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fpga: Add new Dino configuration register that allows triggering the DAC before the time step to dino.cpp

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Signed-off-by: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
This commit is contained in:
Niklas Eiling 2024-10-27 10:38:44 +01:00 • committed by Niklas Eiling
parent 6b0b11e720
commit bf2b18bf47
2 changed files with 32 additions and 9 deletions
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2
fpga/include/villas/fpga/ips/register.hpp
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@ -27,7 +27,7 @@ public:
void resetAllRegisters();
protected:
const size_t registerNum = 8;
const size_t registerNum = 9;
const size_t registerSize = 32;
static constexpr char registerMemory[] = "reg0";
std::list<MemoryBlockName> getMemoryBlocks() const override {

39
fpga/lib/ips/dino.cpp
View file

@ -140,6 +140,8 @@ void DinoAdc::configureHardware() {
void DinoAdc::setRegisterConfig(std::shared_ptr<Register> reg,
double sampleRate) {
constexpr double dinoClk = 25e6; // Dino is clocked with 25 Mhz
// constexpr double dinoDacDelay = 828e-9; // Delay for DAC to settle
constexpr double dinoDacDelay = 0; // Delay for DAC to settle
constexpr size_t dinoRegisterTimer = 0;
constexpr size_t dinoRegisterAdcScale = 1;
constexpr size_t dinoRegisterAdcOffset = 2;
@ -147,23 +149,43 @@ void DinoAdc::setRegisterConfig(std::shared_ptr<Register> reg,
constexpr size_t dinoRegisterStsActive = 5;
constexpr size_t dinoRegisterDacScale = 6;
constexpr size_t dinoRegisterDacOffset = 7;
constexpr size_t dinoRegisterTimerPreThresh = 8;
uint32_t dinoTimerVal = static_cast<uint32_t>(dinoClk / sampleRate);
double rateError = dinoClk / dinoTimerVal - sampleRate;
// -1 because the timer counts from 0 to the value set in the register. Should really be fixed in hardware.
uint32_t dinoTimerVal = static_cast<uint32_t>(dinoClk / sampleRate) - 1;
uint32_t dinoDacDelayCycles = static_cast<uint32_t>(dinoClk * dinoDacDelay);
double rateError = dinoClk / (dinoTimerVal + 1) - sampleRate;
reg->setRegister(
dinoRegisterTimer,
dinoTimerVal); // Timer value for generating ADC trigger signal
// The following are calibration values for the ADC and DAC. Scale
// sets an factor to be multiplied with the input value. This is the
// raw 16 bit ADC value for the ADC and the float value from VILLAS for
// the DAC. Offset is a value to be added to the result of the multiplication.
// All values are IEE 754 single precision floating point values.
// Calibration for ADC filter with C=330pF and R=2,2kOhm
reg->setRegister(dinoRegisterAdcScale,
-0.001615254F); // Scale factor for ADC value
reg->setRegister(dinoRegisterAdcOffset, 10.8061F); // Offset for ADC value
0.0016874999385349976F); // Scale factor for ADC value
reg->setRegister(dinoRegisterAdcOffset,
-11.365293957141239F); // Offset for ADC value
// Calibration for ADC filter with C=10nF and R=51Ohm
// reg->setRegister(dinoRegisterAdcScale,
// 0.0016106590470092842F); // Scale factor for ADC value
// reg->setRegister(dinoRegisterAdcOffset,
// -10.854544688476798F); // Offset for ADC value
reg->setRegister(dinoRegisterDacScale,
3448.53852516F); // Scale factor for DAC value
reg->setRegister(dinoRegisterDacOffset, 32767.5F); // Offset for DAC value
3204.7355379027363F); // Scale factor for DAC value
reg->setRegister(dinoRegisterDacOffset,
32772.159015058445F); // Offset for DAC value
reg->setRegister(dinoRegisterDacExternalTrig,
(uint32_t)0x0); // External trigger for DAC
if (dinoTimerVal > dinoDacDelayCycles) {
reg->setRegister(dinoRegisterTimerPreThresh,
dinoTimerVal - dinoDacDelayCycles);
} else {
reg->setRegister(dinoRegisterTimerPreThresh, dinoTimerVal);
}
uint32_t rate = reg->getRegister(dinoRegisterTimer);
float adcScale = reg->getRegisterFloat(dinoRegisterAdcScale);
float adcOffset = reg->getRegisterFloat(dinoRegisterAdcOffset);
@ -171,12 +193,13 @@ void DinoAdc::setRegisterConfig(std::shared_ptr<Register> reg,
float dacOffset = reg->getRegisterFloat(dinoRegisterDacOffset);
uint32_t dacExternalTrig = reg->getRegister(dinoRegisterDacExternalTrig);
uint32_t stsActive = reg->getRegister(dinoRegisterStsActive);
uint32_t ratePreThresh = reg->getRegister(dinoRegisterTimerPreThresh);
Log::get("Dino")->info(
"Check: Register configuration: TimerThresh: {}, Rate-Error: {} Hz, ADC "
"Scale: {}, ADC Offset: {}, DAC Scale: {}, DAC Offset: {}, DAC External "
"Trig: {:#x}, STS Active: {:#x}",
"Trig: {:#x}, STS Active: {:#x}, TimerPreThresh: {}",
rate, rateError, adcScale, adcOffset, dacScale, dacOffset,
dacExternalTrig, stsActive);
dacExternalTrig, stsActive, ratePreThresh);
}
DinoDac::DinoDac() : Dino() {}