Kt148a voice chip IC software reference code c language, first-line serial port

Catalog

3.1  Communication format

3.2  Communication command

4.2  Communication examples F3-- Group play

4.3  Communication command F0 describe 【 Ultra-low power consumption 】

4.4  Communication details and precautions

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First line communication protocol

     At present, the chip supports one-line serial communication protocol , It is also determined by the time width of high and low levels 0 perhaps 1 .

3.1  Communication format

 

Be careful ： The high level must be in front , Low level is in the rear .

Recommended 200us：600us. Value range ： narrow pulse =[150us--400us]     Wide pulse [500us--1000us]

Pay attention to 3:1 and 1:3 Level proportion to ensure stable communication .

Pay attention to the beginning 6ms Low level , During initial commissioning , Try to use an oscilloscope or logic analyzer to see , Error in 10% Both sides can accept

1、0x00H To 0xDFH Define a function code for the voice address code .

2、0xFE Is the voice stop code , Send this command to stop playing voice .

3、 The interval between codes must be greater than 20ms

3.2  Communication command

NO. Serial number	Data code	Voice Speech meter
0	0x00	Retain
1	0x01	voice 1
2	0x02	voice 2
3	0x03	voice 3
		……
224	0xE0~0xEF	15 Level volume ,0xE0H Is the minimum volume 0,0xEFH Maximum volume  ( Power on default ). （ If you need to adjust the volume , Then send the volume code first , Partition 20ms Send the voice code again ）
225	0xF0	To turn it off . Enter the ultra-low power consumption state =1.7uA, See 4.3 chapter After entering this state , You also need a control chip , You need to lower it first DATA foot 40ms The purpose is to wake up the chip , You can send commands to control normally ,
242	0xF2	Cyclic code  -- See 4.1 chapter If you need to cycle a sound , Then send the voice code first , Partition 20ms Retransmit cyclic code ）
243	0xF3	Code play  -- See 4.2 chapter F3H+ Voice address A, Voice address B, Voice address C,…   At the playback address A When , Don't interrupt after receiving the code , End of play A, Just play it B, And then play C….F3 And address 20ms Time delay of . And one group of concatenated addresses and the next group of addresses need 40ms Time delay （“F3+ Voice address ” For a set of concatenated addresses ）
254	0xFE	Stop code

/*******************************************************************************
 -  Function description ： One line communication data transmission 【 Pay attention to debugging , Use an oscilloscope or logic analyzer to check the pulse width 】
 -  Subordinate module ： Inside 
 -  Parameter description ：dat =  Data to be sent 
 -  Return instructions ： nothing 
********************************************************************************/
#define IO1_HIGH()		JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT |=  BIT(6);
#define IO1_LOW()		JL_PORTA->DIR &= ~BIT(6);JL_PORTA->OUT &= ~BIT(6);

void oneline_send_one_data(u8 dat) 
{
    u8 i = 0 ;
    IO1_LOW() ;/* Now pull the bus down */
    udelay(5000) ;/* Time delay 6MS ---  Here is the starting signal for initiating communication */
    CPU_SR_ALLOC();// Close the interrupt -- Chips are different , The interfaces may be different 
    OS_ENTER_CRITICAL();// Close the interrupt 
    for(i=0 ; i<8 ;i++){
        if(dat & 0x01){
            IO1_HIGH() ;
            udelay(500);/* Time delay 600us*/
            IO1_LOW();
            udelay(170) ;/* Time delay 200us*/
        }else{
            IO1_HIGH() ;
            udelay(170);/* Time delay 200us*/
            IO1_LOW();
            udelay(500) ;/* Time delay 600us*/
        }
        dat = dat >> 1 ;/* At the time of sending , Send the highest bit first , Send the next high bit , And so on */
    }
    IO1_HIGH() ;/* When you are free, just pull the foot up */
    OS_EXIT_CRITICAL();// Open the interrupt 
    /* At the same time pay attention to , When the chip is initialized , Please pull up the signal pin .*/
}

oneline_send_one_data(0x05);// Corresponding to play the 5 Segment sound  

1. 1. Communications give an example F2-- Loop Playback

void oneline_test_CMD_F2(void){

    oneline_send_one_data(0x01) ;

    udelay(20) ;/* Time delay 25ms*/

    oneline_send_one_data(0xF2) ;   

    udelay(20) ;/* Time delay 25ms*/

}      To achieve the effect of , It's the first sound , Loop Playback , Don't stop . If you need to stop , Can send FE Instructions

4.2  Communications give an example F3-- Group play

void oneline_test_CMD_F3(void){

    oneline_send_one_data(0xF3) ;

    udelay(20) ;/* Time delay 25ms*/

    oneline_send_one_data(0x01) ;   

    udelay(20) ;/* Time delay 25ms*/

    oneline_send_one_data(0x02) ;   

    udelay(20) ;/* Time delay 25ms*/

    oneline_send_one_data(0x03) ;   

    udelay(20) ;/* Time delay 25ms*/

}    Group play No 1 paragraph 、 The first 2 paragraph 、 The first 3 Segment sound , Play in sequence . If you need to stop , Can send FE Instructions

meanwhile , In the process of combined playing , New combined playback data received , Will stop the current combo playback , Go ahead and play the new command

4.3  Communications Instructions F0 describe 【 Ultra-low power consumption 】

1、 Designed for chip access to ultra low power , Because the chip after the playback , Will automatically enter standby mode , Power consumption is maintained at 25uA .

2、 If the power consumption of the chip is lower , You need to send F0 Instructions , In any state

3、 The chip receives F0 After the instruction , Will enter the shutdown state , Power consumption is maintained at 1.7uA about

4、 If the chip needs to receive instructions again , You must first dat Signal down 40ms, Let the chip wake up , Just send the data

4.4  Communications Detail Notes

1、 control MCU After power on , The first time we need to communicate IO, That is to say ONELINE Pin is set to high level output

2、 Try and KT148A Communication between chips , strand 1K The resistance of , To adapt to different levels

3、 Chip 2 foot PB9, On the air , The voltage is about 3.1V about . Once idle , this IO Will become 2.8V about

Because there is a mechanism for idle to enter low-power standby in the chip .