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main6.c
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/*
wearable microphone jammer
- ATTINY85/45/25 chip & AVR-GCC compiler version
- the code is less than 2048 long
CONNECTION
--------
AD9833 PCB to ATTINY85:
FDATA --> PB1 (MOSI / D1 )
SCLK --> PB2 (SCK)
FSYNC --> PB3 (SS / CS )
DGND --> GND
VCC --> VCC
AD9833 PCB to PAM 8403 / TPA3116D2
AOUT --> LEFT AUDIO IN + RIGHT AUDIO IN
AGND --> AUDIO GND
REMEMBER TO CONNECT AD9833 TO VCC/5V AND GND
*/
#include <stdio.h>
#include <stdint.h>
#include <util/delay.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/delay.h>
// default ATTINY85 internal clock speed is only 1MHz ( 8 MHz DIV 8 )
// we are using 16MHz here
#define F_CPU 16000000
/**
* SPI pins - definition for ATTINY85
*/
#define SPI_DDR_PORT DDRB
#define USCK_DD_PIN DDB2
#define DO_DD_PIN DDB1
#define DI_DD_PIN DDB0
/** \name AD9833 waveform output modes
* Parameters of \ref ad9833_set_mode()
* @{
*/
#define AD_OFF 0
#define AD_TRIANGLE 1
#define AD_SQUARE 2
#define AD_SINE 3
/**@}*/
/** \name AD9833 command register bits
* @{
*/
#define AD_B28 13
#define AD_HLB 12
#define AD_FSELECT 11
#define AD_PSELECT 10
#define AD_RESET 8
#define AD_SLEEP1 7
#define AD_SLEEP12 6
#define AD_OPBITEN 5
#define AD_DIV2 3
#define AD_MODE 1
/** @}*/
/** \name AD9833 register addresses
* @{
*/
#define AD_FREQ0 (1<<14)
#define AD_FREQ1 (1<<15)
#define AD_PHASE0 (3<<14)
#define AD_PHASE1 ((3<<14)|(1<<13))
/** @}*/
/** \name AD9833 calculation macros
* @{ */
#define AD_F_MCLK 25000000 ///<Clock speed of the ad9833 reference clock
#define AD_2POW28 268435456 ///<used in calculating output freq
/** Macro that calculates the value for a ad9833 frequency register from a frequency */
#define AD_FREQ_CALC(freq) (uint32_t)(((double)AD_2POW28/(double)AD_F_MCLK*freq)*4)
/** Macro that calculates value for Timer1 output compare from a frequency*/
#define AD_MOD_FREQ_CALC(freq) (F_CPU/(64*(uint32_t)freq))
/** Macro that calculates the value for a ad9833 phase register from a phase in degrees */
#define AD_PHASE_CALC(phase_deg) (uint16_t)((512*phase_deg)/45)
/** @} */
/** Struct that holds all the configuration it's initialized as a global variable
* in the ad9833.c file */
typedef struct {
float freq[2]; ///<Holds the frequencies of
float phase[2];
float mod_freq;
uint8_t freq_out;
uint8_t phase_out;
uint8_t mode;
uint16_t command_reg;
} ad9833_settings_t;
ad9833_settings_t ad_settings; ///<This is used to store all settings.
// randomized infrasound 400 values to swipe between 24kHz - 26kHz
const uint8_t randomized[] PROGMEM =
{
/*
17,21,23,22,25,9,10,9,6,13,20,12,11,10,20,13,19,16,9,15,20,15,5,6,
25,11,13,10,6,23,12,25,21,11,20,7,6,22,9,25,20,24,19,13,15,14,20,
9,5,19,13,17,13,13,25,7,20,21,20,17,21,17,13,9,24,20,20,16,21,9,5,
23,9,11,6,9,16,21,21,24,8,24,24,24,10,9,23,13,9,14,24,25,24,18,6,5,
17,22,21,24,20,16,16,25,15,21,21,11,6,25,15,11,18,18,20,25,13,18,
11,7,13,16,13,5,19,6,7,17,24,6,10,11,13,24,23,21,7,23,14,17,9,9,17,
16,13,13,6,21,19,22,10,8,5,10,22,24,23,15,5,7,17,20,6,7,14,20,10,
25,19,13,5,20,9,24,21,11,6,18,6,13,19,15,18,7,17,21,12,24,21,20,11,
19,20,19,13,19,17,15,18,18,6,20,20,6,20,8,14,14,19,10,20,15,18,6,
12,24,14,5,17,12,25,13,16,8,7,19,21,20,18,11,7,12,17,21,10,17,6,9,
23,14,24,19,12,19,11,18,23,14,20,10,8,10,16,18,12,14,25,12,17,21,
25,21,5,13,11,6,5,12,18,17,18,21,8,16,8,12,22,20,17,12,19,17,24,
14,17,20,22,24,19,16,13,7,21,21,17,5,15,10,23,25,6,17,11,11,15,
13,5,13,11,25,9,11,18,14,20,9,15,10,25,13,17,16,5,19,14,24,15,
19,7,15,18,13,10,21,10,15,19,24,18,19,16,15,19,14,15,23,24,7,11,
9,10,24,11,19,10,12,13,11,14,5,15,13,17,25,9,21,7,20,12,15,10,5,
14,10,10,16,23,20,11,18,17,7,8,11,23,9,12,8,13,14,6,20,18,20,24,
25,21,17,12,7,19,24,12,18,6,13,8,9,19,10,7,19,15,7,24,21,19,16,14,
8,23,20,20,18,24,25,21,10,17,19,21,18,16,21,14,19,15,18,8,23,17,13,
21,7,20,14,11,10,8,11,9,24,18,19,25,12,12,8,19,17,17,24,5,10,11,11,
11,25,12,19,13,6,9,21,10,12,8,14,5,7,22,21,7,15,8,22,18,17,6,16,7
*/
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,18,17,16,15,
14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
16,17,18,19,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,
4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,18,17,16,15,14,13,
12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,
18,19,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,
6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,18,17,16,15,14,13,12,
11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,
18,19,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,
6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,18,17,16,15,14,13,12,
11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,
18,19,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,
6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,19,18,17,16,15,14,13,12,
11,10,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,
18,19,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,2,3,4,
5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20
};
// ***********************************
// ******* SPI SPECIFIC ROUTINES
// ***********************************
/**
* init
*
* SPI initialization
*/
void spi_init()
{
// ATTINY85 pin assignments
// SPI_SS = PORTB3,
// SPI_MOSI = PORTB1
// SPI_MISO = PORTB0,
// SPI_SCK = PORTB2
// Configure SPI pins
//pinMode(SPI_SS, OUTPUT);
//pinMode(SPI_MOSI, OUTPUT);
//pinMode(SPI_MISO, INPUT);
//pinMode(SPI_SCK, OUTPUT);
//digitalWrite(SPI_SCK, HIGH);
//digitalWrite(SPI_MOSI, LOW);
//digitalWrite(SPI_SS, HIGH);
DDRB |= _BV(3); // configure output for SPI CS SS
USICR &= ~(_BV(USISIE) | _BV(USIOIE) | _BV(USIWM1));
USICR |= _BV(USIWM0) | _BV(USICS1) | _BV(USICLK);
SPI_DDR_PORT |= _BV(USCK_DD_PIN); // set the USCK pin as output
SPI_DDR_PORT |= _BV(DO_DD_PIN); // set the DO pin as output
SPI_DDR_PORT &= ~_BV(DI_DD_PIN); // set the DI pin as input
// spi mode 1
USICR |= _BV(USICS0);
}
/**
*
* Send uint8_t via SPI
*
* 'value' Value to be sent
*
* Return:
* Response received from SPI slave
*/
uint8_t spi_send(uint8_t value)
{
USIDR = value;
USISR = _BV(USIOIF); // clear counter and counter overflow interrupt flag
while ( !(USISR & _BV(USIOIF)) ) USICR |= _BV(USITC);
return USIDR;
}
// ----------------------------------------------------------------
// AD8933 programmable signal generator specific routines
// ----------------------------------------------------------------
/**
* a wrapper function for sending 16-bit SPI packets.
* \param packet 16-bit value to be sent over SPI.
*/
static inline void ad9833_send(uint16_t packet)
{
PORTB |= _BV(2); // set PIN PB2 : SCLK HIGH
PORTB &= ~_BV(3); // set PIN PB3 : SS / CS LOW to write over SPI
//delayMicroseconds(2); // Some delay may be needed
// TODO: Are we running at the highest clock rate?
spi_send((uint8_t)(packet>>8)); // Transmit 16 bits 8 bits at a time
spi_send((uint8_t)packet);
PORTB |= _BV(3); // set PIN PB3 : SS / CS HIGH again
PORTB |= _BV(2); // set PIN PB2 : SCLK HIGH
}
/**
* Initializes the AD9833 and the relevant variables.
*/
void ad9833_init(void)
{
// set half awake state
ad9833_send((1<<AD_SLEEP12)|(1<<AD_RESET));
ad_settings.command_reg |= (1<<AD_SLEEP12);
//set some nice default values
ad9833_set_frequency(0, 0);
ad9833_set_frequency(1, 0);
ad9833_set_phase(0, 0);
ad9833_set_phase(1, 0);
ad9833_set_freq_out(0);
ad9833_set_phase_out(0);
}
/**
* Sets the ad9833 output waveform to the one given as a parameter.
* \param mode possible values:
* - AD_OFF
* - AD_TRIANGLE
* - AD_SQUARE
* - AD_SINE
*/
void ad9833_set_mode(uint8_t mode){
ad_settings.mode = mode;
switch (mode){
case AD_OFF:
ad_settings.command_reg |= (1<<AD_SLEEP12);
ad_settings.command_reg |= (1<<AD_SLEEP1);
break;
case AD_TRIANGLE:
ad_settings.command_reg &= ~(1<<AD_OPBITEN);
ad_settings.command_reg |= (1<<AD_MODE);
ad_settings.command_reg &= ~(1<<AD_SLEEP12);
ad_settings.command_reg &= ~(1<<AD_SLEEP1);
break;
case AD_SQUARE:
ad_settings.command_reg |= (1<<AD_OPBITEN);
ad_settings.command_reg &= ~(1<<AD_MODE);
ad_settings.command_reg |= (1<<AD_DIV2);
ad_settings.command_reg &= ~(1<<AD_SLEEP12);
ad_settings.command_reg &= ~(1<<AD_SLEEP1);
break;
case AD_SINE:
ad_settings.command_reg &= ~(1<<AD_OPBITEN);
ad_settings.command_reg &= ~(1<<AD_MODE);
ad_settings.command_reg &= ~(1<<AD_SLEEP12);
ad_settings.command_reg &= ~(1<<AD_SLEEP1);
break;
}
ad9833_send(ad_settings.command_reg);
}
/**
* Selects which frequency register is used to generate the output.
* Also used to select FSK.
* \param phase_out possible values:
* - 0 = use phase register 0
* - 1 = use phase register 1
* - 2 = PSK
*/
void ad9833_set_freq_out(uint8_t freq_out){
ad_settings.freq_out = freq_out;
switch (freq_out){
case 0:
ad_settings.command_reg &= ~(1<<AD_FSELECT);
break;
case 1:
ad_settings.command_reg |= (1<<AD_FSELECT);
break;
case 2:
//TODO
break;
}
ad9833_send(ad_settings.command_reg);
}
/**
* sets the desired ad9833 internal phase register to a value that
* produces the desired phase.
*
* \param reg the desired phase register to be manipulated, either 0 or 1
* \param phase the desired phase
*/
void ad9833_set_phase(uint8_t reg, double phase){
uint16_t reg_reg; //probably should be renamed...
if (reg==1)
reg_reg = AD_PHASE1;
else
reg_reg = AD_PHASE0;
ad_settings.phase[reg] = phase;
ad9833_send(reg_reg | AD_PHASE_CALC(ad_settings.phase[reg]));
}
/**
* Selects which phase register is used to generate the output
* Also used to select PSK
* \param phase_out possible values:
* - 0 = use phase register 0
* - 1 = use phase register 1
* - 2 = PSK
*/
void ad9833_set_phase_out(uint8_t phase_out){
ad_settings.phase_out = phase_out;
switch (phase_out){
case 0:
ad_settings.command_reg &= ~(1<<AD_PSELECT);
break;
case 1:
ad_settings.command_reg |= (1<<AD_PSELECT);
break;
case 2:
//TODO
break;
}
ad9833_send(ad_settings.command_reg);
}
/**
* sets the desired ad9833 internal frequency register to a value that
* produces the desired frequency.
*
* \param reg the desired frequency register to be manipulated, either 0 or 1
* \param freq the desired frequency
*/
void ad9833_set_frequency(uint8_t reg, double freq){
uint32_t freq_reg;
uint16_t reg_reg; //probably should be renamed...
freq_reg = AD_FREQ_CALC(freq);
ad_settings.freq[reg] = freq;
if (reg==1)
reg_reg = AD_FREQ1;
else
reg_reg = AD_FREQ0;
ad9833_send((1<<AD_B28) | ad_settings.command_reg);
ad9833_send(reg_reg | (0x3FFF&(uint16_t)(freq_reg>>2 )));
ad9833_send(reg_reg | (0x3FFF&(uint16_t)(freq_reg>>16)));
}
// -----------------------------------------------------------------------
// MAIN CODE OF THE JAMMER
// -----------------------------------------------------------------------
void main()
{
uint16_t i,j, sequence ; // for noise and delay generation
//initializing SPI
spi_init();
// initializing AD9833 generator
// _delay_ms(100);
// Delay 1 600 000 cycles
// 100ms at 16 MHz
asm volatile (
" ldi r18, 9 \n"
" ldi r19, 30 \n"
" ldi r20, 229 \n"
"1: dec r20 \n"
" brne 1b \n"
" dec r19 \n"
" brne 1b \n"
" dec r18 \n"
" brne 1b \n"
" nop \n"
);
// now initialize the chip
ad9833_init();
// _delay_ms(15);
// Delay 240 000 cycles
// 15ms at 16 MHz
asm volatile (
" ldi r18, 2 \n"
" ldi r19, 56 \n"
" ldi r20, 174 \n"
"1: dec r20 \n"
" brne 1b \n"
" dec r19 \n"
" brne 1b \n"
" dec r18 \n"
" brne 1b \n"
);
//set gen to SQUARE initially
// you may experiment with other types AD_TRIANGLE or AD_SINE
ad9833_set_mode(AD_SQUARE);
ad9833_set_frequency(0, 26000);
while (1)
{
// generating 20Hz INFRASOUND over 25kHZ ULTRASOUND CARRIER
sequence = 0;
for(i=26000; i>24000; i=i - pgm_read_byte(randomized + sequence), sequence++)
{
ad9833_set_frequency(0, (double)i );
};
sequence = 0;
for(i=24000; i<26000; i=i + pgm_read_byte(randomized + sequence), sequence++ )
{
ad9833_set_frequency(0, (double)i );
};
};
}