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Re-enabled weak signal bandwidth reduction

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This commit is contained in:
OneOfEleven 2023-09-24 13:00:02 +01:00
parent 4ea37929f7
commit 2486501332
13 changed files with 906 additions and 23 deletions
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63
am_fix.c
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@ -92,14 +92,20 @@ const uint8_t orig_pga = 6; // -3dB
// 1 = -27dB
// 0 = -33dB
// front end register dB values - needs a measuring/calibration update really
// front end register dB values
//
// these values need to be accurate for the code to properly/reliably switch
// between table entries when adjusting the front end registers.
//
// these 4 tables need a measuring/calibration update
//
// static const int16_t lna_short_dB[] = {-19, -16, -11, 0}; // was
static const int16_t lna_short_dB[] = {-33, -30 -24, 0}; // corrected'ish
static const int16_t lna_dB[] = {-24, -19, -14, -9, -6, -4, -2, 0};
static const int16_t mixer_dB[] = { -8, -6, -3, 0};
static const int16_t pga_dB[] = {-33, -27, -21, -15, -9, -6, -3, 0};
// lookup table is by far easier than writing code to do the same
// lookup table is hugely easier than writing code to do the same
//
static const t_am_fix_gain_table am_fix_gain_table[] =
{
@ -115,7 +121,7 @@ const uint8_t orig_pga = 6; // -3dB
{2, 2, 3, 6}, // 3 .. -24dB -14dB 0dB -3dB .. -41dB
{3, 2, 3, 6} // 4 .. 0dB -14dB 0dB -3dB .. -17dB
};
const unsigned int original_index = 1;
#elif 0
@ -288,6 +294,8 @@ const uint8_t orig_pga = 6; // -3dB
#else
unsigned int am_fix_gain_table_index = original_index; // start with original QS setting
#endif
// used to simply detect we've changed our table index/register settings
unsigned int am_fix_gain_table_index_prev = 0;
// moving average RSSI buffer
@ -299,14 +307,15 @@ const uint8_t orig_pga = 6; // -3dB
uint16_t sum; // sum of all samples in the buffer
} moving_avg_rssi = {0};
// used to prevent gain hunting, provides a peak hold time delay
// to help reduce gain hunting, provides a peak hold time delay
unsigned int am_gain_hold_counter = 0;
// used to correct the RSSI readings after our front end gain adjustments
int16_t rssi_db_gain_diff = 0;
void AM_fix_reset(void)
{
{ // reset the AM fixer
// reset the moving average filter
memset(&moving_avg_rssi, 0, sizeof(moving_avg_rssi));
@ -319,9 +328,17 @@ const uint8_t orig_pga = 6; // -3dB
#else
am_fix_gain_table_index = original_index; // re-start with original QS setting
#endif
am_fix_gain_table_index_prev = 0;
}
// adjust the RX RF gain to try and prevent the AM demodulator from
// saturating/overloading/clipping (distorted AM audio)
//
// we're actually doing the BK4819's job for it here, but as the chip
// won't/don't do it for itself, we're left to bodging it ourself by
// playing with the RF front end gain settings
//
void AM_fix_adjust_frontEnd_10ms(void)
{
#ifndef ENABLE_AM_FIX_TEST1
@ -329,12 +346,13 @@ const uint8_t orig_pga = 6; // -3dB
