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Add SNOOPIE module

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This commit is contained in:
Andrew Kay
2022-02-19 10:04:17 -06:00
parent 614f8a5f44
commit 1a6a0e9b80
12 changed files with 461 additions and 2 deletions
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37
interface2/firmware/src/coax.cpp
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@@ -246,10 +246,16 @@ void Coax::handleInterrupt()
}
}
int Coax::snoopie(uint16_t *buffer, size_t bufferSize, uint8_t *writeIndex)
{
return _spiCoaxTransceiver.snoopie(buffer, bufferSize, writeIndex);
}
#define COAX_COMMAND_READ_REGISTER 0x2
#define COAX_COMMAND_WRITE_REGISTER 0x3
#define COAX_COMMAND_TX 0x4
#define COAX_COMMAND_RX 0x5
#define COAX_COMMAND_SNOOPIE 0x6
#define COAX_COMMAND_RESET 0xff
#define NOP asm volatile("nop\n\t")
@@ -511,6 +517,37 @@ void SPICoaxTransceiver::setRXParity(CoaxParity parity)
writeRegister(COAX_REGISTER_CONTROL, parity == CoaxParity::Even ? COAX_REGISTER_CONTROL_RX_PARITY : 0, COAX_REGISTER_CONTROL_RX_PARITY);
}
int SPICoaxTransceiver::snoopie(uint16_t *buffer, size_t bufferSize, uint8_t *writeIndex)
{
uint8_t transmitBuffer[2] = { COAX_COMMAND_SNOOPIE };
uint8_t receiveBuffer[2];
ATOMIC_BLOCK_START;
LL_GPIO_ResetOutputPin(ICE40_CS_GPIO_Port, ICE40_CS_Pin);
spiTransfer(transmitBuffer, NULL, 1);
transmitBuffer[0] = 0x00;
transmitBuffer[1] = 0x00;
spiTransfer(transmitBuffer, receiveBuffer, 1);
*writeIndex = receiveBuffer[0];
for (size_t index = 0; index < bufferSize; index++) {
spiTransfer(transmitBuffer, receiveBuffer, 2);
uint16_t value = (receiveBuffer[0] << 8) | receiveBuffer[1];
buffer[index] = value;
}
LL_GPIO_SetOutputPin(ICE40_CS_GPIO_Port, ICE40_CS_Pin);
ATOMIC_BLOCK_END;
return 0;
}
void SPICoaxTransceiver::spiTransfer(const uint8_t *transmitBuffer,
uint8_t *receiveBuffer, size_t count)
{