sample and play see http://mbed.org/users/okini3939/notebook/I2S_TLV320AIC23B/
Dependencies: I2SSlave TLV320 mbed
Fork of i2s_audio_echo by
main.cpp@1:2aeba027f61e, 2012-12-11 (annotated)
- Committer:
- okini3939
- Date:
- Tue Dec 11 02:12:14 2012 +0000
- Revision:
- 1:2aeba027f61e
- Parent:
- 0:68f7b69ecca0
sampler
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
okini3939 | 0:68f7b69ecca0 | 1 | #include "mbed.h" |
okini3939 | 0:68f7b69ecca0 | 2 | #include "TLV320.h" |
okini3939 | 1:2aeba027f61e | 3 | #include "PRAM.h" |
okini3939 | 0:68f7b69ecca0 | 4 | |
okini3939 | 1:2aeba027f61e | 5 | #define BLOCK_SIZE 64 |
okini3939 | 1:2aeba027f61e | 6 | #define BLOCK_NUM 3 |
okini3939 | 1:2aeba027f61e | 7 | |
okini3939 | 1:2aeba027f61e | 8 | #define MODE_STOP 0 |
okini3939 | 1:2aeba027f61e | 9 | #define MODE_REC 1 |
okini3939 | 1:2aeba027f61e | 10 | #define MODE_PLAY 2 |
okini3939 | 0:68f7b69ecca0 | 11 | |
okini3939 | 0:68f7b69ecca0 | 12 | Serial pc(USBTX, USBRX); |
okini3939 | 1:2aeba027f61e | 13 | |
okini3939 | 1:2aeba027f61e | 14 | SPI _spi(p11, p12, p13); |
okini3939 | 1:2aeba027f61e | 15 | PRAM memory(_spi, p14); // SPI PRAM |
okini3939 | 1:2aeba027f61e | 16 | |
okini3939 | 0:68f7b69ecca0 | 17 | TLV320 audio(p9, p10, 0x34, p5, p6, p7, p8, p16); // I2S Codec |
okini3939 | 1:2aeba027f61e | 18 | |
okini3939 | 1:2aeba027f61e | 19 | DigitalOut led1(LED1), led2(LED2), led3(LED3), led4(LED4); |
okini3939 | 1:2aeba027f61e | 20 | DigitalIn play(p28), rec(p29), stop(p30); |
okini3939 | 0:68f7b69ecca0 | 21 | |
okini3939 | 1:2aeba027f61e | 22 | volatile int mode = MODE_STOP; |
okini3939 | 1:2aeba027f61e | 23 | volatile int addr_r, num_r; |
okini3939 | 1:2aeba027f61e | 24 | volatile int addr_w, num_w; |
okini3939 | 1:2aeba027f61e | 25 | int buf_r[BLOCK_NUM][BLOCK_SIZE / 4]; |
okini3939 | 1:2aeba027f61e | 26 | int buf_w[BLOCK_NUM][BLOCK_SIZE / 4]; |
okini3939 | 1:2aeba027f61e | 27 | |
okini3939 | 1:2aeba027f61e | 28 | volatile int mem_r, mem_w; |
okini3939 | 1:2aeba027f61e | 29 | volatile int flg_r = -1, flg_w = -1; |
okini3939 | 1:2aeba027f61e | 30 | |
okini3939 | 1:2aeba027f61e | 31 | extern "C" void HardFault_Handler() { |
okini3939 | 1:2aeba027f61e | 32 | register unsigned int _msp __asm("msp"); |
okini3939 | 1:2aeba027f61e | 33 | printf("Hard Fault! address: %08x\r\n", *((unsigned int *)(_msp + 24))); |
okini3939 | 1:2aeba027f61e | 34 | printf("buf: %d %d %d\r\n", num_w, addr_w, mem_w); |
okini3939 | 1:2aeba027f61e | 35 | exit(-1); |
okini3939 | 1:2aeba027f61e | 36 | } |
okini3939 | 0:68f7b69ecca0 | 37 | |
okini3939 | 0:68f7b69ecca0 | 38 | // interrupt TLV320 send/recv |
okini3939 | 0:68f7b69ecca0 | 39 | void isr_audio () { |
okini3939 | 1:2aeba027f61e | 40 | int i; |
okini3939 | 0:68f7b69ecca0 | 41 | int buf[4]; |
okini3939 | 0:68f7b69ecca0 | 42 | |
okini3939 | 0:68f7b69ecca0 | 43 | // I2S input |
okini3939 | 0:68f7b69ecca0 | 44 | audio.read(); |
okini3939 | 1:2aeba027f61e | 45 | |
