SYN6288 Speech Synthesis Broadcast Module

The SYN6288E Chinese speech synthesis chip is a mid-to-high-end speech synthesis chip with more natural effects, launched by Beijing Yuantian Technology Co., Ltd. in early 2010, based on the more cost-effective SYN6288 chip with a modified package. The SYN6288E receives text data to be synthesized through an asynchronous serial port (UART) communication method, realizing the conversion of text to speech (or TTS speech).

Module Source

Purchase link: https://item.taobao.com/item.htm?spm=a230r.1.14.41.7bb74e15T8dQgB&id=633248893415&ns=1&abbucket=12

Other links for the same module:

https://detail.tmall.com/item.htm?abbucket=0&id=626679473209&ns=1&skuId=4615245602143&spm=a21n57.1.0.0.acc5523cluUkQ0

https://detail.tmall.com/item.htm?abbucket=0&id=636100867675&ns=1&spm=a21n57.1.0.0.acc5523cluUkQ0

Materials download: https://pan.baidu.com/s/1Kb8RA9aksd3o8Q-A8WqmNA Extraction code: 1234

Specifications

Input voltage: 2.4V~5.1V Rated current: 2.0uA~280mA Control method: Serial port

View Materials

For voice broadcast control, as long as the serial port is configured, and data is sent according to the command frame format required by the data manual, the broadcast function can be realized.

Note! This module can only perform voice broadcast and does not have voice recognition capabilities! It also cannot record.

Porting Process

Pin Selection

Port to Project

Our goal is to port the example to the ESP32-S3 dev board. Complete driver code has been provided for you. Follow the steps below to complete the porting. For detailed instructions on creating folders and new .c and .h files, refer to section 1.4.2 in the [DHT11 Temperature and Humidity Sensor] chapter; we will not repeat it here. Just note that here we change the file names bsp_dht11.c and bsp_dht11.h to bsp_syn6288.c and bsp_syn6288.h, and the folder name to SYN6288.

Write Code

In the file bsp_syn6288.c, write the following code.

/*
 * LCSC-Openkits (LCKFB) software and hardware materials and related expansion board software and hardware materials are all open source on the official website.
 * Dev board official website: www.lckfb.com
 * Technical support resides on the forum; any technical questions are welcome for exchange and learning at any time.
 * LCKFB Forum: club.szlcsc.com
 * Follow our Bilibili account: [LCSC-Openkits (LCKFB)] to keep up with our latest updates!
 * We do not make money by selling boards; we take cultivating engineers as our mission.
 * Change Logs:
 * Date           Author       Notes
 * 2024-01-16     LCKFB-lp     first version
 */
#include "bsp_syn6288.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"

#define SYN6288RX_LEN_MAX 255

unsigned char SYN6288RX_BUFF[SYN6288RX_LEN_MAX];
unsigned char SYN6288RX_LEN = 0;

void delay_ms(unsigned int ms)
{
    vTaskDelay(ms / portTICK_PERIOD_MS);
}
void delay_us(unsigned int us)
{
    ets_delay_us(us);
}
void delay_1ms(unsigned int ms)
{
    vTaskDelay(ms / portTICK_PERIOD_MS);
}
void delay_1us(unsigned int us)
{
    ets_delay_us(us);
}
/******************************************************************
 * Function Name: SYN6288_GPIO_Init
 * Function Description: SYN6288 pin initialization
 * Function Parameters: band_rate GPS communication baud rate
 * Function Return: None
 * Author: LC
 * Notes: Default baud rate is 9600
******************************************************************/
void SYN6288_GPIO_Init(uint32_t band_rate)
{
    //Define the serial port configuration structure, must be assigned initial values, otherwise it cannot be implemented
    uart_config_t uart_config={0};

    uart_config.baud_rate = band_rate;                  //Configure baud rate
    uart_config.data_bits = UART_DATA_8_BITS;           //Configure data bits to 8 bits
    uart_config.parity = UART_PARITY_DISABLE;           //Configure parity check as not required
    uart_config.stop_bits = UART_STOP_BITS_1;           //Configure stop bit as one bit
    uart_config.flow_ctrl = UART_HW_FLOWCTRL_DISABLE;   //Disable hardware flow control

    //Load the above parameters
    uart_param_config(BSP_SYN6288_USART, &uart_config);

