCount; i++) {
if (values[i] != 0) {
blackboxWriteSignedVB(values[i]);
}
}
}
}
}
/**
* If there is data waiting to be written to the blackbox device, attempt to write that now.
*/
void blackboxDeviceFlush(void)
{
//Presently a no-op on serial
}
/**
* Attempt to open the logging device. Returns true if successful.
*/
bool blackboxDeviceOpen(void)
{
blackboxPort = findOpenSerialPort(FUNCTION_BLACKBOX);
if (blackboxPort) {
previousPortMode = blackboxPort->mode;
previousBaudRate = blackboxPort->baudRate;
serialSetBaudRate(blackboxPort, BLACKBOX_BAUDRATE);
serialSetMode(blackboxPort, BLACKBOX_INITIAL_PORT_MODE);
beginSerialPortFunction(blackboxPort, FUNCTION_BLACKBOX);
} else {
blackboxPort = openSerialPort(FUNCTION_BLACKBOX, NULL, BLACKBOX_BAUDRATE, BLACKBOX_INITIAL_PORT_MODE, SERIAL_NOT_INVERTED);
if (blackboxPort) {
previousPortMode = blackboxPort->mode;
previousBaudRate = blackboxPort->baudRate;
}
}
/*
* We want to write at about 7200 bytes per second to give the OpenLog a good chance to save to disk. If
* about looptime microseconds elapse between our writes, this is the budget of how many bytes we should
* transmit with each write.
*
* 9 / 1250 = 7200 / 1000000
*/
blackboxWriteChunkSize = MAX((masterConfig.looptime * 9) / 1250, 4);
return blackboxPort != NULL;
}
void blackboxDeviceClose(void)
{
serialSetMode(blackboxPort, previousPortMode);
serialSetBaudRate(blackboxPort, previousBaudRate);
endSerialPortFunction(blackboxPort, FUNCTION_BLACKBOX);
/*
* Normally this would be handled by mw.c, but since we take an unknown amount
* of time to shut down asynchronously, we're the only ones that know when to call it.
*/
if (isSerialPortFunctionShared(FUNCTION_BLACKBOX, FUNCTION_MSP)) {
mspAllocateSerialPorts(&masterConfig.serialConfig);
}
}
bool isBlackboxDeviceIdle(void)
{
return isSerialTransmitBufferEmpty(blackboxPort);
}

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src/main/blackbox/blackbox_io.h Normal file
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/*
* This file is part of Cleanflight.
*
* Cleanflight 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.
*
* Cleanflight 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 Cleanflight. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
uint8_t blackboxWriteChunkSize;
void blackboxWrite(uint8_t value);
void blackboxPrintf(char *fmt, ...);
int blackboxPrint(const char *s);
void blackboxWriteUnsignedVB(uint32_t value);
void blackboxWriteSignedVB(int32_t value);
void blackboxWriteS16(int16_t value);
void blackboxWriteTag2_3S32(int32_t *values);
void blackboxWriteTag8_4S16(int32_t *values);
void blackboxWriteTag8_8SVB(int32_t *values, int valueCount);
void blackboxDeviceFlush(void);
bool blackboxDeviceOpen(void);
void blackboxDeviceClose(void);
bool isBlackboxDeviceIdle(void);