How to configure PORTB in TMS570LS1227

Hi David,

 At first glance, I don't see anything wrong with your code. Could you try to directly write a '1' to PORTB DOUT register in the debugger and see if the LED is turned on. You can also check the DIN register to see if it is set to '1' as well.

  I will also suggest that you try other GIO pins. If any other GIO pins turn on the LED but PORTB[0] then you might want to investigate the hardware connection on your board.

Hi,

The DIn register is set to 0x00000000. I can't modify this in CCS.

Hi David,
I mean to say that if you write to the DOUT register then the DIN register will reflect what you had written as well. So if you write to the DOUT register for PORTB[0] do you see the LED? Before you write to any GIO registers you must also release the GIO module from internal reset by setting the GIOGCR0.0 to high.

Hi David,
I just created a simple project and I'm able to see GIOB[0] toggling at a rate of 2.6Hz using your code. You might want to check your board connection.

Hi Charles,

Unfortunately, I'm not an expert in programming, please could you give me some clues to set GIOGCR0.0 at '1'? I tried to modify the register GlbCtrl to set a '1' in CCS, but it didn't change.

Also, I modified the PORTB[0] in HALCoGen using different configurations to see if I was capable of modifying the value of DOUT (0 and 1 in different projects), nothing new happened. The most strange thing was that the value of the register in CCS didn't change even when I forced a '1' in DOUT (maybe this is because the RESET is still low). Also, I've seen that the register Srs is unable to read, I don't know if this's important!

Regarding the hardware, there's electrical connectivity between the LED and the PORTB[0]. I've simplified my script to set a '1' in PORTB[0] to see always 3.3V.

Thanks a lot!

Hi David,

  In HalCoGen there is a Driver Enable tab. Can you go to this tab and make sure that 'Enable GIO driver' checkbox is checked. See below. I have also included a working project to to toggle PORTB[0] that you can reference. 2728.LS1227_GIO.zip

Hi Charles,

I checked my HALCoGen project and the GIO driver was enabled! Apart from this, I used your project to test my board, but I had the same result, nothing happens in PORTB[0].

I also tried to do the same with NHET1[2] using the following script (this pin's directly droven to a connector), but I had the same result.

#include "sys_common.h"
#include"het.h"

void main(void)
{
int temp,delay;
/** -Delay Parameter */
delay = 0x200000;
/* Set HET port pins to output */
gioSetDirection(hetPORT1, 0xFFFFFFFF);
while(1)
{
/* Set HET port pin 1 high */
gioSetBit(hetPORT1, 2, 1);
/** -Simple Delay */
for(temp=0;temp<delay;temp++);
/* Set HET port pin 1 low */
gioSetBit(hetPORT1, 2, 0);
/** -Simple Delay */
for(temp=0;temp<delay;temp++);
}
}

/* GIO Notification function not used, but required by compiler */
voidgioNotification(intbit)
{
return;
}

Regarding the hardware, I checked the different VCCIOs and VCCs to know if there was any problem with the power system, but they're powered at 3V3 and 1V2 repectively!

I don't have more ideas!

Thanks!

David

HI David,

  Can you run my project or your project on the development board? Hopefully you have either a launchpad or a HDK board from TI. Just want to prove that it is not a software issue. If the software is good, then you can focus on the hardware aspect. 

  Do you have ECLK on your board? If yes, can you in CCS register window, do:

  1. Write 0x01 to the SYS module SysPc1 register.

  2. Write 0x00800007 to the SYS module EcpCntl register.

  If you have ECLK pin then you should see the internal VCLK divided 8 brought out to the pin? Do you see anything? Please also try this on your development board.

  One more thing I'd like you to check. Since you can't see NHET1[2] as an output on your board, what about input. Please configure NHET1[2] to an input pin and toggle the input high or low on this pin. Observe the Din register and do you see Din changes?

  You might want to check if there is any short in the board?

  

Hi Charles,

I think I wasn't clear in my first post! I'm using a customized board (the design is mine). Maybe, there's an special configuration of the micro for third party developers. Thnks!

David

Hi David,

  It is clear to me that you have your own customized board. There is no special configuration of the micro that will only work in the development board (i.e. LaunchPad or HDK) but not your board.

Hi Charles,

I've checked the ECLK in both boards writing the values you gave me before. In my HDK the frequency of the ECLK signal is 11MHz and 320mV peak-to-peak, and in my board this's 1MHz and 5.5V peak-to-peak!

David

It works!!

Thanks a lot Charles!!

Hi David,

  Glad you problem is now resolved. 

Hi David,

  Do you mind to share what went wrong so that the community members may benefit in the future for similar problems?