MSP430FR2512: Problem with I2C in Design Center, no "HID connected" seen

I go through the CAPT_BSP.C looking for clues (I use MSP430FR2512IPW16R now, in the EVM430-CAPMINI it is of course the 20-pin QFN, but the pinout seems to be wrong, does the BSP have support for the TSSOP model?

Hi Sebastian,

What pins on the FR2512 are you trying to use for communicating with the GUI? If you are using I2C, the default pins are P1.2 and P1.3.  You will also need to select an IRQ pin to use.  You can select the pin in the CAPT_commConfig.h file.  Make sure you configure these pins in the BSP.c file according to their function (PSEL registers).

SDA = P1.2, SCL = P1.3, IRQ = 2.1 (due to layout reasons, but reconfigured in CAPT_commConfig.h as you say), do I need to change something in the BSP as well? 

As per the other post, https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/969610/msp430fr2512-bulk_i2c-available:

It appears to be insufficient support of the TSSOP version.

Best regards,

Sebastian

So, just to make sure :

SYSCFG2 |= USCIBRMP;

// P1.0: OUTPUT LOW
// P1.1: OUTPUT LOW
// P1.2: OUTPUT LOW
// P1.3: OUTPUT LOW
// P1.4: UCA0 UART TXD if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT), else OUTPUT LOW
// P1.5: UCA0 UART RXD if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT), else OUTPUT LOW
// P1.6: OUTPUT LOW
// P1.7: OUTPUT LOW
#if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT)
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN6 | GPIO_PIN7);
P1SEL0 = (GPIO_PIN4 | GPIO_PIN5);
P1SEL1 = (0);
#else
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN4 | GPIO_PIN5 | GPIO_PIN6 | GPIO_PIN7);
P1SEL0 = (GPIO_PIN2 | GPIO_PIN3);
P1SEL1 = (0);

Is this correct?

Thanks for the response.

So, I made a brand new project in design center for the MSP430FR2512IPW16R, 2 simple self buttons, i2c bulk.

They are connected to cap0.2 and cap0.3, i have IRQ on P2.1, wake up on prox, LPM3, force LPM4 in wake on prox.

CAPT_CommConfig.h

#ifdef __MSP430FR2522__ // MSP430FR2522
#define I2CSLAVE__REQ_POUT (P2OUT)
#define I2CSLAVE__REQ_PDIR (P2DIR)
#define I2CSLAVE__REQ_MASK (BIT4)
#else // MSP430FR2633, MSP430FR2533, MSP430FR2632, MSP430FR2532
#define I2CSLAVE__REQ_POUT (P2OUT)
#define I2CSLAVE__REQ_PDIR (P2DIR)
#define I2CSLAVE__REQ_MASK (BIT1)
#endif

CAPT_BSP.c

#if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT)
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN6 | GPIO_PIN7);
P1SEL0 = (GPIO_PIN4 | GPIO_PIN5);
P1SEL1 = (0);
#else
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 ); //two outputs for setting button state, similar to LED on captivate-mini
P1SEL0 = (0);
P1SEL1 = (GPIO_PIN2 | GPIO_PIN3);
#endif

#if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT)
P2OUT = (GPIO_PIN4);
P2DIR = (GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN4);
P2SEL0 = (0);
P2SEL1 = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN5 | GPIO_PIN6);
#else
P2OUT = (GPIO_PIN1);
P2DIR = (GPIO_PIN1);
P2SEL0 = (0);
P2SEL1 = (0);
#endif

I set a break point on I2CSlave_setRequestFlag, it triggers during wake up from prox.

Only released from time out, never read.

I have tripple checked wiring, continuity checked and check for correct pulls.

I also hooked up the UART and tested it using the captivate-mini SW, it works, but I want the i2c to work.

If you do believe I have done something wrong, please generate a project, adjust the bsp and commconfig and send back to me .

Best regards,

Sebastian

Thanks for the response.

So, I made a brand new project in design center for the MSP430FR2512IPW16R, 2 simple self buttons, i2c bulk.

They are connected to cap0.2 and cap0.3, i have IRQ on P2.1, wake up on prox, LPM3, force LPM4 in wake on prox.

