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si5351.c
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si5351.c
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/*
* Copyright (c) 2019-2020, Dmitry (DiSlord) dislordlive@gmail.com
* Based on TAKAHASHI Tomohiro (TTRFTECH) edy555@gmail.com
* All rights reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* The software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "hal.h"
#include "nanovna.h"
#include "si5351.h"
// audio codec frequency clock
#define CLK2_FREQUENCY AUDIO_CLOCK_REF
// Fixed PLL mode multiplier (used in band 1 for frequency 800-10k)
#define PLL_N_1 8
// Fixed PLL mode multiplier (used in band 2 for frequency 10k-100M)
#define PLL_N_2 32
// I2C address on bus (only 0x60 for Si5351A in 10-Pin MSOP)
#define SI5351_I2C_ADDR 0x60
static uint8_t current_band = 0;
static uint8_t current_power = 0;
static uint32_t current_freq = 0;
// Use cache for this reg, not update if not change
static uint8_t clk_cache[3] = {0, 0, 0};
static void si5351_reset_cache(void){
current_band = 0;
current_freq = 0;
}
#ifdef ENABLE_SI5351_TIMINGS
// For debug
uint16_t timings[8]={
DELAY_BAND_1_2, // 0
DELAY_BAND_3_4, // 1
DELAY_BANDCHANGE, // 2
DELAY_CHANNEL_CHANGE, // 3
DELAY_SWEEP_START, // 4
DELAY_RESET_PLL_BEFORE, // 5
DELAY_RESET_PLL_AFTER, // 6
};
inline void si5351_set_timing(int i, int v) {timings[i]=US2ST(v);}
#undef DELAY_BAND_1_2
#undef DELAY_BAND_3_4
#undef DELAY_BANDCHANGE
#undef DELAY_RESET_PLL_BEFORE
#undef DELAY_RESET_PLL_AFTER
#undef DELAY_CHANNEL_CHANGE
#undef DELAY_SWEEP_START
#define DELAY_BAND_1_2 timings[0]
#define DELAY_BAND_3_4 timings[1]
#define DELAY_BANDCHANGE timings[2]
#define DELAY_CHANNEL_CHANGE timings[3]
#define DELAY_SWEEP_START timings[4]
#define DELAY_RESET_PLL_BEFORE timings[5]
#define DELAY_RESET_PLL_AFTER timings[6]
#endif
uint32_t si5351_get_frequency(void)
{
return current_freq;
}
#ifdef USE_VARIABLE_OFFSET
void si5351_set_frequency_offset(int32_t offset)
{
si5351_reset_cache();
generate_DSP_Table(offset);
IF_OFFSET = offset;
}
#endif
void si5351_set_power(uint8_t drive_strength){
if (drive_strength == current_power) return;
si5351_set_frequency(current_freq, drive_strength);
}
void si5351_bulk_write(const uint8_t *buf, int len)
{
i2c_transfer(SI5351_I2C_ADDR, buf, len);
}
#if 0
static bool si5351_bulk_read(uint8_t reg, uint8_t* buf, int len)
{
i2cAcquireBus(&I2CD1);
msg_t mr = i2cMasterTransmitTimeout(&I2CD1, SI5351_I2C_ADDR, ®, 1, buf, len, 1000);
i2cReleaseBus(&I2CD1);
return mr == MSG_OK;
}
static void si5351_wait_pll_lock(void)
{
uint8_t status;
int count = 100;
do{
status=0xFF;
si5351_bulk_read(0, &status, 1);
if ((status & 0x60) == 0) // PLLA and PLLB locked
return;
}while (--count);
}
#endif
static inline void
si5351_write(uint8_t reg, uint8_t dat)
{
uint8_t buf[] = { reg, dat };
si5351_bulk_write(buf, 2);
}
// register addr, length, data, ...
