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si4432.c
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si4432.c
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/* Copyright (c) 2020, Erik Kaashoek [email protected]
* 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 "ch.h"
#include "hal.h"
#include "nanovna.h"
#include <math.h>
#include "si4432.h"
#define _FAST_SHIFT_
#pragma GCC push_options
#pragma GCC optimize ("O2")
#define SPI2_CLK_HIGH palSetPad(GPIOB, GPIO_SPI2_CLK)
#define SPI2_CLK_LOW palClearPad(GPIOB, GPIO_SPI2_CLK)
#define SPI2_SDI_HIGH palSetPad(GPIOB, GPIO_SPI2_SDI)
#define SPI2_SDI_LOW palClearPad(GPIOB, GPIO_SPI2_SDI)
#define SPI2_RESET palClearPort(GPIOB, (1<<GPIO_SPI2_CLK)|(1<<GPIO_SPI2_SDI))
#define SPI2_SDO ((palReadPort(GPIOB)>>GPIO_SPI2_SDO)&1)
#define SPI2_portSDO (palReadPort(GPIOB)&(1<<GPIO_SPI2_SDO))
#define CS_PE_HIGH palSetPad(GPIOC, GPIO_PE_SEL)
#define CS_PE_LOW palClearPad(GPIOC, GPIO_PE_SEL)
//#define MAXLOG 1024
//unsigned char SI4432_logging[MAXLOG];
//volatile int log_index = 0;
//#define SI4432_log(X) { if (log_index < MAXLOG) SI4432_logging[log_index++] = X; }
#define SI4432_log(X)
static void shiftOut(uint8_t val)
{
// SI4432_log(SI4432_Sel);
// SI4432_log(val);
#ifndef _FAST_SHIFT_
uint16_t i = 8;
do {
if (val & 0x80)
SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
val<<=1;
}while(--i);
#else
if (val & 0x80) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x40) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x20) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x10) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x08) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x04) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x02) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
if (val & 0x01) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
#endif
}
static uint8_t shiftIn(void)
{
uint32_t value = 0;
#ifndef _FAST_SHIFT_
uint16_t i = 8;
do {
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
}while(--i);
#else
SPI2_CLK_HIGH;
value =SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
value<<=1;
SPI2_CLK_HIGH;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
#endif
return value>>GPIO_SPI2_SDO;
}
static inline void shiftInBuf(uint16_t sel, uint8_t addr, deviceRSSI_t *buf, uint16_t size, uint16_t delay) {
int idx = 0;
do{
palClearPad(GPIOC, sel);
uint32_t value = addr;
uint16_t i = 8;
do {
if (value & 0x80) SPI2_SDI_HIGH;
SPI2_CLK_HIGH;
SPI2_RESET;
value<<=1;
}while(--i);
value = 0;
i = 8;
do {
SPI2_CLK_HIGH;
value<<=1;
value|=SPI2_portSDO;
SPI2_CLK_LOW;
}while(--i);
buf[idx]=value>>GPIO_SPI2_SDO;
palSetPad(GPIOC, sel);
if (++idx >=size) return;
if (delay)
my_microsecond_delay(delay);
}while(1);
}
#ifdef __SI4432__
#define CS_SI0_HIGH palSetPad(GPIOC, GPIO_RX_SEL)
#define CS_SI1_HIGH palSetPad(GPIOC, GPIO_LO_SEL)
#define RF_POWER_HIGH palSetPad(GPIOB, GPIO_RF_PWR)
#define CS_SI0_LOW palClearPad(GPIOC, GPIO_RX_SEL)
#define CS_SI1_LOW palClearPad(GPIOC, GPIO_LO_SEL)
const uint16_t SI_nSEL[MAX_SI4432+1] = { GPIO_RX_SEL, GPIO_LO_SEL, 0}; // #3 is dummy!!!!!!
