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/*
* Copyright 2014 Ettus Research LLC
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Welcome to the firmware code for the USRP Octoclock accessory product!
*
* Notes regarding this firmware:
* NOT in M103 compatibility mode
* CKOPT full rail-to-rail
* xtal osc
* 16K CK (16K clock cycles)
* additional delay 65ms for Crystal Oscillator
* slowly rising power
*
* These settings are very conservative. If a lower power oscillator is
* required, change CKOPT to '1' (UNPROGRAMMED).
*
* M103C = [ ]
* WDTON = [ ]
* OCDEN = [ ]
* JTAGEN = [X]
* SPIEN = [X]
* EESAVE = [X]
* BOOTSZ = 4096W_F000
* BOOTRST = [X]
* CKOPT = [X]
* BODLEVEL = 2V7
* BODEN = [ ]
* SUT_CKSEL = EXTHIFXTALRES_16KCK_64MS
*
* EXTENDED = 0xFF (valid)
* HIGH = 0x80 (valid)
* LOW = 0xFF (valid)
*
*/
#include <avr/io.h>
#include <octoclock.h>
void setup_atmel_io_ports(){
/*
* PORT A
*
* pin# Sig Our Functional Name
*
* p51 PA0 CLK_CDCE to U205 pin 24 -- L-->H edge latches MOSI and MISO in CDCE18005
* p50 PA1 CE_CDCE Low = Chip Enabled for SPI comm to U205 pin 25
* p49 PA2 MOSI_CDCE Goes to CDCE18005 - U205 pin 23
* p48 PA3 MISO_CDCE Input Comes from U205 pin 22
* p47 PA4 PD_CDCE Low = Chip is in Power-Down state; is Hi for normal operation U205 pin 12
* p46 PA5 SYNC_CDCE Low = Chip is sync'd with interal dividers; Hi for normal operation U205 pin 14
* p45 PA6 PPS_SEL Low --> PPS_EXT selected; Hi -> PPS_GPS selected; to U203 pin 1
* p44 PA7 gps_lock Input Comes from M9107 - U206 pin 3
*
*/
// /pd_cdcd, /sync_code, /ce need to be 1 (disabled) to start
// all bits are outputs, except PA7 (gps_lock) and PA3 (MISO_CDCE) are inputs
PORTA = Bits_8(00100010);
DDRA = 1<<DDA6 | 1<<DDA5 | 1<<DDA4 | 1<<DDA2 | 1<<DDA1 | 1<<DDA0;
/*
* Port B
*
* pin# Sig Our Functional Name
*
* p10 PB0 Ethernet /SEN
* p11 PB1 Ethernet SCLK
* p12 PB2 Ethernet MOSI
* p13 PB3 Ethernet MISO
* p14 PB4 Not connected, set as output with value 0
* p15 PB5 Ethernet /RESET -- Set to HI for normal use, weak input
* p16 PB6 Ethernet /WOL --- Wake on LAN -- set, weak input
* p17 PB7 Not connected, set as output with value 0
*
*/
PORTB = Bits_8(01100001); // Initial Value is all zeros
DDRB = Bits_8(11110111); // MOSI is an output; the Not Connected pins are also outputs
/*
* Port C
*
* pin# Sig Our Functional Name
*
* p34 PC0 Not connected, set as output with value 0
* p35 PC1 Reference Select Switch INPUT
* p36 PC2 Not connected, set as output with value 0
* p37 PC3 Not connected, set as output with value 0
* p38 PC4 Not connected, set as output with value 0
* p40 PC5 "Top LED" of D103 3-stack of green LEDs
* p41 PC6 "Middle LED"
* p43 PC7 "Bottom LED"
*
*/
PORTC = 0; // Initial Value is all zeros
DDRC = ~( 1<<DDC1 ); // All bits are outputs, except PC1. including the 5 Not Connected bits
/*
* Port D
*
* pin# Sig Our Functional Name
*
* p25 PD0 Ethernet /INT input
* p26 PD1 GPS NMEA bit, (INT1) INPUT
* p27 PD2 GPS Serial Out (RXD) INPUT
* p28 PD3 GPS Serial In (TXD) OUTPUT
* p29 PD4 GPS Present, INPUT hi = Present
* p30 PD5 Not connected, set as output with value 0
* p31 PD6 Not connected, set as output with value 0
* p32 PD7 Not connected, set as output with value 0
*
*/
PORTD = 0; // Initial Value is all zeros
DDRD = 1<<DDD3;
/*
* Port E
*
* pin# Sig Dir Our Functional Name
*
* p2 PE0 In avr_rxd (Also MOSI [PDI] when used for SPI programming of the chip)
* p3 PE1 Out avr_txd (Also MISO [PDO] when used for SPI programming of the chip)
* p4 PE2 In avr_cts
* p5 PE3 Out avr_rts
* p6 PE4 In PPS_GPS
* p7 PE5 In PPS_EXT_n
* p8 PE6 In Not Connected
* p9 PE7 In Not Connected
*
*/
PORTE = 0;
DDRE = 1<<DDE1; // make outputs, set to zero. PE1 is usart0 TXD
/*
* Port F
*
* Split into 2 nibbles; goes to Amp/Filter board to select ENABLE and two bits
* to select band one bit per nibble is not connected.
*
* pin Sig Dir Our Functional Name
*
* p61 PF0 Out J117 pin 3 (J117 pins 1 and 2 are GND)
* p60 PF1 Out J117 pin 4
* p59 PF2 Out J117 pin 5
* p58 PF3 Out J117 pin 6
* p57 PF4 Out J118 pin 3 (J118 pins 1 and 2 are GND)
* p56 PF5 Out J118 pin 4
* p55 PF6 Out J118 pin 5
* p54 PF7 Out J118 pin 6
*
*/
PORTF = 0; // Initial Value is all zeros; be sure ENABLE bits are active high!!!!
DDRF = 0xff; // All bits are outputs
}
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