topic S12G128 LIN can't clear Interrupt Flag in S12 / MagniV Microcontrollers

S12G128 LIN can't clear Interrupt Flag

sufree — Sat, 01 Jul 2017 05:53:52 GMT

Hi,

I want to clear the Break Detect Interrupt Flag in SCI Alternative Status Register 1 (SCIASR1) by the following code ,I have set the AMAP=1,but it in vain,I don't know why .

if(0 != (SCI1ASR1&SCIASR1_BKDIF_MASK)) //=1
{
/* clear break detect interrupt flag */
//pSCI->sciasr1.byte|=SCIASR1_BKDIF_MASK;
SCI1ASR1_BKDIF=0x1;

state = RECV_SYN;
return;

}

Re: S12G128 LIN can't clear Interrupt Flag

danielmartynek — Mon, 03 Jul 2017 08:14:37 GMT

Hi,

What do you see on a scope, what do you receive?

I do not see any reason why this flag cannot be cleared unless it keeps receiving break characters. How do you generate a break character, using SCICR2[SBK]?

Regards,

Daniel

Re: S12G128 LIN can't clear Interrupt Flag

sufree — Mon, 03 Jul 2017 08:46:12 GMT

Hi ,thank you , because of i use a wrong way to generate a break character.