Hi, I'm Ganapathy, I have rich experience in writing ARM assembly, not just ARM, I can write MIPS, x86, MSP assembly. I have developed projects completely in ARM assembly like LCD, keypad based user entry system, if you want, message me, I can share the code. I have also done couple of ARM assembly projects on STM32F103RB controller for another client, you can check my reviews for that(I had some bad projects in recent, but I can guarantee, you're project will be delivered on time).
Also I have the STM32F103RB board, with ST-link V2 debugger, can write assembly in keil, GNU assemblers
Contact me if you are interested
Thank you