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main2.cpp
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main2.cpp
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/*
* This file is derived from libopencm3 example code.
*
* Copyright (C) 2010 Gareth McMullin <[email protected]>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#define PRNT(x)
#define PRNTLN(x)
#include <mculib/fastwiring.hpp>
#include <mculib/softi2c.hpp>
#include <mculib/si5351.hpp>
#include <mculib/dma_adc.hpp>
#include <mculib/usbserial.hpp>
#include <mculib/printf.hpp>
#include <mculib/printk.hpp>
#include <array>
#include <complex>
#include "main.hpp"
#include <board.hpp>
#include "ili9341.hpp"
#include "plot.hpp"
#include "uihw.hpp"
#include "ui.hpp"
#include "uihw.hpp"
#include "common.hpp"
#include "globals.hpp"
#include "synthesizers.hpp"
#include "vna_measurement.hpp"
#include "fifo.hpp"
#include "flash.hpp"
#include "calibration.hpp"
#include "fft.hpp"
#include "command_parser.hpp"
#include "stream_fifo.hpp"
#include "sin_rom.hpp"
#include "gain_cal.hpp"
#ifdef HAS_SELF_TEST
#include "self_test.hpp"
#endif
#include <libopencm3/stm32/timer.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/cm3/vector.h>
using namespace mculib;
using namespace std;
using namespace board;
// see https://lists.debian.org/debian-gcc/2003/07/msg00057.html
// this can be any value since we are not using shared libraries.
void* __dso_handle = (void*) &__dso_handle;
static bool outputRawSamples = false;
int cpu_mhz = 8; /* The CPU boots on internal (HSI) 8Mhz */
int lo_freq = 12000; // IF frequency, Hz
int adf4350_freqStep = 12000; // adf4350 resolution, Hz
static USBSerial serial;
static const int adcBufSize=1024; // must be power of 2
static volatile uint16_t adcBuffer[adcBufSize];
static VNAMeasurement vnaMeasurement;
static CommandParser cmdParser;
static StreamFIFO cmdInputFIFO;
static uint8_t cmdInputBuffer[128];
/* This is written in the 'measurement thread' (ADC ISR)
* But read by the 'main thread'. So make it volatile */
static volatile bool lcdInhibit = false;
float gainTable[RFSW_BBGAIN_MAX+1];
struct usbDataPoint {
//VNAObservation value;
complexf S11, S21;
int freqIndex;
} __attribute__((packed));
static usbDataPoint usbTxQueue[128];
static constexpr int usbTxQueueMask = 127;
static volatile int usbTxQueueWPos = 0;
static volatile int usbTxQueueRPos = 0;
// periods of a 1MHz clock; how often to call adc_process()
static constexpr int tim1Period = 25; // 1MHz / 25 = 40kHz
// periods of a 1MHz clock; how often to call UIHW::checkButtons
static constexpr int tim2Period = 50000; // 1MHz / 50000 = 20Hz
// value is in microseconds; increments at 40kHz by TIM1 interrupt
volatile uint32_t systemTimeCounter = 0;
static FIFO<small_function<void()>, 8> eventQueue;
static volatile bool usbDataMode = false;
static volatile bool usbCaptureMode = false;
static freqHz_t currFreqHz = 0; // current hardware tx frequency
// if nonzero, any ecal data in the next ecalIgnoreValues data points will be ignored.
// this variable is decremented every time a data point arrives, if nonzero.