okini3939 | 1:2aeba027f61e | 46 | switch (mode) { |
okini3939 | 1:2aeba027f61e | 47 | case MODE_STOP: |
okini3939 | 1:2aeba027f61e | 48 | for (i = 0; i < 4; i ++) { |
okini3939 | 1:2aeba027f61e | 49 | buf[i] = audio.rxBuffer[i]; |
okini3939 | 1:2aeba027f61e | 50 | } |
okini3939 | 1:2aeba027f61e | 51 | audio.write(buf, 0, 4); |
okini3939 | 1:2aeba027f61e | 52 | break; |
okini3939 | 1:2aeba027f61e | 53 | |
okini3939 | 1:2aeba027f61e | 54 | case MODE_REC: |
okini3939 | 1:2aeba027f61e | 55 | for (i = 0; i < 4; i ++) { |
okini3939 | 1:2aeba027f61e | 56 | buf[i] = audio.rxBuffer[i]; |
okini3939 | 1:2aeba027f61e | 57 | buf_w[num_w][addr_w] = buf[i]; |
okini3939 | 1:2aeba027f61e | 58 | addr_w ++; |
okini3939 | 1:2aeba027f61e | 59 | } |
okini3939 | 1:2aeba027f61e | 60 | if (addr_w >= BLOCK_SIZE / 4) { |
okini3939 | 1:2aeba027f61e | 61 | addr_w = 0; |
okini3939 | 1:2aeba027f61e | 62 | flg_w = num_w; |
okini3939 | 1:2aeba027f61e | 63 | num_w ++; |
okini3939 | 1:2aeba027f61e | 64 | if (num_w >= BLOCK_NUM) { |
okini3939 | 1:2aeba027f61e | 65 | num_w = 0; |
okini3939 | 1:2aeba027f61e | 66 | } |
okini3939 | 1:2aeba027f61e | 67 | led3 = 1; |
okini3939 | 1:2aeba027f61e | 68 | } |
okini3939 | 1:2aeba027f61e | 69 | audio.write(buf, 0, 4); |
okini3939 | 1:2aeba027f61e | 70 | break; |
okini3939 | 1:2aeba027f61e | 71 | |
okini3939 | 1:2aeba027f61e | 72 | case MODE_PLAY: |
okini3939 | 1:2aeba027f61e | 73 | for (i = 0; i < 4; i ++) { |
okini3939 | 1:2aeba027f61e | 74 | buf[i] = buf_r[num_r][addr_r]; |
okini3939 | 1:2aeba027f61e | 75 | addr_r ++; |
okini3939 | 1:2aeba027f61e | 76 | } |
okini3939 | 1:2aeba027f61e | 77 | if (addr_r >= BLOCK_SIZE / 4) { |
okini3939 | 1:2aeba027f61e | 78 | addr_r = 0; |
okini3939 | 1:2aeba027f61e | 79 | num_r ++; |
okini3939 | 1:2aeba027f61e | 80 | if (num_r >= BLOCK_NUM) { |
okini3939 | 1:2aeba027f61e | 81 | num_r = 0; |
okini3939 | 1:2aeba027f61e | 82 | } |
okini3939 | 1:2aeba027f61e | 83 | flg_r = num_r + 1 < BLOCK_NUM ? num_r + 1 : 0; |
okini3939 | 1:2aeba027f61e | 84 | led4 = 1; |
okini3939 | 1:2aeba027f61e | 85 | } |
okini3939 | 1:2aeba027f61e | 86 | audio.write(buf, 0, 4); |
okini3939 | 1:2aeba027f61e | 87 | break; |
okini3939 | 0:68f7b69ecca0 | 88 | } |
okini3939 | 0:68f7b69ecca0 | 89 | |
okini3939 | 0:68f7b69ecca0 | 90 | } |
okini3939 | 0:68f7b69ecca0 | 91 | |
okini3939 | 0:68f7b69ecca0 | 92 | int main() { |
okini3939 | 0:68f7b69ecca0 | 93 | |
okini3939 | 1:2aeba027f61e | 94 | pc.baud(115200 * 8); |
okini3939 | 1:2aeba027f61e | 95 | rec.mode(PullUp); |
okini3939 | 1:2aeba027f61e | 96 | play.mode(PullUp); |
okini3939 | 1:2aeba027f61e | 97 | stop.mode(PullUp); |
okini3939 | 0:68f7b69ecca0 | 98 | |
okini3939 | 0:68f7b69ecca0 | 99 | audio.power(0x02); // mic off |
okini3939 | 0:68f7b69ecca0 | 100 | audio.outputVolume(1, 1); // headphone off |
okini3939 | 1:2aeba027f61e | 101 | audio.inputVolume(0.7, 0.7); |
okini3939 | 0:68f7b69ecca0 | 102 | audio.frequency(44100); |