    //Bind pins  TX RX RTS=not used CTS=not used
    uart_set_pin(BSP_SYN6288_USART, BSP_SYN6288_TX_PIN, BSP_SYN6288_RX_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);

    //Install serial port driver
    uart_driver_install(BSP_SYN6288_USART, SYN6288RX_LEN_MAX-1, SYN6288RX_LEN_MAX-1, 0, NULL, 0);

    //Create serial port 2 receive task
    xTaskCreate(BSP_SYN6288_Handler, "BSP_SYN6288_Handler", 1024*2, NULL, configMAX_PRIORITIES, NULL);

}

/******************************************************************
 * Function Name: SYN6288_Send_Bit
 * Function Description: Send a single character to SYN6288
 * Function Parameters: ch character to send
 * Function Return: None
 * Author: LC
 * Notes: None
******************************************************************/
void SYN6288_Send_Bit(unsigned char ch)
{
    uart_write_bytes(BSP_SYN6288_USART, (const char*)&ch, 1);
}

/******************************************************************
 * Function Name: SYN6288_send_String
 * Function Description: SYN6288 send string
 * Function Parameters: str string to send
 * Function Return: None
 * Author: LC
 * Notes: None
******************************************************************/
void SYN6288_send_String(unsigned char *str)
{
    uart_write_bytes(BSP_SYN6288_USART, (const char*)str, strlen( (const char*)str ));
}
//Get the data received by serial port
unsigned char *Get_SYN6288RX_BUFF(void)
{
    return SYN6288RX_BUFF;
}

//Clear the data received by serial port
void Clear_SYN6288RX_BUFF(void)
{
    //UART ring buffer flush. Discards all data in the UART RX buffer, ready for next reception
    uart_flush(BSP_SYN6288_USART);
    SYN6288RX_LEN = 0;
}

/************************************************************
 * Function Name: SYN6288_Send_Cmd
 * Function Description: Send command to SYN6288
 * Parameters:
 * [CmdType=Command word]                Available parameters:
 *                                                0x01        Speech synthesis command
 *                                                0x31        Set baud rate (default 9600)
 *                                                0x02        Stop synthesis command
 *                                                0x03        Pause synthesis command
 *                                                0x04        Resume synthesis command
 *                                                0x21        Chip status query command
 *                                                0x88        Chip enters low power mode
 * [CmdPar=Command parameter]          Available parameters:
 *                                                When the decimal value of the upper 5 bits of the byte is 0, it means no background music is added
 *                                                When the decimal value of the upper 5 bits of the byte is 1~15, it represents the number of the selected background music
 *                                                When the decimal value of the lower 3 bits of the byte is 0~3, and the command word is speech synthesis command, it respectively represents setting the text to GB2312 format, GBK format, BIG5 format, UNICODE format;
 *                                                When the decimal value of the lower 3 bits of the byte is 0~2, and the command word is set baud rate, it respectively represents setting the baud rate to 9600, 19200, 38400;
 * [text=Text to broadcast]

 * Return value: 0=Send successfully
 * Notes:

 * When a control command frame is received, the chip will send a 1-byte status return to the host computer, and the host computer can judge the current working status of the chip based on this return
 * Initialization successful return                     0X4A
 * Correct command frame received return                0x41
 * Unrecognized command frame received return           0x45
 * Chip broadcasting status return                      0x4E
 * Chip idle status return                              0x4F
*************************************************************/
unsigned char SYN6288_Send_Cmd(uint8_t CmdType, uint8_t CmdPar, uint8_t *text)
{
        unsigned char frame_header = 0XFD;     //Frame header
        unsigned int Text_Len = strlen((const char*)text);//Length of text to send
        unsigned int Data_Len = Text_Len + 3;     //Data area length; 3=frame header, frame tail and XOR check
        unsigned char Xor_Check = 0;     //XOR check storage
        unsigned char Send_Buff[210];    //Command frame to send, max 206 bytes
        uint8_t i = 0;

        Send_Buff[0] = frame_header;    //Frame header
        Send_Buff[1] = Data_Len>>8;     //High bit first
        Send_Buff[2] = Data_Len&0x00ff; //Low bit first
        Send_Buff[3] = CmdType;         //Command word
        Send_Buff[4] = CmdPar;          //Command data
        sprintf((char*)Send_Buff+5, "%s", text );

