Texas Instruments Hercules TMS570 I2C Slave

Matthias Niedermaier

Other Parts Discussed in Thread: HALCOGEN, TMS570LS3137, RM42L432

Hello,

I want to implement the TMS570 as an i2c slave, but there is no example to do this and i did not managed it by myself.

I configured the i2c with halcogen and also tried it by myself.

i2cInit();
/** - i2c out of reset */
i2cREG1->MDR = (1 << 5);
i2cSetOwnAdd(i2cREG1, own_add);
i2cSetSlaveAdd(i2cREG1, own_add);
/** - I2C out of reset */
i2cREG1->MDR |= I2C_RESET_OUT;

I tested some other things but with no success. The problem is that there is no ACK from the TMS570. Can someone post a example with TMS570 as an i2c slave?

Thanks and regards

MaTT

over 11 years ago

0 Haixiao Weng over 11 years ago

TI__Genius 13810 points

Go to http://processors.wiki.ti.com/index.php/RM46_CNCD

Search for I2C.

I have an example:

N2HET emulate I2C serve as the Master,

I2C peripheral serve as the slave.

Hope it helps.

Haixiao

0 Matthias Niedermaier over 11 years ago in reply to Haixiao Weng

Prodigy 120 points

Hello,

yes this is very interessiting to implement an I2C with N2HET, but I want to implement a I2C slave on an TMS570LS3137 and this mcu has an I2C interace. I manage to get it working as an master, but as an slave there is no ACK at the configured address.

Other Question: Is ist possible to implement I2C N2HET on an RM42L432? Because of the reduced HCLK frequency?

Thanks and Regards

MaTT

0 Haixiao Weng over 11 years ago in reply to Matthias Niedermaier

TI__Genius 13810 points

The example use built-in I2C as slave, NHET emulated I2C serve as I2C master, they talk with each other through blue wires.

IS that clear?

Implement I2C N2HET master on RM42L432 should have no problem. HCLK frequency does not matter, VCLK is the key.

Thanks,

Haixiao

0 Matthias Niedermaier over 11 years ago in reply to Haixiao Weng

Prodigy 120 points

Hello,

i now managed it that the i2c is doeing something. But I am not able to read from the I2C Bus, can you have a look at my

2021.RM42_I2C.zip

Thanks and regards

MaTT

0 Matthias Niedermaier over 11 years ago in reply to Matthias Niedermaier

Prodigy 120 points

Hello,

now I managed to read from a LM75 Sensor but SCI get stuck and i do not find my failure :( Can somone help me with this problem? (Attached is my Projekt)

8473.RM42_I2C.zip

Thanks and Regards

MaTT

0 Haixiao Weng over 11 years ago in reply to Matthias Niedermaier

TI__Genius 13810 points

MaTT,

Did you notice that you enabled the parity of SCI?

    /** - global control 1 */
    scilinREG->GCR1 = (uint32)((uint32)1U << 25U) /* enable transmit */
                    | (uint32)((uint32)1U << 24U) /* enable receive */
                    | (uint32)((uint32)1U << 5U)   /* internal clock (device has no clock pin) */
                    | (uint32)((uint32)(1U-1U) << 4U) /* number of stop bits */
                    | (uint32)((uint32)0U << 3U) /* even parity, otherwise odd */
                    | (uint32)((uint32)0U << 2U) /* enable parity */
                    | (uint32)((uint32)1U << 1U); /* asynchronous timing mode */

Here I modified it to 0, then set the Hypertermal to 9600, everything works fine. Did you get the HET emulate I2C work?

Regards,

Haixiao

0 Matthias Niedermaier over 11 years ago in reply to Haixiao Weng

Prodigy 120 points

Hello,

I still have Problems with the I2C Slave at the TMS570 (The TMS570 works as a slave). There is no ACK or something else from the TMS570 to the Master(Attached Project). Did I forgot to configure something?

7455.TMS570_I2C.zip

Thanks and regards

MaTT

0 Martin Valencia over 11 years ago in reply to Matthias Niedermaier

Guru 15175 points

Hello, excuse my English if mispronounced'm using a translator, I am very interested in your input I2C library for RM42, I also use that processor much I wonder if your libraries and work well?

0 Anthony F. Seely over 11 years ago in reply to Martin Valencia

TI__Guru 68970 points

Hi, I wouldn't consider this application report to be a library. It's probably got issues and the author isn't with us so really would be difficult to support it.

We do have a hardware I2C module on higher end parts and it may be worth your while to look at these products instead of RM42 if you need I2C.

Arm-based microcontrollers

Arm-based microcontrollers forum

Texas Instruments Hercules TMS570 I2C Slave