有時(shí)候在debug GT的時(shí)候，需要用Digital monitor讀出RX equalizer的code，本篇文章以US+的GTM為例子，提供了一個(gè)步驟，詳細(xì)寄存器可以參考UG581.

Select DRP和Dmonitor port

Dmonitor port，用DRP CLK接上Dmonitorclk_in,通過邏輯或者ILA來對dmonitorout_out采樣讀取。

DRP讀寫寄存器，以CH0為例地址操作如下,CH1的地址將0x0xx改為0x2xx。

CH0:

1）0x082[0] = 1’b1; DMON_ENABLE, Enables digital monitor for channel 0/1.

0x082[2:1] = 2’b00; DMON_SRC, Enables RX DMON path for channel 0/1. Must be set to 2'b00 when reading RX adaptation loops.

0x082[3] =1’b0; DMON_FIFOBYPASS, Enables RX DMON path for channel 0/1. Must set to 1'b0 when reading RX adaptation loops.

2）0x045[13] = 1’b1; Set to 1'b1 when reading DFE adaptation loops.

3）0x033[15] = 1’b0, Set to 1'b0 to read DFE/FFE data.

4）0x033[14:12] =

=3'b100, 選DFE data.

=3'b110, 選FFE data.

讀DFE：0x046[15:12]: Selector to monitor DFE adaptation loops for channel 0/1. See output using CH[0/1]_DMONITOROUT port.

a. = 4'b0000; 讀[15:3] - H1_BINDACH1_BINDAC

b. = 4'b0001; 讀[30:25] - GC_BINDAC；[15:10] - KH_BINDAC

c. = 4'b0010; 讀[30:25] - KL_BINDAC；[14:8] - OS_BINDAC

讀FFE配置0x05C[13:12]=2’b10；Set to 2'b10 when reading FFE adaptation loops.

讀FFE; 0x05C[7:3]:

a. = 5'b00001，讀

[28:23] - FFE_HM4

[22:18] - FFE_HP10

[17:13] - FFE_HP09

[12:8] - FFE_HP08

[7:3] - FFE_HP07

b. =5'b00010 讀

[31:26] - FFE_HP06

[25:20] - FFE_HP05

[19:13] - FFE_HP04

[12:6] - FFE_HP03

c. = 5'b00011 讀

31:24] - FFE_HP02

[23:16] - FFE_HM01

[15:9] - FFE_HM02

[8:3] - FFE_HM03

Channel 1:DRP地址從0x0xx改為0x2xx

? 0x282[0]: DMON_ENABLE

? 0x282[2:1]: DMON_SRC

? 0x282[3]: DMON_FIFOBYPASS

? 0x245[13]: TESTEN

? 0x233[14:12]: DEMONCON

? 0x233[15]: CLKSEL

? 0x25C[13:12]: TESTC

? 0x246[15:12]: DFELOOPSEL

? 0x25C[7:3]: FFELOOPSEL

審核編輯：湯梓紅