const uint8_t si5351_configs[] = {
2, SI5351_REG_3_OUTPUT_ENABLE_CONTROL, 0xff,
4, SI5351_REG_16_CLK0_CONTROL, SI5351_CLK_POWERDOWN, SI5351_CLK_POWERDOWN, SI5351_CLK_POWERDOWN,
2, SI5351_REG_183_CRYSTAL_LOAD, SI5351_CRYSTAL_LOAD_6PF|(0<<3)|(0<<0),
// All of this init code run late on sweep
#if 0
// setup PLL (26MHz * 32 = 832MHz, 32/2-2=14)
9, SI5351_REG_PLL_A, /*P3*/0, 1, /*P1*/0, 14, 0, /*P3/P2*/0, 0, 0,
9, SI5351_REG_PLL_B, /*P3*/0, 1, /*P1*/0, 14, 0, /*P3/P2*/0, 0, 0,
// RESET PLL
2, SI5351_REG_177_PLL_RESET, SI5351_PLL_RESET_A | SI5351_PLL_RESET_B | 0x0C, //
// setup multisynth (832MHz / 104 = 8MHz, 104/2-2=50)
9, SI5351_REG_58_MULTISYNTH2, /*P3*/0, 1, /*P1*/0, 50, 0, /*P2|P3*/0, 0, 0,
2, SI5351_REG_18_CLK2_CONTROL, SI5351_CLK_DRIVE_STRENGTH_2MA | SI5351_CLK_INPUT_MULTISYNTH_N | SI5351_CLK_INTEGER_MODE,
#endif
2, SI5351_REG_3_OUTPUT_ENABLE_CONTROL, ~(SI5351_CLK0_EN|SI5351_CLK1_EN|SI5351_CLK2_EN),
0 // sentinel
};
void
si5351_init(void)
{
const uint8_t *p = si5351_configs;
while (*p) {
uint8_t len = *p++;
si5351_bulk_write(p, len);
p += len;
}
si5351_set_band_mode(config._band_mode);
// Set any (let it be XTALFREQ) frequency for AIC can run
si5351_set_frequency(XTALFREQ, 0);
}
static const uint8_t disable_output[] = {
SI5351_REG_16_CLK0_CONTROL,
SI5351_CLK_POWERDOWN, // CLK 0
SI5351_CLK_POWERDOWN, // CLK 1
SI5351_CLK_POWERDOWN // CLK 2
};
/* Get the appropriate starting point for the PLL registers */
static const uint8_t msreg_base[] = {
SI5351_REG_42_MULTISYNTH0,
SI5351_REG_50_MULTISYNTH1,
SI5351_REG_58_MULTISYNTH2,
};
// Reset PLL need then band changes
static void si5351_reset_pll(uint8_t mask)
{
// Writing a 1<<5 will reset PLLA, 1<<7 reset PLLB, this is a self clearing bits.
si5351_write(SI5351_REG_177_PLL_RESET, mask | 0x0C);
}
void si5351_disable_output(void)
{
si5351_write(SI5351_REG_3_OUTPUT_ENABLE_CONTROL, SI5351_CLK0_EN|SI5351_CLK1_EN|SI5351_CLK2_EN);
si5351_bulk_write(disable_output, sizeof(disable_output));
si5351_reset_cache();
}
void si5351_enable_output(void)
{
si5351_write(SI5351_REG_3_OUTPUT_ENABLE_CONTROL, ~(SI5351_CLK0_EN|SI5351_CLK1_EN|SI5351_CLK2_EN));
//si5351_reset_pll(SI5351_PLL_RESET_A | SI5351_PLL_RESET_B);
si5351_reset_cache();
}
void si5351_set_tcxo(uint32_t xtal){
if (xtal < XTALFREQ - 2000000 ||
xtal > XTALFREQ + 2000000) xtal = XTALFREQ;
config._xtal_freq = xtal;
si5351_reset_cache();
}
// Set PLL freq = XTALFREQ * (mult + num/denom)
static void si5351_setupPLL(uint8_t pllSource, /* SI5351_REG_PLL_A or SI5351_REG_PLL_B */
uint32_t mult,
uint32_t num,
uint32_t denom)
{
/* Feedback Multisynth Divider Equation
* where: a = mult, b = num and c = denom
* P1 register is an 18-bit value using following formula:
* P1[17:0] = 128 * mult + int((128*num)/denom) - 512
* P2 register is a 20-bit value using the following formula:
* P2[19:0] = (128 * num) % denom
* P3 register is a 20-bit value using the following formula:
* P3[19:0] = denom
*/
/* Set the main PLL config registers */
mult <<= 7;
num <<= 7;
uint32_t P1 = mult - 512; // Integer mode
uint32_t P2 = 0;
uint32_t P3 = 1;
if (num) { // Fractional mode
P1+= num / denom;
P2 = num % denom;
P3 = denom;
}
