How to use switches in TMS320C5515

Mateusz Kowalski

Hi,

I'm trying to modify this part of code:

interrupt void saradc_isr()
{

Uint16 key;
static int flag =1;
extern Uint8 Key_Count;
extern Uint8 Zoom_Flag;
extern Uint8 col;
if(flag== 0)
{
flag=1;
}
else
{
flag=0;
}

if(flag == 1)
{
key = Get_Sar_Key();

if((key >= SW8) && (key <= SW9))
{
/*interrupt for Change of Zoom of LCD display*/
if(Zoom_Flag==0)
{
Zoom_Flag = 1;
}
else
if(Zoom_Flag==1)
{
Zoom_Flag = 2;
}
else
if(Zoom_Flag==2)
{
Zoom_Flag = 0;
}
}
else if(key < (SW8 - 0x30))
{
if(Simulation_Flag == 0)
{
Simulation_Flag = 1;
}
else if(Simulation_Flag == 1)
{
Simulation_Flag = 0;
}
}
}

return;
}

Where bold text is what I was able to create and it's working (works on key SW13 on board). However when I'm trying to use other keys in similar fashion it's unfortunately not working. Can you explain me how to programme this?

Regards.

over 9 years ago

0 Lalindra Jayatilleke over 9 years ago

TI__Mastermind 30365 points

Mateusz,

I'm not sure as to which software package you are using, but all the buttons on the C5515 EVM are connected to GPAIN1. Changing the SW should work.

Could you please try to run the example at /c55_csl_3.04\c55xx_csl\ccs_v5.0_examples\sar\CSL_SAR_IntcExample?
Download site http://software-dl.ti.com/dsps/dsps_public_sw/dsps_swops_houston/C55X/latest/index_FDS.html

This would tell you what the read ADC value is for the other buttons. Perhaps your "if" conditions aren't taking the ADC values of the other buttons into consideration?

Hope this helps.

Lali

0 Mateusz Kowalski over 9 years ago in reply to Lalindra Jayatilleke

Prodigy 90 points

I've tried to add watch expression on "key" variable to check what ADC value is for other buttons. Only SW15 and SW13 work, other switches don't return any value whatsoever as if they were unplugged. But also I've used multimeter to check if it's working and yes, all switches work according to multimeter but apparently SAR ADC don't like them.

Am I missing something?

Regards

0 Lalindra Jayatilleke over 9 years ago in reply to Mateusz Kowalski

TI__Mastermind 30365 points

Mateusz,

I have requested the help of some HW experts to see if there is something missing from your setup.

Lali

0 Vasantha K over 9 years ago in reply to Lalindra Jayatilleke

TI__Genius 12575 points

Hi,

Could you share the definition of the function Get_Sar_Key that you used in your program.

I would recommend you to try the CSL SAR CSL_SAR_IntcExample example and ensure this works as suggested in the example description. This way you could isolate any hardware related issues that you had mentioned. I am assuming you are using C5515 EVM.

Regards

Vasanth

0 Mateusz Kowalski over 9 years ago in reply to Vasantha K

Prodigy 90 points

Thanks for reply

Uint16 Get_Sar_Key(void)

{

Uint16 val, i;

*SARCTRL = 0xB400;

while(1)
{
for(i=0;i<1500; i++)
asm(" nop");
val = *SARDATA;
if((val&0x8000) == 0)
break;
}

return(val);
}

Processors

Processors forum

How to use switches in TMS320C5515