AR# 38440: 12.3 EDK, AXI_V6_DDRx - ERROR:MapLib:1002 - IDELAYCTRL processing failed. IDELAYCTRL symbol ... have the same IODELAY_GROUP constraint
AR# 38440
12.3 EDK, AXI_V6_DDRx - ERROR:MapLib:1002 - IDELAYCTRL processing failed. IDELAYCTRL symbol ... have the same IODELAY_GROUP constraint
Description
When using multiple AXI_V6_DDRx controllers, the following error occurs:
ERROR:MapLib:1002 - IDELAYCTRL processing failed. IDELAYCTRL symbol "DDR3_SDRAM/DDR3_SDRAM/IODELAY_CTRL.u_axi_v6_ddrx_iodelay_ctrl/u_idelayctrl" (output signal=DDR3_SDRAM/DDR3_SDRAM/IODELAY_CTRL.u_axi_v6_ddrx_iodelay_ctrl/iodelay_ctrl_rdy_i) and IDELAYCTRL symbol "axi_v6_ddrx_0/axi_v6_ddrx_0/IODELAY_CTRL.u_axi_v6_ddrx_iodelay_ctrl/u_idelayctrl" (output signal=axi_v6_ddrx_0/axi_v6_ddrx_0/IODELAY_CTRL.u_axi_v6_ddrx_iodelay_ctrl/iodelay_ctrl_rdy_i)have the same IODELAY_GROUP constraint but do not share the same Reset signal.
How do I resolve this error?
Solution
This issue is caused by the two AXI_V6_DDRx cores having the same IODELAY_GROUP. To work around this issue, set a different IODELAY_GROUP parameter for each core:
PARAMETER C_IODELAY_GRP = DDR_INST_0
This issue isplanned to be fixed in AXI_V6_DDRx v1.01.a, to be released in EDK 12.4. The fix will be to automatically set the IODELAY_GROUP parameter to the instance name when not set by the user.