// Pll MSN(A|B) registers Datasheet
uint8_t reg[9];
reg[0] = pllSource; // SI5351_REG_PLL_A or SI5351_REG_PLL_B
reg[1] = (P3 & 0x0FF00) >> 8; // MSN_P3[15: 8]
reg[2] = (P3 & 0x000FF); // MSN_P3[ 7: 0]
reg[3] = (P1 & 0x30000) >> 16; // MSN_P1[17:16]
reg[4] = (P1 & 0x0FF00) >> 8; // MSN_P1[15: 8]
reg[5] = (P1 & 0x000FF); // MSN_P1[ 7: 0]
reg[6] = ((P3 & 0xF0000) >> 12) | ((P2 & 0xF0000) >> 16); // MSN_P3[19:16] | MSN_P2[19:16]
reg[7] = (P2 & 0x0FF00) >> 8; // MSN_P2[15: 8]
reg[8] = (P2 & 0x000FF); // MSN_P2[ 7: 0]
si5351_bulk_write(reg, 9);
}
// Set Multisynth divider = (div + num/denom) * rdiv
static void
si5351_setupMultisynth(uint32_t channel,
uint32_t div, // 4,6,8, 8+ ~ 900
uint32_t num,
uint32_t denom,
uint32_t rdiv, // SI5351_R_DIV_1~128
uint8_t chctrl) // SI5351_REG_16_CLKX_CONTROL settings
{
/* Output Multisynth Divider Equations
* where: a = div, b = num and c = denom
* P1 register is an 18-bit value using following formula:
* P1[17:0] = 128 * a + int((128*b)/c) - 512
* P2 register is a 20-bit value using the following formula:
* P2[19:0] = (128 * b) % c
* P3 register is a 20-bit value using the following formula:
* P3[19:0] = c
*/
/* Set the main PLL config registers */
uint32_t P1 = 0;
uint32_t P2 = 0;
uint32_t P3 = 1;
if (div == 4)
rdiv|= SI5351_DIVBY4;
else {
num<<=7;
div<<=7;
P1 = div - 512; // Integer mode
if (num) { // Fractional mode
P1+= num / denom;
P2 = num % denom;
P3 = denom;
}
}
/* Set the MSx config registers */
uint8_t reg[9];
reg[0] = msreg_base[channel]; // SI5351_REG_42_MULTISYNTH0, SI5351_REG_50_MULTISYNTH1, SI5351_REG_58_MULTISYNTH2
reg[1] = (P3 & 0x0FF00)>>8; // MSx_P3[15: 8]
reg[2] = (P3 & 0x000FF); // MSx_P3[ 7: 0]
reg[3] = ((P1 & 0x30000)>>16)| rdiv; // Rx_DIV[2:0] | MSx_DIVBY4[1:0] | MSx_P1[17:16]
reg[4] = (P1 & 0x0FF00)>> 8; // MSx_P1[15: 8]
reg[5] = (P1 & 0x000FF); // MSx_P1[ 7: 0]
reg[6] = ((P3 & 0xF0000)>>12)|((P2 & 0xF0000)>>16); // MSx_P3[19:16] | MSx_P2[19:16]
reg[7] = (P2 & 0x0FF00)>>8; // MSx_P2[15: 8]
reg[8] = (P2 & 0x000FF); // MSx_P2[ 7: 0]
si5351_bulk_write(reg, 9);
/* Configure the clk control and enable the output */
chctrl|= SI5351_CLK_INPUT_MULTISYNTH_N;
if (num == 0)
chctrl|= SI5351_CLK_INTEGER_MODE;
if (clk_cache[channel] != chctrl) {
si5351_write(SI5351_REG_16_CLK0_CONTROL + channel, chctrl);
clk_cache[channel] = chctrl;
}
}
// Find better approximate values for n/d
#define MAX_DENOMINATOR ((1 << 20) - 1)
static void approximate_fraction(uint32_t *n, uint32_t *d)
{
#if 1
// cf. https://github.com/python/cpython/blob/master/Lib/fractions.py#L227
uint32_t denom = *d;
if (denom > MAX_DENOMINATOR) {
uint32_t num = *n;
uint32_t p0 = 0, q0 = 1, p1 = 1, q1 = 0;
while (denom != 0) {
uint32_t a = num / denom;
uint32_t b = num % denom;
uint32_t q2 = q0 + a*q1;
if (q2 > MAX_DENOMINATOR)
break;
uint32_t p2 = p0 + a*p1;
p0 = p1; q0 = q1; p1 = p2; q1 = q2;
num = denom; denom = b;
}
*n = p1;
*d = q1;
}
#else
while (*d >= MAX_DENOMINATOR) {
*n >>= 1;
*d >>= 1;
}
#endif
}
// Setup Multisynth divider for get correct output freq if fixed PLL = pllfreq
static void
si5351_set_frequency_fixedpll(uint32_t channel, uint64_t pllfreq, uint32_t freq, uint32_t rdiv, uint8_t chctrl)
