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MSPM0G1106: ds1307 rx error

burak benderlioglu
Prodigy 115 points

Part Number: MSPM0G1106

Tool/software:

When I changed the DS1307 data with the TEXAS processor and checked it with Arduino, I assigned the correct values ​​to the correct register. But when I want to study in Texas, I encounter the following image.

uint8_t readSecondsFromDS1307(void) {
  uint8_t seconds;
   uint8_t regAddr = Seconds;

// DS1307'den saniye register'ının adresini gönder
DL_I2C_fillControllerTXFIFO(I2C_INST, &regAddr, 1);

while (!(DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE));

// 1 baytlık veri (saniyeler) okumak için kontrolcü transferini başlat
DL_I2C_startControllerTransfer(I2C_INST, DS1307_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, 1);


// Veri FIFO'ya gelene kadar bekle ve oku
while (DL_I2C_isControllerRXFIFOEmpty(I2C_INST));
seconds = DL_I2C_receiveControllerData(I2C_INST);


if (DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_ERROR) {
printf("I2C Okuma Hatası!\n");
}

// Okunan saniyeleri BCD'den ondalık formata çevir ve döndür
//return bcdToDec(seconds);
return seconds;
}

  • +1
    Guru 42795 points

    Why did you start a new topic?

    You have to tell the DS1307 which register you want to read from. fillControllerTXFIFO does not send any bytes. Here is the relevant code from the TI example:

    /*
     * Fill FIFO with data. This example will send a MAX of 8 bytes since it
     * doesn't handle the case where FIFO is full
     */
    DL_I2C_fillControllerTXFIFO(I2C_INST, &gTxPacket[0], I2C_TX_PACKET_SIZE);

    /* 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, I2C_TX_PACKET_SIZE);
        
    /* 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);

    /* Send a read request to Target */
    DL_I2C_startControllerTransfer(I2C_INST, I2C_TARGET_ADDRESS,
        DL_I2C_CONTROLLER_DIRECTION_RX, I2C_RX_PACKET_SIZE);

    Also make sure to mask out the CH bit.