Subversion Repositories openfire2

Hint:

Address from the code side (if you want to know physical address >> 2)

Bit ordering:  0=MSB --> 31=LSB

I/O PORTS

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ADDRESS                 READ                            WRITE

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SP3SK GPIO: **ATTENTION** USE ALWAYS WORD (32BIT) WRITE DUE TO NOT BYTE SELECT LOGIC

0x0800_0000             31..24=segments_n               31..24=segments_n

0x0800_0001(r)          23..20=drivers_n                23..20=drivers_n

0x0800_0002(r)          19..16=pushbuttons

0x0800_0003(r)          15.. 8=leds                     15..8 =leds

                         7.. 0=switches

UARTS STATUS REGISTER:

0x0800_0004             24=rx1_data_present

                        25=rx1_half_full

                        26=rx1_full

                        27=tx1_half_full

                        28=tx1_full

0x0800_0006              8=rx2_data_present

                         9=rx2_half_full

                        10=rx2_full

                        11=tx2_half_full

                        12=tx2_full

UART1_TXRX_DATA:

0x0800_0008             31..24=read byte                31..24=send byte

UART2_TXRX_DATA:

0x0800_000C             31..24=read byte                31..24=send byte

PROM_READER:

0x0800_0010             31..24=read current byte

0x0800_0011             23=requested sync               23=request next sync

                        22=requested data               22=request next byte

                        21=prom synced

                        20=data ready

TIMER1:

0x0800_0014             31=running/stopped              31=start/stop

                        30..0=current value             30..0=max. timer value

INTERRUPT_ENABLE:

0x0800_0018                                             31=enable timer1 interrupt

                                                        30=enable uart1 receive byte interrupt

                                                        29=enable uart2 receive byte interrupt

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MEMORY MAP

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0x0000_0000     block ram start (inside fpga)

0x0000_1fff     block ram end

0x0000_0000     reset vector

0x0000_0008     software exception vector (break)

0x0000_0010     interrupt vector

0x0000_0018     reserved (breakpoint vector)

0x0000_0020     hardware exception vector

0x0400_0000     external sram start

0x040f_ffff     external sram end

0x040e_2000     video ram start (inside external sram)

0x040f_ffff     video ram end (size = 0x1_e000)

0x0800_0000     i/o space

0x0800_xxxx