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i2s_dma update #248

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i2s_dma update #248

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18 changes: 12 additions & 6 deletions libraries/CurieI2S/examples/I2SDMA_RXCallBack/I2SDMA_RXCallBack.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -20,12 +20,17 @@

#define BUFF_SIZE 128
#define OFFSET 2
uint32_t dataBuff[BUFF_SIZE+OFFSET]; // extra 2 buffer is for the padding zero
uint32_t dataBuff[BUFF_SIZE+OFFSET]; // extra 2 buffers are for the padding zero

/**
* the received data: the higher 16 bits should be equal to loop_count and the lower 16 bits should be (0x01~0x80)
* loop_count should increase by 1 in evry loop()
* for example: if first time the received data is 0x00010001~0x00010080, then next time the data should be 0x00020001~0x00020080
**/
uint8_t start_flag = 0;
uint8_t done_flag = 0;
uint32_t loop_count = 0;
uint32_t shift_count = 0;
uint8_t done_flag = 0; // when done_flag is 1, the received data are correct
uint32_t loop_count = 0; // record the higher 16 bits of received data
uint32_t shift_count = 0; // the position of first non-zero
void setup()
{
Serial.begin(115200);
Expand Down Expand Up @@ -61,7 +66,8 @@ void loop()
}
if(shift_count > OFFSET)
return;


// record the higher 16 bits of received data
if(start_flag)
{
if((dataBuff[shift_count]>>16) != loop_count+1)
Expand All @@ -73,7 +79,7 @@ void loop()
}
loop_count = (dataBuff[shift_count] >> 16);

// check data
// check data serial: the higher 16 bits should be equal to loop_count and the lower 16 bits should be (0x01~0x80)
done_flag = 1;
for(uint32_t i = 0 ;i < BUFF_SIZE;++i)
{
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4 changes: 2 additions & 2 deletions libraries/CurieI2S/src/CurieI2SDMA.h
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,8 @@

//CurieI2SDMA.h

#ifndef _CURI2SDMA_H_
#define _CURI2SDMA_H_
#ifndef _CURIEI2SDMA_H_
#define _CURIEI2SDMA_H_

#include <Arduino.h>

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