S3C2440-IIS录音
程序仍在调试中#include "2440addr.h"#include "music.h"#define L3MODE 1<<2 #define L3DATA 1<<3 #define L3CLOCK 1<<4#define U32 unsigned int#define U8 unsigned char int cmd,command, stop , temp;U8 iis_buffer;void __irq UART0_ISR(void){ char ch; rSRCPND |= (0x1<<28); rINTPND |= (0x1<<28); rSUBSRCPND |= 0x1<<0; if(rUTRSTAT0 & 0x1){ ch = rURXH0; while(!(rUTRSTAT0&0x4)); rUTXH0 = ch; command = ch; switch(command){ case 0xaa: cmd = 0x01; break; case 0xbb: stop = 1; break; case 0xcc: cmd = 0x02; break; } }} void WriteL3(U8 data, U32 mode){ //mode = 0,地址模式;mode = 1,数据传输模式 int i, k; if(mode == 0){ rGPBDAT = rGPBDAT & ~(L3MODE|L3DATA|L3CLOCK )|L3CLOCK; } else{ rGPBDAT = rGPBDAT & ~(L3MODE|L3DATA|L3CLOCK)|(L3CLOCK|L3MODE); } for(k = 0; k < 5; k++) ; for(i = 0; i < 8; i++){ if(data & 0x1){ rGPBDAT &= ~L3CLOCK; rGPBDAT |= L3DATA; for(k = 0; k < 5; k++) ; rGPBDAT |= L3CLOCK; rGPBDAT |= L3DATA; for(k = 0; k < 5; k++) ; } else{ rGPBDAT &= ~L3CLOCK; rGPBDAT &= ~L3DATA; for(k = 0; k < 5; k++) ; rGPBDAT |= L3CLOCK; rGPBDAT &= ~L3DATA; for(k = 0; k < 5; k++) ; } data >>= 1; } rGPBDAT = rGPBDAT & ~(L3MODE|L3DATA|L3CLOCK)|(L3CLOCK|L3MODE); }void play(U8 buffer[], U32 length){ int i, fifo; //UDA1341 //STATUS模式 rGPBDAT = rGPBDAT & ~(L3MODE|L3DATA|L3CLOCK)|(L3CLOCK|L3MODE); WriteL3(0x14+2,0); //复位 WriteL3(0x60,1); WriteL3(0x14+2,0); //00010000 系统时钟频率384fs WriteL3(0x10,1); WriteL3(0x14+2,0); //11000001 输出增益，ADC关，DAC开 WriteL3(0xc1,1); //IIS //DMA禁止,在接受空闲状态，不产生IISLRCK信号，IIS预分频使能 rIISCON = (0<<5)|(0<<4)|(0<<3)|(1<<2)|(1<<1); //主设备时钟PCLK，主设备模式，发送模式，串行数据16位，主时钟是384fs，串行位时钟32fs rIISMOD = (0<<9)|(0<<8)|(2<<6)|(0<<5)|(0<<4)|(1<<3)|(1<<2)|(1<<0); //预分频都是N=3 rIISPSR = (3<<5)|3; //发送FIFO正常，发送FIFO使能 rIISFCON = (0<<15)|(1<<13); //IIS start rIISCON |= 0x1; for(fifo = 0; fifo <= length; fifo += 64){ while(rIISCON &(1<<7)); for(i = 0; i < 32; i++) rIISFIFO = (iis_buffer) + (iis_buffer<<8); } //IIS close rIISCON = 0x0; }void record(){int i, fifo; rGPBDAT = rGPBDAT & ~(L3MODE|L3DATA|L3CLOCK)|(L3CLOCK|L3MODE); WriteL3(0x14+2,0); //复位 WriteL3(0x60,1); WriteL3(0x14+2,0); //00010000 系统时钟频率384fs WriteL3(0x10,1); WriteL3(0x14+2,0); //10100010 输入增益，ADC开，DAC关 WriteL3(0xa2,1); WriteL3(0x14+0,0); WriteL3(0x7b,1); //01,1110,11 BB 18dB~24dB Treble 6dB WriteL3(0xc0,1); WriteL3(0xe0,1); //000,00000 MA 0dB WriteL3(0xc1,1); WriteL3(0xe0,1); //001,00000 MB 0dB WriteL3(0xc4,1); WriteL3(0xf0,1); //100,1,00,00 AGC使能 WriteL3(0xc2,1); WriteL3(0xf9,1); //010,110,11 MIC 26dB input 1 * MA + input 2 * MB //IIS //DMA禁止,在接受空闲状态，不产生IISLRCK信号，IIS预分频使能 rIISCON = (0<<5)|(0<<4)|(1<<3)|(0<<2)|(1<<1); //主设备时钟PCLK，主设备模式，接收模式，串行数据16位，主时钟是384fs，串行位时钟32fs rIISMOD = (0<<9)|(0<<8)|(1<<6)|(0<<5)|(0<<4)|(1<<3)|(1<<2)|(1<<0); //预分频都是N=3 rIISPSR = (3<<5)|3; //发送FIFO正常，发送FIFO使能 rIISFCON = (0<<14)|(1<<12); //IIS start rIISCON |= 0x1; for(fifo = 0; stop == 0; fifo += 64){ while(!(rIISCON &(1<<6))); for(i = 0; i < 32; i++){ temp = rIISFIFO; iis_buffer = temp & 0xff; iis_buffer = temp & 0xff00; } } //IIS close rIISCON = 0x0; }int Main(){ cmd = 0; stop = 0; rULCON0 = 0x3; rUCON0 = (1<<11)|(1<<2)|(1<<0); rUBRDIV0 = 36; rSRCPND = 0x1<<28; rINTPND = 0x1<<28; rSUBSRCPND = 0x1<<0; rINTMSK &= ~(0x1<<28); rINTSUBMSK &= ~(0x1<<0); pISR_UART0 = (U32)UART0_ISR; rGPBUP= rGPBUP& ~(0x7<<2) | (0x7<<2); //The pull up function is disabled GPB 1 1100 rGPBCON = rGPBCON & ~(0x3f<<4) | (0x15<<4); //GPB=Output(L3CLOCK):Output(L3DATA):Output(L3MODE) rGPBDAT = 0x1ec; rGPEUP= rGPEUP& ~(0x1f) | 0x1f; //The pull up function is disabled GPE 1 1111 rGPECON = rGPECON & ~(0x3ff) | 0x2aa; //GPE=I2SSDO:I2SSDI:CDCLK:I2SSCLK:I2SLRCK rMPLLCON = (150<<12)|(5<<4)|(0<<0); while(1){ while(!cmd); switch(cmd){ case 0x01: record(); break; case 0x02: play(iis_buffer,sizeof(iis_buffer)); break; } cmd = 0; stop = 0; } return 0;}
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