void system_set_rom_mode(usb_transaction_t * usb_trans)
{
if (usb_trans->req_bank_size == 0x8000) {
snes_lorom();
my_system.rom_mode = LOROM;
info_P(PSTR("Set SNES lorom \n"));
} else {
snes_hirom();
my_system.rom_mode = HIROM;
info_P(PSTR("Set SNES hirom \n"));
}
}
uint8_t usbFunctionWrite(uint8_t * data, uint8_t len)
{
uint8_t *ptr;
uint8_t i;
if (len > usb_trans.rx_remaining) {
info_P(PSTR
("ERROR:usbFunctionWrite more data than expected remain: %i len: %i\n"),
usb_trans.rx_remaining, len);
len = usb_trans.rx_remaining;
}
if (usb_trans.req_state == REQ_STATUS_BULK_UPLOAD) {
usb_trans.rx_remaining -= len;
debug_P(DEBUG_USB_TRANS,
PSTR
("usbFunctionWrite REQ_STATUS_BULK_UPLOAD addr: 0x%08lx len: %i rx_remaining=%i\n"),
usb_trans.req_addr, len, usb_trans.rx_remaining);
ptr = data;
i = len;
while (i--) {
sram_bulk_write(*ptr++);
sram_bulk_write_next();
}
}
return len;
}
void system_status()
{
info_P(PSTR("\nBus Mode %s\n"), system_status_bus(my_system.bus_mode));
info_P(PSTR("Rom Mode %s\n"), system_status_rom(my_system.rom_mode));
info_P(PSTR("Reset Line %s\n"),
system_status_helper(my_system.reset_line));
info_P(PSTR("IRQ Line %s\n"), system_status_helper(my_system.irq_line));
info_P(PSTR("WR Line %s\n"), system_status_helper(my_system.wr_line));
info_P(PSTR("Reset IRQ %s\n"), system_status_helper(my_system.reset_irq));
info_P(PSTR("SNES Reset 0x%02x\n"), my_system.snes_reset_count);
info_P(PSTR("AVR Reset 0x%02x\n"), my_system.avr_reset_count);
}
void system_send_snes_reset()
{
info_P(PSTR("Reset SNES\n"));
cli();
snes_reset_on();
snes_reset_lo();
_delay_ms(2);
snes_reset_hi();
snes_reset_off();
sei();
my_system.snes_reset_count++;
}
int main(void)
{
#ifndef NO_DEBUG
uart_init();
stdout = &uart_stdout;
banner();
#endif
shared_memory_init();
system_init();
sram_init();
pwm_init();
irq_init();
boot_startup_rom(50);
globals_init();
pwm_stop();
usbInit();
usb_connect();
sei();
while (1) {
system_set_bus_avr();
system_set_wr_disable();
while (usb_trans.req_state != REQ_STATUS_SNES) {
usbPoll();
#if DO_SHELL
#ifndef NO_DEBUG
shell_run();
#endif
#endif
}
#if DO_SHM
shared_memory_write(SHARED_MEM_TX_CMD_TERMINATE, 0);
#endif
#if DO_SHM_SCRATCHPAD
shared_memory_scratchpad_region_tx_restore();
shared_memory_scratchpad_region_rx_restore();
#endif
#if DO_CRC_CHECK
info_P(PSTR("-->CRC Check\n"));
crc_check_bulk_memory(0x000000,
usb_trans.req_bank_size * usb_trans.req_bank_cnt,
usb_trans.req_bank_size);
#endif
system_set_rom_mode(&usb_trans);
system_set_wr_disable();
system_set_bus_snes();
system_send_snes_reset();
irq_stop();
while ((usb_trans.req_state != REQ_STATUS_AVR)) {
usbPoll();
#if DO_SHELL
#ifndef NO_DEBUG
shell_run();
#endif
#endif
}
info_P(PSTR("-->Switch TO AVR\n"));
shared_memory_init();
irq_init();
if (usb_trans.loader_enabled) {
boot_startup_rom(50);
} else {
system_set_bus_avr();
system_send_snes_reset();
}
globals_init();
}
return 0;
}
void system_set_rom_hirom()
{
snes_hirom();
my_system.rom_mode = HIROM;
info_P(PSTR("Set SNES hirom \n"));
}
void system_set_rom_lorom()
{
snes_lorom();
my_system.rom_mode = LOROM;
info_P(PSTR("Set SNES lorom \n"));
}
void system_set_bus_snes()
{
snes_bus_active();
my_system.bus_mode = MODE_SNES;
info_P(PSTR("Activate SNES bus\n"));
}
void system_set_wr_enable()
{
snes_wr_enable();
my_system.wr_line = WR_ENABLE;
info_P(PSTR("Enable SNES WR\n"));
}
void system_set_wr_disable()
{
snes_wr_disable();
my_system.wr_line = WR_DISABLE;
info_P(PSTR("Disable SNES WR\n"));
}
void system_set_bus_avr()
{
avr_bus_active();
info_P(PSTR("Activate AVR bus\n"));
my_system.bus_mode = MODE_AVR;
}
