SRAM Bit banding

[greg_t]

Posted on April 25, 2011 at 11:07

SRAM Bit banding

[Tesla DeLorean]

Posted on May 17, 2011 at 14:32

The bits are lined up a word at a time at 0x22000000

0x22000000 byte 0, bit 0 0x22000004 byte 0, bit 1 .. 0x22000020 byte 1, bit 0 0x22000024 byte 1, bit 1 #define RAM_BASE       0x20000000 #define RAM_BB_BASE    0x22000000 /* Private macro -------------------------------------------------------------*/ #define  Var_ResetBit_BB(VarAddr, BitNumber)    \           (*(vu32 *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 0) #define Var_SetBit_BB(VarAddr, BitNumber)       \           (*(vu32 *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)) = 1) #define Var_GetBit_BB(VarAddr, BitNumber)       \           (*(vu32 *) (RAM_BB_BASE | ((VarAddr - RAM_BASE) << 5) | ((BitNumber) << 2)))