Regarding PB4

[bbbodekar]

Posted on August 29, 2003 at 05:31

Regarding PB4

[bbbodekar]

Posted on May 17, 2011 at 11:55

Hello,

1. I am trying to connect a switch to PB4 on the DK3 I have made the necessary changes in the configuration for Port B and in the PSD soft, confiugred the pin to be GPIO. Also i have a 4.7K resistor pullup for PB4 to Vcc2. But still i am not able to get any response from the switch. I am able to use the other switches ( SW4 & SW5 ) which are connected to pins of Port B.

2. Can i access the Port B from the timer ISR ? I want to read the switch status at a regular interval, and glow the corresponding LED's from timer0 ISR. If i put the code outside timer routine, i am able to do it, but not from timer0 ISR.

Kindly suggest me how to go for the above problems.

Regards,

Bhushan.

[yu-jun]

Posted on May 17, 2011 at 11:55

Can you post the *.abl file in the formus

[bbbodekar]

Posted on May 17, 2011 at 11:55

Hi,

Here is the *.abl file

module trial1

LCD_d7 PIN 21; ''Reserved for Peripheral I/O mode

LCD_d6 PIN 22; ''Reserved for Peripheral I/O mode

LCD_d5 PIN 24; ''Reserved for Peripheral I/O mode

LCD_d4 PIN 26; ''Reserved for Peripheral I/O mode

LCD_d3 PIN 28; ''Reserved for Peripheral I/O mode

LCD_d2 PIN 32; ''Reserved for Peripheral I/O mode

LCD_d1 PIN 34; ''Reserved for Peripheral I/O mode

LCD_d0 PIN 35; ''Reserved for Peripheral I/O mode

LCD_enable PIN 66;

LCD_rw PIN 67;

LCD_rs PIN 72;

SW3 PIN 73; ''GP I/O

SW2 PIN 74; ''GP I/O

SW1 PIN 76; ''GP I/O

LED2 PIN 78; ''GP I/O

LED1 PIN 80; ''GP I/O

tdo PIN 6; ''TDO

tdi PIN 7; ''TDI

vbaton PIN 9; ''Standby-on indicator

vstby PIN 15; ''SRAM standby voltage input

tck PIN 16; ''TCK

tms PIN 20; ''TMS

ale PIN 4; ''ALE output

SCL2 PIN 46; ''I2C bus - Clock

SDA2 PIN 44; ''I2C bus - Data

ADC_Ch0 PIN 59; ''ADC channel0 input

Toggle_pin1 PIN 52; ''GP I/O

a11 PIN 57; ''Address line

a10 PIN 55; ''Address line

a9 PIN 53; ''Address line

a8 PIN 51; ''Address line

a7 PIN 47; ''Data/address bus line

a6 PIN 45; ''Data/address bus line

a5 PIN 43; ''Data/address bus line

a4 PIN 41; ''Data/address bus line

a3 PIN 39; ''Data/address bus line

a2 PIN 38; ''Data/address bus line

a1 PIN 37; ''Data/address bus line

a0 PIN 36; ''Data/address bus line

_Reset_In PIN 68;

VREF PIN 70; ''VREF input

_rd PIN 62;

_psen PIN 63;

_wr PIN 65;

USB_minus PIN 8; ''USB- bus

USB_plus PIN 10; ''USB+ bus

Xtal1 PIN 48; ''Xtal1

Xtal2 PIN 49; ''Xtal2

psel0 node;

rs0 node;

csiop node;

fs0 node;

fs1 node;

fs2 node;

fs3 node;

csboot0 node;

csboot1 node;

csboot2 node;

csboot3 node;

_reset node 543;

a12 node 512;

a13 node 513;

a14 node 514;

a15 node 515;

pgr1..pgr0 node;

X = .x.;

address = [a15..a0];

page = [pgr1..pgr0];

Vcc = 1;

Gnd = 0;

// Begin user preserved declarations (not affected by iterations of DA usage) ===================

// End user preserved declarations (not affected by iterations of DA usage) ===================

equations

rs0 = ((address >= ^h2000) & (address <= ^h3FFF));

csiop = ((address >= ^h0200) & (address <= ^h02FF));

fs0 = ((page == 0) & (address >= ^h8000) & (address <= ^hFFFF));

fs1 = ((page == 1) & (address >= ^h8000) & (address <= ^hFFFF));

fs2 = ((page == 2) & (address >= ^h8000) & (address <= ^hFFFF));

fs3 = ((page == 3) & (address >= ^h8000) & (address <= ^hFFFF));

csboot0 = ((address >= ^h0000) & (address <= ^h1FFF));

csboot1 = ((address >= ^h2000) & (address <= ^h3FFF));

csboot2 = ((address >= ^h4000) & (address <= ^h5FFF));

csboot3 = ((address >= ^h6000) & (address <= ^h7FFF));

psel0 = ((address >= ^h0300) & (address <= ^h03FF));

LCD_enable = ((address >= ^h0300) & (address <= ^h03FF) & (!_rd))

# ((address >= ^h0300) & (address <= ^h03FF) & (!_wr));

LCD_rw = a0;

LCD_rw.oe = Vcc;

LCD_rs = a1;

LCD_rs.oe = Vcc;

// Begin user preserved equations (not affected by iterations of DA usage) ===================

// End user preserved equations (not affected by iterations of DA usage) ===================

end trial1

Bhushan.

[yu-jun]

Posted on May 17, 2011 at 11:55

Your ABL file is correct. I think you would check your circuit and check if the PB4 is low when the key is pressed.

Now you read the PB data IN register (csiop + 01).

[elsiun]

Posted on May 17, 2011 at 11:55

There is good example of how to use PB port and SW1 & SW2 int the following attachment.