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[参考译文] MSPM0G1106：ds1307 Rx 错误

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Guru**** 1788580 points
请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1403022/mspm0g1106-ds1307-rx-error

器件型号：MSPM0G1106

工具与软件：

当我使用德州处理器更改了 DS1307数据并使用 Arduino 进行了检查时、我​​向正确的寄存器分配了正确的值。 但当我想在德克萨斯学习时,我遇到了下图。

uint8_t readSecondsFromDS1307 (void)｛
 uint8_t 秒；
  uint8_t regAddr =秒；

// DS137den saniye register'ının ó n adresini gönder ñ o.
DL_I2C_fillControllerTXFIFO (I2C_INST、&regAddr、1)；

while (！ (DL_I2C_getControllerStatus (I2C_INST)和 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))；
秒= DL_I2C_receiveControllerData (I2C_INST)；


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

// Okunan saniyeleri Bcd'den çevir formata ondalık ve döndür
//返回 bcdToDec (秒)；
返回秒数；
}

  • 0
    TI__Guru**** 1788580 points
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

    您为什么要开始一个新主题？

    您必须告诉 DS1307要读取的寄存器。 fillControllerTXFIFO 不发送任何字节。 以下是 TI 示例中的相关代码： 

    /*
     * 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);

    此外、确保屏蔽掉 CH 位。