Calculating the bus address ath the slave bus interface

[Suhyun]

Hi, I wanted to know calculating the bus address.

[information of register in IP-XACT]
 - base address       : 0x40000
 - address offset     : 1
 - address unit bits : 32
 - salve.bitsInLau    : 8

 memory_map_bit_address = bit_number_in_address_block + addressBlock.baseAddress x memoryMap.addressUnitBits
                                                  = (1 + 0x40000) * 32
                                                  = (1 + 262,144)*32
                                                 = 8,388,640
slave_bus_address = memory_map_bit_address  / slave.bitsInLau
                                   = 8,388,640 / 8
                                   = 1,048,580
                                   = 0x100004

Q1) In this case, to access the register, I use the address "0x10004" is it right?

If value of salve.bitsInLau is "32",slave_bus_address = memory_map_bit_address  / slave.bitsInLau
                                   = 8,388,640 / 32
                                   = 262,145
                                   = 0x4001

Q2) In this case, to access the register, I use the address "0x4001" is it right?

 

Thanks & regards,

Suhyun

 

 

[kock]

Hello Suhyun,

Yes you are right on Q1 and Q2. On Q2, you miss one zero. It should be 0x40001 rather than 0x4001.

Best regards,
Erwin

[Suhyun]

Hello Erwin,

Thanks for your answer.