Hi,  Sorry if this is a long thread but i'm really confused.

I program for AVR MCUs and also know about Arduino, I can program for different ATMEL MCUs with looking at datasheets, And i also programmed a few basic stuff on Cortex-M3 LPC1768, without…

as we know supervisor mode is priviliged and user is not. at reset time in debugging mode, i read the cpsr it is 0x1d3 means in supervisor mode, so i can change CPSR so i changed it to 0x1d0 which is user mode, since user mode is unpriviliged so i must…

Hi, I make a software for Cortex-A9 and Cortex-M4 (both uni-processor system).

Question.

Is 64bit-aligned STRD(64bit memory access) atomic ?

(I know tha It is not atomic, but i don't know behavior.)

For example:

LDR R2,=buff

mov R0, #1

mov R1, #2

STRD R0…

Construct the following null terminated string in code area (i. e. in ROM)

str         DCB       “p1er3fec6tst1r2an5ge7rs8”.0

Write an assembly program that will count and…

Hi All,

Could anyone please tell me which generic register/location in memory can be used for storing a bit value which will not get reset after a CPU reset? I need the register to hold the value after a CPU reset so that I can know if a reset has happened…

Hi,

I need some clarification about which one is better either Cortex-M3 or -M4. Which one is present trending and which one having good future.

Thanks in advance.

In the DSP lib files like arm_conv_f32, arm_fir_f32, the algorithm implementation in Cortex-M3/M4 and in Cortex-M0 is different. i.e., loop unrolling is used in M3/M4 and it is not used in M0.

Pls tell me the reason behind it. Is there any advantage of…