sample and play see http://mbed.org/users/okini3939/notebook/I2S_TLV320AIC23B/
Dependencies: I2SSlave TLV320 mbed
Fork of i2s_audio_echo by
main.cpp
- Committer:
- okini3939
- Date:
- 2012-12-11
- Revision:
- 1:2aeba027f61e
- Parent:
- 0:68f7b69ecca0
File content as of revision 1:2aeba027f61e:
#include "mbed.h" #include "TLV320.h" #include "PRAM.h" #define BLOCK_SIZE 64 #define BLOCK_NUM 3 #define MODE_STOP 0 #define MODE_REC 1 #define MODE_PLAY 2 Serial pc(USBTX, USBRX); SPI _spi(p11, p12, p13); PRAM memory(_spi, p14); // SPI PRAM TLV320 audio(p9, p10, 0x34, p5, p6, p7, p8, p16); // I2S Codec DigitalOut led1(LED1), led2(LED2), led3(LED3), led4(LED4); DigitalIn play(p28), rec(p29), stop(p30); volatile int mode = MODE_STOP; volatile int addr_r, num_r; volatile int addr_w, num_w; int buf_r[BLOCK_NUM][BLOCK_SIZE / 4]; int buf_w[BLOCK_NUM][BLOCK_SIZE / 4]; volatile int mem_r, mem_w; volatile int flg_r = -1, flg_w = -1; extern "C" void HardFault_Handler() { register unsigned int _msp __asm("msp"); printf("Hard Fault! address: %08x\r\n", *((unsigned int *)(_msp + 24))); printf("buf: %d %d %d\r\n", num_w, addr_w, mem_w); exit(-1); } // interrupt TLV320 send/recv void isr_audio () { int i; int buf[4]; // I2S input audio.read(); switch (mode) { case MODE_STOP: for (i = 0; i < 4; i ++) { buf[i] = audio.rxBuffer[i]; } audio.write(buf, 0, 4); break; case MODE_REC: for (i = 0; i < 4; i ++) { buf[i] = audio.rxBuffer[i]; buf_w[num_w][addr_w] = buf[i]; addr_w ++; } if (addr_w >= BLOCK_SIZE / 4) { addr_w = 0; flg_w = num_w; num_w ++; if (num_w >= BLOCK_NUM) { num_w = 0; } led3 = 1; } audio.write(buf, 0, 4); break; case MODE_PLAY: for (i = 0; i < 4; i ++) { buf[i] = buf_r[num_r][addr_r]; addr_r ++; } if (addr_r >= BLOCK_SIZE / 4) { addr_r = 0; num_r ++; if (num_r >= BLOCK_NUM) { num_r = 0; } flg_r = num_r + 1 < BLOCK_NUM ? num_r + 1 : 0; led4 = 1; } audio.write(buf, 0, 4); break; } } int main() { pc.baud(115200 * 8); rec.mode(PullUp); play.mode(PullUp); stop.mode(PullUp); audio.power(0x02); // mic off audio.outputVolume(1, 1); // headphone off audio.inputVolume(0.7, 0.7); audio.frequency(44100); audio.attach(&isr_audio); audio.start(RECEIVE); printf("Audio ready\r\n"); led1 = 1; for (;;) { if (rec == 0 && mode == MODE_STOP) { printf("rec\r\n"); addr_w = 0; num_w = 0; mem_w = 0; flg_w = -1; led2 = 1; mode = MODE_REC; } if (play == 0 && mode == MODE_STOP) { printf("play\r\n"); addr_r = 0; num_r = 0; mem_r = 0; flg_r = 0; led2 = 1; mode = MODE_PLAY; } if (stop == 0 && mode != MODE_STOP) { printf("stop\r\n"); led2 = 0; mode = MODE_STOP; } if (mode == MODE_PLAY) { if (mem_r >= mem_w) { printf("end\r\n"); led2 = 0; mode = MODE_STOP; } } if (flg_w >= 0) { // printf("W %d %d\r\n", flg_w, mem_w); memory.write(BLOCK_SIZE * mem_w, (char *)buf_w[flg_w], BLOCK_SIZE); mem_w ++; flg_w = -1; led3 = 0; } if (flg_r >= 0) { // printf("R %d %d\r\n", flg_r, mem_r); memory.read(BLOCK_SIZE * mem_r, (char *)buf_r[flg_r], BLOCK_SIZE); mem_r ++; flg_r = -1; led4 = 0; } } audio.stop(); printf("exit\r\n"); }