const uint16_t desired_rssi = (-89 + 160) * 2; // dBm to ADC sample
#endif
// we don't play with the front end gains if in FM mode
// they remain as per QS original
// we don't need to play with the front end gains if we're in FM mode, they
// remain as per QS original
//
if (!gRxVfo->IsAM)
return;
// we're in AM mode
// but we're not in FM mode, we're in AM mode
switch (gCurrentFunction)
{
@ -344,7 +362,7 @@ const uint8_t orig_pga = 6; // -3dB
case FUNCTION_FOREGROUND:
return;
// only adjust the front end if in one of these modes
// only adjust stuff if we're in one of these modes
case FUNCTION_RECEIVE:
case FUNCTION_MONITOR:
case FUNCTION_INCOMING:
@ -352,10 +370,11 @@ const uint8_t orig_pga = 6; // -3dB
}
// sample the current RSSI level
uint16_t rssi = BK4819_GetRSSI(); // supposed 9-bit value (0 .. 511) - never seen that though
uint16_t rssi = BK4819_GetRSSI(); // supposed 9-bit value (0 .. 511) - never seen that though
#if 1
// compute a moving average RSSI - just smooths any sharp spikes
// compute moving average RSSI - helps smooth any sharp spikes/troughs
// but can cause gain hunting/oscillation if too long a buffer (.samples)
if (moving_avg_rssi.count < ARRAY_SIZE(moving_avg_rssi.samples))
moving_avg_rssi.count++;
moving_avg_rssi.sum -= moving_avg_rssi.samples[moving_avg_rssi.index]; // subtract the oldest sample
@ -370,42 +389,42 @@ const uint8_t orig_pga = 6; // -3dB
#ifdef ENABLE_AM_FIX_TEST1
// user is manually adjusting a gain register - don't do anything automatically
am_fix_gain_table_index = 1 + gSetting_AM_fix_test1;
if (am_gain_hold_counter > 0)
if (--am_gain_hold_counter > 0)
return;
am_gain_hold_counter = 250; // 250ms
am_gain_hold_counter = 250; // 250ms hold
#else
// automatically choose a front end gain setting by monitoring the RSSI
if (rssi > desired_rssi)
{ // decrease gain
if (am_fix_gain_table_index > 1)
am_fix_gain_table_index--;
am_gain_hold_counter = 50; // 500ms
am_gain_hold_counter = 50; // 500ms hold
}
if (am_gain_hold_counter > 0)
am_gain_hold_counter--;
if (am_gain_hold_counter == 0)
{ // hold has been released, we're now free to increase gain
// hold has been released, we're free to increase gain
if (rssi < (desired_rssi - 10)) // 5dB hysterisis (helps reduce gain hunting)
{ // increase gain
// increase gain
if (am_fix_gain_table_index < (ARRAY_SIZE(am_fix_gain_table) - 1))
am_fix_gain_table_index++;
}
}
if (am_fix_gain_table_index == am_fix_gain_table_index_prev)
return; // no gain changes have been made
#endif
// apply the new settings to the front end registers
@ -423,6 +442,7 @@ const uint8_t orig_pga = 6; // -3dB
// gain difference from original QS setting
rssi_db_gain_diff = am_dB_gain - orig_dB_gain;
// shall we or sharn't we ?
//gCurrentRSSI[gEeprom.RX_CHANNEL] = rssi - (rssi_db_gain_diff * 2);
}
@ -430,6 +450,7 @@ const uint8_t orig_pga = 6; // -3dB
am_fix_gain_table_index_prev = am_fix_gain_table_index;
#ifdef ENABLE_AM_FIX_SHOW_DATA
// trigger display update so the user can see the data as it changes
gUpdateDisplay = true;
#endif
}

