Kinetis MicrocontrollersのトピックRe: Error reading Kinetis internal flash

Error reading Kinetis internal flash

kecart — Fri, 25 Apr 2014 11:42:53 GMT

I have written a bootloader for a Kinetis K61FN1M0 using CW MCU 10.6 and Processor Expert. Immediately after PE_low_level_init(); in main() I am calling a function that looks at some values at the top of the FLASH at location 0xFFF00. I get an error when I hit the instruction shown below at 00009ca4 that causes the code to .jump to the PE_ISR(Cpu_Interrupt) routine. Can anyone tell me why this might be happening? The Memory window of the IDE shows the expected values are at the location I am trying to read.

47	pAppDef = (APPLICATION_DEF_PTR)__AppInfo__;

00009c98: mov r3,#0xff00

00009c9c: movt r3,#0xf

00009ca0: str r3,[r7,#4]

48	if( pAppDef->InfoVersion != 0xFFFFFFFF )

00009ca2: ldr r3,[r7,#4]

00009ca4: ldr r3,[r3,#12]

00009ca6: cmp r3,#0xffffffff

00009caa: beq Check_App_CSM+0xf2 (0x9d46); 0x00009d46

Re: Error reading Kinetis internal flash

ZhangJennie — Tue, 29 Apr 2014 08:52:29 GMT

can you please send me the demo project and the problem screenshot?

Re: Error reading Kinetis internal flash

carlos_neri — Tue, 13 May 2014 16:41:17 GMT

I would check the value of R3 just when 0x9CA4 will be executed.

Looking at the base address, R3+12 would be 0xFFF0C which seems to be good, but my current guess is that probably the address calculated isn't 0xFFF0C but something non-even that causes a misaligned access?