EXT driver - same pins on different GPIO ports

[DeusExMachina]

I have 2 buttons on GPIO A and C on port 3
And I want to use an IRQ on both of them

Code: Select all

static const EXTConfig extcfg = {
  {
    {EXT_CH_MODE_DISABLED, NULL},    
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_BOTH_EDGES | EXT_CH_MODE_AUTOSTART | EXT_MODE_GPIOA | EXT_MODE_GPIOC, extcb1},   
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL},
    {EXT_CH_MODE_DISABLED, NULL}
  }
};

How can I distinguish interrupt source (Port A or Port C) in callback function? Can I use 2 callbacks for Port A and PortC (it will be more convinient).

[Tectu]

The STM32 does not allow to use an external interrupt on the same pin but on different ports. You can only use one interrupt per pin, but not depending on which port.


~ Tectu

[DeusExMachina]

thank you