{
uint32_t div = pllfreq / freq; // range: 8 ~ 1800
uint32_t num = pllfreq % freq;
uint32_t denom = freq;
approximate_fraction(&num, &denom);
si5351_setupMultisynth(channel, div, num, denom, rdiv, chctrl);
}
// Setup PLL freq if Multisynth divider fixed = div (need get output = freq/mul)
static void
si5351_setupPLL_freq(uint32_t pllSource, uint64_t pllfreq, uint32_t div)
{
uint32_t xtal = config._xtal_freq * div;
uint32_t multi = pllfreq / xtal;
uint32_t num = pllfreq % xtal;
uint32_t denom = xtal;
approximate_fraction(&num, &denom);
si5351_setupPLL(pllSource, multi, num, denom);
}
#if 0
static void
si5351_set_frequency_fixeddiv(uint8_t channel, uint32_t pll, uint32_t freq, uint32_t div,
uint8_t chctrl, uint32_t mul)
{
si5351_setupPLL_freq(pll, (uint64_t)freq * div, mul);
si5351_setupMultisynth(channel, div, 0, 1, SI5351_R_DIV_1, chctrl);
}
void
si5351_set_frequency(int channel, uint32_t freq, uint8_t drive_strength)
{
if (freq <= 100000000) {
si5351_setupPLL(SI5351_PLL_B, 32, 0, 1);
si5351_set_frequency_fixedpll(channel, SI5351_PLL_B, PLLFREQ, freq, SI5351_R_DIV_1, drive_strength, 1);
} else if (freq < 150000000) {
si5351_set_frequency_fixeddiv(channel, SI5351_PLL_B, freq, 6, drive_strength, 1);
} else {
si5351_set_frequency_fixeddiv(channel, SI5351_PLL_B, freq, 4, drive_strength, 1);
}
}
#endif
typedef struct {
uint32_t freq;
uint8_t mode;
union {
uint8_t div;
uint8_t pll_n;
};
uint8_t mul:4;
uint8_t omul:4;
uint8_t pow:4;
uint8_t opow:4;
uint8_t l_gain;
uint8_t r_gain;
uint16_t freq_align;
} band_strategy_t;
#define SI5351_FIXED_PLL 1
#define SI5351_FIXED_MULT 2
#define SI5351_MIXED 3
#define CONST_BAND const
#ifndef CONST_BAND
#define CONST_BAND
static band_strategy_t *band_s;
void si5351_update_band_config(int idx, uint32_t pidx, uint32_t v){
CONST_BAND band_strategy_t *b = &band_s[idx];
switch(pidx){
case 0:b->mode = v;break;
case 1:b->freq = v;break;
case 2:b->div = v;break;
case 3:b->mul = v;break;
case 4:b->omul = v;break;
case 5:b->pow = v;break;
case 6:b->opow = v;break;
case 7:b->l_gain = v;break;
case 8:b->r_gain = v;break;
case 9:b->l_gain = b->r_gain = v;break;
case 10:b->freq_align = v;break;
}
}
#else
static const band_strategy_t *band_s;
#endif
/*
* Frequency generation divide on band
*/
#define THRESHOLD 300000100U
// Mode for H board v3.3 and SI5351 installed
CONST_BAND band_strategy_t band_strategy_33H_SI5351[] = {
{ 0U, 0, { 0}, 0, 0, -1, -1, -1, -1, 1}, // 0
{ 26000U, SI5351_FIXED_PLL, { 8}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 1
{ 100000000U, SI5351_FIXED_PLL, {32}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 2
{ 130000000U, SI5351_FIXED_MULT,{ 8}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 0, 0, 1}, // 3
{ 180000000U, SI5351_FIXED_MULT,{ 6}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 0, 0, 1}, // 4
{ 1, SI5351_FIXED_MULT,{ 4}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 0, 0, 1}, // 5
{ 460000000U, SI5351_FIXED_MULT,{ 6}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 40, 40, 3*5*4}, // 6
{ 600000000U, SI5351_FIXED_MULT,{ 4}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 40, 40, 3*5*4}, // 7
