Hi all,
I'm a college student working on a project and I'm trying to use the
GPIO pins on the DC7 expansion connector. I wrote a software program
that calls the EVMDM355_GPIO_init() function from the development
environment found at: http://c6000.spectrumdigital.com/evmdm355/revd/
under DM355 EVM Target Content. The program looks like this:
/* Main.c is a test of the basic GPIO functions
* Written by Charlie Reitsma
************************************************/
#include <stdio.h>
/* Include the header files for the dm355 interface */
#include "evmdm355.h"
#include "evmdm355_i2c.h"
#include "evmdm355_gpio.h"
int main(void)
{
printf("I ran, I'm running");
EVMDM355_init( );
// EVMDM355_GPIO_getInput( 31 );
return 0;
}
I compile it using "make" and the following Makefile:
ROOTDIR = ./
include $(ROOTDIR)/Rules.make
RELTARGET = release/$(TARGET)
# The prefix to be added before the GNU compiler tools (optionally including
# path), i.e. "arm_v5t_le-" or "/opt/bin/arm_v5t_le-".
MVTOOL_DIR=/opt/mv_pro_4.0.1/montavista/pro/devkit/arm/v5t_le
MVTOOL_PREFIX=$(MVTOOL_DIR)/bin/arm_v5t_le-
all: evmdm355.o evmdm355_gpio.o evmdm355_i2c.o main.o
@echo Linking $@ from $^..
$(MVTOOL_PREFIX)gcc -o GPIO_test main.o evmdm355.o evmdm355_gpio.o
evmdm355_i2c.o
main.o: evmdm355_gpio.h evmdm355_gpio.c evmdm355.h evmdm355.c
evmdm355_i2c.h evmdm355_i2c.c main.c
@echo ======== Building $(TARGET) ========
@echo Configuring application using
$(MVTOOL_PREFIX)gcc -Wall -DDM355
-Dti_sdo_ce_osal_Memory_USEDEPRECATEDAPIS=1
-I$(LINUXKERNEL_INSTALL_DIR)/include -c main.c
evmdm355.o: evmdm355.h evmdm355.c
@echo ======== Building $(TARGET) ========
@echo Configuring application using $<
$(MVTOOL_PREFIX)gcc -Wall -DDM355
-Dti_sdo_ce_osal_Memory_USEDEPRECATEDAPIS=1
-I$(LINUXKERNEL_INSTALL_DIR)/include -c evmdm355.c
evmdm355_i2c.o: evmdm355.h evmdm355.c evmdm355_i2c.c evmdm355_i2c.h
@echo ======== Building $(TARGET) ========
@echo Configuring application using $<
$(MVTOOL_PREFIX)gcc -Wall -DDM355
-Dti_sdo_ce_osal_Memory_USEDEPRECATEDAPIS=1
-I$(LINUXKERNEL_INSTALL_DIR)/include -c evmdm355_i2c.c
evmdm355_gpio.o: evmdm355_gpio.h evmdm355_gpio.c evmdm355.h evmdm355.c
evmdm355_i2c.h evmdm355_i2c.c
@echo ======== Building $(TARGET) ========
@echo Configuring application using $<
$(MVTOOL_PREFIX)gcc -Wall -DDM355
-Dti_sdo_ce_osal_Memory_USEDEPRECATEDAPIS=1
-I$(LINUXKERNEL_INSTALL_DIR)/include -c evmdm355_gpio.c
install:
@echo
@echo Installing $(TARGET) target files to $(EXEC_DIR)..
$(VERBOSE) install -d $(EXEC_DIR)
$(VERBOSE) install $(RELTARGET) $(EXEC_DIR)
$(VERBOSE) install -m 444 $(TARGET).txt $(EXEC_DIR)
clean:
@echo Removing generated files..
\rm *.o *~ GPIO_test
When the EVMDM355_init( ); is called, the program gives me a segfault.
Is there something else I need to do in order to read these GPIOs?
Thanks for any help you can give. It's sincerely appreciated.
Charlie Reitsma
P.S. Here are the files used in the program:
evmdm355_gpio.c:
/*
* Copyright 2005 by Spectrum Digital Incorporated.
* All rights reserved. Property of Spectrum Digital Incorporated.
