Switch & LED using TMS320C6745 DSP

LED & Switch
Interface
using
TMS320C6745
https://www.pantechsolutions.net/products/dsp-
dsc-boards/tms320c6745-tyro

Technology beyond the Dreams™ Copyright © 2014 Pantech Prolabs India Pvt Ltd.
Features of GPIO
The GPIO peripheral consists of the following
features
• Separate input/output registers
• All GPIO signals can be used as interrupt sources
• All GPIO signals can be used to generate events
to the EDMA.

Led Connection to C6745

GPIO Registers

GPIO Address

GPIO Direction Registers (DIRn)
By default, all the GPIO pins are configured as inputs
(bit value = 1)
1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
F 0 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
F F F F
0xF000FFFF

GPIO Output Data Registers
(OUT_DATAn)
0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
0 F F F
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0x0FFF0000
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0
0x00000000

STEPS FOR LED BLINKING
Declare two pointer variables for GPIO Direction register
and GPIO Data Register
Set Byte Address for GPIO Direction register and GPIO Data
Register
Configure GPIO as output in GPIO Direction Register
Configure Required Blinking data in GPIO Data Register

Set Base Address
• gpio_dir01 = (Uint32 *)0x01E26010;
• gpio_out_data01 = (Uint32 *)0x01E26014;
Configure Direction register as Output
*gpio_dir01 = 0xF000FFFF;
Configure Data register as Output
*gpio_out_data01 = 0x0FFF0000;

DIP SWITCH INTERFACE

GPIO Input Data Registers (IN_DATAn)

Program
#define Uint32 unsigned int
Uint32 Value,i;
void DelayMs(Uint32 Ms);
void main()
{
Uint32 *gpio_in_data01,*gpio_out_data01,*gpio_dir01;
gpio_in_data01 = (Uint32 *)0x01E26020;
gpio_dir01 = (Uint32 *)0x01E26010;
gpio_out_data01 = (Uint32 *)0x01E26014;
*gpio_dir01 = 0xF000FFFF;
while(1)
{
Value = *gpio_in_data01;
*gpio_out_data01 = Value<<16;
DelayMs(100);
}
}
void DelayMs(Uint32 Ms)
{
Uint32 i;
while(Ms>0)
{
for(i=0;i<30000;i++);
Ms--;
}
}

?

For more details
– www.pantechsolutions.net
– http://www.slideshare.net/pantechsolutions
– http://www.scribd.com/pantechsolutions
– http://www.youtube.com/pantechsolutions

Switch & LED using TMS320C6745 DSP

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Switch & LED using TMS320C6745 DSP