okini3939 | 0:68f7b69ecca0 | 103 | audio.attach(&isr_audio); |
okini3939 | 0:68f7b69ecca0 | 104 | audio.start(RECEIVE); |
okini3939 | 0:68f7b69ecca0 | 105 | printf("Audio ready\r\n"); |
okini3939 | 1:2aeba027f61e | 106 | led1 = 1; |
okini3939 | 0:68f7b69ecca0 | 107 | |
okini3939 | 1:2aeba027f61e | 108 | for (;;) { |
okini3939 | 1:2aeba027f61e | 109 | if (rec == 0 && mode == MODE_STOP) { |
okini3939 | 1:2aeba027f61e | 110 | printf("rec\r\n"); |
okini3939 | 1:2aeba027f61e | 111 | addr_w = 0; num_w = 0; |
okini3939 | 1:2aeba027f61e | 112 | mem_w = 0; |
okini3939 | 1:2aeba027f61e | 113 | flg_w = -1; |
okini3939 | 1:2aeba027f61e | 114 | led2 = 1; |
okini3939 | 1:2aeba027f61e | 115 | mode = MODE_REC; |
okini3939 | 1:2aeba027f61e | 116 | } |
okini3939 | 1:2aeba027f61e | 117 | if (play == 0 && mode == MODE_STOP) { |
okini3939 | 1:2aeba027f61e | 118 | printf("play\r\n"); |
okini3939 | 1:2aeba027f61e | 119 | addr_r = 0; num_r = 0; |
okini3939 | 1:2aeba027f61e | 120 | mem_r = 0; |
okini3939 | 1:2aeba027f61e | 121 | flg_r = 0; |
okini3939 | 1:2aeba027f61e | 122 | led2 = 1; |
okini3939 | 1:2aeba027f61e | 123 | mode = MODE_PLAY; |
okini3939 | 1:2aeba027f61e | 124 | } |
okini3939 | 1:2aeba027f61e | 125 | if (stop == 0 && mode != MODE_STOP) { |
okini3939 | 1:2aeba027f61e | 126 | printf("stop\r\n"); |
okini3939 | 1:2aeba027f61e | 127 | led2 = 0; |
okini3939 | 1:2aeba027f61e | 128 | mode = MODE_STOP; |
okini3939 | 1:2aeba027f61e | 129 | } |
okini3939 | 0:68f7b69ecca0 | 130 | |
okini3939 | 1:2aeba027f61e | 131 | if (mode == MODE_PLAY) { |
okini3939 | 1:2aeba027f61e | 132 | if (mem_r >= mem_w) { |
okini3939 | 1:2aeba027f61e | 133 | printf("end\r\n"); |
okini3939 | 1:2aeba027f61e | 134 | led2 = 0; |
okini3939 | 1:2aeba027f61e | 135 | mode = MODE_STOP; |
okini3939 | 1:2aeba027f61e | 136 | } |
okini3939 | 1:2aeba027f61e | 137 | } |
okini3939 | 1:2aeba027f61e | 138 | |
okini3939 | 1:2aeba027f61e | 139 | if (flg_w >= 0) { |
okini3939 | 1:2aeba027f61e | 140 | // printf("W %d %d\r\n", flg_w, mem_w); |
okini3939 | 1:2aeba027f61e | 141 | memory.write(BLOCK_SIZE * mem_w, (char *)buf_w[flg_w], BLOCK_SIZE); |
okini3939 | 1:2aeba027f61e | 142 | mem_w ++; |
okini3939 | 1:2aeba027f61e | 143 | flg_w = -1; |
okini3939 | 1:2aeba027f61e | 144 | led3 = 0; |
okini3939 | 1:2aeba027f61e | 145 | } |
okini3939 | 1:2aeba027f61e | 146 | if (flg_r >= 0) { |
okini3939 | 1:2aeba027f61e | 147 | // printf("R %d %d\r\n", flg_r, mem_r); |
okini3939 | 1:2aeba027f61e | 148 | memory.read(BLOCK_SIZE * mem_r, (char *)buf_r[flg_r], BLOCK_SIZE); |
okini3939 | 1:2aeba027f61e | 149 | mem_r ++; |
okini3939 | 1:2aeba027f61e | 150 | flg_r = -1; |
okini3939 | 1:2aeba027f61e | 151 | led4 = 0; |
okini3939 | 1:2aeba027f61e | 152 | } |
okini3939 | 0:68f7b69ecca0 | 153 | } |
okini3939 | 0:68f7b69ecca0 | 154 | |
okini3939 | 0:68f7b69ecca0 | 155 | audio.stop(); |
okini3939 | 0:68f7b69ecca0 | 156 | printf("exit\r\n"); |
okini3939 | 0:68f7b69ecca0 | 157 | } |