LatticeMico32: Opencore CAN

[Keller T. (fabito)]

Hi team,

I spend the whole day trying to connect the opencore CAN to 
LatticeMico32 without sucess.
As you know opencoreCAN doesn't have the signal wb_sel_i and this signal 
mandatory by creating custom component.
For that I moved forward with the signal and then I commented it within 
the top file as follow.

          // Instantiate user's custom module
          can_top instantiate_can_top (

                // Connect Wishbone slave
               .wb_adr_i(wb_ADR_I),
               .wb_dat_i(wb_DAT_I),
               .wb_we_i(wb_WE_I),
               //.wb_sel_i(wb_SEL_I),
               .wb_stb_i(wb_STB_I),
               .wb_cyc_i(wb_CYC_I),
               .wb_dat_o(wb_DAT_O),
               .wb_ack_o(wb_ACK_O),

                // Connect External signals
               .rx_i(rx_i),
               .tx_o(tx_o),

               .wb_clk_i(wb_clk_i),
               .wb_rst_i(wb_rst_i),
               .irq_on(wb_int_o) );


I then try to write to the CAN Control Register without success.
No possibility to access the CAN Component

  // turn on reset mode
    OPENCORECAN_REGISTER(OPENCORECAN3_BASE_ADDRESS, CAN_CONTROL_REG)=0x1F;

with

/* macro for reading/writing registers */
#define OPENCORECAN_REGISTER(BASE,OFFSET) *((volatile unsigned char *)(BASE + OFFSET))

So please, is there any trick helping me to move forward?

[Duke Scarring (Gast)]

Ngii Rayan schrieb:
> So please, is there any trick helping me to move forward?
Learn to simulate your designs.

Duke

[Keller T. (fabito)]

Thanks for your response,

But as you know sometimes it is assumed that the IP Core is functional. 
And I don't have enough time for my Internship that is the reason. For 
this reason I asked for any tricks

[Duke Scarring (Gast)]

Simulation is the trick to find the reason for such problems.

Duke

[Keller T. (fabito)]

OK Thanks for your advice I will try and let you know later

[Lupi Digitalus (Gast)]

Try to get in touch with the local Lattice people in Germany 
([e-mail]).
I'm pretty sure they can help you with your problem.