{ 3, SI5351_FIXED_MULT,{ 4}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 50, 50, 3*5*4}, // 8
{ 1200000000U, SI5351_FIXED_MULT,{ 4}, 5, 7, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 70, 70, 5*7*4}, // 9
{ 5, SI5351_FIXED_MULT,{ 4}, 5, 7, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 70, 70, 5*7*4}, //10
{ 1800000000U, SI5351_FIXED_MULT,{ 4}, 7, 9, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 70, 70, 7*9*4}, //11
{ 7, SI5351_FIXED_MULT,{ 4}, 7, 9, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 70, 70, 7*9*4}, //12
{ 2400000000U, SI5351_FIXED_MULT,{ 4}, 9,11, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 85, 85, 9*11*4}, //13
{ 9, SI5351_FIXED_MULT,{ 4}, 9,11, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 95, 95, 9*11*4}, //14
{ 11, SI5351_FIXED_MULT,{ 4},11,12, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 95, 95, 11*12*4} //15
};
// Mode for H4 board v3.4 and SI5351 installed
CONST_BAND band_strategy_t band_strategy_H4_SI5351[] = {
{ 0U, 0, { 0}, 0, 0, -1, -1, -1, -1, 1}, // 0
{ 26000U, SI5351_FIXED_PLL, { 8}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 1
{ 100000000U, SI5351_FIXED_PLL, {32}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 2
{ 130000000U, SI5351_FIXED_MULT,{ 8}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 0, 0, 1}, // 3
{ 180000000U, SI5351_FIXED_MULT,{ 6}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 0, 0, 1}, // 4
{ 1, SI5351_FIXED_MULT,{ 4}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 0, 0, 1}, // 5
{ 460000000U, SI5351_FIXED_MULT,{ 6}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 40, 40, 3*5*4}, // 6
{ 600000000U, SI5351_FIXED_MULT,{ 4}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 40, 40, 3*5*4}, // 7
{ 3, SI5351_FIXED_MULT,{ 4}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 50, 50, 3*5*4}, // 8
{ 1200000000U, SI5351_FIXED_MULT,{ 4}, 5, 7, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 70, 70, 5*7*4}, // 9
{ 5, SI5351_FIXED_MULT,{ 4}, 5, 7, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 70, 70, 5*7*4}, //10
{ 1800000000U, SI5351_FIXED_MULT,{ 4}, 7, 9, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 70, 70, 7*9*4}, //11
{ 7, SI5351_FIXED_MULT,{ 4}, 7, 9, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 70, 70, 7*9*4}, //12
{ 2400000000U, SI5351_FIXED_MULT,{ 4}, 9,11, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 85, 85, 9*11*4}, //13
{ 9, SI5351_FIXED_MULT,{ 4}, 9,11, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 95, 95, 9*11*4}, //14
{ 11, SI5351_FIXED_MULT,{ 4},11,12, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 95, 95, 11*12*4} //15
};
// Mode for board v3.6 and MS5351 installed
CONST_BAND band_strategy_t band_strategy_36H_MS5351[] = {
{ 0U, 0, { 0}, 0, 0, -1, -1, -1, -1, 1}, // 0
{ 24000U, SI5351_FIXED_PLL, {16}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 1
{ 120000000U, SI5351_FIXED_PLL, {32}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_2MA, SI5351_CLK_DRIVE_STRENGTH_2MA, 0, 0, 1}, // 2
{ 1, SI5351_FIXED_MULT,{ 4}, 1, 1, SI5351_CLK_DRIVE_STRENGTH_4MA, SI5351_CLK_DRIVE_STRENGTH_4MA, 0, 0, 1}, // 3