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firmware.bin Normal file
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firmware.packed.bin Normal file
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6
radio.c
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@ -595,7 +595,8 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
case BK4819_FILTER_BW_WIDE:
case BK4819_FILTER_BW_NARROW:
#ifdef ENABLE_AM_FIX
BK4819_SetFilterBandwidth(Bandwidth, gRxVfo->IsAM && gSetting_AM_fix);
// BK4819_SetFilterBandwidth(Bandwidth, gRxVfo->IsAM && gSetting_AM_fix);
BK4819_SetFilterBandwidth(Bandwidth, false);
#else
BK4819_SetFilterBandwidth(Bandwidth, false);
#endif
@ -843,7 +844,8 @@ void RADIO_SetTxParameters(void)
case BK4819_FILTER_BW_WIDE:
case BK4819_FILTER_BW_NARROW:
#ifdef ENABLE_AM_FIX
BK4819_SetFilterBandwidth(Bandwidth, gCurrentVfo->IsAM && gSetting_AM_fix);
// BK4819_SetFilterBandwidth(Bandwidth, gCurrentVfo->IsAM && gSetting_AM_fix);
BK4819_SetFilterBandwidth(Bandwidth, false);
#else
BK4819_SetFilterBandwidth(Bandwidth, false);
#endif

17
utils/clean.bat Normal file
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@ -0,0 +1,17 @@
@echo off
del /S /Q *.~*
del /S /Q *.map
del /S /Q *.tds
del /S /Q *.obj
del /S /Q *.db
del /S /Q *.ilc
del /S /Q *.ild
del /S /Q *.ilf
del /S /Q *.ils
del /S /Q *.dcu
::del /S /Q *.dsk
rd /S /Q Debug
rd /S /Q Release
rd /S /Q ipch
::pause
@echo on

98
utils/gain_table.c Normal file
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@ -0,0 +1,98 @@
const t_am_fix_gain_table am_fix_gain_table[] =
{
{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6}, // 0 0dB -14dB 0dB -3dB .. -17dB original
{0, 0, 0, 0}, // 1 .. -33dB -24dB -8dB -33dB .. -98dB
{0, 0, 1, 0}, // 2 .. -33dB -24dB -6dB -33dB .. -96dB
{1, 0, 0, 0}, // 3 .. -30dB -24dB -8dB -33dB .. -95dB
{0, 1, 0, 0}, // 4 .. -33dB -19dB -8dB -33dB .. -93dB
{0, 0, 0, 1}, // 5 .. -33dB -24dB -8dB -27dB .. -92dB
{0, 1, 1, 0}, // 6 .. -33dB -19dB -6dB -33dB .. -91dB
{0, 0, 1, 1}, // 7 .. -33dB -24dB -6dB -27dB .. -90dB
{1, 0, 0, 1}, // 8 .. -30dB -24dB -8dB -27dB .. -89dB
{0, 1, 2, 0}, // 9 .. -33dB -19dB -3dB -33dB .. -88dB
{1, 0, 3, 0}, // 10 .. -30dB -24dB 0dB -33dB .. -87dB
{0, 0, 0, 2}, // 11 .. -33dB -24dB -8dB -21dB .. -86dB
{1, 1, 2, 0}, // 12 .. -30dB -19dB -3dB -33dB .. -85dB
{0, 0, 3, 1}, // 13 .. -33dB -24dB 0dB -27dB .. -84dB
{0, 3, 0, 0}, // 14 .. -33dB -9dB -8dB -33dB .. -83dB
{1, 1, 3, 0}, // 15 .. -30dB -19dB 0dB -33dB .. -82dB
{1, 0, 3, 1}, // 16 .. -30dB -24dB 0dB -27dB .. -81dB
{0, 2, 3, 0}, // 17 .. -33dB -14dB 0dB -33dB .. -80dB
{1, 2, 0, 1}, // 18 .. -30dB -14dB -8dB -27dB .. -79dB
{0, 3, 2, 0}, // 19 .. -33dB -9dB -3dB -33dB .. -78dB
{1, 4, 0, 0}, // 20 .. -30dB -6dB -8dB -33dB .. -77dB
{0, 2, 0, 2}, // 21 .. -33dB -14dB -8dB -21dB .. -76dB
{0, 3, 3, 0}, // 22 .. -33dB -9dB 0dB -33dB .. -75dB
{1, 3, 0, 1}, // 23 .. -30dB -9dB -8dB -27dB .. -74dB
{1, 2, 0, 2}, // 24 .. -30dB -14dB -8dB -21dB .. -73dB
{1, 1, 0, 3}, // 25 .. -30dB -19dB -8dB -15dB .. -72dB
{1, 4, 0, 1}, // 26 .. -30dB -6dB -8dB -27dB .. -71dB
