Real Time Computer Systems 3 Q3.1.1 Q1 R0 - 0x0000400 R1-2,R4,R6-9,R11-12 = 0x0000000 R3 = 0x8000000 R5 = 0x2000003C R10 = 0x08000ACC R13 = 0x20000638 = MSP R14 = 0xFFFFFFE9 R15 = 0x08000464 xPSR = 0x81000016
no PSP Mode Handler Privilege = Privileged Stack - MSP
PRIMASK - 0 Control = 0x00
Q3.1.1 Q2 R0 - 0x40020C00 - Address - 0x2000628 R1 - 0x00004000 - 0x2000062C R2 - 0x00000000 - 0x20000630 R3 - 0x40000000 - 0x20000634 R12 - 0x0000000 - 0x20000638 LR - 0x08000491 - 0x2000063C PC- 0x08000490 - 0x20000640 xPSR - 0x01006000 - 0x20000644
Q3.1.1 Q3 All Unchanged but R13 - 0x20000620 R15 - 0x08000466
Q4 R4 - 0x00000000 0x20000620 LR - FFFFFFE9
Q3.1.2
Q5 . 37.59mS Q6 . 15.4 - 11.4 = 4 Q7. 4.8 Demonstrator says he can’t see anything wrong with calc
12.5 of 25 PWM before ISR
7uS delay 19.5 of 32