Error: Inconsistent I/O type for element "GPIO_0"

Altera_Forum · ‎10-19-2010

Hello

I have the following error when I compile my code:

Could you say me wath is the problem?

I use a Custom IP in SopC for connect a CMOS-Sensor to the GPIO_0. First I would only test my camera, I put the signal in the FPGA and after I get it again to GPIO_1.

I have a DE2-Board with EP2C35F672C6N.

Here my code (toplevel):

-- VHDL Entity CMOS_Sensor_IP_lib.CMOS_Sensor.symbol

--

-- Created:

-- by - Antonio Carlucci.UNKNOWN (ANTONIOCARLUCCI)

-- at - 21:11:31 13.10.2010

--

-- Generated by Mentor Graphics' HDL Designer(TM) 2008.1b (Build 7)

--

LIBRARY ieee;

USE ieee.std_logic_1164.all;

USE ieee.std_logic_arith.all;

ENTITY CMOS_Sensor IS

PORT(

avs_read : IN STD_LOGIC;

avs_write : IN STD_LOGIC;

avs_writedata : IN STD_LOGIC_VECTOR (31 DOWNTO 0);

coe_DATA_IN : IN STD_LOGIC_VECTOR (9 DOWNTO 0);

coe_FV_IN : IN STD_LOGIC;

coe_LV_IN : IN STD_LOGIC;

coe_PIX_CLK_IN : IN STD_LOGIC;

csi_clk : IN STD_LOGIC;

csi_reset_n : IN STD_LOGIC;

avs_readdata : OUT STD_LOGIC_VECTOR (31 DOWNTO 0);

coe_DATA_OUT : OUT STD_LOGIC_VECTOR (9 DOWNTO 0);

coe_FV_OUT : OUT STD_LOGIC;

coe_LV_OUT : OUT STD_LOGIC;

coe_PIX_CLK_OUT : OUT STD_LOGIC;

coe_SCLK_OUT : OUT STD_LOGIC;

coe_SDAT_OUT : OUT STD_LOGIC;

coe_nSENS_RST_OUT : OUT STD_LOGIC

);

-- Declarations

END CMOS_Sensor ;

--

-- VHDL Architecture CMOS_Sensor_IP_lib.CMOS_Sensor.struct

--

-- Created:

-- by - Antonio Carlucci.UNKNOWN (ANTONIOCARLUCCI)

-- at - 21:11:31 13.10.2010

--

-- Generated by Mentor Graphics' HDL Designer(TM) 2008.1b (Build 7)

--

LIBRARY ieee;

USE ieee.std_logic_1164.all;

USE ieee.std_logic_arith.all;

LIBRARY CMOS_Sensor_IP_lib;

ARCHITECTURE struct OF CMOS_Sensor IS

-- Architecture declarations

-- Internal signal declarations

-- Component Declarations

COMPONENT IP_Component

PORT (

avs_read : IN STD_LOGIC ;

avs_write : IN STD_LOGIC ;

avs_writedata : IN STD_LOGIC_VECTOR (31 DOWNTO 0);

coe_DATA_IN : IN STD_LOGIC_VECTOR (9 DOWNTO 0);

coe_FV_IN : IN STD_LOGIC ;

coe_LV_IN : IN STD_LOGIC ;

coe_PIX_CLK_IN : IN STD_LOGIC ;

csi_clk : IN STD_LOGIC ;

csi_reset_n : IN STD_LOGIC ;

avs_readdata : OUT STD_LOGIC_VECTOR (31 DOWNTO 0);

coe_DATA_OUT : OUT STD_LOGIC_VECTOR (9 DOWNTO 0);

coe_FV_OUT : OUT STD_LOGIC ;

coe_LV_OUT : OUT STD_LOGIC ;

coe_PIX_CLK_OUT : OUT STD_LOGIC ;

coe_SCLK_OUT : OUT STD_LOGIC ;

coe_SDAT_OUT : OUT STD_LOGIC ;

coe_nSENS_RST_OUT : OUT STD_LOGIC

);

END COMPONENT;

-- Optional embedded configurations

-- pragma synthesis_off

FOR ALL : IP_Component USE ENTITY CMOS_Sensor_IP_lib.IP_Component;

-- pragma synthesis_on

BEGIN

-- Instance port mappings.

U_0 : IP_Component

PORT MAP (

avs_read => avs_read,

avs_write => avs_write,

avs_writedata => avs_writedata,

coe_DATA_IN => coe_DATA_IN,

coe_FV_IN => coe_FV_IN,

coe_LV_IN => coe_LV_IN,

coe_PIX_CLK_IN => coe_PIX_CLK_IN,

csi_clk => csi_clk,

csi_reset_n => csi_reset_n,

avs_readdata => avs_readdata,

coe_DATA_OUT => coe_DATA_OUT,

coe_FV_OUT => coe_FV_OUT,

coe_LV_OUT => coe_LV_OUT,

coe_PIX_CLK_OUT => coe_PIX_CLK_OUT,

coe_SCLK_OUT => coe_SCLK_OUT,

coe_SDAT_OUT => coe_SDAT_OUT,

coe_nSENS_RST_OUT => coe_nSENS_RST_OUT

);

END struct;

Thanks you for your effort.

Altera_Forum · ‎10-20-2010

Hi Antonio,

I presume that GPIO is the name of the array of your top level pins connecting to the sensor. So you have GPIO[0] which is an input and you are trying to drive GPIO[1] as an output. This is not allowed: all array signals must have the same direction.

I had a similar case. If this is yours too, simply change the name: i.e. GPIN for GPIO[0] and GPOUT for GPIO[1].

Cris

Altera_Forum · ‎10-20-2010

Another option is to make GPIO a bidirectional port and then permanently set [0] as input in your assignments and you will then be able to use the signals one as input and one as an output without spiting the array:

GPIO <= 'Z';
signalThatUsesGpio0 <= GPIO;
GPIO <= outputSignalforGpio1;

The compile will probably warn you the bidirectional port GPIO[0] is permanently set to an input and GPIO[1] is permanently set to an output, but this is what you want so you can ignore it.