static volatile int ecalIgnoreValues = 0;
static volatile int collectMeasurementType = -1;
static int collectMeasurementOffset = -1;
static int collectMeasurementState = 0;
static small_function<void()> collectMeasurementCB;
static void adc_process();
static int measurementGetDefaultGain(freqHz_t freqHz);
void cal_interpolate(void);
#define myassert(x) if(!(x)) do { errorBlink(3); } while(1)
template<unsigned int N>
static inline void pinMode(const array<Pad, N>& p, int mode) {
for(int i=0; i<(int)N; i++)
pinMode(p[i], mode);
}
static void errorBlink(int cnt) {
digitalWrite(led, HIGH);
while (1) {
for(int i=0;i<cnt;i++) {
digitalWrite(led, HIGH);
delay(200);
digitalWrite(led, LOW);
delay(200);
}
delay(1000);
}
}
#define errnoToPtr(x) ((void*)(uint32_t)(-x))
typedef void (*emitDataPoint_t)(int freqIndex, freqHz_t freqHz, VNAObservation v, const complexf* ecal, bool clipped);
// the parameters for one point in the sweep
struct sys_sweepPoint {
// populated with startFreq + i * stepFreq
int64_t freqHz = 0;
// populated with 0
uint32_t flags = 0;
// populated with 1; actual averaging factor is this multiplied by global nAverage
uint32_t nAverage = 1;
// populated with global dataPointsPerFreq
uint32_t dataPoints = 1;
// populated with 0; actual synth delay is baseDelay + extraSynthDelay + global extraSynthDelay
int16_t extraSynthDelay = 0;
// populated with 3
uint8_t adf4350_txPower = 3;
// populated with 1
uint8_t si5351_txPower = 1;
enum {
FLAG_POWERDOWN = 1,
FLAG_FORCE_ADF435X = 2,
FLAG_FORCE_SI5351 = 4,
FLAG_SKIP_SYNTH_SET = 8
};
};
struct sys_init_args {
volatile uint16_t* adcBuf;
volatile uint32_t* dmaCndtr;
uint32_t adcBufWords = 0;
emitDataPoint_t emitDataPoint;
};
struct sys_start_args {
};
struct sys_setSweep_args {
freqHz_t startFreqHz, stepFreqHz;
int nPoints, dataPointsPerFreq = 1;
uint32_t flags = 0;
// this function is called to modify the frequency or other parameters at
// each sweep point if FLAG_CUSTOMSWEEP is set.
// outParams is filled with default parameters and freqHz populated with
// startFreqHz + freqIndex * stepFreqHz when this function is called.
void (*sweepMutateParams)(int freqIndex, sys_sweepPoint* outParams);
enum {
FLAG_RFDISABLE=1,
FLAG_CUSTOMSWEEP=2
};
};
struct sys_setTimings_args {
uint32_t extraSynthDelay = 0;
uint32_t nAverage = 1;
};
typedef void* (*sys_syscall_t)(int opcode, void* args);
sys_syscall_t sys_syscall = (sys_syscall_t) 0x08000151;
sys_setSweep_args currSweepArgs;
sys_setTimings_args currTimingsArgs;
void sweepMutateParams(int freqIndex, sys_sweepPoint* outParams);
void setHWSweep(const sys_setSweep_args& sweepArgs) {
currSweepArgs = sweepArgs;
currSweepArgs.flags = sys_setSweep_args::FLAG_CUSTOMSWEEP;
currSweepArgs.sweepMutateParams = &sweepMutateParams;
sys_syscall(3, &currSweepArgs);
}
// period is in units of us
static void startTimer(uint32_t timerDevice, int period) {
// set the timer to count one tick per us
timer_set_mode(timerDevice, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP);
timer_set_prescaler(timerDevice, cpu_mhz-1);
timer_set_repetition_counter(timerDevice, 0);
timer_continuous_mode(timerDevice);
// this doesn't really set the period, but the "autoreload value"; actual period is this plus 1.
// this should be fixed in libopencm3.
timer_set_period(timerDevice, period - 1);
timer_enable_preload(timerDevice);
timer_enable_preload_complementry_enable_bits(timerDevice);
timer_enable_break_main_output(timerDevice);
timer_enable_irq(timerDevice, TIM_DIER_UIE);
TIM_EGR(timerDevice) = TIM_EGR_UG;
timer_set_counter(timerDevice, 0);
timer_enable_counter(timerDevice);
}
static void ui_timer_setup() {
rcc_periph_clock_enable(RCC_TIM2);
rcc_periph_reset_pulse(RST_TIM2);
nvic_set_priority(NVIC_TIM2_IRQ, 0x80);
nvic_enable_irq(NVIC_TIM2_IRQ);
startTimer(TIM2, tim2Period);
}
static void dsp_timer_setup() {
rcc_periph_clock_enable(RCC_TIM1);
rcc_periph_reset_pulse(RST_TIM1);
// set tim1 to highest priority
nvic_set_priority(NVIC_TIM1_UP_IRQ, 0x00);
