Abstract: Aiming at the problems of the traditional text to speech (TTS) systems, such as poor realtime character, high utilization of hardware resources, low efficiency of highcapacity speech data processing, it proposes the use of the SmartFusion FPGA (Field Programmable Gate Array) as the platform of hardware development. A TTS system was designed, based on FPGA. Firstly, the FatFs file system was transplanted to the CortexM3 hardcore of FPGA with the chip integrated. Then, hardware and software were made to work cooperatively, CortexM3 hardcore and FatFs file system were responsible for finding voice files and doing software analysis, and FPGA hardware was used to read the text contents and play the voice. Experimental results show that the TTS system has higher efficiency of processing voice files, shorter time of TTS conversion, and clear and fluent playback of the voice. The TTS system is stable and easy to implement.

Key words: SmartFusion FPGA, text to speech, FatFs file system, CortexM3 hardcore