@Mitch Bailey could you help me with this error? GPIO-Defines .I got this in precheck failure

Is there a message in the log file about where to look for errors? It should be named

cvc.oeb.report

. If you can find that, but the messages are not clear, let me know.

@samarth jain Did you change your user defines? It is located in this file

verilog/rtl/user_defines.v

Hi, @Marwan Abbas, I am not sure what we should change in user_define.v file.Do you know any tutorial where I can get more info on it?

@samarth jain tutorial can be found here

Yes but they dont talk about how to set GPIO as analog inputs?I need to feed input voltage to my chip from outside sources for analog signals.Also as my all GPIO are analog, I can keep `io_oeb`floating? I am using caravel and not caravan.Below are my settings.Aditionally I am confused as I think analog is only from

analog_io[28:0]

but how come the user_defines have GPIO 5 TO 37 as analog?is it because gpio 5,6 are uart and how about GPIO 36,37?Kindly help to verify if my settings r ok @Marwan Abbas

@samarth jain In

user_project_wrapper

,

analog_io[28:0]

correspond to gpio 35:7. From

caravel_user_project/verilog/rtl/user_project_wrapper.v

// Analog (direct connection to GPIO pad---use with caution)
    // Note that analog I/O is not available on the 7 lowest-numbered
    // GPIO pads, and so the analog_io indexing is offset from the
    // GPIO indexing by 7 (also upper 2 GPIOs do not have analog_io).
    inout [`MPRJ_IO_PADS-10:0] analog_io,

If you use

GPIO_MODE_USER_STD_ANALOG

, set

io_oeb

to low. (high is also ok since the output driver is disabled). Leaving

io_oeb

open may result in an internal leak in the USER modes. You can also choose

GPIO_MODE_MGMT_STD_ANALOG

. In this case

io_oeb

can be open.

What are GPIO 36,37? @Mitch Bailey and I thought GPIO Mode MGMT STD ANALOG is for management area?but my design is in user area

GPIO 36 and 37 only have digital connections to user_project_wrapper. Here’s the settings for the gpio configurations. As you can see, the only difference between

GPIO_MODE_MGMT_STD_ANALOG

and

GPIO_MODE_USER_STD_ANALOG

is

MGMT_ENABLE

. However as you can see from the schematic,

MGMT_ENABLE

does not affect

PAD_A_ESD_0_H

which is what the

analog_io

connects to. You can look at the schematics and the gpio_control_block rtl.