nvic_enable_irq(NVIC_TIM1_UP_IRQ);
startTimer(TIM1, tim1Period);
}
extern "C" void tim1_up_isr() {
TIM1_SR = 0;
systemTimeCounter += tim1Period;
adc_process();
}
extern "C" void tim2_isr() {
TIM2_SR = 0;
UIHW::checkButtons();
}
static int si5351_doUpdate(uint32_t freqHz) {
// round frequency to values that can be accurately set, so that IF frequency is not wrong
// if(freqHz <= 10000000)
// freqHz = (freqHz/10) * 10;
// else
// freqHz = (freqHz/100) * 100;
return synthesizers::si5351_set(freqHz+lo_freq, freqHz);
}
static int si5351_update(uint32_t freqHz) {
static uint32_t prevFreq = 0;
int ret = si5351_doUpdate(freqHz);
if(freqHz < prevFreq)
si5351_doUpdate(freqHz);
prevFreq = freqHz;
return ret;
}
static void adf4350_setup() {
adf4350_rx.cpCurrent = 6;
adf4350_tx.cpCurrent = 6;
adf4350_rx.N = 120;
adf4350_rx.rfPower = (BOARD_REVISION >= 3 ? 0b10 : 0b00);
adf4350_rx.sendConfig();
adf4350_rx.sendN();
adf4350_tx.N = 120;
adf4350_tx.rfPower = 0b11;
adf4350_tx.sendConfig();
adf4350_tx.sendN();
}
static void adf4350_update(freqHz_t freqHz) {
adf4350_tx.rfPower = current_props._adf4350_txPower;
freqHz = freqHz_t(freqHz/adf4350_freqStep)*adf4350_freqStep;
synthesizers::adf4350_set(adf4350_tx, freqHz, adf4350_freqStep);
synthesizers::adf4350_set(adf4350_rx, freqHz + lo_freq, adf4350_freqStep);
}
/* Powerdown both devices */
static void adf4350_powerdown(void) {
adf4350_tx.sendPowerDown();
adf4350_rx.sendPowerDown();
}
static void adf4350_powerup(void) {
adf4350_tx.sendPowerUp();
adf4350_rx.sendPowerUp();
}
// automatically set IF frequency depending on rf frequency and board parameters
static void updateIFrequency(freqHz_t txFreqHz) {
#if BOARD_REVISION >= 3
nvic_disable_irq(NVIC_TIM1_UP_IRQ);
if(txFreqHz < 40000) { //|| (txFreqHz > 149000000 && txFreqHz < 151000000)) {
lo_freq = 6000;
adf4350_freqStep = 6000;
vnaMeasurement.setCorrelationTable(sinROM200x1, 200);
vnaMeasurement.adcFullScale = 10000 * 200 * 200;
vnaMeasurement.gainMax = 0;
vnaMeasurement.currThruGain = 0;
} else if(txFreqHz <= 350000) { //|| (txFreqHz > 149000000 && txFreqHz < 151000000)) {
lo_freq = 12000;
adf4350_freqStep = 12000;
vnaMeasurement.setCorrelationTable(sinROM100x1, 100);
vnaMeasurement.adcFullScale = 10000 * 100 * 100;
vnaMeasurement.gainMax = 0;
vnaMeasurement.currThruGain = 0;
} else {
lo_freq = 150000;
adf4350_freqStep = 10000;
vnaMeasurement.setCorrelationTable(sinROM10x2, 20);
vnaMeasurement.adcFullScale = 10000 * 48 * 20;
vnaMeasurement.gainMax = 3;
}
nvic_enable_irq(NVIC_TIM1_UP_IRQ);
#else
// adf4350 freq step and thus IF frequency must be a divisor of the crystal frequency
if(xtalFreqHz == 20000000 || xtalFreqHz == 40000000) {
// 6.25/12.5kHz IF
if(txFreqHz >= 100000) {
lo_freq = 12500;
adf4350_freqStep = 12500;
vnaMeasurement.setCorrelationTable(sinROM24x2, 48);
vnaMeasurement.adcFullScale = 20000 * 48 * 48;
} else {
lo_freq = 6250;
adf4350_freqStep = 6250;
vnaMeasurement.setCorrelationTable(sinROM48x1, 48);
vnaMeasurement.adcFullScale = 20000 * 48 * 48;
}
} else {
// 6.0/12.0kHz IF
if(txFreqHz >= 100000) {
lo_freq = 12000;
adf4350_freqStep = 12000;
vnaMeasurement.setCorrelationTable(sinROM25x2, 50);
vnaMeasurement.adcFullScale = 20000 * 48 * 50;
} else {
lo_freq = 6000;
adf4350_freqStep = 6000;
vnaMeasurement.setCorrelationTable(sinROM50x1, 50);
vnaMeasurement.adcFullScale = 20000 * 48 * 50;
}
}
#endif
}
// needed for correct automatic synthwait setting between board versions
__attribute__((used, noinline)) int calculateSynthWait(bool isSi, int retval) {
if(isSi) return calculateSynthWaitSI(retval);
else return calculateSynthWaitAF(retval);
}
// set the measurement frequency including setting the tx and rx synthesizers
void setFrequency(freqHz_t freqHz) {
updateIFrequency(freqHz);
// On measure, call phase change before update frequency call, so update gain for frequency range here
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(freqHz)));
/* Only if frequency changes apply the new frequency.
