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DCC API file tidying

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Cruft removal and replace (most) DCC message codes with named constants.
This commit is contained in:
Asbelos
2020-06-01 13:56:02 +01:00
parent 257a81f969
commit 23f15131a8
3 changed files with 57 additions and 50 deletions
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77
DCC.cpp
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@@ -27,21 +27,20 @@ void DCC::setThrottle( uint16_t cab, uint8_t tSpeed, bool tDirection) {
void DCC::setThrottle2( uint16_t cab, uint8_t tSpeed, bool tDirection) {
uint8_t b[5];
uint8_t b[4];
uint8_t nB = 0;
if (cab > 127)
b[nB++] = highByte(cab) | 0xC0; // convert train number into a two-byte address
b[nB++] = lowByte(cab);
b[nB++] = 0x3F; // 128-step speed control byte
b[nB++] = SET_SPEED; // 128-step speed control byte
b[nB++] = tSpeed + (tSpeed > 0) + tDirection * 128; // max speed is 126, but speed codes range from 2-127 (0=stop, 1=emergency stop)
DCCWaveform::mainTrack.schedulePacket(b, nB, 0);
}
void DCC::setFunction(int cab, byte byte1) {
uint8_t b[4];
uint8_t b[3];
uint8_t nB = 0;
if (cab > 127)
@@ -53,7 +52,7 @@ void DCC::setFunction(int cab, byte byte1) {
}
void DCC::setFunction(int cab, byte byte1, byte byte2) {
byte b[5];
byte b[4];
byte nB = 0;
if (cab > 127)
@@ -66,7 +65,7 @@ void DCC::setFunction(int cab, byte byte1, byte byte2) {
}
void DCC::setAccessory(int address, byte number, bool activate) {
byte b[3]; // save space for checksum byte
byte b[2];
b[0] = address % 64 + 128; // first byte is of the form 10AAAAAA, where AAAAAA represent 6 least signifcant bits of accessory address
b[1] = ((((address / 64) % 8) << 4) + (number % 4 << 1) + activate % 2) ^ 0xF8; // second byte is of the form 1AAACDDD, where C should be 1, and the least significant D represent activate/deactivate
@@ -75,13 +74,13 @@ void DCC::setAccessory(int address, byte number, bool activate) {
}
void DCC::writeCVByteMain(int cab, int cv, byte bValue) {
byte b[6]; // save space for checksum byte
byte b[5];
byte nB = 0;
if (cab > 127)
b[nB++] = highByte(cab) | 0xC0; // convert train number into a two-byte address
b[nB++] = lowByte(cab);
b[nB++] = cv1(0xEC, cv); // any CV>1023 will become modulus(1024) due to bit-mask of 0x03
b[nB++] = cv1(WRITE_BYTE_MAIN, cv); // any CV>1023 will become modulus(1024) due to bit-mask of 0x03
b[nB++] = cv2(cv);
b[nB++] = bValue;
@@ -89,7 +88,7 @@ void DCC::writeCVByteMain(int cab, int cv, byte bValue) {
}
void DCC::writeCVBitMain(int cab, int cv, byte bNum, bool bValue) {
byte b[6]; // save space for checksum byte
byte b[5];
byte nB = 0;
bValue = bValue % 2;
bNum = bNum % 8;
@@ -98,52 +97,51 @@ void DCC::writeCVBitMain(int cab, int cv, byte bNum, bool bValue) {
b[nB++] = highByte(cab) | 0xC0; // convert train number into a two-byte address
b[nB++] = lowByte(cab);
b[nB++] = cv1(0xE8, cv); // any CV>1023 will become modulus(1024) due to bit-mask of 0x03
b[nB++] = cv1(WRITE_BIT_MAIN, cv); // any CV>1023 will become modulus(1024) due to bit-mask of 0x03
b[nB++] = cv2(cv);
b[nB++] = 0xF0 + bValue * 8 + bNum;
b[nB++] = WRITE_BIT | (bValue?BIT_ON:BIT_OFF) | bNum;
DCCWaveform::mainTrack.schedulePacket(b, nB, 4);
}
bool DCC::writeCVByte(int cv, byte bValue) {
uint8_t message[] = {cv1(0x7C, cv), cv2(cv), bValue};
uint8_t message[] = {cv1(WRITE_BYTE, cv), cv2(cv), bValue};
DCCWaveform::progTrack.schedulePacket(message, sizeof(message), 6); // NMRA recommends 6 write or reset packets for decoder recovery time
return verifyCV(cv, bValue);
return verifyCVByte(cv, bValue);
}
bool DCC::verifyCVByte(int cv, byte value) {
byte message[] = { cv1(VERIFY_BYTE, cv), cv2(cv), value};
return DCCWaveform::progTrack.schedulePacketWithAck(message, sizeof(message), 5);
}
bool DCC::writeCVBit(int cv, byte bNum, bool bValue) {
bValue = bValue % 2;
bNum = bNum % 8;
uint8_t message[] = {cv1(0x78, cv), cv2(cv), 0xF0 + bValue * 8 + bNum};
DCCWaveform::progTrack.schedulePacket(message, sizeof(message), 6); // NMRA recommends 6 write or reset packets for decoder recovery time
/* TODO... what is the verify opcode here?
