139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/*
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* =====================================================================================
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*
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* ________ .__ __ ________ ____ ________
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* \_____ \ __ __|__| ____ | | __\______ \ _______ _/_ |/ _____/
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* / / \ \| | \ |/ ___\| |/ / | | \_/ __ \ \/ /| / __ \
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* / \_/. \ | / \ \___| < | ` \ ___/\ / | \ |__\ \
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* \_____\ \_/____/|__|\___ >__|_ \/_______ /\___ >\_/ |___|\_____ /
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* \__> \/ \/ \/ \/ \/
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*
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* www.optixx.org
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*
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*
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* Version: 1.0
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* Created: 07/21/2009 03:32:16 PM
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* Author: david@optixx.org
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*
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* =====================================================================================
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*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include <stdlib.h>
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#include "config.h"
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#include "requests.h"
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#include "sram.h"
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#include "info.h"
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#include "irq.h"
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#include "usbdrv.h"
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#include "rle.h"
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#include "loader.h"
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extern usb_transaction_t usb_trans;
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extern const char _rom[] PROGMEM;
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void usb_connect()
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{
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uint8_t i = 0;
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info_P(PSTR("USB init\n"));
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usbDeviceDisconnect(); /* enforce re-enumeration, do this while */
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cli();
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info_P(PSTR("USB disconnect\n"));
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i = 10;
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while (--i) { /* fake USB disconnect for > 250 ms */
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_delay_ms(50);
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}
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led_on();
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usbDeviceConnect();
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info_P(PSTR("USB connect\n"));
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}
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void send_reset()
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{
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info_P(PSTR("Reset SNES\n"));
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cli();
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snes_reset_on();
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snes_reset_lo();
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_delay_ms(2);
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snes_reset_hi();
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snes_reset_off();
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sei();
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}
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void send_irq()
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{
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snes_irq_on();
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snes_irq_lo();
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_delay_us(20);
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snes_irq_hi();
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snes_irq_off();
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}
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void set_rom_mode()
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{
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if (usb_trans.req_bank_size == 0x8000) {
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snes_lorom();
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info_P(PSTR("Set SNES lowrom \n"));
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} else {
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snes_hirom();
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info_P(PSTR("Set SNES hirom \n"));
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}
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}
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void boot_startup_rom(uint16_t init_delay)
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{
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info_P(PSTR("Fetch loader rom\n"));
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info_P(PSTR("Activate AVR bus\n"));
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avr_bus_active();
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info_P(PSTR("IRQ off\n"));
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snes_irq_lo();
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snes_irq_off();
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snes_lorom();
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rle_decode(&_rom, ROM_BUFFER_SIZE, 0x000000);
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info_P(PSTR("\n"));
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#if DO_CRC_CHECK_LOADER
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dump_memory(0x010000 - 0x100, 0x010000);
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uint16_t crc;
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crc = crc_check_bulk_memory((uint32_t)0x000000,0x010000, 0x010000);
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info(PSTR("crc=%x\n"),crc);
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#endif
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snes_irq_lo();
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snes_irq_off();
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snes_hirom();
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snes_wr_disable();
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snes_bus_active();
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info_P(PSTR("Activate SNES bus\n"));
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send_reset();
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_delay_ms(init_delay);
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}
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void banner(){
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uint8_t i;
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for (i=0;i<40;i++)
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info_P(PSTR("\n"));
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info_P(PSTR(" ________ .__ __ ________ ____ ________\n"));
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info_P(PSTR(" \\_____ \\ __ __|__| ____ | | __\\______ \\ _______ _/_ |/ _____/\n"));
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info_P(PSTR(" / / \\ \\| | \\ |/ ___\\| |/ / | | \\_/ __ \\ \\/ /| / __ \\ \n"));
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info_P(PSTR(" / \\_/. \\ | / \\ \\___| < | ` \\ ___/\\ / | \\ |__\\ \\ \n"));
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info_P(PSTR(" \\_____\\ \\_/____/|__|\\___ >__|_ \\/_______ /\\___ >\\_/ |___|\\_____ / \n"));
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info_P(PSTR(" \\__> \\/ \\/ \\/ \\/ \\/ \n"));
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info_P(PSTR("\n"));
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info_P(PSTR(" www.optixx.org\n"));
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info_P(PSTR("\n"));
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info_P(PSTR("System Hw: %s Sw: %s\n"),HW_VERSION,SW_VERSION);
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}
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