How to burn the KT148A voice chip into the chip through the serial port and the tools on the computer

1.0 KT148A programming principle introduction

KT148A voice chip how to burn voice into the chip, need to use serial port and computer tools here

The required tools are as follows:

1. PC-side audio compression software---we provide---the purpose is to convert specific mp3 or wav audio files into files that KT148A can recognize
2. USB to TTL serial port tool---recommended to use CH340G USB to TTL module---very versatile and easy to use on the market
3. PC-side download tool software---we provide---the purpose is to download the voice file into the chip

1.1 Step 1 - Generate Audio File

1. This can generate mp3 or wav files by TTS synthesis software.You can also find live recordings, etc.

2. After obtaining these audio files, you can listen to the effect yourself

3. The effect of the audio must be completed in this step, including, trimming, removing the head and tail, adjusting the volume, etc.

1.2 Step 2 - Convert Audio Files

1. Use the tool software provided by us, the format can only choose F1A, and no other format can be selected, otherwise the converted file cannot be played

2, the sampling rate and code rate, you can choose flexibly, generally recommend "sampling rate 16K", code rate 6K, the effect isvery good

If space allows, feel free.If there are more voices, it is recommended to use "sampling rate 8K, bit rate 8K"

3. Add files, select the output directory, and finally click Convert

1. He will generate the original audio file into a file in xxx.f1a format, note that this file cannot be played on the computer, it can only be downloaded to the chip to decode and play

1.3 Step 3--Download audio using serial download tool

1. Be sure to short-circuit pin 5 of the chip to the ground before powering it on. When you hear a "beep" from the speaker, release it.

2. At this time, the chip will automatically enter the download state.CH340G USB to TTL module is recommended

3. Connect the serial port module to the computer. The TX of USB to TTL is connected to pin 2 of the chip, and the RX of USB to TTL is connected to pin 3 of the chip.Then together.

4. Click on the upper computer, open the serial port, the baud rate is fixed at 115200, select the import file, and then click "Download All", wait for the completion5. Note that after the download is complete, you can use the chip's pin 4 to trigger it to listen to the downloaded sound file

1.4 The complete test environment is as follows

Here is also the test board using the KT148A chip

Plus CH340G usb to ttl module

This builds a minimal system for testing