diff options
Diffstat (limited to 'firmware/octoclock/octoclock_r4/octoclock_r4_main.c')
| -rw-r--r-- | firmware/octoclock/octoclock_r4/octoclock_r4_main.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/firmware/octoclock/octoclock_r4/octoclock_r4_main.c b/firmware/octoclock/octoclock_r4/octoclock_r4_main.c new file mode 100644 index 000000000..f80c7d188 --- /dev/null +++ b/firmware/octoclock/octoclock_r4/octoclock_r4_main.c @@ -0,0 +1,158 @@ +/* + * Copyright 2013-2014 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 + * persistent EEPROM + * + * 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 = [ ] + * CKOPT = [X] + * BODLEVEL = 2V7 + * BODEN = [ ] + * SUT_CKSEL = EXTHIFXTALRES_16KCK_64MS + * + * EXTENDED = 0xFF (valid) + * HIGH = 0x81 (valid) + * LOW = 0xFF (valid) + * + */ + +#include <string.h> +#include <stdint.h> +#include <stdbool.h> + +#include <avr/eeprom.h> +#include <avr/io.h> + +#include <octoclock.h> +#include <clkdist.h> +#include <debug.h> +#include <state.h> +#include <network.h> +#include <usart.h> +#include <gpsdo.h> +#include <net/enc28j60.h> +#include <net/udp_handlers.h> + +/******************************************************************************* +* Main Routine +*******************************************************************************/ + +int main(void){ + + #ifdef DEBUG + asm("cli"); + #else + asm("sei"); + #endif + + bool old_global_ext_ref_is_present = false; + switch_pos_t old_switch_pos, current_switch_pos; + + setup_atmel_io_ports(); + + network_init(); + init_udp_listeners(); + register_udp_listener(OCTOCLOCK_UDP_CTRL_PORT, handle_udp_ctrl_packet); + register_udp_listener(OCTOCLOCK_UDP_GPSDO_PORT, handle_udp_gpsdo_packet); + + DEBUG_INIT(); // Does nothing when not in debug mode + usart_init(); + + //Set initial ClkDist and front panel settings + led(Middle,true); + setup_TI_CDCE18005(Primary_GPS); // 10 MHz from Internal Source + + led(Top,true); + PORTA |= (1<<PA6); // PPS from Internal source + + /* + * DO THIS FOREVER: + * + * get_switch_state + * + * if SWITCH_CHANGED: + * + * if PREFER_INTERNAL: + * if INTERNAL_PRESENT do_internal + * else if EXTERNAL_PRESENT do_external + * else LEDs OFF + * + * if PREFER_EXTERNAL: + * if EXTERNAL_PRESENT do_external + * else if INTERNAL_PRESENT do_internal + * else LEDs OFF + * + * check Ethernet port for incoming packets + * + * if packets seen: + * pass to appropriate handler + * + * check if told to monitor GPSDO output + * + * if send flag is set: + * check if interrupt routine has filled buffer with full sentence + * if so, send to host (last machine to use this port) + */ + + check_what_is_present(); + old_global_ext_ref_is_present = !global_ext_ref_is_present; + old_switch_pos = (get_switch_pos() == UP) ? DOWN : UP; + + // Because down below, we use this to get state swap So we arbitrarily set + // the PREVIOUS state to be the "other" state so that, below, we trigger + // what happens when the switch changes This first "change" is therefore + // artificial to keep the logic, below, cleaner + while(true) { + // Set "global_ext_ref_is_present" and "global_gps_present" + check_what_is_present(); + + current_switch_pos = get_switch_pos(); + + if( (current_switch_pos != old_switch_pos) || + (global_ext_ref_is_present != old_global_ext_ref_is_present) ) { + + old_switch_pos = current_switch_pos; + old_global_ext_ref_is_present = global_ext_ref_is_present; + + if(current_switch_pos == UP) prefer_internal(); + else prefer_external(); + } + + //With OctoClock state verified, pass raw packet to handlers for processing + size_t recv_len = enc28j60PacketReceive(512, buf_in); + if(recv_len > 0) handle_eth_packet(recv_len); + } +} |