{1, 5, 2, 0}, // 27 .. -30dB -4dB -3dB -33dB .. -70dB
{1, 4, 1, 1}, // 28 .. -30dB -6dB -6dB -27dB .. -69dB
{2, 2, 2, 1}, // 29 .. -24dB -14dB -3dB -27dB .. -68dB
{2, 1, 2, 2}, // 30 .. -24dB -19dB -3dB -21dB .. -67dB
{2, 0, 2, 3}, // 31 .. -24dB -24dB -3dB -15dB .. -66dB
{1, 0, 0, 6}, // 32 .. -30dB -24dB -8dB -3dB .. -65dB
{2, 1, 1, 3}, // 33 .. -24dB -19dB -6dB -15dB .. -64dB
{0, 3, 1, 3}, // 34 .. -33dB -9dB -6dB -15dB .. -63dB
{2, 3, 0, 2}, // 35 .. -24dB -9dB -8dB -21dB .. -62dB
{2, 1, 2, 3}, // 36 .. -24dB -19dB -3dB -15dB .. -61dB
{2, 3, 1, 2}, // 37 .. -24dB -9dB -6dB -21dB .. -60dB
{2, 2, 3, 2}, // 38 .. -24dB -14dB 0dB -21dB .. -59dB
{2, 1, 1, 4}, // 39 .. -24dB -19dB -6dB -9dB .. -58dB
{2, 4, 1, 2}, // 40 .. -24dB -6dB -6dB -21dB .. -57dB
{1, 2, 2, 4}, // 41 .. -30dB -14dB -3dB -9dB .. -56dB
{2, 1, 1, 5}, // 42 .. -24dB -19dB -6dB -6dB .. -55dB
{2, 3, 3, 2}, // 43 .. -24dB -9dB 0dB -21dB .. -54dB
{1, 3, 0, 5}, // 44 .. -30dB -9dB -8dB -6dB .. -53dB
{1, 5, 2, 3}, // 45 .. -30dB -4dB -3dB -15dB .. -52dB
{1, 3, 1, 5}, // 46 .. -30dB -9dB -6dB -6dB .. -51dB
{0, 2, 2, 7}, // 47 .. -33dB -14dB -3dB 0dB .. -50dB
{2, 1, 1, 7}, // 48 .. -24dB -19dB -6dB 0dB .. -49dB
{0, 4, 2, 5}, // 49 .. -33dB -6dB -3dB -6dB .. -48dB
{1, 2, 3, 6}, // 50 .. -30dB -14dB 0dB -3dB .. -47dB
{1, 5, 1, 5}, // 51 .. -30dB -4dB -6dB -6dB .. -46dB
{3, 0, 3, 2}, // 52 .. 0dB -24dB 0dB -21dB .. -45dB
{3, 2, 2, 1}, // 53 .. 0dB -14dB -3dB -27dB .. -44dB
{2, 5, 1, 4}, // 54 .. -24dB -4dB -6dB -9dB .. -43dB
{1, 4, 2, 6}, // 55 .. -30dB -6dB -3dB -3dB .. -42dB
{3, 0, 0, 4}, // 56 .. 0dB -24dB -8dB -9dB .. -41dB
{0, 5, 3, 6}, // 57 .. -33dB -4dB 0dB -3dB .. -40dB
{2, 4, 2, 5}, // 58 .. -24dB -6dB -3dB -6dB .. -39dB
{3, 0, 0, 5}, // 59 .. 0dB -24dB -8dB -6dB .. -38dB
{0, 5, 3, 7}, // 60 .. -33dB -4dB 0dB 0dB .. -37dB
{2, 3, 3, 6}, // 61 .. -24dB -9dB 0dB -3dB .. -36dB
{3, 4, 0, 2}, // 62 .. 0dB -6dB -8dB -21dB .. -35dB
{3, 1, 1, 4}, // 63 .. 0dB -19dB -6dB -9dB .. -34dB
{3, 0, 3, 4}, // 64 .. 0dB -24dB 0dB -9dB .. -33dB
{3, 3, 0, 3}, // 65 .. 0dB -9dB -8dB -15dB .. -32dB
{3, 1, 1, 5}, // 66 .. 0dB -19dB -6dB -6dB .. -31dB
{3, 0, 2, 6}, // 67 .. 0dB -24dB -3dB -3dB .. -30dB
{3, 2, 3, 3}, // 68 .. 0dB -14dB 0dB -15dB .. -29dB
{3, 2, 0, 5}, // 69 .. 0dB -14dB -8dB -6dB .. -28dB
{3, 4, 1, 3}, // 70 .. 0dB -6dB -6dB -15dB .. -27dB
{3, 2, 2, 4}, // 71 .. 0dB -14dB -3dB -9dB .. -26dB
{3, 1, 2, 6}, // 72 .. 0dB -19dB -3dB -3dB .. -25dB
{3, 3, 1, 4}, // 73 .. 0dB -9dB -6dB -9dB .. -24dB
{3, 2, 1, 6}, // 74 .. 0dB -14dB -6dB -3dB .. -23dB
{3, 5, 2, 3}, // 75 .. 0dB -4dB -3dB -15dB .. -22dB
{3, 4, 1, 4}, // 76 .. 0dB -6dB -6dB -9dB .. -21dB
{3, 4, 0, 5}, // 77 .. 0dB -6dB -8dB -6dB .. -20dB
{3, 5, 1, 4}, // 78 .. 0dB -4dB -6dB -9dB .. -19dB
{3, 3, 3, 4}, // 79 .. 0dB -9dB 0dB -9dB .. -18dB
{3, 2, 3, 6}, // 80 .. 0dB -14dB 0dB -3dB .. -17dB original
{3, 5, 1, 5}, // 81 .. 0dB -4dB -6dB -6dB .. -16dB
{3, 3, 1, 7}, // 82 .. 0dB -9dB -6dB 0dB .. -15dB
{3, 2, 3, 7}, // 83 .. 0dB -14dB 0dB 0dB .. -14dB
{3, 5, 1, 6}, // 84 .. 0dB -4dB -6dB -3dB .. -13dB