* This is to support proper CW mode:
* changing to an existing frequency temporarily breaks the signal */
if(currFreqHz != freqHz) {
currFreqHz = freqHz;
// use adf4350 for f >= 140MHz
if(is_freq_for_adf4350(freqHz)) {
adf4350_update(freqHz);
rfsw(RFSW_TXSYNTH, RFSW_TXSYNTH_HF);
rfsw(RFSW_RXSYNTH, RFSW_RXSYNTH_HF);
#ifdef EXPERIMENTAL_SYNTHWAIT
vnaMeasurement.nWaitSynth = calculateSynthWaitAF(freqHz);
#else
vnaMeasurement.nWaitSynth = calculateSynthWait(false, freqHz);
#endif
} else {
int ret = si5351_update(freqHz);
rfsw(RFSW_TXSYNTH, RFSW_TXSYNTH_LF);
rfsw(RFSW_RXSYNTH, RFSW_RXSYNTH_LF);
if(ret < 0 || ret > 2) ret = 2;
#ifdef EXPERIMENTAL_SYNTHWAIT
vnaMeasurement.nWaitSynth = calculateSynthWaitSI(ret);
#else
vnaMeasurement.nWaitSynth = calculateSynthWait(true, ret);
#endif
}
}
}
void sweepMutateParams(int freqIndex, sys_sweepPoint* outParams) {
sys_sweepPoint& sp = *outParams;
sp.adf4350_txPower = current_props._adf4350_txPower;
}
static void adc_setup() {
static uint8_t channel_array[1] = {adc_rxChannel};
dmaADC.buffer = adcBuffer;
dmaADC.bufferSizeBytes = sizeof(adcBuffer);
dmaADC.init(channel_array, 1);
adc_set_sample_time_on_all_channels(dmaADC.adcDevice, adc_ratecfg);
dmaADC.start();
}
// read and consume data from the adc ring buffer
void adc_read(volatile uint16_t*& data, int& len, int modulus=1) {
static uint32_t lastIndex = 0;
uint32_t cIndex = dmaADC.position();
uint32_t bufWords = dmaADC.bufferSizeBytes / 2;
cIndex &= (bufWords-1);
cIndex = (cIndex / modulus) * modulus;
lastIndex = (lastIndex / modulus) * modulus;
data = ((volatile uint16_t*) dmaADC.buffer) + lastIndex;
if(cIndex >= lastIndex) {
len = cIndex - lastIndex;
} else {
len = bufWords - lastIndex;
}
len = (len/modulus) * modulus;
lastIndex += len;
if(lastIndex >= bufWords) lastIndex = 0;
}
static void lcd_and_ui_setup() {
lcd_spi_init();
digitalWrite(ili9341_cs, HIGH);
digitalWrite(xpt2046_cs, HIGH);
pinMode(ili9341_cs, OUTPUT);
pinMode(xpt2046_cs, OUTPUT);
// setup hooks
ili9341_conf_dc = ili9341_dc;
ili9341_spi_set_cs = [](bool selected) {
lcd_spi_waitDMA();
while(lcdInhibit) ;
// if the xpt2046 is currently selected, deselect it
if(selected && digitalRead(xpt2046_cs) == LOW) {
digitalWrite(xpt2046_cs, HIGH);
}
digitalWrite(ili9341_cs, selected ? LOW : HIGH);
};
ili9341_spi_transfer = [](uint32_t sdi, int bits) {
return lcd_spi_transfer(sdi, bits);
};
ili9341_spi_transfer_bulk = [](uint32_t words) {
while(lcdInhibit) ;
lcd_spi_transfer_bulk((uint8_t*)ili9341_spi_buffer, words*2);
};
ili9341_spi_wait_bulk = []() {
lcd_spi_waitDMA();
};
ili9341_spi_read = [](uint8_t *buf, uint32_t bytes) {
lcd_spi_read_bulk(buf, bytes);
};
xpt2046.spiSetCS = [](bool selected) {
// a single SPI master is used for both the ILI9346 display and the
// touch controller; if an outstanding background DMA is in progress,
// we must wait for it to complete.
lcd_spi_waitDMA();
// if the ili9341 is currently selected, deselect it.
