TMS320F28379D: How to Detect a Hard Reset on TMS320F28379D?

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Part Number: TMS320F28379D
Other Parts Discussed in Thread: TMS320F28377D

Tool/software:

Dear TI hello,

I have a client who asked me to investigate their product. They are using the TMS320F28377D, and it seems that a reset is occurring, which they cannot detect via CAN.

I connected a JTAG probe to monitor the code execution, and I noticed that the eCAP counter does not exceed 1000, even though it is clocked at 200 MHz, which leads me to suspect a hard reset.

I developed a code to monitor this behavior, but since a reset is occurring, I am not sure if I managed to capture it. Here is the code I developed:

#pragma DATA_SECTION(por_count, ".TI.ramfunc");
#pragma DATA_SECTION(xrsn_count, ".TI.ramfunc");
#pragma DATA_SECTION(wdrsn_count, ".TI.ramfunc");
#pragma DATA_SECTION(nmiwdrsn_count, ".TI.ramfunc");
#pragma DATA_SECTION(hwbistn_count, ".TI.ramfunc");
#pragma DATA_SECTION(hibresetn_count, ".TI.ramfunc");
#pragma DATA_SECTION(sccresetn_count, ".TI.ramfunc");

volatile Uint16 por_count = 0;
volatile Uint16 xrsn_count = 0;
volatile Uint16 wdrsn_count = 0;
volatile Uint16 nmiwdrsn_count = 0;
volatile Uint16 hwbistn_count = 0;
volatile Uint16 hibresetn_count = 0;
volatile Uint16 sccresetn_count = 0;

void check_reset_cause(void)
{
    Uint16 reset_cause = HWREGH(0x80); // Lire le registre RESC

    // Vérifier chaque bit et incrémenter le compteur correspondant
    if (reset_cause & 0x0001) por_count++;
    if (reset_cause & 0x0002) xrsn_count++;
    if (reset_cause & 0x0004) wdrsn_count++;
    if (reset_cause & 0x0008) nmiwdrsn_count++;
    if (reset_cause & 0x0020) hwbistn_count++;
    if (reset_cause & 0x0040) hibresetn_count++;
    if (reset_cause & 0x0100) sccresetn_count++;

    // Effacer les bits de reset pour éviter les faux positifs
    HWREGH(0x80) = reset_cause;
}

How can I reliably detect a reset on the TMS320F28377D, knowing that my eCAP counter does not exceed 1000 and I suspect a hard reset?

Thank you in adance

9 months ago