{3, 4, 2, 6}, // 85 .. 0dB -6dB -3dB -3dB .. -12dB
{3, 5, 2, 6}, // 86 .. 0dB -4dB -3dB -3dB .. -10dB
{3, 4, 3, 6}, // 87 .. 0dB -6dB 0dB -3dB .. -9dB
{3, 5, 2, 7}, // 88 .. 0dB -4dB -3dB 0dB .. -7dB
{3, 4, 3, 7}, // 89 .. 0dB -6dB 0dB 0dB .. -6dB
{3, 5, 3, 7}, // 90 .. 0dB -4dB 0dB 0dB .. -4dB
};
const unsigned int original_index = 80;

366
utils/main.cpp Normal file
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@ -0,0 +1,366 @@
#include <vcl.h>
#include <stdint.h>
#include <stdio.h>
#include <vector>
#pragma hdrstop
// ************************************************************************
// create a front end gain table for the firmware
// <9:8> = LNA Gain Short
// 3 = 0dB < original value
// 2 = -11dB
// 1 = -16dB
// 0 = -19dB
//
// <7:5> = LNA Gain
// 7 = 0dB
// 6 = -2dB
// 5 = -4dB
// 4 = -6dB
// 3 = -9dB
// 2 = -14dB < original value
// 1 = -19dB
// 0 = -24dB
//
// <4:3> = MIXER Gain
// 3 = 0dB < original value
// 2 = -3dB
// 1 = -6dB
// 0 = -8dB
//
// <2:0> = PGA Gain
// 7 = 0dB
// 6 = -3dB < original value
// 5 = -6dB
// 4 = -9dB
// 3 = -15dB
// 2 = -21dB
// 1 = -27dB
// 0 = -33dB
typedef struct
{
uint8_t lna_short;
uint8_t lna;
uint8_t mixer;
uint8_t pga;
int16_t lna_short_dB;
int16_t lna_dB;
int16_t mixer_dB;
int16_t pga_dB;
int16_t sum_dB;
} t_gain_table;
void __fastcall create_gain_table(String filename)
{
String s;
std::vector <t_gain_table> gain_table;
// front end register dB values
// const int16_t lna_short_dB[4] = { (-19), (-16), (-11), (0)}; // was
const int16_t lna_short_dB[4] = { (-33), (-30), (-24), (0)}; // corrected
const int16_t lna_dB[8] = { (-24), (-19), (-14), (-9), (-6), (-4), (-2), (0)};
const int16_t mixer_dB[4] = { (-8), (-6), (-3), (0)};
const int16_t pga_dB[8] = { (-33), (-27), (-21), (-15), (-9), (-6), (-3), (0)};
const uint8_t orig_lna_short = 3;
const uint8_t orig_lna = 2;
const uint8_t orig_mixer = 3;
const uint8_t orig_pga = 6;
const int16_t orig_gain_dB =
lna_short_dB[orig_lna_short] +
lna_dB[orig_lna] +
mixer_dB[orig_mixer] +
pga_dB[orig_pga];
const uint8_t lna_short_min = 0; // 0
const uint8_t lna_min = 0; // 0
const uint8_t mixer_min = 0; // 0
const uint8_t pga_min = 0; // 0
const uint8_t lna_short_max = 3; // 3
const uint8_t lna_max = 5; // 5
const uint8_t mixer_max = 3; // 3
const uint8_t pga_max = 7; // 7
uint8_t lna_short = lna_short_min;
uint8_t lna = lna_min;
uint8_t mixer = mixer_min;
uint8_t pga = pga_min;
unsigned int original_index = 0;
while (true)
{
t_gain_table entry;
entry.lna_short = lna_short;
entry.lna = lna;
entry.mixer = mixer;
entry.pga = pga;
entry.lna_short_dB = lna_short_dB[lna_short];
entry.lna_dB = lna_dB[lna];
entry.mixer_dB = mixer_dB[mixer];
entry.pga_dB = pga_dB[pga];
entry.sum_dB = lna_short_dB[lna_short] +
lna_dB[lna] +
mixer_dB[mixer] +
pga_dB[pga];
if (entry.sum_dB != orig_gain_dB)
gain_table.push_back(entry);
else
if (lna_short == orig_lna_short && lna == orig_lna && mixer == orig_mixer && pga == orig_pga)
gain_table.push_back(entry);
if (++pga <= pga_max)
continue;
pga = pga_min;
