Does anyone use assembler only with an ARM MCU?

I have only used assembler when working with MCU's. I can follow a C program but have not used it in any commercial product. Can anyone suggest a development platform to start off learning the ARM and...
Could you explain this assembly line to me?

Hi, I am learning ARM assembly code. The following is a Thumb disassembly from a short .c file: int main() { printf("Hardware test, finish testing.\n"); return 0; } 00000000 <main>: 0:...
Where is the register definition of DHCSR for Cortex-M4

The manual of Cortex-M4 defines the address of DHCSR but provides no information about the register format.
Unidentified hardfault on Arm Cortex-M4

I have a whole bunch of hardfault annotations - all of them show CFSR value as 0. I've tested the annotation mechanism with two intentional hardfaults (divide by zero and write through null pointer) and...
Does "LDRD" instruction cause "UNDEFINSTR" error on Cortex-M4?

Dear Experts, I'm working on a freertos project which is running at Cortex-M4 and I'm being troubled by a problme - hard fault. The following is my debugging process: I dump the registers in the...