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i2c
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algos
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i2c-algo-pcf.h

i2c-algo-pcf.h 2.6 KB
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  1. /* -------------------------------------------------------------------- */
    2. 

  2. /* i2c-pcf8584.h: PCF 8584 global defines				*/
    3. 

  3. /* -------------------------------------------------------------------- */
    4. 

  4. /*   Copyright (C) 1996 Simon G. Vogl
    5. 

  5.                    1999 Hans Berglund
    6. 

  6. 

  7.     This program is free software; you can redistribute it and/or modify
    8. 

  8.     it under the terms of the GNU General Public License as published by
    9. 

  9.     the Free Software Foundation; either version 2 of the License, or
    10. 

  10.     (at your option) any later version.
    11. 

  11. 

  12.     This program is distributed in the hope that it will be useful,
    13. 

  13.     but WITHOUT ANY WARRANTY; without even the implied warranty of
    14. 

  14.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    15. 

  15.     GNU General Public License for more details.			*/
    16. 

  16. /* --------------------------------------------------------------------	*/
    17. 

  17. 

  18. /* With some changes from Frodo Looijaard <frodol@dds.nl> */
    19. 

  19. 

  20. #ifndef I2C_PCF8584_H
    21. 

  21. #define I2C_PCF8584_H 1
    22. 

  22. 

  23. /* ----- Control register bits ----------------------------------------	*/
    24. 

  24. #define I2C_PCF_PIN	0x80
    25. 

  25. #define I2C_PCF_ESO	0x40
    26. 

  26. #define I2C_PCF_ES1	0x20
    27. 

  27. #define I2C_PCF_ES2	0x10
    28. 

  28. #define I2C_PCF_ENI	0x08
    29. 

  29. #define I2C_PCF_STA	0x04
    30. 

  30. #define I2C_PCF_STO	0x02
    31. 

  31. #define I2C_PCF_ACK	0x01
    32. 

  32. 

  33. #define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
    34. 

  34. #define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
    35. 

  35. #define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
    36. 

  36. #define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
    37. 

  37. 

  38. /* ----- Status register bits -----------------------------------------	*/
    39. 

  39. /*#define I2C_PCF_PIN  0x80    as above*/
    40. 

  40. 

  41. #define I2C_PCF_INI 0x40   /* 1 if not initialized */
    42. 

  42. #define I2C_PCF_STS 0x20
    43. 

  43. #define I2C_PCF_BER 0x10
    44. 

  44. #define I2C_PCF_AD0 0x08
    45. 

  45. #define I2C_PCF_LRB 0x08
    46. 

  46. #define I2C_PCF_AAS 0x04
    47. 

  47. #define I2C_PCF_LAB 0x02
    48. 

  48. #define I2C_PCF_BB  0x01
    49. 

  49. 

  50. /* ----- Chip clock frequencies ---------------------------------------	*/
    51. 

  51. #define I2C_PCF_CLK3	0x00
    52. 

  52. #define I2C_PCF_CLK443	0x10
    53. 

  53. #define I2C_PCF_CLK6	0x14
    54. 

  54. #define I2C_PCF_CLK	0x18
    55. 

  55. #define I2C_PCF_CLK12	0x1c
    56. 

  56. 

  57. /* ----- transmission frequencies -------------------------------------	*/
    58. 

  58. #define I2C_PCF_TRNS90 0x00	/*  90 kHz */
    59. 

  59. #define I2C_PCF_TRNS45 0x01	/*  45 kHz */
    60. 

  60. #define I2C_PCF_TRNS11 0x02	/*  11 kHz */
    61. 

  61. #define I2C_PCF_TRNS15 0x03	/* 1.5 kHz */
    62. 

  62. 

  63. 

  64. /* ----- Access to internal registers according to ES1,ES2 ------------	*/
    65. 

  65. /* they are mapped to the data port ( a0 = 0 ) 				*/
    66. 

  66. /* available when ESO == 0 :						*/
    67. 

  67. 

  68. #define I2C_PCF_OWNADR	0
    69. 

  69. #define I2C_PCF_INTREG	I2C_PCF_ES2
    70. 

  70. #define I2C_PCF_CLKREG	I2C_PCF_ES1
    71. 

  71. 

  72. #endif /* I2C_PCF8584_H */
    73. 

  73.