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* some basic BG display code

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* basic, frozen-in-time RTC
* power management device
This commit is contained in:
StapleButter
2017-01-20 01:18:30 +01:00
parent d7c1d2a2cd
commit 3e5e8f60c4
8 changed files with 460 additions and 18 deletions
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81
SPI.cpp
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@ -17,6 +17,7 @@
*/
#include <stdio.h>
#include <string.h>
#include "NDS.h"
#include "SPI.h"
@ -185,6 +186,80 @@ void Write(u8 val, u32 hold)
}
namespace SPI_Powerman
{
u32 Hold;
u32 DataPos;
u8 Index;
u8 Data;
u8 Registers[8];
u8 RegMasks[8];
void Init()
{
}
void Reset()
{
Hold = 0;
Index = 0;
Data = 0;
memset(Registers, 0, sizeof(Registers));
memset(RegMasks, 0, sizeof(RegMasks));
Registers[4] = 0x40;
RegMasks[0] = 0x7F;
RegMasks[1] = 0x01;
RegMasks[2] = 0x01;
RegMasks[3] = 0x03;
RegMasks[4] = 0x0F;
}
u8 Read()
{
return Data;
}
void Write(u8 val, u32 hold)
{
if (!hold)
{
Hold = 0;
}
if (hold && (!Hold))
{
Index = val;
Hold = 1;
Data = 0;
DataPos = 1;
return;
}
if (DataPos == 1)
{
if (Index & 0x80)
{
Data = Registers[Index & 0x07];
}
else
{
Registers[Index & 0x07] =
(Registers[Index & 0x07] & ~RegMasks[Index & 0x07]) |
(val & RegMasks[Index & 0x07]);
}
}
else
Data = 0;
}
}
namespace SPI
{
@ -197,6 +272,7 @@ u32 CurDevice;
void Init()
{
SPI_Firmware::Init();
SPI_Powerman::Init();
}
void Reset()
@ -204,6 +280,7 @@ void Reset()
CNT = 0;
SPI_Firmware::Reset();
SPI_Powerman::Reset();
}
@ -224,6 +301,7 @@ u8 ReadData()
switch (CNT & 0x0300)
{
case 0x0000: return SPI_Powerman::Read();
case 0x0100: return SPI_Firmware::Read();
default: return 0;
}
@ -237,8 +315,9 @@ void WriteData(u8 val)
switch (CNT & 0x0300)
{
case 0x0000: SPI_Powerman::Write(val, CNT&(1<<11)); break;
case 0x0100: SPI_Firmware::Write(val, CNT&(1<<11)); break;
default: printf("SPI to unknown device %04X %02X\n", CNT, val); break;
default: break;//printf("SPI to unknown device %04X %02X\n", CNT, val); break;
}
if (CNT & (1<<14))