Question

我正在开发一个Arduino项目，我通过I2C通信接收消息。我有几个例程，程序花了很多时间而不返回。目前，我在发生中断时设置了一个中断标志，我基本上在几个地方检查这些功能，如果发生中断，我会返回。我想知道中断函数是否可以调用我的入口点函数。

所以这是我当前的中断函数

void ReceivedI2CMessage(int numBytes)
{
    Serial.print(F("Received message = "));
    while (Wire.available())
    {
        messageFromBigArduino = Wire.read();
    }
    Serial.println(messageFromBigArduino);

    I2CInterrupt = true;
}

并且在程序花费大部分时间的功能中，我必须在几个地方执行此操作

if(I2CInterrupt) return;

现在我想知道是否可以从我的ReceiveI2CMessage中调用我的入口点函数。我主要担心的是，这可能会导致内存泄漏，因为当中断发生时，我会将我正在执行的函数留下，并且我将回到程序的开头。

Answer 1

It is okay but not preferred. It is always safer to do less -- perhaps simply set a flag -- and exit interrupts as fast as possible. Then take care of the flag/semaphore back in your main loop. For example:

 private void jTable1MouseClicked(java.awt.event.MouseEvent evt) {                                     
    int SelectedRowIndex=jTable1.getSelectedRow();

    jComboBox2.addItem((String)jTable1.getValueAt(SelectedRowIndex, 0));
    jComboBox2.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 0));
    jComboBox3.addItem((String)jTable1.getValueAt(SelectedRowIndex, 1));
    jComboBox3.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 1));
    jTextField2.setText((String)jTable1.getValueAt(SelectedRowIndex, 2));
    jComboBox5.addItem((String)jTable1.getValueAt(SelectedRowIndex, 3));
    jComboBox5.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 3));
    jComboBox6.addItem((String)jTable1.getValueAt(SelectedRowIndex, 4));

    jComboBox6.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 4));
    jTextField6.setText((String)jTable1.getValueAt(SelectedRowIndex, 5));
    jComboBox14.addItem((String)jTable1.getValueAt(SelectedRowIndex, 6));
    jComboBox14.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 6));
    jTextField5.setText((String)jTable1.getValueAt(SelectedRowIndex, 7));
    jComboBox13.addItem((String)jTable1.getValueAt(SelectedRowIndex, 8));
    jComboBox13.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 8));
    jComboBox4.addItem((String)jTable1.getValueAt(SelectedRowIndex, 9));
    jComboBox4.setSelectedItem((String)jTable1.getValueAt(SelectedRowIndex, 9));
    jTextField3.setText((String)jTable1.getValueAt(SelectedRowIndex, 10));
    java.sql.Date date1 = new java.sql.Date(jDateChooser2.getDate().getTime());
    date1.setDate((int)jTable1.getValueAt(SelectedRowIndex, 11));
}

Then in your main loop:

volatile uint8_t i2cmessage = 0;  // must be volatile since altered in an interrupt 

void ReceivedI2CMessage(int numBytes) // not sure what numBytes are used for...
{
    i2cmessage = 1;  // set a flag and get out quickly
}

This achieves the goal of the interrupt, which is ideally to set a semaphore to be acted on quickly in the main loop.

Arduino中断函数可以调用另一个函数吗？

1 个答案: