diff options
| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-05-01 16:03:18 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2007-05-01 16:03:18 +0000 |
| commit | 4735dd8fe9a5bb501b6a125f18ad802293ebd45e (patch) | |
| tree | 870f26497b2249170e152ad0efcc087b814467cd /ezdop/src/firmware/dopctrl.c | |
| parent | 67c488c82e14fe28f9db001116a1319ede4b8c8f (diff) | |
Moved obsolete component into limbo.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@5206 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'ezdop/src/firmware/dopctrl.c')
| -rw-r--r-- | ezdop/src/firmware/dopctrl.c | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/ezdop/src/firmware/dopctrl.c b/ezdop/src/firmware/dopctrl.c deleted file mode 100644 index a9419da6e7..0000000000 --- a/ezdop/src/firmware/dopctrl.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * AE6HO EZ-Doppler firmware for onboard ATmega8 microcontroller - * Copyright 2006 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio 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 2, or (at your option) - * any later version. - * - * GNU Radio 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. - */ - -/* - * ARCHITECTURE - * - * Timer0 is 8000 Hz time base - * PORTD.2 through PORTD.5 are doppler antenna array element enables. - * PORTB.0 is a diagnostic LED, set low to light up - * ADC7 is audio input - * ADC6 is RSSI input - not yet used - * - */ - -#include <avr/io.h> -#include <avr/interrupt.h> -#include <compat/deprecated.h> // for timer_enable_int -#include "dopctrl.h" - -#define LED 0 -#define turn_off_led() PORTB |= _BV(LED); -#define turn_on_led() PORTB &= ~_BV(LED); - -#define ANT1 _BV(2) -#define ANT2 _BV(3) -#define ANT3 _BV(4) -#define ANT4 _BV(5) -#define ANTMASK ANT1|ANT2|ANT3|ANT4 - -#define ADCAIN 7 -#define BAUDRATE 250000 - -/* Assume these are all set to zero in startup code */ - -uint8_t rotate; /* Flag to indicate antennas should rotate or not */ -uint8_t streaming; /* Flag to indicate continuous sampling */ -uint8_t antennas; /* Holds shadow copy of PORTD antennas */ -uint8_t speed; /* Holds samples per phase increment */ -uint8_t phase; /* Holds rotation phase (measured in samples */ - -uint8_t audio_hi; /* High byte of ADC sample of audio */ -uint8_t audio_lo; /* Low byte of ADC sample of audio */ - -uint8_t rx; /* Temporary holds received byte from USART */ -uint8_t command; /* Temporary to hold command when getting operand */ -uint8_t cmdbyte; /* Tracks bytes received in multi-byte commands */ - -int main(void) -{ - /* Diagnostic port setup */ - DDRB = _BV(LED); /* PB0 is output */ - turn_off_led(); - - /* Antenna control port setup */ - speed = 4; /* Todo: read from EEPROM */ - antennas = ANT1; /* Start with antenna #1 */ - PORTD = antennas; /* Set port value */ - DDRD = ANTMASK; /* Set antenna enables as PORTD outputs */ - - /* ADC port setup */ - ADMUX = _BV(REFS0)|ADCAIN; /* AVCC is reference, use ADC for audio input (ADC7) */ - ADCSRA = _BV(ADEN)|_BV(ADIE)|0x07; /* Enable converter, prescale by 128, enable ADC interrupt */ - - /* USART port setup*/ - UCSRA = 0; /* Normal asynchronous mode */ - UCSRB = _BV(TXEN)|_BV(RXEN)|_BV(RXCIE); /* Enable transmitter and receiver, and receiver interrupts */ - UCSRC = _BV(URSEL)|_BV(UCSZ1)|_BV(UCSZ0); /* 8N1 format */ - UBRRH = 0; /* Set baud rate prescaler to 3 */ - UBRRL = 3; /* To get 250000 bps */ - - /* Set up 8000 Hz time base */ - timer_enable_int(_BV(TOIE0)); /* Turn on Timer0 output overflow interrupt */ - TCCR0 = _BV(CS01); /* Clock Timer0 from CLK/8 */ - - sei(); /* Let 'er rip! */ - return 0; -} - -/* Timer0 overflow interrupt handler - * - * Creates 8000 Hz time base, or 125us budget - * - */ -SIGNAL(SIG_OVERFLOW0) -{ - /* Reload Timer0 samples to 8, results in 8000 Hz overflow interrupt */ - TCNT0 = 0x08; - - if (streaming) { - /* Kick-off an audio sample conversion, will interrupt 104us later */ - ADCSRA |= _BV(ADSC); - - /* Write the first byte of previous sample and enable UDRIE */ - UDR = audio_lo; - UCSRB |= _BV(UDRIE); - } - - if (!rotate) /* Skip rotating antenna if not started */ - return; - - /* Increment antenna phase and see if antenna need to be rotated */ - if (++phase == speed) { - phase = 0; - - /* Sequence antenna array elements */ - antennas >>= 1; - antennas &= ANTMASK; - - if (!antennas) - antennas = ANT4; - PORTD = antennas; - } -} - -/* ADC conversion complete interrupt handler - * - * Read value and store. Assume prior sample has been handled. - * - */ -SIGNAL(SIG_ADC) -{ - audio_lo = ADCL; - audio_hi = ADCH; -} - -/* USART data transmit holding register empty interrupt handler - * - * First byte is always sent from timer interrupt - * So second byte gets sent here with UDRIE disabled - * - */ -SIGNAL(SIG_UART_DATA) -{ - /* Write second byte of previous sample and disable UDRIE */ - UDR = audio_hi | (antennas << 2); - UCSRB &= ~_BV(UDRIE); -} - -/* USART receive complete interrupt handler - * - * Received bytes are commands, with one or two bytes of operands following - * - */ -SIGNAL(SIG_UART_RECV) -{ - rx = UDR; - - if (cmdbyte == 0) { - if (rx == EZDOP_CMD_ROTATE) /* Start rotation */ - rotate = 1; - else if (rx == EZDOP_CMD_STOP) /* Stop rotation */ - rotate = 0; - else if (rx == EZDOP_CMD_RATE) { /* Set rotation rate */ - command = rx; - cmdbyte = 1; - } - else if (rx == EZDOP_CMD_STREAM) /* Stream audio samples */ - streaming = 1; - else if (rx == EZDOP_CMD_STROFF) /* Stop streaming */ - streaming = 0; - else - turn_on_led(); /* Unknown command */ - } - else if (cmdbyte == 1) { - if (command == EZDOP_CMD_RATE) { /* Operand is number of samples per phase increment */ - speed = rx; - cmdbyte = 0; - } - else - turn_on_led(); /* Bogus command state */ - } - else - turn_on_led(); /* Bogus command state */ -} |