TIDM-TMS570BMS: EM1402EVM

Xueyu Zhang

Part Number: TIDM-TMS570BMS

Hello,

I'm using the TMS570 and EM1402 for the battery active balancing. I modified the TMS570, and connected TMS570 with EM1402 beased on the design guide. However, I cannot open the GUI.

When I connect EM1402 directly to PC, the GUI is able to open, and the TX and RX on the EM1402 board has signals.

Then I connected EM1402 to TMS570 board, and and run the example code on code composer studio, the program is able to run, but the program does not receive any signal from the board:

Line 177: nRead == 0

Line 180: nTopFound == 0

I checked the signal on EM1402 board with oscilloscope; RX (J7-4) has signal, and TX (J7-5) does not have signal. And I cannot open the GUI whether when the program is runing or not.

over 6 years ago

0 QJ Wang over 6 years ago

TI__Guru**** 191946 points

Hello Xueyu,

The BMS example uses two NHET pins as UART to communicate with EM1402. You need to modify the TMS570LS0432 launchpad to do this.

Please refer to TI Design (page 7):

www.ti.com/.../tidubi0.pdf

0 Xueyu Zhang over 6 years ago in reply to QJ Wang

Prodigy 30 points

Hello,

Yes, I modified the TMS570 board. Below is the picture of the modified TMS570.

0 QJ Wang over 6 years ago in reply to Xueyu Zhang

TI__Guru**** 191946 points

Hello Xueyu,

Sorry, the NHET emulated UART is used to communicate with PC rather than EM1402 EVM. Is the NHET code programmed into the NHET RAM?

2806.HET_EMU.h 4353.HET_EMU_SCI.h 5611.HET_EMU.c 2605.HET_EMU_SCI.c 4062.het.c

0 Xueyu Zhang over 6 years ago in reply to QJ Wang

Prodigy 30 points

Hello,

I downloaded the NHET code and added them into the EM1402EVM example code.

Then I get errors when building the project. The errors are from file '8524.het.c', saying the identifier is not found. Below are the screen shots.

Thanks,

Xueyu

0 QJ Wang over 6 years ago in reply to Xueyu Zhang

TI__Guru**** 191946 points

Hello Xueyu,

Did you download the SW from this link?

If you downloaded the file from this link, the emulated SCI code should be included.

0 QJ Wang over 6 years ago in reply to QJ Wang

TI__Guru**** 191946 points

Hi Xueyu,

I recalled that the baundrate is 250kbps.

For emulated SCI, you only need those two source files:
HET_EMU_SCI.c
HET_EMU.c

and those 2 header files:
HET_EMU_SCI.h
HET_EMU.h

HET_EMU_SCI.c just defines a data array:
HET_MEMORY const HET_INIT0_PST[34] = {...}; -->those are the NHET instructions to emulate SCI.

This data array is programmed to NHET RAM by using:
(void)memcpy((void*)hetRAM1, (void*)HET_INIT0_PST, sizeof(HET_INIT0_PST)); --> defined in het.c

After program the data array to NHET RAM, the NHET instruction will execute after NHET is enabled (hetInit()).

Are launchpad and EM1402 connected correctly?

0 QJ Wang over 6 years ago in reply to QJ Wang

TI__Guru**** 191946 points

Hi Xueyu,

Have you solved the problem?

0 Elda Potter over 6 years ago in reply to QJ Wang

Intellectual 440 points

Dear Sir:

Please provide contact information (that is, how may I contact through direct message) to discuss the details of how you removed R8 and R9 and made the necessary connections. I will perform the soldering soon and want first hand knowledge of how it has been done.

Sincerely,

Elda Potter

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TIDM-TMS570BMS: EM1402EVM