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New serial protocol

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This commit is contained in:
Andrew Kay
2020-03-23 19:35:21 -05:00
parent f4be7f39a2
commit f89f9b16d7
26 changed files with 530 additions and 945 deletions
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47
interface1/firmware/CoaxTransceiver.cpp
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@@ -85,14 +85,14 @@ static void CoaxTransceiver::setup() {
txSetup();
}
static int /* ssize_t */ CoaxTransceiver::transmitReceive(uint16_t commandWord, uint8_t *dataBuffer, size_t dataBufferCount, uint16_t *receiveBuffer, size_t receiveBufferSize, uint16_t timeout) {
int returnValue = transmit(commandWord, dataBuffer, dataBufferCount);
static int /* ssize_t */ CoaxTransceiver::transmitReceive(uint16_t *transmitBuffer, size_t transmitBufferCount, uint16_t *receiveBuffer, size_t receiveBufferSize, uint16_t receiveTimeout) {
int returnValue = transmit(transmitBuffer, transmitBufferCount);
if (returnValue < 0) {
return returnValue;
}
return receive(receiveBuffer, receiveBufferSize, timeout);
return receive(receiveBuffer, receiveBufferSize, receiveTimeout);
}
static void CoaxTransceiver::dataBusSetup() {
@@ -158,7 +158,7 @@ static void CoaxTransceiver::txSetup() {
pinMode(TX_REGISTERS_FULL_PIN, INPUT);
}
static int /* ssize_t */ CoaxTransceiver::transmit(uint16_t commandWord, uint8_t *dataBuffer, size_t dataCount) {
static int /* ssize_t */ CoaxTransceiver::transmit(uint16_t *buffer, size_t bufferCount) {
// Ensure receiver is inactive.
if (rxState != RX_STATE_DISABLED) {
return ERROR_TX_RECEIVER_ACTIVE;
@@ -178,35 +178,20 @@ static int /* ssize_t */ CoaxTransceiver::transmit(uint16_t commandWord, uint8_t
DDRA = B11111111;
DDRC = B00000011;
// Send command word - we make an assumption here that TX_REGISTERS_FULL is not set.
PORTC = (PINC & 0xfc) | ((commandWord >> 8) & 0x3);
PORTA = commandWord & 0xff;
PORTE &= ~0x20; // TX Register Load - Low (Load)
PORTE |= 0x20; // TX Register Load - High
// Send data - offload parity computation to DP8340.
if (dataCount > 0) {
// Enable transmitter parity calculation.
PORTH &= ~0x08; // TX Parity Control - Low
// Transmit.
for (int index = 0; index < bufferCount; index++) {
uint16_t data = buffer[index];
for (int index = 0; index < dataCount; index++) {
// Wait while TX Registers Full is high.
while ( (PING & 0x20) == 0x20) {
NOP;
}
uint8_t data = dataBuffer[index];
PORTC = (PINC & 0xfc) | ((data >> 6) & 0x3);
PORTA = (data << 2);
PORTE &= ~0x20; // TX Register Load - Low (Load)
PORTE |= 0x20; // TX Register Load - High
// Wait while TX Registers Full is high.
while ((PING & 0x20) == 0x20) {
NOP;
}
// Disable transmitter parity calculation.
PORTH |= 0x08; // TX Parity Control - High
PORTC = (PINC & 0xfc) | ((data >> 8) & 0x3);
PORTA = data & 0xff;
PORTE &= ~0x20; // TX Register Load - Low (Load)
PORTE |= 0x20; // TX Register Load - High
}
// Configure data bus for input.
@@ -219,7 +204,7 @@ static int /* ssize_t */ CoaxTransceiver::transmit(uint16_t commandWord, uint8_t
// Enable interrupts.
interrupts();
return dataCount;
return bufferCount;
}
static int /* ssize_t */ CoaxTransceiver::receive(uint16_t *buffer, size_t bufferSize, uint16_t timeout) {