uint16_t SI4432_Sel = GPIO_RX_SEL; // currently selected SI4432
uint8_t SI4432_rbw_selected = 0;
// volatile int SI4432_guard = 0;
#ifdef __SI4432_H__
#define SELECT_DELAY 10
void SI4432_shiftOutDword(uint32_t buf, uint16_t size) {
uint16_t port = SI_nSEL[SI4432_Sel];
palClearPad(GPIOC, port);
do{
shiftOut(buf);
buf>>=8;
}while(--size);
palSetPad(GPIOC, port);
}
#ifndef SI4432_Write_Byte
void SI4432_Write_Byte(uint8_t ADR, uint8_t DATA )
{
uint16_t port = SI_nSEL[SI4432_Sel];
// if (SI4432_guard)
// while(1) ;
// SI4432_guard = 1;
// SPI2_CLK_LOW;
palClearPad(GPIOC, port);
// chThdSleepMicroseconds(SELECT_DELAY);
ADR |= 0x80 ; // RW = 1
shiftOut( ADR );
shiftOut( DATA );
palSetPad(GPIOC, port);
// SI4432_guard = 0;
}
void SI4432_Write_2_Byte(uint8_t ADR, uint8_t DATA1, uint8_t DATA2)
{
uint16_t port = SI_nSEL[SI4432_Sel];
// if (SI4432_guard)
// while(1) ;
// SI4432_guard = 1;
// SPI2_CLK_LOW;
palClearPad(GPIOC, port);
// chThdSleepMicroseconds(SELECT_DELAY);
ADR |= 0x80 ; // RW = 1
shiftOut( ADR );
shiftOut( DATA1 );
shiftOut( DATA2 );
palSetPad(GPIOC, port);
// SI4432_guard = 0;
}
#endif
#ifndef SI4432_Write_3_Byte
void SI4432_Write_3_Byte(uint8_t ADR, uint8_t DATA1, uint8_t DATA2, uint8_t DATA3)
{
uint16_t port = SI_nSEL[SI4432_Sel];
// if (SI4432_guard)
// while(1) ;
// SI4432_guard = 1;
// SPI2_CLK_LOW;
palClearPad(GPIOC, port);
// chThdSleepMicroseconds(SELECT_DELAY);
ADR |= 0x80 ; // RW = 1
shiftOut( ADR );
shiftOut( DATA1 );
shiftOut( DATA2 );
shiftOut( DATA3 );
palSetPad(GPIOC, port);
// SI4432_guard = 0;
}
#endif
uint8_t SI4432_Read_Byte(uint8_t ADR)
{
uint8_t DATA ;
uint16_t port = SI_nSEL[SI4432_Sel];
// if (SI4432_guard)
// while(1) ;
// SI4432_guard = 1;
// SPI2_CLK_LOW;
palClearPad(GPIOC, port);
shiftOut(ADR);
DATA = shiftIn();
palSetPad(GPIOC, port);
// SI4432_guard = 0;
return DATA ;
}
void SI4432_Reset(void)
{
int count = 0;
SI4432_Read_Byte (SI4432_INT_STATUS1); // Clear pending interrupts
SI4432_Read_Byte (SI4432_INT_STATUS2);
// always perform a system reset (don't send 0x87)
SI4432_Write_Byte(SI4432_STATE, 0x80);
chThdSleepMilliseconds(10);
// wait for chiprdy bit
while (count++ < 100 && ( SI4432_Read_Byte (SI4432_INT_STATUS2) & 0x02 ) == 0) {
chThdSleepMilliseconds(10);
}
}
void SI4432_Drive(int d)
{
SI4432_Write_Byte(SI4432_TX_POWER, (uint8_t) (0x18+(d & 7)));
}
void SI4432_Transmit(int d)
{
int count = 0;
SI4432_Drive(d);
if (( SI4432_Read_Byte(SI4432_DEV_STATUS) & 0x03 ) == 2)
return; // Already in transmit mode
chThdSleepMilliseconds(3);
SI4432_Write_Byte(SI4432_STATE, 0x02);
chThdSleepMilliseconds(3);
SI4432_Write_Byte(SI4432_STATE, 0x0b);
chThdSleepMilliseconds(10);
while (count++ < 100 && ( SI4432_Read_Byte(SI4432_DEV_STATUS) & 0x03 ) != 2) {
chThdSleepMilliseconds(10);
}
}
void SI4432_Receive(void)
{
int count = 0;
if (( SI4432_Read_Byte (SI4432_DEV_STATUS) & 0x03 ) == 1)
return; // Already in receive mode
chThdSleepMilliseconds(3);
SI4432_Write_Byte(SI4432_STATE, 0x02);
chThdSleepMilliseconds(3);
SI4432_Write_Byte(SI4432_STATE, 0x07);
chThdSleepMilliseconds(10);
while (count++ < 100 && ( SI4432_Read_Byte(SI4432_DEV_STATUS) & 0x03 ) != 1) {
chThdSleepMilliseconds(5);
}
}
// User asks for an RBW of WISH, go through table finding the last triple
// for which WISH is greater than the first entry, use those values,
// Return the first entry of the following triple for the RBW actually achieved
#define IF_BW(dwn3, ndec, filset) (((dwn3)<<7)|((ndec)<<4)|(filset))
typedef struct {
uint8_t reg; // IF_BW(dwn3, ndec, filset)
int8_t RSSI_correction_x_10; // Correction * 10
uint16_t RBWx10; // RBW * 10 in kHz
}RBW_t; // sizeof(RBW_t) = 4 bytes
static const RBW_t RBW_choices[] =
{
// BW register corr freq
// {IF_BW(0,5,1),0,26},
// {IF_BW(0,5,2),0,28},
#if 0
{IF_BW(0,5,3),3,31},
{IF_BW(0,5,4),-3,32},
{IF_BW(0,5,5),6,37},
{IF_BW(0,5,6),5,42},
{IF_BW(0,5,7),5,45},
{IF_BW(0,4,1),0,49},
{IF_BW(0,4,2),0,54},
{IF_BW(0,4,3),0,59},
{IF_BW(0,4,4),0,61},
{IF_BW(0,4,5),5,72},
{IF_BW(0,4,6),5,82},
{IF_BW(0,4,7),5,88},
{IF_BW(0,3,1),0,95},
{IF_BW(0,3,2),0,106},
{IF_BW(0,3,3),2,115},
{IF_BW(0,3,4),0,121},
{IF_BW(0,3,5),5,142},
{IF_BW(0,3,6),5,162},
{IF_BW(0,3,7),5,175},
{IF_BW(0,2,1),0,189},
{IF_BW(0,2,2),0,210},
{IF_BW(0,2,3),3,227},
{IF_BW(0,2,4),0,240},
{IF_BW(0,2,5),5,282},
{IF_BW(0,2,6),5,322},
{IF_BW(0,2,7),5,347},
{IF_BW(0,1,1),0,377},
{IF_BW(0,1,2),0,417},
{IF_BW(0,1,3),1,452},
{IF_BW(0,1,4),0,479},
{IF_BW(0,1,5),5,562},
{IF_BW(0,1,6),5,641},
{IF_BW(0,1,7),5,692},
{IF_BW(0,0,1),0,752},
{IF_BW(0,0,2),0,832},
{IF_BW(0,0,3),0,900},
{IF_BW(0,0,4),-1,953},
{IF_BW(0,0,5),9,1121},
{IF_BW(0,0,6),2,1279},
{IF_BW(0,0,7),5,1379},
{IF_BW(1,1,4),20,1428},
{IF_BW(1,1,5),26,1678},
{IF_BW(1,1,9),-50,1811},
{IF_BW(1,0,15),-100,1915},
{IF_BW(1,0,1),20,2251},
{IF_BW(1,0,2),22,2488},
{IF_BW(1,0,3),21,2693},
{IF_BW(1,0,4),15,2849},
{IF_BW(1,0,8),-15,3355},
{IF_BW(1,0,9),-53,3618},
{IF_BW(1,0,10),-15,4202},
{IF_BW(1,0,11),-13,4684},
{IF_BW(1,0,12),-20,5188},
{IF_BW(1,0,13),-14,5770},
{IF_BW(1,0,14),-9,6207},
#else
{IF_BW(0,5,3),1,31},
{IF_BW(0,5,4),-4,32},
{IF_BW(0,5,5),1,37},
{IF_BW(0,5,6),-3,42},
{IF_BW(0,5,7),-3,45},
{IF_BW(0,4,1),-4,49},
{IF_BW(0,4,2),-4,54},
{IF_BW(0,4,3),-3,59},
{IF_BW(0,4,4),-4,61},
{IF_BW(0,4,5),1,72},
{IF_BW(0,4,6),1,82},
{IF_BW(0,4,7),1,88},
{IF_BW(0,3,1),-4,95},
{IF_BW(0,3,2),-4,106},
{IF_BW(0,3,3),-3,115},
{IF_BW(0,3,4),-8,121},
{IF_BW(0,3,5),1,142},
{IF_BW(0,3,6),1,162},
{IF_BW(0,3,7),1,175},
{IF_BW(0,2,1),-4,189},
{IF_BW(0,2,2),-4,210},
{IF_BW(0,2,3),1,227},
{IF_BW(0,2,4),-4,240},
{IF_BW(0,2,5),1,282},
{IF_BW(0,2,6),1,322},
{IF_BW(0,2,7),1,347},
{IF_BW(0,1,1),-4,377},
{IF_BW(0,1,2),-4,417},
{IF_BW(0,1,3),-3,452},
{IF_BW(0,1,4),-4,479},
{IF_BW(0,1,5),1,562},
{IF_BW(0,1,6),1,641},
{IF_BW(0,1,7),1,692},
{IF_BW(0,0,1),-4,752},
{IF_BW(0,0,2),-4,832},
{IF_BW(0,0,3),-3,900},
{IF_BW(0,0,4),-4,953},
{IF_BW(0,0,5),6,1121},
{IF_BW(0,0,6),1,1279},
{IF_BW(0,0,7),1,1379},
{IF_BW(1,1,4),16,1428},
{IF_BW(1,1,5),22,1678},
{IF_BW(1,1,9),-53,1811},
{IF_BW(1,0,15),-104,1915},
{IF_BW(1,0,1),16,2251},
{IF_BW(1,0,2),21,2488},
{IF_BW(1,0,3),17,2693},
{IF_BW(1,0,4),11,2849},
{IF_BW(1,0,8),-19,3355},
{IF_BW(1,0,9),-54,3618},
{IF_BW(1,0,10),-14,4202},
{IF_BW(1,0,11),-14,4684},
{IF_BW(1,0,12),-23,5188},
{IF_BW(1,0,13),-14,5770},
{IF_BW(1,0,14),-9,6207},
#endif
};
const uint8_t SI4432_RBW_count = ARRAY_COUNT(RBW_choices);
static pureRSSI_t SI4432_RSSI_correction = float_TO_PURE_RSSI(-120);
uint16_t force_rbw(int i)
{
SI4432_Write_Byte(SI4432_IF_FILTER_BW, RBW_choices[i].reg); // Write RBW settings to Si4432
SI4432_RSSI_correction = float_TO_PURE_RSSI(RBW_choices[i].RSSI_correction_x_10 - 1200)/10; // Set RSSI correction
// SI4432_RSSI_correction = float_TO_PURE_RSSI( - 1200)/10; // Set RSSI correction
SI4432_rbw_selected = i;
return RBW_choices[i].RBWx10; // RBW achieved by Si4432 in kHz * 10
}
uint16_t set_rbw(uint16_t WISH) {
uint16_t i;
for (i=0; i <ARRAY_COUNT(RBW_choices) - 1; i++)
if (WISH <= RBW_choices[i].RBWx10)
break;
return force_rbw(i);
}
uint8_t SI4432_frequency_changed = false;
uint8_t SI4432_offset_changed = false;
// #define __CACHE_BAND__ // Is not reliable!!!!!!
#ifdef __CACHE_BAND__
static uint8_t old_freq_band[2] = {-1,-1};
static uint8_t written[2]= {0,0};
#endif
void SI4432_Set_Frequency ( freq_t Freq ) {
// int mode = SI4432_Read_Byte(0x02) & 0x03; // Disabled as unreliable
// SI4432_Write_Byte(0x07, 0x02); // Switch to tune mode
// Freq = (Freq / 1000 ) * 1000; // force freq to 1000 grid
uint8_t hbsel;
if (0) shell_printf("%d: Freq %q\r\n", SI4432_Sel, Freq);
if (Freq >= 480000000U) {
hbsel = 1<<5;
Freq>>=1;
} else {
hbsel = 0;
}
uint8_t sbsel = 1 << 6;
uint32_t N = (Freq / config.setting_frequency_10mhz - 24)&0x1F;
uint32_t K = Freq % config.setting_frequency_10mhz;
if (N>=24) {
N=23;
K = 9999999;
}
uint32_t Carrier = (K<<2) / 625;
uint8_t Freq_Band = N | hbsel | sbsel;
// int count = 0;
// my_microsecond_delay(200);
// int s;
// while (count++ < 100 && ( (s = SI4432_Read_Byte ( 0x02 )) & 0x03 ) != 0) {
// my_microsecond_delay(100);
// }
#ifdef __CACHE_BAND__
if (old_freq_band[SI4432_Sel] == Freq_Band) {
if (written[SI4432_Sel] < 4) {
SI4432_Write_Byte(SI4432_FREQBAND, Freq_Band );
written[SI4432_Sel]++;
}
SI4432_Write_Byte(SI4432_FREQCARRIER_H, (Carrier>>8) & 0xFF );
SI4432_Write_Byte(SI4432_FREQCARRIER_L, Carrier & 0xFF );
} else {
#endif
#if 0 // Do not use multi byte write
SI4432_Write_Byte(SI4432_FREQBAND, Freq_Band ); // Freq band must be written first !!!!!!!!!!!!
SI4432_Write_Byte(SI4432_FREQCARRIER_H, (Carrier>>8) & 0xFF );
SI4432_Write_Byte(SI4432_FREQCARRIER_L, Carrier & 0xFF );
#else
SI4432_Write_3_Byte (SI4432_FREQBAND, Freq_Band, (Carrier>>8) & 0xFF, Carrier & 0xFF);
#endif
#ifdef __CACHE_BAND__
old_freq_band[SI4432_Sel] = Freq_Band;
written[SI4432_Sel] = 0;
}
#endif
SI4432_frequency_changed = true;
// if (mode == 1) // RX mode Disabled as unreliable
// SI4432_Write_Byte( 0x07, 0x07);
// else
// SI4432_Write_Byte( 0x07, 0x0B);
}
uint32_t SI4432_step_delay = 1500;
//extern int setting.repeat;
#ifdef __FAST_SWEEP__
extern deviceRSSI_t age[POINTS_COUNT];
static uint16_t buf_index = 0;
static uint16_t buf_end = 0;
static bool buf_read = false;
#if 0
int SI4432_is_fast_mode(void)
{
return buf_read;
}
#endif
#ifdef __ULTRA__
void enable_ultra(int s)
{
static int old_ultra = -1;
if (s != old_ultra) {
#ifdef TINYSA4
if (s)
palClearLine(LINE_ULTRA);
else
palSetLine(LINE_ULTRA);
#endif
old_ultra = s;
}
}
#endif
//--------------------------- Trigger -------------------
// ************** trigger mode if need
#if 0
// trigger on measure 4 point
#define T_POINTS 4
#define T_LEVEL_UNDEF (1<<(16-T_POINTS)) // should drop after 4 shifts left
#define T_LEVEL_BELOW 1
#define T_LEVEL_ABOVE 0
// Trigger mask, should have width T_POINTS bit
#define T_DOWN_MASK (0b0011) // 2 from up 2 to bottom
#define T_UP_MASK (0b1100) // 2 from bottom 2 to up
#define T_LEVEL_CLEAN ~(1<<T_POINTS) // cleanup old trigger data
#else
// trigger on measure 2 point
#define T_POINTS 2
#define T_LEVEL_UNDEF (1<<(16-T_POINTS)) // should drop after 2 shifts left
#define T_LEVEL_BELOW 1
#define T_LEVEL_ABOVE 0
// Trigger mask, should have width T_POINTS bit
#define T_DOWN_MASK (0b0001) // 1 from up 1 to bottom
#define T_UP_MASK (0b0010) // 1 from bottom 1 to up
#define T_LEVEL_CLEAN ~(1<<T_POINTS) // cleanup old trigger data
#endif
enum { ST_ARMING, ST_WAITING, ST_FILLING };
void SI4432_trigger_fill(int s, uint8_t trigger_lvl, int up_direction, int trigger_mode)
{
SI4432_Sel = s;
uint8_t rssi;
uint16_t sel = SI_nSEL[SI4432_Sel];
uint32_t t = setting.additional_step_delay_us;
systime_t measure = chVTGetSystemTimeX();
int waiting = ST_ARMING;
