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On powerup I want to read the cause of starting with the following code:
printf("\n\rPowerup Source [%04X]: ",RSIR); if(RSIR&(1<<0)) {printf("POR "); RSIR|(1<<0);} if(RSIR&(1<<1)) {printf("EXTR "); RSIR|(1<<1);} if(RSIR&(1<<2)) {printf("WDTR "); RSIR|(1<<2);} if(RSIR&(1<<3)) {printf("BODR "); RSIR|(1<<3);}
and get the following as output: Powerup Source [000B]: POR EXTR BODR
It remains the same on PowerOff/On or Reset. What's wrong with it? Peter
I have tried your code on MCB2300 with LPC2378 and it works as expected.
After Power-on Reset the value of RSIR = 0x03 and the register is cleared when writing 0x0F into it. Also after asserting External Reset the value in RSIR = 0x02 which is also correct.
It seems that on your HW the BODR bit is set (Brown-out detection). Maybe you have some problems with the power supply.
Thank you for your effort. I will have a look at my hardware. P.