if(selected && digitalRead(ili9341_cs) == LOW) {
digitalWrite(ili9341_cs, HIGH);
}
digitalWrite(xpt2046_cs, selected ? LOW : HIGH);
};
xpt2046.spiTransfer = [](uint32_t sdi, int bits) {
myassert(digitalRead(ili9341_cs) == HIGH);
digitalWrite(ili9341_cs, HIGH);
lcd_spi_slow();
// delayMicroseconds(10);
uint32_t ret = lcd_spi_transfer(sdi, bits);
// delayMicroseconds(10);
lcd_spi_write();
return ret;
};
delay(10);
xpt2046.begin(LCD_WIDTH, LCD_HEIGHT);
ili9341_init();
lcd_spi_write();
// show test pattern
//ili9341_test(5);
// clear screen
ili9341_clear_screen();
// tell the plotting code how to calculate frequency in Hz given an index
plot_getFrequencyAt = [](int index) {
return UIActions::frequencyAt(index);
};
// the plotter will periodically call this function when doing cpu-heavy work;
// use it to process outstanding UI events so that the UI isn't sluggish.
plot_tick = []() {
UIActions::application_doEvents();
};
plot_init();
// redraw all zones next time we draw
redraw_request |= 0xff;
// don't block events
uiEnableProcessing();
// when the UI hardware emits an event, forward it to the UI code
UIHW::emitEvent = [](UIHW::UIEvent evt) {
// process the event on main thread; we are currently in interrupt context.
UIActions::enqueueEvent([evt]() {
ui_process(evt);
});
};
}
static void enterUSBDataMode() {
usbDataMode = true;
}
static void exitUSBDataMode() {
usbDataMode = false;
}
#ifdef BOARD_DISABLE_ECAL
// Made measure ecal, and apply correction
#define ecalApplyReflection(refl, freqIndex) refl
#else
complexf measuredEcal[ECAL_CHANNELS][USB_POINTS_MAX] alignas(8);
static complexf ecalApplyReflection(complexf refl, int freqIndex) {
#if defined(ECAL_PARTIAL)
return refl - measuredEcal[0][freqIndex];
#else
return SOL_compute_reflection(
measuredEcal[1][freqIndex],
1.f,
measuredEcal[0][freqIndex],
refl);
#endif
}
#endif
static complexf applyFixedCorrections(complexf refl, freqHz_t freq) {
// These corrections do not affect calibrated measurements
// and is only there to fix uglyness when uncalibrated and
// without full ecal.
// magnitude correction:
// - Near DC the balun is ineffective and measured refl is
// 0 for short circuit, 0.5 for load, and 1.0 for open circuit,
// requiring a correction of (refl*2 - 1.0).
// - Above 5MHz no correction is needed.
// - Between DC and 5MHz we apply something in between, with
// interpolation factor defined by a polynomial that is
// experimentally determined.
if(freq < 5000000) {
float x = float(freq) * 1e-6 * (3./5.);
x = 1 - x*(0.7 - x*(0.141 - x*0.006));
refl = refl * (1.f + x) - x;
}
// phase correction; experimentally determined polynomial
// x: frequency in MHz
// arg = -0.25 * x * (-1.39 + x*(0.35 - 0.022*x));
if(freq < 7500000) {
float x = float(freq) * 1e-6;
float im = -0.8f * x*(0.45f + x*(-0.12f + x*0.008f));
float re = 1.f;
refl *= complexf(re, im);
}
return refl;
}
static complexf applyFixedCorrectionsThru(complexf thru, freqHz_t freq) {
float scale = 0.5;
if(freq > 1900000000) {
float x = float(freq - 1900000000) / (4400000000 - 1900000000);
scale *= (1 - 0.8*x*(2 - x));
}
return thru * scale;
}
bool serialSendTimeout(const char* s, int len, int timeoutMillis) {
for(int i = 0; i < timeoutMillis; i++) {
if(serial.trySend(s, len))
return true;
delay(1);
}
return false;
}
/*
For a description of the command interface see command_parser.hpp
-- register map:
-- 00: sweepStartHz[7..0]
-- 01: sweepStartHz[15..8]
-- 02: sweepStartHz[23..16]
-- 03: sweepStartHz[31..24]
-- 04: sweepStartHz[39..32]
-- 05: sweepStartHz[47..40]
-- 06: sweepStartHz[55..48]
-- 07: sweepStartHz[63..56]
-- 10: sweepStepHz[7..0]
-- 11: sweepStepHz[15..8]
-- 12: sweepStepHz[23..16]
-- 13: sweepStepHz[31..24]
-- 14: sweepStepHz[39..32]
-- 15: sweepStepHz[47..40]
-- 16: sweepStepHz[55..48]
-- 17: sweepStepHz[63..56]
-- 20: sweepPoints[7..0]
-- 21: sweepPoints[15..8]
-- 22: valuesPerFrequency[7..0]
-- 23: valuesPerFrequency[15..8]
-- 26: dataMode: 0 => VNA data, 1 => raw data, 2 => exit usb data mode
-- 30: valuesFIFO - returns data points; elements are 32-byte. See below for data format.