bitWrite(message[2],4,1); // change instruction code from Write Bit to Verify Bit
DCCWaveform::progTrack.schedulePacket(message,sizeof(message),6); // NMRA recommends 6 write or reset packets for decoder recovery time
*/
return true; // <<<< NOT ACCURATE... see comment above
if (bNum>=8) return false;
byte instruction=WRITE_BIT | bValue?BIT_ON:BIT_OFF | bNum;
byte message[] = {cv1(BIT_MANIPULATE, cv), cv2(cv), instruction };
DCCWaveform::progTrack.schedulePacket(message, sizeof(message), 6); // NMRA recommends 6 write or reset packets for decoder recovery time
return verifyCVBit(cv, bNum, bValue);
}
bool DCC::verifyCVBit(int cv, byte bNum, bool bValue) {
if (bNum>=8) return false;
byte instruction=VERIFY_BIT | bValue?BIT_ON:BIT_OFF | bNum;
byte message[] = {cv1(BIT_MANIPULATE, cv), cv2(cv), instruction };
return DCCWaveform::progTrack.schedulePacketWithAck(message, sizeof(message), 5); // NMRA recommends 6 write or reset packets for decoder recovery time
}
int DCC::readCV(int cv) {
byte message[] = { cv1(0x78, cv) , // any CV>1023 will become modulus(1024) due to bit-mask of 0x03
cv2(cv),
0
}; // trailing zero will be updated in loop below
byte value = 0;
// get each bit individually
for (int i = 0; i < 8; i++) {
message[2] = 0xE8 + i;
bool one=DCCWaveform::progTrack.schedulePacketWithAck(message, sizeof(message), 4); // NMRA recommends 5 read packets
value += one << i;
// get each bit individually by validating against a one.
for (int bNum = 0; bNum < 8; bNum++) {
value += verifyCVBit(cv,bNum,true) << bNum;
}
return verifyCV(cv, value) ? value : -1;
return verifyCVByte(cv, value) ? value : -1;
}
void DCC::loop() {
DCCWaveform::loop(); // powwer overload checks
// if the main track transmitter still has a pending packet, skip this loop.
@@ -167,6 +165,7 @@ void DCC::loop() {
}
///// Private helper functions below here /////////////////////
byte DCC::cv1(byte opcode, int cv) {
cv--;
return (highByte(cv) & (byte)0x03) | opcode;
@@ -176,11 +175,7 @@ byte DCC::cv2(int cv) {
return lowByte(cv);
}
bool DCC::verifyCV(int cv, byte value) {
byte message[] = { cv1(0x74, cv), cv2(cv), value};
DIAG(F("\n\nVerifying cv %d = %d"), cv, value);
return DCCWaveform::progTrack.schedulePacketWithAck(message, sizeof(message), 5);
}
void DCC::updateLocoReminder(int loco, byte tSpeed, bool forward) {
// determine speed reg for this loco