UCD3138FW_LLC: UCD3138FW_LLC:Where should I add the DTC interrupt processing?

Hello Yukio-San,

You can either add the DTC process to fast_interrupt() in interrupts.c file or standard_interrupt() in standard_interrupt.c file.
For fast interrupt you have to enable the interrupt mask for fiq. Adding the following code snippet in your main.c would enable it.

disable_fast_interrupt();
//Configure FIQ
write_firqpr(0x00080000); // interrupt vector index 19 is assigned to DTC interrupt
//Enable interrupts
enable_fast_interrupt();
Once this is done you can write your interrupt process in fast_interrupt in interrupts.c file. An example code snippet is below.
void fast_interrupt(void)
{
{
register int32 fiq_number;
volatile Uint32 read_scrap;
fiq_number = CimRegs.FIQIVEC.all; // Clear on read
if(fiq_number == 19) // DTC interrupt index
{
//Interrupt process

}
read_scrap = CimRegs.INTREQ.all; //clear on read
//if needed clear FLAG bit in DTCSTAT register
}
}
For standarrd interrupt you have to enable the interrupt mask for irq. Adding the following code snippet in your main.c will enable it.
disable_interrupt();
//Configure IRQ
write_reqmask(0x00080000); // interrupt vector index 19 is assigned to DTC interrupt
//Enable interrupts
enable_interrupt();
Once this is done you can write your interrupt process in standard_interrupt in standard_interrupt.c file. An example code snippet is below.
void standard_interrupt(void)
{
{
register int32 irq_number;
volatile Uint32 read_scrap;
irq_number = CimRegs.IRQIVEC.all; // Clear on read
if(irq_number == 19) // DTC interrupt index
{
//Interrupt process

}
read_scrap = CimRegs.INTREQ.all; //clear on read
//if needed clear FLAG bit in DTCSTAT register
}
}

For more details please refer TI's app note "Using UCD7138 and UCD3138A for Advanced Synchronous Rectification Control" (www.ti.com/lit/an/slua737b/slua737b.pdf) section 5.2, and UCD3138 TRM (www.ti.com/lit/ug/sniu028d/sniu028d.pdf) page no. 532
Pease refer section 18 of TRM (www.ti.com/lit/ug/sniu028d/sniu028d.pdf) for more information on CIMINT module.

Regards
Hemanth