-- command 0x14 reads FIFO data; writing any value clears FIFO.
-- 40: adf4350 power
-- 41: si5351 power (reserved)
-- 42: average setting
-- f0: device variant (01)
-- f1: protocol version (01)
-- f2: hardware revision
-- f3: firmware major version
-- register descriptions:
-- sweepStartHz - Sweep start frequency in Hz.
-- sweepStepHz - Sweep step frequency in Hz.
-- sweepPoints - Number of points in sweep.
-- valuesFIFO - Only command 0x13 supported; returns VNA data.
-- valuesFIFO element data format:
-- bytes:
-- 00: fwd0Re[7..0]
-- 01: fwd0Re[15..8]
-- 02: fwd0Re[23..16]
-- 03: fwd0Re[31..24]
-- 04: fwd0Im[7..0]
-- 05: fwd0Im[15..8]
-- 06: fwd0Im[23..16]
-- 07: fwd0Im[31..24]
-- 08: rev0Re[7..0]
-- 09: rev0Re[15..8]
-- 0a: rev0Re[23..16]
-- 0b: rev0Re[31..24]
-- 0c: rev0Im[7..0]
-- 0d: rev0Im[15..8]
-- 0e: rev0Im[23..16]
-- 0f: rev0Im[31..24]
-- 10: rev1Re[7..0]
-- 11: rev1Re[15..8]
-- 12: rev1Re[23..16]
-- 13: rev1Re[31..24]
-- 14: rev1Im[7..0]
-- 15: rev1Im[15..8]
-- 16: rev1Im[23..16]
-- 17: rev1Im[31..24]
-- 18: freqIndex[7..0]
-- 19: freqIndex[15..8]
-- 1a - 1f: reserved
*/
static void cmdRegisterWrite(int address);
//1425tX^^^^^^^^^^^^^^XXXXXXXXXXXXXXXXXXXXXXMMMMMM%Vc222$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$44443 \uuuuuuuuuuuuiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiyhz<ggggggggggggggggggggggggggggggggggg
static void cmdReadFIFO(int address, int nValues) {
if(address != 0x30) return;
if(!usbDataMode)
enterUSBDataMode();
// Set count as sweepPoints if 0
if (nValues == 0)
nValues = *(uint16_t*)(registers + 0x20);
for(int i=0; i<nValues;) {
int rdRPos = usbTxQueueRPos;
int rdWPos = usbTxQueueWPos;
__sync_synchronize();
if(rdRPos == rdWPos) { // queue empty
continue;
}
usbDataPoint& usbDP = usbTxQueue[rdRPos];
if(usbDP.freqIndex < 0 || usbDP.freqIndex >= USB_POINTS_MAX)
continue;
/*VNAObservation& value = usbDP.value;
value[0] = ecalApplyReflection(value[0] / value[1], usbDP.freqIndex) * value[1];
int32_t fwdRe = value[1].real();
int32_t fwdIm = value[1].imag();
int32_t reflRe = value[0].real();
int32_t reflIm = value[0].imag();
int32_t thruRe = value[2].real();
int32_t thruIm = value[2].imag();*/
complexf refl = ecalApplyReflection(usbDP.S11, usbDP.freqIndex);
complexf thru = usbDP.S21;
int32_t fwdRe = 1073741824;
int32_t fwdIm = 0;
int32_t reflRe = int32_t(refl.real() * 1073741824.f);
int32_t reflIm = int32_t(refl.imag() * 1073741824.f);
int32_t thruRe = int32_t(thru.real() * 1073741824.f);
int32_t thruIm = int32_t(thru.imag() * 1073741824.f);
uint8_t txbuf[32];
txbuf[0] = uint8_t(fwdRe >> 0);
txbuf[1] = uint8_t(fwdRe >> 8);
txbuf[2] = uint8_t(fwdRe >> 16);
txbuf[3] = uint8_t(fwdRe >> 24);
txbuf[4] = uint8_t(fwdIm >> 0);
txbuf[5] = uint8_t(fwdIm >> 8);
txbuf[6] = uint8_t(fwdIm >> 16);
txbuf[7] = uint8_t(fwdIm >> 24);
txbuf[8] = uint8_t(reflRe >> 0);
txbuf[9] = uint8_t(reflRe >> 8);
txbuf[10] = uint8_t(reflRe >> 16);
txbuf[11] = uint8_t(reflRe >> 24);
txbuf[12] = uint8_t(reflIm >> 0);
txbuf[13] = uint8_t(reflIm >> 8);
txbuf[14] = uint8_t(reflIm >> 16);
txbuf[15] = uint8_t(reflIm >> 24);
txbuf[16] = uint8_t(thruRe >> 0);
txbuf[17] = uint8_t(thruRe >> 8);
txbuf[18] = uint8_t(thruRe >> 16);
txbuf[19] = uint8_t(thruRe >> 24);
txbuf[20] = uint8_t(thruIm >> 0);
txbuf[21] = uint8_t(thruIm >> 8);
txbuf[22] = uint8_t(thruIm >> 16);
txbuf[23] = uint8_t(thruIm >> 24);
txbuf[24] = uint8_t(usbDP.freqIndex >> 0);
txbuf[25] = uint8_t(usbDP.freqIndex >> 8);
txbuf[26] = 0;
txbuf[27] = 0;
txbuf[28] = 0;
txbuf[29] = 0;
txbuf[30] = 0;
txbuf[31] = 0;
uint8_t checksum=0b01000110;
for(int i=0; i<31; i++)
checksum = (checksum xor ((checksum<<1) | 1)) xor txbuf[i];
txbuf[31] = checksum;
if(!serialSendTimeout((char*)txbuf, sizeof(txbuf), 1500)) {
return;
}
__sync_synchronize();
usbTxQueueRPos = (rdRPos + 1) & usbTxQueueMask;
i++;
}
}
// apply usb-configured sweep parameters
static void setVNASweepToUSB() {
int points = *(uint16_t*)(registers + 0x20);
int values = *(uint16_t*)(registers + 0x22);
if(points > USB_POINTS_MAX)
points = USB_POINTS_MAX;
#if BOARD_REVISION < 4
vnaMeasurement.sweepStartHz = (freqHz_t)*(uint64_t*)(registers + 0x00);
vnaMeasurement.sweepStepHz = (freqHz_t)*(uint64_t*)(registers + 0x10);
vnaMeasurement.sweepDataPointsPerFreq = values;
vnaMeasurement.sweepPoints = points;
vnaMeasurement.resetSweep();
if(outputRawSamples) {
setFrequency((freqHz_t)*(uint64_t*)(registers + 0x00));
}
#else
currTimingsArgs.nAverage = 1;
sys_syscall(5, &currTimingsArgs);
setHWSweep(sys_setSweep_args {
(freqHz_t)*(uint64_t*)(registers + 0x00),
(freqHz_t)*(uint64_t*)(registers + 0x10),
points,
values
});
if(outputRawSamples) {
// TODO: syscall: stop sweep
}
#endif
}
static void cmdRegisterWrite(int address) {
if(address == 0xee) {
usbCaptureMode = true;
#pragma pack(push, 1)
constexpr struct {
uint16_t width;
uint16_t height;
uint8_t pixelFormat;
} meta = { LCD_WIDTH, LCD_HEIGHT, 16 };
#pragma pack(pop)
serial.print((char*) &meta, sizeof(meta));
// use uint16_t ili9341_spi_buffers for read buffer
static_assert(meta.width * 2 <= sizeof(ili9341_spi_buffers));
for (int y=0; y < meta.height; y+=1){
ili9341_read_memory(0, y, meta.width, 1, ili9341_spi_buffers);
serial.print((char*) ili9341_spi_buffers, meta.width * 2 * 1);
}
usbCaptureMode = false;
return;
}
if (address == 0x40) {UIActions::set_averaging(registers[0x40]); return;}
if (address == 0x42) {UIActions::set_adf4350_txPower(registers[0x42]); return;}
if(!usbDataMode)
enterUSBDataMode();
if(address == 0x00 || address == 0x10 || address == 0x20 || address == 0x22) {
setVNASweepToUSB();
}
if(address == 0x26) {
auto val = registers[0x26];
if(val == 0) {
outputRawSamples = false;
} else if(val == 1) {
outputRawSamples = true;
} else if(val == 2) {
outputRawSamples = false;
exitUSBDataMode();
}
}
if(address == 0x00 || address == 0x10 || address == 0x20) {
ecalState = ECAL_STATE_MEASURING;
vnaMeasurement.ecalIntervalPoints = 1;
}
if(address == 0x30) {
usbTxQueueRPos = usbTxQueueWPos;
}
}
static void cmdInit() {
cmdParser.handleReadFIFO = [](int address, int nValues) {
return cmdReadFIFO(address, nValues);
};
