DAC8760EVM: DAC 8742HEVM Software Installation

Renato Luciano Ros

Part Number: DAC8760EVM
Other Parts Discussed in Thread: DAC8742H, LAUNCHXL-CC2640R2, USB2ANY, CC2640R2F

Hi, I have problems with the screem of the program, the Windows not fulled the screem and there is some hide area. How to solve this problem?

Thank you,

Renato Luciano Ros

over 5 years ago

0 Garrett Satterfield over 5 years ago

TI__Expert 5820 points

Hi Renato,

I do not understand the issue based on your description. Can you provide more details and a screenshot of the issue?

Thanks,
Garrett

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

Hi Garret,

The main issue is, I can not maximize the EVM software screen. Because of this, I can not see what's on the bottom of the screen, that is, I do not see 100% of the screen.The button to maximize the screen is not active.

Do I need to change the display resolution? Or do some software update?

I can not send a copy of the screen at this time, only later.

Thanks,

Renato

0 Garrett Satterfield over 5 years ago in reply to Renato Luciano Ros

TI__Expert 5820 points

Hi Renato,

It appears that the maximize button has been disabled and the GUI seems to be fixed size. I have not seen this issue before. Are you using a low resolution monitor? One idea to try is finding the executable file for DAC8742H in program files (DAC8742H EVM.exe) and changing the settings under the compatibility tab. I am not sure that this will resolve the issue but there are some settings related to scaling and resolution. As you suggested you could also try changing your display resolution/settings.

Thanks,
Garrett

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

Hi Garret, I didn´t solve the problem with the screem, but that does not stop me from doing the tests. I have two DAC8742H EVM and I tested each one with loopback and it worked fine. When I connected the two EVM, each one in a computer, to test the HART communication it didn´t work. How the correct way to test HART communication betwen this two EVM? I want to do the LAUNCHXL-CC2640R2 connecting by UART on the DAC8742H and the DARC8742H connecting by HART to a Industrial Sensor that send the data by HART.

Thanks

0 Garrett Satterfield over 5 years ago in reply to Renato Luciano Ros

TI__Expert 5820 points

Hi Renato,

The screen problem seems like a display setting or resolution issue. To test communication between two DAC8742H EVMs connect MODOUT of the transmitting EVM to MODIN of the receiving EVM. One important note is that you will have to use two separate computers as errors occur if you try to launch two instances of the EVM GUI software. To communicate with a sensor transmitter device both MODIN and MODOUT will be coupled to the high side of the load resistor. I have linked a blog below showing how HART is implemented on the input module. Let me know if you have additional questions.

https://e2e.ti.com/blogs_/b/analogwire/archive/2018/04/02/how-to-hart-enable-your-analog-input-module

Thanks,
Garrett

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

I have connected as you said, but it didn´t work. The single EVM work well with loopback! I am trying to connect both EVMs to simulate a HART communication, could you give me more details about it, please?

0 Garrett Satterfield over 5 years ago in reply to Renato Luciano Ros

TI__Expert 5820 points

Hi Renato,

Are there anymore details you can provide about how you are connecting them, perhaps a diagram? What are the software settings you are using in the EVM GUI? Are all of the jumpers on the EVM in their default positions?

Thanks,
Garrett

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

Hi Garrett, we conecting the EVMs like showed in the diagram in the last documentation, MOD OUT and MOD IN coupled to the high side of the load resistor 250 ohms. We inserted the resistor on the terminals of the EVM and we have connected the EVMs by two wires. The GUI is configurated for UART, HART, the two boxes on high level configuration are ON. The jumpers are in their default position.

0 Garrett Satterfield over 5 years ago in reply to Renato Luciano Ros

TI__Expert 5820 points

Hi Renato,

I will use two EVMs to replicate your setup and see if I can get it working correctly. I will let you know the result.

Thanks,
Garrett

0 Garrett Satterfield over 5 years ago in reply to Garrett Satterfield

TI__Expert 5820 points

Hi Renato,

I replicated your setup using two PCs and two EVMs. There seems to be a timing/software issue with the EVM software. I was able to transmit data over UART but the timing between clicking generate write on the TX EVM and clicking generate read on the RX EVM had to be specific. I had more success using the SPI mode which worked well between the two EVMs. The EVM is mainly for validating the HART physical layer and not to communicate extensively with other HART devices. The main limitation is due to the USB2ANY software timing. If you using the EVM to communicate with another device I would suggest using an MCU like an MSP lauchpad to control the UART communication. This should be fairly easy to accomplish code wise.

Thanks,
Garrett

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

Thank you!

0 Renato Luciano Ros over 5 years ago in reply to Garrett Satterfield

Prodigy 80 points

Hi Garrett,

I have a CC2640R2F Development Kit communicating with EVM8742 via UART. The communication is working like a charm. However I have doubt with a behavior on EVM8742 loopback mode.

In according to test the communication I am writing some bytes to simulate commands in a real environment. Here is the bytes sequence being wrote by uart port: 0xFF 0xFF 0xFF 0xFF 0XFF 0X02 0x00 0x00.

In some tests I have all bytes in UART OUT pin in EVM, however in some tests the first byte is lost. This is not happen in a periodic way. See the images below to you verify this stranger behavioral.

First byte lost