{ 400000000U, SI5351_FIXED_MULT,{ 8}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 20, 20, 1}, // 4
{ 588000000U, SI5351_FIXED_MULT,{ 6}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 20, 20, 1}, // 5
{ 3, SI5351_FIXED_MULT,{ 4}, 3, 5, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 30, 30, 1}, // 6
{ 5, SI5351_FIXED_MULT,{ 4}, 5, 7, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_6MA, 60, 60, 1}, // 7
{ 7, SI5351_FIXED_MULT,{ 4}, 7, 9, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 75, 75, 7*9*4}, // 8
{ 9, SI5351_FIXED_MULT,{ 4}, 9,11, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 80, 90, 9*11*4}, // 9
{ 11, SI5351_FIXED_MULT,{ 4},11,13, SI5351_CLK_DRIVE_STRENGTH_8MA, SI5351_CLK_DRIVE_STRENGTH_8MA, 95, 95, 11*12*4} // 10};
};
void si5351_set_band_mode(uint16_t t) {
#if defined(NANOVNA_F303)
band_s = t ? band_strategy_36H_MS5351 : band_strategy_H4_SI5351; // !!!! no test MS5351 on H4 board
#else
band_s = t ? band_strategy_36H_MS5351 : band_strategy_33H_SI5351;
#endif
}
uint32_t
si5351_get_harmonic_lvl(uint32_t freq){
uint16_t i;
for (i = 0; ; i++){
uint32_t f = band_s[i].freq; if (f < 20) f*=config._harmonic_freq_threshold;
if (freq <= f)
return i;
}
return i;
}
/*
* Maximum supported frequency = FREQ_HARMONICS * 9U
* configure output as follows:
* CLK0: frequency + offset
* CLK1: frequency
* CLK2: fixed 8MHz
*/
#define OFREQ_CHANNEL 0
#define FREQ_CHANNEL 1
#define AUDIO_CODEC_CHANNEL 2
int
si5351_set_frequency(uint32_t freq, uint8_t drive_strength)
{
uint8_t band;
int delay = 0;
if (freq == 0) return 0;
uint32_t rdiv = SI5351_R_DIV_1;
uint32_t fdiv, pll_n;
uint32_t ofreq = freq + IF_OFFSET;
// Select optimal band for prepared freq
if (freq < 26000U) {
rdiv = SI5351_R_DIV(7);
drive_strength = SI5351_CLK_DRIVE_STRENGTH_2MA; // Always use 2ma
freq<<= 7;
ofreq<<= 7;
band = 1;
} else if (freq <= 1000000U) {
rdiv = SI5351_R_DIV(4);
freq<<= 4;
ofreq<<= 4;
band = 2;
}
else
band = si5351_get_harmonic_lvl(freq);
#if 0
uint32_t align = band_s[band].freq_align;
if (align > 1){
freq/=align;
freq*=align;
ofreq = freq + current_offset;
}
#endif
// Check current power settings
if (current_power != drive_strength){
si5351_reset_cache();
current_power = drive_strength;
}
if (freq == current_freq)
return DELAY_CHANNEL_CHANGE;
if (current_band != band) {
// si5351_write(SI5351_REG_3_OUTPUT_ENABLE_CONTROL, SI5351_CLK0_EN|SI5351_CLK1_EN|SI5351_CLK2_EN);
if (DELAY_RESET_PLL_BEFORE)
si5351_reset_pll(SI5351_PLL_RESET_A | SI5351_PLL_RESET_B);
// Set new gain values
if (band_s[current_band].l_gain != band_s[band].l_gain || band_s[current_band].r_gain != band_s[band].r_gain)
tlv320aic3204_set_gain(band_s[band].l_gain, band_s[band].r_gain);
// Add delay
if (DELAY_RESET_PLL_BEFORE)
chThdSleepMicroseconds(DELAY_RESET_PLL_BEFORE);
}
uint32_t mul = band_s[band].mul;
uint32_t omul = band_s[band].omul;
uint8_t ds = drive_strength;
uint8_t ods = drive_strength;
if (drive_strength > SI5351_CLK_DRIVE_STRENGTH_8MA) {ds = band_s[band].pow; ods = band_s[band].opow;}
switch (band_s[band].mode) {
// 800Hz to 10kHz PLLN = 8
case SI5351_FIXED_PLL: // 10kHz to 100MHz PLLN = 32
pll_n = band_s[band].pll_n;