*/
/*
* GPIO implementation
*
*/
#include "evmdm355_gpio.h"
/* ------------------------------------------------------------------------ *
* *
* _GPIO_init( ) *
* *
* ------------------------------------------------------------------------ */
Int16 EVMDM355_GPIO_init()
{
/* Free GPIO from emulation */
GPIO_PCR = 1;
return 0;
}
/* ------------------------------------------------------------------------ *
* *
* _GPIO_setDirection( number, direction ) *
* *
* number <- GPIO# *
* direction <- 0:OUT 1:IN *
* *
* ------------------------------------------------------------------------ */
Int16 EVMDM355_GPIO_setDirection( Uint16 number, Uint8 direction )
{
Uint32 bank_id = ( number >> 5 );
Uint32 pin_id = ( 1 << ( number & 0x1F ) );
Uint32* gpio_dir = ( Uint32* )( GPIO_BASE + GPIO_DIR_BASE + (
bank_id * GPIO_BASE_OFFSET ) );
if ( ( direction & 1 ) == GPIO_OUT )
*gpio_dir &= ~( pin_id ); // Set to OUTPUT
else
*gpio_dir |= ( pin_id ); // Set to INPUT
return 0;
}
/* ------------------------------------------------------------------------ *
* *
* _GPIO_setOutput( number, output ) *
* *
* number <- GPIO# *
* value <- 0:LOW 1:HIGH *
* *
* ------------------------------------------------------------------------ */
Int16 EVMDM355_GPIO_setOutput( Uint16 number, Uint8 output )
{
Uint32 bank_id = ( number >> 5 );
Uint32 pin_id = ( 1 << ( number & 0x1F ) );
Uint32* gpio_out = ( Uint32* )( GPIO_BASE + GPIO_OUT_DATA_BASE + (
bank_id * GPIO_BASE_OFFSET ) );
if ( ( output & 1 ) == 0 )
*gpio_out &= ~( pin_id ); // Set to LOW
else
*gpio_out |= ( pin_id ); // Set to HIGH
return 0;
}
/* ------------------------------------------------------------------------ *
* *
* _GPIO_getInput( number ) *
* *
* number <- GPIO# *
* *
* Returns: 0:LOW *
* 1:HIGH *
* *
* ------------------------------------------------------------------------ */
Int16 EVMDM355_GPIO_getInput( Uint16 number )
{
Uint32 input;
Uint32 bank_id = ( number >> 5 );
Uint32 pin_id = ( number & 0x1F );
Uint32* gpio_in = ( Uint32* )( GPIO_BASE + GPIO_IN_DATA_BASE + (
bank_id * GPIO_BASE_OFFSET ) );
input = *gpio_in;
input = ( input >> pin_id ) & 1;
return input;
}
evmdm355_gpio.h:
/*
* Copyright 2005 by Spectrum Digital Incorporated.
* All rights reserved. Property of Spectrum Digital Incorporated.
*/
/*
* GPIO header file
*
*/
#ifndef GPIO_
#define GPIO_
#include "evmdm355.h"
#define GPIO_IN 1
#define GPIO_OUT 0
#define GPIO0 0x00
#define GPIO1 0x01
#define GPIO2 0x02
#define GPIO3 0x03
#define GPIO4 0x04
#define GPIO5 0x05
#define GPIO6 0x06
#define GPIO7 0x07
#define GPIO8 0x08
#define GPIO9 0x09
#define GPIO10 0x0A
#define GPIO11 0x0B
#define GPIO12 0x0C
#define GPIO13 0x0D
#define GPIO14 0x0E
#define GPIO15 0x0F
#define GPIO16 0x10
#define GPIO17 0x11
#define GPIO18 0x12
#define GPIO19 0x13
#define GPIO20 0x14
#define GPIO21 0x15
#define GPIO22 0x16
#define GPIO23 0x17
#define GPIO24 0x18
#define GPIO25 0x19
#define GPIO26 0x1A
#define GPIO27 0x1B
#define GPIO28 0x1C
#define GPIO29 0x1D
#define GPIO30 0x1E
#define GPIO31 0x1F
#define GPIO32 0x20
#define GPIO33 0x21
#define GPIO34 0x22
#define GPIO35 0x23
#define GPIO36 0x24
#define GPIO37 0x25
#define GPIO38 0x26
#define GPIO39 0x27
#define GPIO40 0x28
#define GPIO41 0x29
#define GPIO42 0x2A
#define GPIO43 0x2B
#define GPIO44 0x2C
#define GPIO45 0x2D
#define GPIO46 0x2E
#define GPIO47 0x2F
#define GPIO48 0x30
#define GPIO49 0x31
#define GPIO50 0x32
#define GPIO51 0x33
#define GPIO52 0x34
#define GPIO53 0x35
#define GPIO3V3_0 0x36
#define GPIO3V3_1 0x37
#define GPIO3V3_2 0x38
#define GPIO3V3_3 0x39
#define GPIO3V3_4 0x3A
#define GPIO3V3_5 0x3B
#define GPIO3V3_6 0x3C
#define GPIO3V3_7 0x3D
#define GPIO3V3_8 0x3E
#define GPIO3V3_9 0x3F
#define GPIO3V3_10 0x40
#define GPIO3V3_11 0x41
#define GPIO3V3_12 0x42
#define GPIO3V3_13 0x43
#define GPIO3V3_14 0x44
#define GPIO3V3_15 0x45
/* ------------------------------------------------------------------------ *
* Prototypes *
* ------------------------------------------------------------------------ */
Int16 EVMDM355_GPIO_init ( );
Int16 EVMDM355_GPIO_setDirection ( Uint16 number, Uint8 direction );
Int16 EVMDM355_GPIO_setOutput ( Uint16 number, Uint8 output );
Int16 EVMDM355_GPIO_getInput ( Uint16 number );
#endif
_______________________________________________
Davinci-linux-open-source mailing list
[email protected]
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
