?? dac.cpp
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#include "dac.h"#if 0#include <stdio.h>static void debug_break (void){}#define ASSERT(exp) ((void)((exp)?1:(printf ("ASSERT failed: line %d, file %s\n", __LINE__,__FILE__), debug_break(), 0)))#define DEBUGMSG(cond,printf_exp) ((void)((cond)?(printf printf_exp),1:0))#else#define ASSERT(exp)#define DEBUGMSG(cond,printf_exp)#endif#define MAX(X,Y) (((X)>=(Y))?(X):(Y)) // to find the max between two number.#define MIN(X,Y) (((X)<=(Y))?(X):(Y)) // to find the min between two number.static int mute = 0;static int volume = 50;static int balance = 50;typedef unsigned char RMuint8;typedef unsigned long RMuint32;#define I2C_MASTER_BASE_ADDRESS (0x500800)#define I2C_MASTER_CONFIG (I2C_MASTER_BASE_ADDRESS + 0x00)#define I2C_MASTER_CLK_DIV (I2C_MASTER_BASE_ADDRESS + 0x04)#define I2C_MASTER_DEV_ADDR (I2C_MASTER_BASE_ADDRESS + 0x08)#define I2C_MASTER_ADR (I2C_MASTER_BASE_ADDRESS + 0x0c)#define I2C_MASTER_DATAOUT (I2C_MASTER_BASE_ADDRESS + 0x10)#define I2C_MASTER_DATAIN (I2C_MASTER_BASE_ADDRESS + 0x14)#define I2C_MASTER_STATUS (I2C_MASTER_BASE_ADDRESS + 0x18)#define I2C_MASTER_STARTXFER (I2C_MASTER_BASE_ADDRESS + 0x1c)#define I2C_MASTER_BYTE_CNT (I2C_MASTER_BASE_ADDRESS + 0x20)#define I2C_MASTER_INTEN (I2C_MASTER_BASE_ADDRESS + 0x24)#define I2C_MASTER_INT (I2C_MASTER_BASE_ADDRESS + 0x28)#define ADRR_DEVICE 0x34 //adresse of the device (0x36)#define ADRR_REG_VOL_LEFT 4 //adresse of the register for the volume headphone left#define ADRR_REG_VOL_RIGHT 6 //adresse of the register for the volume headphone right#define ADRR_REG_RESET 0x1e //0 //adresse of the register for the reset of board#define ADRR_REG_ACTIVATION 18 //adresse of the register for the actvation of sound#define ADRR_REG_DAC_SELECTED 8 //adresse of the register for the selected dac#define ADRR_REG_MUTE 10 //adresse of the register for manage mute#define ADRR_REG_POWER 12 //adresse of the register for manage power#define DAC_SELECTED_ENABLE 0x10 //to selected the dac#define RESET_SOUND 0x00 //to reset all function of sound#define ACTIVATION_ENABLE 0x01 //to activate the sound#define MUTE_DISABLE 0x00 //to disable the function mute#define MUTE_ENABLE 0x08 //to enable the function mute#define ENABLE_POWER 0x66 //to manage the function power down (DAC and LINEOUT power on) [01100110]static void EM85xx_WriteReg (RMuint32 Reg, RMuint32 Data){ *((volatile RMuint32 *)Reg) = Data;}static RMuint32 EM85xx_ReadReg (RMuint32 Reg){ return *((volatile RMuint32 *)(Reg));}static int EM85xxI2C__Write (RMuint8 devaddr, RMuint8 adr, RMuint8* pData, int n){ int i; EM85xx_WriteReg (I2C_MASTER_CONFIG, 0xf8); EM85xx_WriteReg (I2C_MASTER_CLK_DIV, 375); // assume 150mhz clock (375=750/2) EM85xx_WriteReg (I2C_MASTER_DEV_ADDR, devaddr >> 1); // ready for a command // XXX bug: we really should have a timeout here while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 1) == 0); // write for (i=0; i<n; i++) { EM85xx_WriteReg (I2C_MASTER_ADR, adr++); EM85xx_WriteReg (I2C_MASTER_BYTE_CNT, 0); EM85xx_WriteReg (I2C_MASTER_DATAOUT, *pData++); EM85xx_WriteReg (I2C_MASTER_STARTXFER, 0); // XXX bug: we really should have a timeout here while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 2) == 0); } return 1;}static int EM85xxI2C__Read (RMuint8 devaddr, RMuint8 adr, RMuint8* pData, int n){ int i; EM85xx_WriteReg (I2C_MASTER_CLK_DIV, 375); // assume 150mhz clock (375=750/2) // ready for a command // XXX bug: we really should have a timeout here while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 1) == 0); for (i=0; i<n; i++) { EM85xx_WriteReg (I2C_MASTER_CONFIG, 