// Setup CH0 and CH1 constant PLLA freq at band change, and set CH2 freq = CLK2_FREQUENCY
if (current_band != band) {
si5351_setupPLL(SI5351_REG_PLL_A, pll_n, 0, 1);
si5351_setupPLL(SI5351_REG_PLL_B, PLL_N_2, 0, 1);
si5351_set_frequency_fixedpll(AUDIO_CODEC_CHANNEL, config._xtal_freq * PLL_N_2, CLK2_FREQUENCY, SI5351_R_DIV_1, SI5351_CLK_DRIVE_STRENGTH_2MA | SI5351_CLK_PLL_SELECT_B);
}
delay = DELAY_BAND_1_2;
// Calculate and set CH0 and CH1 divider
si5351_set_frequency_fixedpll(OFREQ_CHANNEL, (uint64_t)omul * config._xtal_freq * pll_n, ofreq, rdiv, ods | SI5351_CLK_PLL_SELECT_A);
si5351_set_frequency_fixedpll( FREQ_CHANNEL, (uint64_t) mul * config._xtal_freq * pll_n, freq, rdiv, ds | SI5351_CLK_PLL_SELECT_A);
break;
#if 0
case SI5351_MIXED:
fdiv = band_s[band].div;
pll_n = 32;
// Calculate and set fixed PLL frequency for CH0 freq+offset
if (band_s[current_band].div != band_s[band].div)
si5351_setupPLL(SI5351_REG_PLL_A, pll_n, 0, 1);
// Calculate and set variable PLL frequency for CH1 freq
si5351_setupPLL_freq(SI5351_REG_PLL_B, (uint64_t)freq * fdiv, mul); // set PLLB freq = ( freq/ mul)*fdiv
// Setup CH1 constant fdiv divider at change
if (band_s[current_band].div != band_s[band].div)
si5351_setupMultisynth(FREQ_CHANNEL, fdiv, 0, 1, SI5351_R_DIV_1, ds | SI5351_CLK_PLL_SELECT_B);
// Set CH0 divider
si5351_set_frequency_fixedpll(OFREQ_CHANNEL, (uint64_t)omul * config._xtal_freq * pll_n, ofreq, rdiv, ods | SI5351_CLK_PLL_SELECT_A);
// Calculate CH2 freq = CLK2_FREQUENCY, depend from calculated before CH1 PLLB = (freq/mul)*fdiv
si5351_set_frequency_fixedpll(AUDIO_CODEC_CHANNEL, (uint64_t)freq * fdiv, CLK2_FREQUENCY * mul, SI5351_R_DIV_1, SI5351_CLK_DRIVE_STRENGTH_2MA | SI5351_CLK_PLL_SELECT_B);
delay= DELAY_BAND_3_4;
break;
#endif
// fdiv = 8, f 100-130 PLL 800-1040
// fdiv = 6, f 130-170 PLL 780-1050
case SI5351_FIXED_MULT: // fdiv = 4, f 170-270 PLL 680-1080
fdiv = band_s[band].div;
// Calculate and set CH0 and CH1 PLL freq
si5351_setupPLL_freq(SI5351_REG_PLL_A, (uint64_t)ofreq * fdiv, omul); // set PLLA freq = (ofreq/omul)*fdiv
si5351_setupPLL_freq(SI5351_REG_PLL_B, (uint64_t) freq * fdiv, mul); // set PLLB freq = ( freq/ mul)*fdiv
// Setup CH0 and CH1 constant fdiv divider at change
if (band_s[current_band].div != band_s[band].div) {
si5351_setupMultisynth(OFREQ_CHANNEL, fdiv, 0, 1, SI5351_R_DIV_1, ods | SI5351_CLK_PLL_SELECT_A);
si5351_setupMultisynth( FREQ_CHANNEL, fdiv, 0, 1, SI5351_R_DIV_1, ds | SI5351_CLK_PLL_SELECT_B);
}
// Calculate CH2 freq = CLK2_FREQUENCY, depend from calculated before CH1 PLLB = (freq/mul)*fdiv
si5351_set_frequency_fixedpll(AUDIO_CODEC_CHANNEL, (uint64_t)freq * fdiv, CLK2_FREQUENCY * mul, SI5351_R_DIV_1, SI5351_CLK_DRIVE_STRENGTH_2MA | SI5351_CLK_PLL_SELECT_B);
delay= DELAY_BAND_3_4;
break;
}
if (current_band != band) {
// si5351_write(SI5351_REG_3_OUTPUT_ENABLE_CONTROL, ~(SI5351_CLK0_EN|SI5351_CLK1_EN|SI5351_CLK2_EN));
// Possibly not need add delay now
if (DELAY_RESET_PLL_AFTER){
chThdSleepMicroseconds(DELAY_RESET_PLL_AFTER);
si5351_reset_pll(SI5351_PLL_RESET_A|SI5351_PLL_RESET_B);
}
current_band = band;
delay = DELAY_BANDCHANGE;
}
current_freq = freq;
return delay;
}