MSPM0G3507: I2C Master Controller Multiple Data (more the 8 bytes) Transfer Polling Example

Hi, Anthony

1. i2c_controller_rw_multibyte_fifo_interrupts

    This code example handle 16 bytes and 8 TXFIFOs very well.

    You can have a look.

2. i2c_controller_rw_multibyte_fifo_poll

    Base on this example, add some code to be compatible with multi-byte(> 8) sending function.

    Just add some code after SYSCFG_DL_init(); of i2c_controller_rw_multibyte_fifo_poll.c

    I didn't test this code, bug logic should be correct.

    SYSCFG_DL_init();

    /* Set LED to indicate start of transfer */
    DL_GPIO_setPins(GPIO_LEDS_PORT, GPIO_LEDS_USER_LED_1_PIN);

    gTxLen = I2C_TX_PACKET_SIZE;

    /*
     * Fill the FIFO
     *  The FIFO is 8-bytes deep, and this function will return number
     *  of bytes written to FIFO */
    gTxCount = DL_I2C_fillControllerTXFIFO(I2C_INST, &gTxPacket[0], gTxLen);

    /* Wait for I2C to be Idle */
    while (!(
        DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE))
        ;

    /* Send the packet to the controller.
     * This function will send Start + Stop automatically.
     */
    DL_I2C_startControllerTransfer(I2C_INST, I2C_TARGET_ADDRESS,
        DL_I2C_CONTROLLER_DIRECTION_TX, gTxLen);

    while (gTxCount < gTxLen) {
        //Waiting for txfifo empty
        while (!(DL_I2C_getRawInterruptStatus(I2C_INST) & DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_EMPTY));
        //clear interrupt
        DL_I2C_clearInterruptStatus(I2C_INST, DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_EMPTY);
        //Write more data to I2C FIFO
        gTxCount += DL_I2C_fillControllerTXFIFO(I2C_INST, &gTxPacket[gTxCount], gTxLen - gTxCount);
    }

    /* Poll until the Controller writes all bytes */
    while (DL_I2C_getControllerStatus(I2C_INST) &
           DL_I2C_CONTROLLER_STATUS_BUSY_BUS)
        ;

    /* Trap if there was an error */
    if (DL_I2C_getControllerStatus(I2C_INST) &
        DL_I2C_CONTROLLER_STATUS_ERROR) {
        /* LED will remain high if there is an error */
        __BKPT(0);
    }

    /* Wait for I2C to be Idle */
    while (!(
        DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE))
        ;

    /* Add delay between transfers */
    delay_cycles(1000);

Regards,

Helic