I am using a LPC55s28 and am tentatively trying to get secure boot working. I say tentative as it really doesn't feel like all thi info is there and it isn't even consistent in the UG UM11126.pdf
Eg pg141 fig 13 - the CMPA is at address 0x0003_E400 but on pg144 it is at 0x0009_E400!
I ran the following code (numbers changed to protect the innocent):
st = FFR_GetCustomerData(&my_flashInstance, (uint8_t *)CMPA, 0, 512);
// RKTH: 3e562d88 35880e0d 0be586a3 137e5e1b e77eb765 3280a8e8 fa58f463 80227fe5
CMPA[16] = 0x11111111;
CMPA[17] = 0x22222222;
CMPA[18] = 0x33333333;
CMPA[19] = 0x44444444;
CMPA[20] = 0x55555555;
CMPA[21] = 0x66666666;
CMPA[22] = 0x77777777;
CMPA[23] = 0x88888888;
st = FFR_CustFactoryPageWrite(&my_flashInstance, (uint8_t *)CMPA, false);
Now I cant connect to the board with the debugger nor is it running my blinky code.
What have I done wrong? I didn't do anything to actually enable secure boot or lock out the debugger (or did I!)
Actually looking at fig5 pg141 the least significant words of the ROTK are not shown. Should I not have programmed them?