CAPT_CommConfig.h

#ifdef __MSP430FR2522__ // MSP430FR2522
#define I2CSLAVE__REQ_POUT (P2OUT)
#define I2CSLAVE__REQ_PDIR (P2DIR)
#define I2CSLAVE__REQ_MASK (BIT4)
#else // MSP430FR2633, MSP430FR2533, MSP430FR2632, MSP430FR2532
#define I2CSLAVE__REQ_POUT (P2OUT)
#define I2CSLAVE__REQ_PDIR (P2DIR)
#define I2CSLAVE__REQ_MASK (BIT1)
#endif

CAPT_BSP.c

#if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT)
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN6 | GPIO_PIN7);
P1SEL0 = (GPIO_PIN4 | GPIO_PIN5);
P1SEL1 = (0);
#else
P1OUT = (0);
P1DIR = (GPIO_PIN0 | GPIO_PIN1 ); //two outputs for setting button state, similar to LED on captivate-mini
P1SEL0 = (0);
P1SEL1 = (GPIO_PIN2 | GPIO_PIN3);
#endif

#if (DEFAULT_OSC_SELECTION == CS_XT1CLK_SELECT)
P2OUT = (GPIO_PIN4);
P2DIR = (GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN4);
P2SEL0 = (0);
P2SEL1 = (GPIO_PIN0 | GPIO_PIN1 | GPIO_PIN5 | GPIO_PIN6);
#else
P2OUT = (GPIO_PIN1);
P2DIR = (GPIO_PIN1);
P2SEL0 = (0);
P2SEL1 = (0);
#endif

I set a break point on I2CSlave_setRequestFlag, it triggers during wake up from prox.

Only released from time out, never read.

I have tripple checked wiring, continuity checked and check for correct pulls.

I also hooked up the UART and tested it using the captivate-mini SW, it works, but I want the i2c to work.

If you do believe I have done something wrong, please generate a project, adjust the bsp and commconfig and send back to me .

Best regards,

Sebastian

Hi Sebastian,

Not exactly - see the table above for eUSCIB0?  In order to use P1.2, P1.2 you want SYSCF2 &= ~USCIBRMP.  By default, this bit is cleared at POR.  SYSCFG2 |= selects eUSCIB0 but on pins P2.5, P2.6.

Regarding the I2CSlave_setRequestFlag, once this is set by the software, the host (CAPT-PGMR) must respond to the interrupt and start an I2C bus transaction to read the data, else the I2CSlave driver's timeout will reset the bus.  If you are not seeing this activity then make sure in the GUI you select BULKI2C and click the CONNECT button.  This will send a command down to the CAPT-PGMR to switch to I2C mode.  Do you have an o-scope or logic probe to check the SDA and SCL lines?  Verify they are pulled up to 3.3v.

Looking at your schematic, I would use the following assignments in your BSP.C

    // P1.0: INPUT
    // P1.1: INPUT
    // P1.2: UCB0 I2C SDA
    // P1.3: UCB0 I2C SCL
    // P1.4: OUTPUT LOW
    // P1.5: OUTPUT LOW
    // P1.6: INPUT (CAP0.2)
    // P1.7: INPUT (CAP0.3)
    P1OUT  = (0);
    P1DIR  = (GPIO_PIN4 | GPIO_PIN5);
    P1SEL0 = (GPIO_PIN2 | GPIO_PIN3);
    P1SEL1 = (0);

    // P2.0: OUTPUT LOW
    // P2.1: IRQ (OPEN DRAIN)
    // P2.2: OUTPUT LOW
    P2OUT  =  (0);
    P2DIR  =  (GPIO_PIN0 | GPIO_PIN2);
    P2SEL0 =  (0);
    P2SEL1 =  (0);

I also notice in your schematic that you have a 4.7uF connected to VREG?  This must be a 1.0uF only.

// Re-map EUSCI B0 pins to secondary locations
// This frees up CapTIvate IOs
//
SYSCFG2 &= ~USCIBRMP;
// SYSCFG2 |= USCIBRMP;

// P1.0: OUTPUT LOW
// P1.1: OUTPUT LOW
// P1.2: OUTPUT LOW

I did this now, did nothing.