Hello...
I am working on my graduation project [JUST mobile].. but i am stuck
with the keypad interrupt..
i have a 16-keys key pad connected to the DIO interface of TS7200
pins [0-3] , and i have a data ready interrupt signal from the
keypad connected to pin 8 of the DIO which is on port F bit 1.
I can read from the keypad ,but when I tried to create a program to
test the interrupt i had some complications, if any body has some
ideas to share i will be thankfull.
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here is a link to the c code...
http://www.geocities.com/just2007mobile/jkey3.c
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The code is based on chapter 5 (Vectored Interrupt Controller),and
chapter 21 (GPIO Interface) of the EP9301 User's Manual.
The code simply has an infinite loop in the main Method of the
program that prints the status of the portB,portF and the VIC
registers.The expected output from this program is to call another
Method [PFIntHandler()] when a key is pressed.
please note the following :
In the manuals DIO_8 on port F is bit 1 which is interrupt sourse
number 21[GPIO1INTR] of VIC1. but when i press a key on my key pad,
the raw int sts reg indicates that interrupt source 20[GPIO0INTR] is
changed instead !!!.so i decided to use Int source 20 for DIO_8 pin.
I have enabled the Interrupt source 20 ,selected it as an IRQ,linked
it to vector 0 and gave it a Vector address.But the problem I am
facing is that the raw_sts_reg of vic1 indicates an interrupt from
source 20 but the IRQ_sts_reg does not, and eventaly the interrupt
handler is not invoked.
also after i press the key the first time the interrupt enable
becomes 0 for the pin (i dont know why!!!)
this is a sample output from my test program :
____START________START________START________START_____
=================main method Block=================
DIO data : 0x 0
***----------------Port F regs----------------***
Port F DR : 0x 0
Port F Int sts : 0x 0
Port F Int raw sts : 0x 2
*************************************************
***------------------VIC regs-----------------***
VIC IRQ sts : 0x 0
VIC FIQ sts : 0x 0
VIC select reg : 0x 0
VIC enable reg : 0x 10
VIC *v1 V00 ctrl : 0x 0
*v1VA00Ptr : 0x 0
VIC raw Int sts : 0x 10000008
*************************************************
%%%%%%%%%%____init____%%%%%%%%%
DIO data : 0x 0
***----------------Port F regs----------------***
Port F DR : 0x 0
Port F Int sts : 0x 0
Port F Int raw sts : 0x 0
*************************************************
***------------------VIC regs-----------------***
VIC IRQ sts : 0x 0
VIC FIQ sts : 0x 0
VIC select reg : 0x 0
VIC enable reg : 0x 100010
VIC *v1 V00 ctrl : 0x 34
*v1VA00Ptr : 0x 8cbc
VIC raw Int sts : 0x 10000008
*************************************************
=====================================================
PFIntHandler addr : 0x 8cbc
____LOOP________LOOP________LOOP________LOOP_____
================main method Block================
DIO data : 0x 0
***----------------Port F regs----------------***
Port F DR : 0x 0
Port F Int sts : 0x 0
Port F Int raw sts : 0x 0
*************************************************
***------------------VIC regs-----------------***
VIC IRQ sts : 0x 0
VIC FIQ sts : 0x 0
VIC select reg : 0x 0
VIC enable reg : 0x 100010
VIC *v1 V00 ctrl : 0x 34
*v1VA00Ptr : 0x 8cbc
VIC raw Int sts : 0x 10000008
*************************************************
===================================================
================main method Block================
DIO data : 0x 6
***----------------Port F regs----------------***
Port F DR : 0x 2
Port F Int sts : 0x 2
Port F Int raw sts : 0x 2
*************************************************
***------------------VIC regs-----------------***
VIC IRQ sts : 0x 0
VIC FIQ sts : 0x 0
VIC select reg : 0x 0
VIC enable reg : 0x 10
VIC *v1 V00 ctrl : 0x 34
*v1VA00Ptr : 0x 8cbc
VIC raw Int sts : 0x 10100008
*************************************************
===================================================
================main method Block================
DIO data : 0x 6
***----------------Port F regs----------------***
Port F DR : 0x 0
Port F Int sts : 0x 2
Port F Int raw sts : 0x 2
*************************************************
***------------------VIC regs-----------------***
VIC IRQ sts : 0x 0
VIC FIQ sts : 0x 0
VIC select reg : 0x 0
VIC enable reg : 0x 10
VIC *v1 V00 ctrl : 0x 34
*v1VA00Ptr : 0x 8cbc
VIC raw Int sts : 0x 10100008
*************************************************
===================================================
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