betty/pwm.h

   1 /*
   2  * pwm.h - arm pwm interface header file
   3  *
   4  * author: hackbard@hackdaworld.org
   5  *
   6  */
   7
   8 #ifndef PWM_H
   9 #define PWM_H
  10
  11 #include "lpc2xxx.h"
  12 #include "types.h"
  13
  14 /* macros */
  15 #define pwm_enable PWMTCR=0x09
  16 #define pwm_reset PWMTCR=0x03
  17 #define pwm_disable PWMTCR=0x00
  18
  19 /* defines */
  20 #define PWM_SINGLE_EDGE         0x00
  21 #define PWM_DOUBLE_EDGE         0x01
  22
  23 #define PWM_MATCH_INTERRUPT     0x01
  24 #define PWM_MATCH_RESET         0x02
  25 #define PWM_MATCH_STOP          0x04
  26
  27 #define PWM_SET                 0x00
  28 #define PWM_INVALID_CHAN        0x01
  29 #define PWM_STUPID              0x02
  30
  31 #define PWM_CHAN0               0
  32 #define PWM_CHAN1               1
  33 #define PWM_CHAN2               2
  34 #define PWM_CHAN3               3
  35 #define PWM_CHAN4               4
  36 #define PWM_CHAN5               5
  37 #define PWM_CHAN6               6
  38
  39 /* function prototypes */
  40
  41 void pwm_set_rate_and_prescaler(u32 rate,u32 prescaler);
  42 int pwm_config(u8 pwmchan,u8 mode,u32 val1,u32 val2);
  43 int pwm_update_match(u8 pwmchan,u8 mode,u32 val1,u32 val2);
  44 void pwm_match_ctrl_config(u8 matchreg,u8 ctrl);
  45
  46 #endif