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Bugfix: Transmit packages of size MAX_PACKET_SIZE (5) as well

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This commit is contained in:
Harald Barth 2021-03-12 22:12:13 +01:00
parent d35529e94a
commit 98071602c3
4 changed files with 16 additions and 5 deletions
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8
DCC.cpp
View File

@ -198,6 +198,10 @@ void DCC::setAccessory(int address, byte number, bool activate) {
DCCWaveform::mainTrack.schedulePacket(b, 2, 4); // Repeat the packet four times
}
//
// writeCVByteMain: Write a byte with PoM on main. This writes
// the 5 byte sized packet to implement this DCC function
//
void DCC::writeCVByteMain(int cab, int cv, byte bValue) {
byte b[5];
byte nB = 0;
@ -212,6 +216,10 @@ void DCC::writeCVByteMain(int cab, int cv, byte bValue) {
DCCWaveform::mainTrack.schedulePacket(b, nB, 4);
}
//
// writeCVBitMain: Write a bit of a byte with PoM on main. This writes
// the 5 byte sized packet to implement this DCC function
//
void DCC::writeCVBitMain(int cab, int cv, byte bNum, bool bValue) {
byte b[5];
byte nB = 0;

3
DCCWaveform.cpp
View File

@ -256,7 +256,7 @@ void DCCWaveform::interrupt2() {
// Wait until there is no packet pending, then make this pending
void DCCWaveform::schedulePacket(const byte buffer[], byte byteCount, byte repeats) {
if (byteCount >= MAX_PACKET_SIZE) return; // allow for chksum
if (byteCount > MAX_PACKET_SIZE) return; // allow for chksum
while (packetPending);
byte checksum = 0;
@ -264,6 +264,7 @@ void DCCWaveform::schedulePacket(const byte buffer[], byte byteCount, byte repea
checksum ^= buffer[b];
pendingPacket[b] = buffer[b];
}
// buffer is MAX_PACKET_SIZE but pendingPacket is one bigger
pendingPacket[byteCount] = checksum;
pendingLength = byteCount + 1;
pendingRepeats = repeats;

6
DCCWaveform.h
View File

@ -29,7 +29,7 @@ const int POWER_SAMPLE_OVERLOAD_WAIT = 20;
// Number of preamble bits.
const int PREAMBLE_BITS_MAIN = 16;
const int PREAMBLE_BITS_PROG = 22;
const byte MAX_PACKET_SIZE = 5; // NMRA standard exrtended packets
const byte MAX_PACKET_SIZE = 5; // NMRA standard extended packets, payload size WITHOUT checksum.
// The WAVE_STATE enum is deliberately numbered because a change of order would be catastrophic
// to the transform array.
@ -119,7 +119,7 @@ class DCCWaveform {
bool isMainTrack;
MotorDriver* motorDriver;
// Transmission controller
byte transmitPacket[MAX_PACKET_SIZE]; // packet being transmitted
byte transmitPacket[MAX_PACKET_SIZE+1]; // +1 for checksum
byte transmitLength;
byte transmitRepeats; // remaining repeats of transmission
byte remainingPreambles;
@ -127,7 +127,7 @@ class DCCWaveform {
byte bits_sent; // 0-8 (yes 9 bits) sent for current byte
byte bytes_sent; // number of bytes sent from transmitPacket
WAVE_STATE state; // wave generator state machine
byte pendingPacket[MAX_PACKET_SIZE];
byte pendingPacket[MAX_PACKET_SIZE+1]; // +1 for checksum
byte pendingLength;
byte pendingRepeats;
int lastCurrent;

4
version.h
View File

@ -3,7 +3,9 @@
#include "StringFormatter.h"
#define VERSION "3.0.5"
#define VERSION "3.0.6"
// 3.0.6 Includes:
// Fix Bug that did not let us transmit 5 byte sized packets like PoM
// 3.0.5 Includes:
// Fix Fn Key startup with loco ID and fix state change for F16-28
// 3.0.4 Includes: