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misc fixes.

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shit in place to start implementing GPU shit.
GPL headers added before it's too late. (TODO: put actual GPL license in the repo)
also added URL that doesn't exist yet but is reserved.
This commit is contained in:
StapleButter
2016-12-05 18:02:29 +01:00
parent 343797f47d
commit 8c8c78cf83
22 changed files with 443 additions and 4 deletions
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48
SPI.cpp
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@ -1,3 +1,21 @@
/*
Copyright 2016-2017 StapleButter
This file is part of melonDS.
melonDS 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.
melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include "NDS.h"
#include "SPI.h"
@ -14,6 +32,7 @@ u8 CurCmd;
u32 DataPos;
u8 Data;
u8 StatusReg;
u32 Addr;
void Init()
@ -38,6 +57,7 @@ void Reset()
Hold = 0;
CurCmd = 0;
Data = 0;
StatusReg = 0x00;
}
u8 Read()
@ -56,6 +76,7 @@ void Write(u8 val, u32 hold)
{
CurCmd = val;
Hold = 1;
Data = 0;
DataPos = 1;
Addr = 0;
printf("firmware SPI command %02X\n", CurCmd);
@ -88,6 +109,33 @@ void Write(u8 val, u32 hold)
}
break;
case 0x04: // write disable
StatusReg &= ~(1<<1);
Data = 0;
break;
case 0x05: // read status reg
Data = StatusReg;
break;
case 0x06: // write enable
StatusReg |= (1<<1);
Data = 0;
break;
case 0x9F: // read JEDEC ID
{
switch (DataPos)
{
case 1: Data = 0x20; break;
case 2: Data = 0x40; break;
case 3: Data = 0x12; break;
default: Data = 0; break;
}
DataPos++;
}
break;
default:
printf("unknown firmware SPI command %02X\n", CurCmd);
break;