cmdParser.handleWriteFIFO = [](int address, int totalBytes, int nBytes, const uint8_t* data) {};
cmdParser.handleWrite = [](int address) {
return cmdRegisterWrite(address);
};
cmdParser.send = [](const uint8_t* s, int len) {
serialSendTimeout((char*) s, len, 1500);
};
cmdParser.registers = registers;
cmdParser.registersSizeMask = registersSizeMask;
cmdInputFIFO.buffer = cmdInputBuffer;
cmdInputFIFO.bufferSize = sizeof(cmdInputBuffer);
cmdInputFIFO.output = [](const uint8_t* s, int len) {
cmdParser.handleInput(s, len);
};
}
static int measurementGetDefaultGain(freqHz_t freqHz) {
if(freqHz > 2500000000)
return 2;
else if(freqHz > FREQUENCY_CHANGE_OVER)
return 1;
else
return 0;
}
// callback called by VNAMeasurement to change rf switch positions.
static void measurementPhaseChanged(VNAMeasurementPhases ph) {
lcdInhibit = false;
switch(ph) {
case VNAMeasurementPhases::REFERENCE:
rfsw(RFSW_REFL, RFSW_REFL_ON);
rfsw(RFSW_RECV, RFSW_RECV_REFL);
rfsw(RFSW_ECAL, RFSW_ECAL_OPEN);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(currFreqHz)));
break;
case VNAMeasurementPhases::REFL:
// If only measuring REFL and THRU, we skip REFERENCE and thus
// the rfsw are not setup correct, so fix it here
if (vnaMeasurement.measurement_mode == MEASURE_MODE_REFL_THRU) {
rfsw(RFSW_REFL, RFSW_REFL_ON);
rfsw(RFSW_RECV, RFSW_RECV_REFL);
}
rfsw(RFSW_ECAL, RFSW_ECAL_NORMAL);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(currFreqHz)));
break;
case VNAMeasurementPhases::THRU:
rfsw(RFSW_ECAL, RFSW_ECAL_NORMAL);
rfsw(RFSW_REFL, RFSW_REFL_OFF);
rfsw(RFSW_RECV, RFSW_RECV_PORT2);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(vnaMeasurement.currThruGain));
lcdInhibit = true;
break;
case VNAMeasurementPhases::ECALTHRU:
rfsw(RFSW_ECAL, RFSW_ECAL_LOAD);
rfsw(RFSW_RECV, RFSW_RECV_REFL);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(currFreqHz)));
lcdInhibit = true;
break;
case VNAMeasurementPhases::ECALLOAD:
rfsw(RFSW_REFL, RFSW_REFL_ON);
rfsw(RFSW_RECV, RFSW_RECV_REFL);
rfsw(RFSW_ECAL, RFSW_ECAL_LOAD);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(currFreqHz)));
break;
case VNAMeasurementPhases::ECALSHORT:
rfsw(RFSW_ECAL, RFSW_ECAL_SHORT);
rfsw(RFSW_BBGAIN, RFSW_BBGAIN_GAIN(measurementGetDefaultGain(currFreqHz)));
break;
}
}
// Allow smooth complex data point array (this remove noise, smooth power depend form count)
static void measurementDataSmooth(complexf *data, int points, int count){
int j;
while(count--){
complexf prev = data[0];
// first point smooth
data[0] = (prev + prev + data[1])/3.0f;
for (j=1;j<points-1;j++){
complexf old = data[j]; // save current data point for next point smooth
data[j] = (prev + data[j] + data[j] + data[j+1])/4.0f;
prev = old;
}
// last point smooth
data[j] = (data[j] + data[j] + prev)/3.0f;
}
}
int currDPCnt = 0;
int lastFreqIndex = -1;
VNAObservation currDP;
#define USE_FIXED_CORRECTION
// callback called by VNAMeasurement when an observation is available.
static void measurementEmitDataPoint(int freqIndex, freqHz_t freqHz, VNAObservation v, const complexf* ecal, bool clipped) {
digitalWrite(led, clipped?1:0);