XM014034B datasheet(39/83 Pages) XMOS

39 / 83 page

XU6--QF6A Datasheet

D..

Only works when processor is in Debug mode.

C..

Conditional permission, see Appendix C. .

Accessing a processor status register

The processor status registers are accessed directly from the processor instruction set.

The instructions GETPS and SETPS read and write a word. The register number should

be translated into a processor-status resource identier by shifting the register number

left 8 places, and ORing it with xB. Alternatively, the functions getps(reg) and setps(

→

reg,value)

can be used from XC.

Accessing an xCORE Tile conguration register

xCORE Tile conguration registers can be accessed through the interconnect using the

functions write_tile_config_reg(tileref, ...) and read_tile_config_reg(tile ref,

→

...)

, where tileref is the name of the xCORE Tile, e.g. tile[1]. These functions

implement the protocols described below.

Instead of using the functions above, a channel-end can be allocated to communicate

with the xCORE tile conguration registers. The destination of the channel-end should

be set to 0xnnnnC20C where nnnnnn is the tile-identier.

A write message comprises the following:

control-token

-bit response

6-bit

-bit

control-token

channel-end identier

data

The response to a write message comprises either control tokens and (for success),

or control tokens and (for failure).

A read message comprises the following:

control-token

-bit response

6-bit

control-token

channel-end identier

The response to the read message comprises either control token ,

-bit of data, and

control-token (for success), or control tokens and (for failure).

Accessing node conguration

Node conguration registers can be accessed through the interconnect using the func-

tions write_node_config_reg(device, ...) and read_node_config_reg(device, ...), where

device

is the name of the node. These functions implement the protocols described be-

low.

Instead of using the functions above, a channel-end can be allocated to communicate

with the node conguration registers. The destination of the channel-end should be set

to 0xnnnnC30C where nnnn is the node-identier.

A write message comprises the following:

XM014034B Datasheet(PDF) 39 Page - Xmos Ltd.

XM014034B Datasheet(HTML) 39 Page - Xmos Ltd.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

Datasheet Download

Link URL