aci.h
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:2k
- #ifndef _ACI_H_
- #define _ACI_H_
- extern int aci_port;
- extern int aci_idcode[2]; /* manufacturer and product ID */
- extern int aci_version; /* ACI firmware version */
- extern int aci_rw_cmd(int write1, int write2, int write3);
- #define aci_indexed_cmd(a, b) aci_rw_cmd(a, b, -1)
- #define aci_write_cmd(a, b) aci_rw_cmd(a, b, -1)
- #define aci_read_cmd(a) aci_rw_cmd(a,-1, -1)
- #define COMMAND_REGISTER (aci_port) /* write register */
- #define STATUS_REGISTER (aci_port + 1) /* read register */
- #define BUSY_REGISTER (aci_port + 2) /* also used for rds */
- #define RDS_REGISTER BUSY_REGISTER
- #define ACI_SET_MUTE 0x0d
- #define ACI_SET_POWERAMP 0x0f
- #define ACI_SET_TUNERMUTE 0xa3
- #define ACI_SET_TUNERMONO 0xa4
- #define ACI_SET_IDE 0xd0
- #define ACI_SET_WSS 0xd1
- #define ACI_SET_SOLOMODE 0xd2
- #define ACI_WRITE_IGAIN 0x03
- #define ACI_WRITE_TUNE 0xa7
- #define ACI_READ_TUNERSTEREO 0xa8
- #define ACI_READ_TUNERSTATION 0xa9
- #define ACI_READ_VERSION 0xf1
- #define ACI_READ_IDCODE 0xf2
- #define ACI_INIT 0xff
- #define ACI_STATUS 0xf0
- #define ACI_S_GENERAL 0x00
- #define ACI_S_READ_IGAIN 0x21
- #define ACI_ERROR_OP 0xdf
- /*
- * The following macro SCALE can be used to scale one integer volume
- * value into another one using only integer arithmetic. If the input
- * value x is in the range 0 <= x <= xmax, then the result will be in
- * the range 0 <= SCALE(xmax,ymax,x) <= ymax.
- *
- * This macro has for all xmax, ymax > 0 and all 0 <= x <= xmax the
- * following nice properties:
- *
- * - SCALE(xmax,ymax,xmax) = ymax
- * - SCALE(xmax,ymax,0) = 0
- * - SCALE(xmax,ymax,SCALE(ymax,xmax,SCALE(xmax,ymax,x))) = SCALE(xmax,ymax,x)
- *
- * In addition, the rounding error is minimal and nicely distributed.
- * The proofs are left as an exercise to the reader.
- */
- #define SCALE(xmax,ymax,x) (((x)*(ymax)+(xmax)/2)/(xmax))
- #endif /* _ACI_H_ */