// __disable_irq();
int i = 0;
uint16_t t_mode = up_direction ? T_UP_MASK : T_DOWN_MASK;
uint16_t data_level = T_LEVEL_UNDEF;
do {
if (operation_requested) // allow aborting a wait for trigger
return; // abort
palClearPad(GPIOC, sel);
shiftOut(SI4432_REG_RSSI);
age[i++] = rssi = shiftIn();
palSetPad(GPIOC, sel);
if (i >= sweep_points)
i = 0;
switch (waiting) {
case ST_ARMING:
if (i == sweep_points-1) {
waiting = ST_WAITING;
setting.measure_sweep_time_us = sa_ST2US(chVTGetSystemTimeX() - measure);
}
break;
case ST_WAITING:
// Store data level bitfield (remember only last 2 states)
// T_LEVEL_UNDEF mode bit drop after 2 shifts
#if 0
if (rssi < trigger_lvl) {
data_level = ((data_level<<1) | (T_LEVEL_BELOW))&(T_LEVEL_CLEAN);
} else {
data_level = ((data_level<<1) | (T_LEVEL_ABOVE))&(T_LEVEL_CLEAN);
}
#else
data_level = ((data_level<<1) | (rssi < trigger_lvl ? T_LEVEL_BELOW : T_LEVEL_ABOVE))&(T_LEVEL_CLEAN);
#endif
if (data_level == t_mode) { // wait trigger
// if (i == 128) { // wait trigger
waiting = ST_FILLING;
switch (trigger_mode) {
case T_PRE: // Trigger at the begin of the scan
buf_index = i;
goto fill_rest;
break;
case T_POST: // Trigger at the end of the scan
buf_index = i;
goto done;
break;
case T_MID: // Trigger in the middle of the scan
buf_index = i + sweep_points/2;
if (buf_index >= sweep_points)
buf_index -= sweep_points;
break;
}
}
break;
case ST_FILLING:
if (i == buf_index)
goto done;
}
fill_rest:
if (t)
my_microsecond_delay(t);
}while(1);
done:
buf_end = buf_index;
buf_read = true;
}
void SI4432_Fill(int s, int start)
{
SI4432_Sel = s;
uint16_t sel = SI_nSEL[SI4432_Sel];
#if 0
uint32_t t = calc_min_sweep_time_us(); // Time to delay in uS for all sweep
if (t < setting.sweep_time_us){
t = setting.sweep_time_us - t;
t = t / (sweep_points - 1); // Now in uS per point
}
else
t = 0;
#endif
uint32_t t = setting.additional_step_delay_us;
systime_t measure = chVTGetSystemTimeX();
// __disable_irq();
#if 1
int stop = sweep_points - start;
int i = 0;
uint8_t *buf = &age[start];
do {
palClearPad(GPIOC, sel);
shiftOut(SI4432_REG_RSSI);
buf[i]=shiftIn();
palSetPad(GPIOC, sel);
if (++i >=stop) break;
if (t)
my_microsecond_delay(t);
} while(1);
#else
shiftInBuf(sel, SI4432_REG_RSSI, &age[start], sweep_points - start, t);
#endif
// __enable_irq();
setting.measure_sweep_time_us = sa_ST2US(chVTGetSystemTimeX() - measure);
buf_index = start; // Is used to skip 1st entry during level triggering
buf_end = sweep_points - 1;
buf_read = true;
}
#endif
#ifdef __LISTEN__
const uint8_t dBm_to_volt [] =
{
255,
225,
198,
175,
154,
136,
120,
106,
93,
82,
72,
64,
56,
50,
44,
39,
34,
30,
26,
23,
21,
18,
16,
14,
12,
11,
10,
8,
7,
7,
6,
5,
5,
};
void SI4432_Listen(int s)
{
SI4432_Sel = s;
uint16_t sel = SI_nSEL[SI4432_Sel];
uint8_t max = 0;
uint16_t count = 0;
operation_requested = OP_NONE;
do {
uint8_t v;
palClearPad(GPIOC, sel);
shiftOut(SI4432_REG_RSSI);
v = shiftIn();
palSetPad(GPIOC, sel);
if (max < v) // Peak
max = v;
if (count > 1000) { // Decay
max -= 1;
count = 0;
} else
count++;
v = max - v;
DAC->DHR12R1 = dBm_to_volt[v] << 4; // Use DAC: CH1 and put 12 bit right aligned value
} while(operation_requested == OP_NONE);
count = 0;
// dacPutChannelX(&DACD1, 0, 0);
}
#endif
#define MINIMUM_WAIT_FOR_RSSI 280
uint32_t SI4432_offset_delay = 300;
pureRSSI_t getSI4432_RSSI_correction(void){
return SI4432_RSSI_correction;
};
pureRSSI_t SI4432_RSSI(uint32_t i, int s, bool break_on_operation)
{
(void) i;
int32_t RSSI_RAW;
// SEE DATASHEET PAGE 61
#ifdef USE_SI4463 // Not used!!!!!!!