if (++mixer <= mixer_max)
continue;
mixer = mixer_min;
if (++lna <= lna_max)
continue;
lna = lna_min;
if (++lna_short <= lna_short_max)
continue;
// lna_short = lna_short_min;
break;
}
// sort the table according top the sum dB
for (unsigned int i = 0; i < gain_table.size() - 1; i++)
{
t_gain_table entry1 = gain_table[i];
for (unsigned int k = i + 1; k < gain_table.size(); k++)
{
t_gain_table entry2 = gain_table[k];
if (entry2.sum_dB < entry1.sum_dB)
{ // swap
const t_gain_table entry = entry1;
entry1 = entry2;
entry2 = entry;
gain_table[i] = entry1;
gain_table[k] = entry2;
}
}
}
{ // remove sum_dB duplicates
unsigned int i = 0;
while (i < gain_table.size())
{
const t_gain_table entry1 = gain_table[i++];
if (entry1.lna_short == orig_lna_short &&
entry1.lna == orig_lna &&
entry1.mixer == orig_mixer &&
entry1.pga == orig_pga)
continue; // leave the original inplace
while (i < gain_table.size())
{
const t_gain_table entry2 = gain_table[i];
if (entry2.lna_short == orig_lna_short &&
entry2.lna == orig_lna &&
entry2.mixer == orig_mixer &&
entry2.pga == orig_pga)
break; // leave the original inplace
if (entry2.sum_dB != entry1.sum_dB)
break;
gain_table.erase(gain_table.begin() + i, gain_table.begin() + i + 1);
}
}
}
// find the QS original index
for (int i = (int)gain_table.size() - 1; i >= 0; i--)
{
const t_gain_table entry = gain_table[i];
if (entry.sum_dB != orig_gain_dB)
continue;
if (entry.lna_short != orig_lna_short ||
entry.lna != orig_lna ||
entry.mixer != orig_mixer ||
entry.pga != orig_pga)
continue;
original_index = i;
break;
}
const int save_handle = FileCreate(filename);
if (save_handle <= 0)
return;
s = "\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
s = "\tconst t_am_fix_gain_table am_fix_gain_table[] =\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
s = "\t{\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
s = "\t\t{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6}, // 0 0dB -14dB 0dB -3dB .. -17dB original\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
s = "\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
for (unsigned int i = 0; i < gain_table.size(); i++)
{
const t_gain_table entry = gain_table[i];
// {0, 0, 0, 0}, // 00 -19dB -24dB -8dB -33dB .. -84dB
s.printf("\t\t{%u, %u, %u, %u}, // %3u .. %3ddB %3ddB %2ddB %3ddB .. %3ddB",
entry.lna_short,
entry.lna,
entry.mixer,
entry.pga,
1 + i,
entry.lna_short_dB,
entry.lna_dB,
entry.mixer_dB,
entry.pga_dB,
entry.sum_dB);
if (i == original_index)
s += " original";
s += "\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
}
s = "\t};\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
s.printf("\r\n\tconst unsigned int original_index = %u;\r\n", 1 + original_index);
FileWrite(save_handle, s.c_str(), s.Length());
FileClose(save_handle);
}
// ************************************************************************
// "rotate_font()" has nothing to do with this program at all, I just needed
// to write a bit of code to rotate some fonts I've drawn
void __fastcall rotate_font(String filename1, String filename2)
