piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2025-07-21 21:31:00 -06:00
Code Issues Packages Projects Releases Wiki Activity

uh oh! it's getting further

Browse Source 
(also CodeBlocks is fucking dumb)
This commit is contained in:
StapleButter
2017-01-16 04:47:37 +01:00
parent af05333290
commit 8c2f785a0f
9 changed files with 194 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
SPI.cpp
View File

@ -35,6 +35,39 @@ u8 Data;
u8 StatusReg;
u32 Addr;
u16 CRC16(u8* data, u32 len, u32 start)
{
u16 blarg[8] = {0xC0C1, 0xC181, 0xC301, 0xC601, 0xCC01, 0xD801, 0xF001, 0xA001};
for (u32 i = 0; i < len; i++)
{
start ^= data[i];
for (int j = 0; j < 8; j++)
{
if (start & 0x1)
{
start >>= 1;
start ^= (blarg[j] << (7-j));
}
else
start >>= 1;
}
}
return start & 0xFFFF;
}
bool VerifyCRC16(u32 start, u32 offset, u32 len, u32 crcoffset)
{
u16 crc_stored = *(u16*)&Firmware[crcoffset];
u16 crc_calced = CRC16(&Firmware[offset], len, start);
//printf("%04X vs %04X\n", crc_stored, crc_calced);
return (crc_stored == crc_calced);
}
void Init()
{
Firmware = NULL;
@ -54,6 +87,14 @@ void Reset()
fclose(f);
// verify shit
printf("FW: WIFI CRC16 = %s\n", VerifyCRC16(0x0000, 0x2C, *(u16*)&Firmware[0x2C], 0x2A)?"GOOD":"BAD");
printf("FW: AP1 CRC16 = %s\n", VerifyCRC16(0x0000, 0x3FA00, 0xFE, 0x3FAFE)?"GOOD":"BAD");
printf("FW: AP2 CRC16 = %s\n", VerifyCRC16(0x0000, 0x3FB00, 0xFE, 0x3FBFE)?"GOOD":"BAD");
printf("FW: AP3 CRC16 = %s\n", VerifyCRC16(0x0000, 0x3FC00, 0xFE, 0x3FCFE)?"GOOD":"BAD");
printf("FW: USER0 CRC16 = %s\n", VerifyCRC16(0xFFFF, 0x3FE00, 0x70, 0x3FE72)?"GOOD":"BAD");
printf("FW: USER1 CRC16 = %s\n", VerifyCRC16(0xFFFF, 0x3FF00, 0x70, 0x3FF72)?"GOOD":"BAD");
Hold = 0;
CurCmd = 0;
Data = 0;