if (SI4432_Sel == 2) {
RSSI_RAW = Si446x_getRSSI();
} else
#endif
//START_PROFILE
#ifdef __FAST_SWEEP__
if (buf_read) {
pureRSSI_t val = DEVICE_TO_PURE_RSSI(age[buf_index++]);
if (buf_index >= sweep_points)
buf_index = 0;
if (buf_index == buf_end)
buf_read = false;
return val;
}
#endif
SI4432_Sel = s;
int stepdelay = SI4432_step_delay;
if (SI4432_frequency_changed) {
if (stepdelay < MINIMUM_WAIT_FOR_RSSI) {
stepdelay = MINIMUM_WAIT_FOR_RSSI;
}
SI4432_frequency_changed = false;
} else if (SI4432_offset_changed) {
// stepdelay = MINIMUM_WAIT_FOR_RSSI + (stepdelay - MINIMUM_WAIT_FOR_RSSI)/8;
stepdelay = SI4432_offset_delay;
SI4432_offset_changed = false;
}
if (stepdelay)
my_microsecond_delay(stepdelay);
// chThdSleepMicroseconds(SI4432_step_delay);
i = setting.repeat;
RSSI_RAW = 0;
do{
RSSI_RAW += DEVICE_TO_PURE_RSSI((deviceRSSI_t)SI4432_Read_Byte(SI4432_REG_RSSI));
if (--i == 0) break;
my_microsecond_delay(100);
if (break_on_operation && operation_requested)
break;
}while(1);
if (setting.repeat > 1){
RSSI_RAW = RSSI_RAW / setting.repeat;
}
// if (MODE_INPUT(setting.mode) && RSSI_RAW == 0)
// SI4432_Init();
#ifdef __SIMULATION__
#error "Fixme!!! add correct simulation in pureRSSI_t type"
RSSI_RAW = Simulated_SI4432_RSSI(i,s);
#endif
//STOP_PROFILE
// Serial.println(dBm,2);
return RSSI_RAW;
}
static const uint8_t SI4432_init_script[] =
{
SI4432_INT_ENABLE1, 0x0,
SI4432_INT_ENABLE2, 0x0,
SI4432_CLOCK_RECOVERY_GEARSHIFT, 0x00,
SI4432_AGC_OVERRIDE, 0x60,
SI4432_AFC_LOOP_GEARSHIFT_OVERRIDE, 0x00,
SI4432_AFC_TIMING_CONTROL, 0x02,
SI4432_CLOCK_RECOVERY_GEARSHIFT, 0x03,
SI4432_CLOCK_RECOVERY_OFFSET2, 0x01,
SI4432_CLOCK_RECOVERY_OFFSET1, 0x11,
SI4432_CLOCK_RECOVERY_OFFSET0, 0x11,
SI4432_CLOCK_RECOVERY_TIMING_GAIN1, 0x01,
SI4432_CLOCK_RECOVERY_TIMING_GAIN0, 0x13,
SI4432_AFC_LIMITER, 0xFF,
SI4432_DATAACCESS_CONTROL, 0x61, // Disable all packet handling
SI4432_AGC_OVERRIDE, 0x60, // AGC, no LNA, fast gain increment
SI4432_GPIO0_CONF, 0x12, // Normal
SI4432_GPIO1_CONF, 0x15,
SI4432_GPIO2_CONF, 0x1F
};
void SI4432_Sub_Init(void)
{
SI4432_Reset();
const uint8_t *p = SI4432_init_script;
while (*p) {
uint8_t r = *p++;
uint8_t v = *p++;
SI4432_Write_Byte (r,v);
}
// IF Filter Bandwidth
// set_rbw(100) ;
// SI4432_Receive();
}
#define V0_XTAL_CAPACITANCE 0x64
#define V1_XTAL_CAPACITANCE 0x64
void SI4432_Init()
{
#if 1
CS_SI0_LOW; // Drop CS so power can be removed
CS_SI1_LOW; // Drop CS so power can be removed
CS_PE_LOW; // low is the default safe state