0xfa); EM85xx_WriteReg (I2C_MASTER_BYTE_CNT, 0); EM85xx_WriteReg (I2C_MASTER_DEV_ADDR, devaddr >> 1); EM85xx_WriteReg (I2C_MASTER_DATAOUT, adr++); EM85xx_WriteReg (I2C_MASTER_STARTXFER, 0 | 0x4); // XXX bug: we really should have a timeout here while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 2) == 0); while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 1) == 0); EM85xx_WriteReg (I2C_MASTER_CONFIG, 0x00FA); EM85xx_WriteReg (I2C_MASTER_BYTE_CNT, 0); EM85xx_WriteReg (I2C_MASTER_DEV_ADDR, devaddr >> 1); EM85xx_WriteReg (I2C_MASTER_STARTXFER, 1); // XXX bug: we really should have a timeout here while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 4) == 0); while ((EM85xx_ReadReg (I2C_MASTER_STATUS) & 1) == 0); *pData++ = (RMuint8)EM85xx_ReadReg (I2C_MASTER_DATAIN); } return 1;}int dac_init (void){ RMuint8 data; // reset the dac data = (RMuint8)RESET_SOUND; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_RESET, &data, 1); DEBUGMSG (1, ("%02x: wrote 0x%02x to register %d\n", (RMuint8)ADRR_DEVICE, data, (RMuint8)ADRR_REG_RESET)); // activate dac data = (RMuint8)ACTIVATION_ENABLE; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_ACTIVATION, &data, 1); DEBUGMSG (1, ("%02x: wrote 0x%02x to register %d\n", (RMuint8)ADRR_DEVICE, data, (RMuint8)ADRR_REG_ACTIVATION)); // select dac data = (RMuint8)DAC_SELECTED_ENABLE; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_DAC_SELECTED, &data, 1); DEBUGMSG (1, ("%02x: wrote 0x%02x to register %d\n", (RMuint8)ADRR_DEVICE, data, (RMuint8)ADRR_REG_DAC_SELECTED)); // disable mute data = (RMuint8)MUTE_DISABLE; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_MUTE, &data, 1); DEBUGMSG (1, ("%02x: wrote 0x%02x to register %d\n", (RMuint8)ADRR_DEVICE, data, (RMuint8) ADRR_REG_MUTE)); // disable power down data = (RMuint8)ENABLE_POWER; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_POWER, &data, 1); DEBUGMSG (1, ("%02x: wrote 0x%02x to register %d\n", (RMuint8)ADRR_DEVICE, data, (RMuint8)ADRR_REG_POWER)); // put the volume at 50% int volLeft; int volRight; if (balance > 50) { volLeft = (balance*volume) / 100; volRight = volume; } else if (balance < 50) { volLeft = volume; volRight = ((100-balance)*volume)/100; } else if (balance == 50) { volLeft = volume; volRight = volume; } DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100) + 48; volRight = (volRight*79/100) + 48; DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n",balance, volume, volLeft, volRight)); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT, (RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_RIGHT, (RMuint8 *)&volRight, 1); return 0;}int dac_getvolume (void){ return volume;}int dac_getbalance (void){ return balance;}int dac_setvolume (int vol) { int volLeft; int volRight; volume = MIN (100, vol); volume = MAX (0, vol); if (balance > 50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if (balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if (balance == 50) { volLeft=volume; volRight=volume; } DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100) + 48; volRight = (volRight*79/100) + 48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT, (RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE,( RMuint8)ADRR_REG_VOL_RIGHT, (RMuint8 *)&volRight, 1); return volume;}int dac_setbalance (const int bal) { int volLeft; int volRight; balance = MIN (100, bal); balance = MAX (0, bal); if (balance > 50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if(balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if(balance == 50) { volLeft = volume; volRight = volume; } DEBUGMSG (1, ("\nbalance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100)+48; volRight = (volRight*79/100)+48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT, (RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_RIGHT, (RMuint8 *)&volRight, 1); return balance;}int dac_getmute (void){ return mute;}int dac_volumeup (void){ int volLeft; int volRight; volume = MIN (100, volume+5); if (balance > 50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if (balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if (balance == 50) { volLeft=volume; volRight=volume; } DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100) + 48; volRight = (volRight*79/100) + 48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT, (RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE,( RMuint8)ADRR_REG_VOL_RIGHT, (RMuint8 *)&volRight, 1); return volume;}int dac_volumedown (void){ int volLeft; int volRight; volume = MAX (0, volume-5); if (balance > 50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if (balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if (balance == 50) { volLeft = volume; volRight = volume; } DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100)+48; volRight = (volRight*79/100)+48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT,(RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_RIGHT,(RMuint8 *)&volRight, 1); return volume;}int dac_balanceright (void){ int volLeft; int volRight; balance = MIN (100, balance+5); if (balance > 50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if(balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if(balance == 50) { volLeft = volume; volRight = volume; } DEBUGMSG (1, ("\nbalance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100)+48; volRight = (volRight*79/100)+48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT, (RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_RIGHT, (RMuint8 *)&volRight, 1); return balance;}int dac_balanceleft (void){ int volLeft; int volRight; balance = MAX (0, balance-5); if (balance>50) { volLeft = ((100-balance)*2*volume)/100; volRight = volume; } else if (balance < 50) { volLeft = volume; volRight = (balance*2*volume)/100; } else if (balance == 50) { volLeft = volume; volRight = volume; } DEBUGMSG (1, ("balance : %d volume is :%d and [volLeft : %d volRight : %d ]\n", balance, volume, volLeft, volRight)); // to pump up the volume volLeft = (volLeft*79/100)+48; volRight = (volRight*79/100)+48; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_LEFT,(RMuint8 *)&volLeft, 1); EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_VOL_RIGHT,(RMuint8 *)&volRight, 1); return balance;}int dac_mute (int mute_enable){ int data; mute = mute_enable; if (mute) data = MUTE_ENABLE; else data = MUTE_DISABLE; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)ADRR_REG_MUTE, (RMuint8 *)&data, 1); DEBUGMSG (1, ("mute= : %d \n", mute)); return mute;}int dac_write (int addr, int data){ RMuint8 b = (RMuint8)data; EM85xxI2C__Write ((RMuint8)ADRR_DEVICE, (RMuint8)addr, &b, 1); return data;}int dac_read (int addr){ RMuint8 b = 0xff; EM85xxI2C__Read ((RMuint8)ADRR_DEVICE, (RMuint8)addr, &b, 1); return b;}void dac_powerdown_input(const bool down) { const int def = ENABLE_POWER; if(down) //111 (left to right: adc, mic input + bias, line input) dac_write(ADRR_REG_POWER, def | 0x7); else dac_write(ADRR_REG_POWER, def & 0xFFF8);}void dac_powerdown_output(const bool down) { const int def = ENABLE_POWER; if(down) //11000 (left to right: dac, line output) dac_write(ADRR_REG_POWER, def | 0x18); else dac_write(ADRR_REG_POWER, def & 0xFFE7);}?? 快捷鍵說明
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