"MSP432P401R" How to use the keyboard

[CHTUZKI]

I use MSP432P401R to run grblhal. I want to ask how MSP432P401R connects to the keyboard, or how MSP432P401R connects to the "GRBL_MPG_DRO_BoosterPack" project. I can't find the relevant instructions.

At present, I only connect the serial port of the "GRBL_MPG_DRO_BoosterPack" project to MSP432P401R, and my keyboard is now connected to the "GRBL_MPG_DRO_BoosterPack" project.

I see that the "GRBL_MPG_DRO_BoosterPack" project has a second I2C interface to relay keyboard data. I have connected this I2C interface with MSP432P401R, Press the button, nothing happens.

I see the following lines of code in the driver. c file of MSP432P401R:

#if I2C_STROBE_ENABLE
                case PinGroup_Keypad:
                    if(i2c_strobe.callback)
                    {
                        i2c_strobe.callback(0, !BITBAND_PERI(I2C_STROBE_PORT->IN, I2C_STROBE_PIN));
                    }
                    break;
#endif

I2C_STROBE_PIN Where should be connected? Does this pin tell MSP432P401R that the key is pressed now ?

If my "GRBL_MPG_DRO_BoosterPack" project is now in MPG mode, will the keyboard function be turned off ?

Can you give me some help? Thank you very much.

[terjeio]

Where should the PIN be connected?

To the Tiva PD2 pin, I'll update the I2C (P10) labelling for it.

Does this pin tell MSP432P401R that the key is pressed now ?

Yes.

If my "GRBL_MPG_DRO_BoosterPack" project is now in MPG mode, will the keyboard function be turned off ?

No, but keypresses will not be forwarded via I2C, they are translated to gcode commands and sent via the UART port to the MSP432.

---

A side note: with the keypad plugin active in the MSP432 then you can in fact connect the MSP430 keypad processor directly to the MSP432 (SDA/SCL/I2C strobe) - bypassing the Tiva MPG.

[CHTUZKI]

Thank you for your answer. Now everything is normal. 🎉🎉🎉