        //Send data
        for( i = 0; i < Text_Len+5; i++ )
        {
                Xor_Check = Xor_Check ^ Send_Buff[i];//Perform XOR check on each data and save
                SYN6288_Send_Bit( Send_Buff[i] );//Send data
        }
        SYN6288_Send_Bit( Xor_Check );//Send the last bit: XOR check data

        return 0;
}

/******************************************************************
 * Function Name: BSP_SYN6288_Handler
 * Function Description:
 * Function Parameters: None
 * Function Return: None
 * Author: LC
 * Notes: None
******************************************************************/
void BSP_SYN6288_Handler(void)
{
    while(1)
    {
        SYN6288RX_LEN = uart_read_bytes(BSP_SYN6288_USART, SYN6288RX_BUFF, SYN6288RX_LEN_MAX - 1, 100 / portTICK_PERIOD_MS);
        if( SYN6288RX_LEN > 0 && SYN6288RX_LEN == 0)//If data length is greater than 0, data has been received
        {
            SYN6288RX_BUFF[SYN6288RX_LEN] = '\0';//Set the last bit of serial port data to 0 to form a string
        }
        delay_ms(100);
    }

}

In the file bsp_syn6288.h, write the following code.

/*
 * LCSC-Openkits (LCKFB) software and hardware materials and related expansion board software and hardware materials are all open source on the official website.
 * Dev board official website: www.lckfb.com
 * Technical support resides on the forum; any technical questions are welcome for exchange and learning at any time.
 * LCKFB Forum: club.szlcsc.com
 * Follow our Bilibili account: [LCSC-Openkits (LCKFB)] to keep up with our latest updates!
 * We do not make money by selling boards; we take cultivating engineers as our mission.
 * Change Logs:
 * Date           Author       Notes
 * 2024-01-16     LCKFB-lp     first version
 */
#ifndef _BSP_SYN6288_H
#define _BSP_SYN6288_H

#include <stdio.h>
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/uart.h"
#include "driver/gpio.h"
#include "driver/i2c.h"
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "freertos/queue.h"
#include <inttypes.h>
#include "sdkconfig.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "rom/ets_sys.h"
#include "esp_system.h"
#include "driver/gpio.h"
#include "driver/spi_master.h"
#include "driver/spi_common.h"
#include "hal/gpio_types.h"
#include "driver/ledc.h"
#include "driver/mcpwm.h"
#include "esp_adc/adc_cali_scheme.h"
#include "esp_adc/adc_cali.h"
#include "driver/adc.h"
#include "esp_adc_cal.h"
#include "string.h"

#define BSP_SYN6288_TX_PIN      1  // Serial port TX pin
#define BSP_SYN6288_RX_PIN      2  // Serial port RX pin

#define BSP_SYN6288_USART       UART_NUM_2      // Serial port 2

void SYN6288_GPIO_Init(uint32_t band_rate);
unsigned char SYN6288_Send_Cmd(uint8_t CmdType, uint8_t CmdPar, uint8_t *text);
void BSP_SYN6288_Handler(void);
#endif

Porting Verification

In the main function of your project, write the following code.

/*
 * LCSC-Openkits (LCKFB) software and hardware materials and related expansion board software and hardware materials are all open source on the official website.
 * Dev board official website: www.lckfb.com
 * Technical support resides on the forum; any technical questions are welcome for exchange and learning at any time.
 * LCKFB Forum: club.szlcsc.com
 * Follow our Bilibili account: [LCSC-Openkits (LCKFB)] to keep up with our latest updates!
 * We do not make money by selling boards; we take cultivating engineers as our mission.
 * Change Logs:
 * Date           Author       Notes
 * 2024-01-16     LCKFB-lp     first version
 */
#include <stdio.h>
#include "bsp_syn6288.h"
#include "string.h"
#include "esp_private/esp_task_wdt.h"
#include "esp_private/esp_task_wdt_impl.h"

int app_main(void)
{

        esp_task_wdt_deinit();
        SYN6288_GPIO_Init(9600);
        printf("Start.......\r\n");
        vTaskDelay(1000 / portTICK_PERIOD_MS);
        SYN6288_Send_Cmd(0x01,0x00,(uint8_t *)"LCKFB");

        while(1)
        {
                vTaskDelay(1000 / portTICK_PERIOD_MS);

        }

}

Driver code:

File Download

📌 Materials Download Center (Click to Jump)

📌 In the Materials Download Center -> Module Porting Materials Download, inside the compressed package of this chapter.