{
std::vector <uint8_t> data;
// ****************************
// load the file
const int load_handle = FileOpen(filename1, fmOpenRead | fmShareDenyNone);
if (load_handle <= 0)
return;
const int file_size = FileSeek(load_handle, 0, 2);
FileSeek(load_handle, 0, 0);
if (file_size <= 0)
{
FileClose(load_handle);
return;
}
data.resize(file_size);
const int bytes_loaded = FileRead(load_handle, &data[0], file_size);
FileClose(load_handle);
if (bytes_loaded != (int)data.size())
return;
// ***************************
// rotate the font 90-deg clockwise
for (unsigned int i = 0; i <= (data.size() - 8); i += 8)
{
uint8_t c1[8];
uint8_t c2[8];
memcpy(c1, &data[i], 8);
memset(c2, 0, 8);
for (unsigned int k = 0; k < 8; k++)
{
uint8_t b = c1[k];
for (unsigned int m = 0; m < 8; m++)
{
if (b & 0x80)
c2[m] |= 1u << k;
b <<= 1;
}
}
memcpy(&data[i], c2, 8);
}
// ***************************
// save file
String s;
const int save_handle = FileCreate(filename2);
if (save_handle <= 0)
return;
s.printf("const uint8_t gFontSmall[95][7] =\r\n");
FileWrite(save_handle, s.c_str(), s.Length());
s = "{\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
for (unsigned int i = 0; i < data.size(); )
{
s = "";
// for (unsigned int k = 0; k < 8 && i < data.size(); k++)
for (unsigned int k = 0; k < 7 && i < data.size(); k++)
{
String s2;
s2.printf("0x%02X", data[i++]);
if (k == 0)
s += "\t{";
// if (k < 7)
if (k < 6)
s += s2 + ", ";
else
s += s2 + "},\r\n";
}
i++;
FileWrite(save_handle, s.c_str(), s.Length());
}
s = "};\r\n";
FileWrite(save_handle, s.c_str(), s.Length());
FileClose(save_handle);
// ***************************
}
#pragma argsused
int main(int argc, char* argv[])
{
create_gain_table("gain_table.c");
// rotate_font("uv-k5_small.bin", "uv-k5_small.c");
// rotate_font("uv-k5_small_bold.bin", "uv-k5_small_bold.c");
return 0;
}

3
utils/misc.bpf Normal file
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This file is used by the project manager only and should be treated like the project file
main

119
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<WARNINGS value="-w-par"/>
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[Version Info]
IncludeVerInfo=1
AutoIncBuild=0
MajorVer=0
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DLL=0
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[Excluded Packages]
c:\program files (x86)\borland\cbuilder6\Bin\dclite60.bpl=Borland Integrated Translation Environment
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DebugSourceDirs=$(BCB)\source\vcl
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RunParams=
Launcher=
UseLauncher=0
DebugCWD=
HostApplication=
RemoteHost=
RemotePath=
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AddServerUnit=1
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utils/misc.dsk Normal file
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utils/uv-k5_small.fon Normal file
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utils/uv-k5_small_bold.fon Normal file
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