SPI2_CLK_LOW; // low is the default safe state
SPI2_SDI_LOW; // will be set with any data out
palClearPad(GPIOB, GPIO_RF_PWR); // Drop power
chThdSleepMilliseconds(10); // Wait
palSetPad(GPIOB, GPIO_RF_PWR); // Restore power
CS_SI0_HIGH; // And set chip select lines back to inactive
CS_SI1_HIGH;
chThdSleepMilliseconds(10); // Wait
#endif
SPI2_CLK_LOW;
//DebugLine("IO set");
SI4432_Sel = SI4432_RX;
SI4432_Sub_Init();
SI4432_Sel = SI4432_LO;
SI4432_Sub_Init();
//DebugLine("1 init done");
}
void set_calibration_freq(int freq)
{
SI4432_Sel = SI4432_LO; //Select Lo module
if (freq < 0 || freq > 7 ) {
SI4432_Write_Byte(SI4432_GPIO2_CONF, 0x1F) ; // Set GPIO2 to GND
} else {
SI4432_Write_Byte(SI4432_GPIO2_CONF, 0xC0) ; // Set GPIO2 maximumdrive and clock output
SI4432_Write_Byte(Si4432_UC_OUTPUT_CLOCK, freq & 0x07) ; // Set GPIO2 frequency
}
}
#endif
#endif
//------------PE4302 -----------------------------------------------
#ifdef __PE4302__
// Comment out this define to use parallel mode PE4302
#define PE4302_en 10
void PE4302_init(void) {
CS_PE_LOW;
}
#define PE4302_DELAY 100
#if 0
void PE4302_shiftOut(uint8_t val)
{
uint8_t i;
SI4432_log(SI4432_Sel);
SI4432_log(val);
for (i = 0; i < 8; i++) {
if (val & (1 << (7 - i)))
SPI2_SDI_HIGH;
else
SPI2_SDI_LOW;
// chThdSleepMicroseconds(PE4302_DELAY);
SPI2_CLK_HIGH;
// chThdSleepMicroseconds(PE4302_DELAY);
SPI2_CLK_LOW;
// chThdSleepMicroseconds(PE4302_DELAY);
}
}
#endif
static unsigned char old_attenuation = 255;
bool PE4302_Write_Byte(unsigned char DATA )
{
if (old_attenuation == DATA)
return false;
// chThdSleepMicroseconds(PE4302_DELAY);
// SPI2_CLK_LOW;
// chThdSleepMicroseconds(PE4302_DELAY);
// PE4302_shiftOut(DATA);
shiftOut(DATA);
// chThdSleepMicroseconds(PE4302_DELAY);
CS_PE_HIGH;
// chThdSleepMicroseconds(PE4302_DELAY);
CS_PE_LOW;
// chThdSleepMicroseconds(PE4302_DELAY);
return true;
}
#endif
#if 0
//-----------------SI4432 dummy------------------
void SI4432_Write_Byte(unsigned char ADR, unsigned char DATA ) {}
unsigned char SI4432_Read_Byte(unsigned char ADR) {return ADR;}
float set_rbw(float WISH) {return (WISH > 600.0?600: (WISH<3.0?3:WISH));}
void set_calibration_freq(int p) {}
void SI4432_Set_Frequency(long f) {}
void PE4302_Write_Byte(unsigned char DATA ) {}
void PE4302_init(void) {}
#endif
#ifdef __SIMULATION__
unsigned long seed = 123456789;
extern float actual_rbw;
float myfrand(void)
{
seed = (unsigned int) (1103515245 * seed + 12345) ;