The following are defined:
#define SRAM_BASE 0x20000000
#define BITBAND_SRAM_BASE 0x22000000
#define BITBAND_SRAM(addr,bit_no)((BITBAND_SRAM_BASE+(addr-SRAM_BASE)*32+(bit_no*4)))
#define SRAM_ADDR 0x2000FFFF // SRAM memory location
Which statement would set SRAM location at 0x2000.FFFF, bit 2 to 1 through its bit-band alias.

Question

The following are defined:

#define SRAM_BASE 0x20000000

#define BITBAND_SRAM_BASE 0x22000000

#define BITBAND_SRAM(addr,bit_no)((BITBAND_SRAM_BASE+(addr-SRAM_BASE)*32+(bit_no*4)))

#define SRAM_ADDR 0x2000FFFF // SRAM memory location

Which statement would set SRAM location at 0x2000.FFFF, bit 2 to 1 through its bit-band alias.

Answer

b.  SET_SRAM_B2() (*((volatile unsigned int *)(BITBAND_SRAM(SRAM_ADDR,2))) = 1)

Answer

a.  SET_SRAM_B2() (*((volatile unsigned int *)(BITBAND_SRAM(SRAM_ADDR,2))) = 2)

Answer

d.  SET_SRAM_B2() (*((volatile unsigned int *)(BITBAND_SRAM(SRAM_ADDR,2))) = 0)

Answer

c.  SET_SRAM_B2() (*((volatile unsigned int *)(BITBAND_SRAM(SRAM_ADDR,2))) = 1<<2)

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