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=0x0b
  16
  17 /* defines */
  18 #define PWM_SINGLE_EDGE         0x00
  19 #define PWM_DOUBLE_EDGE         0x01
  20
  21 #define PWM_MATCH_INTERRUPT     0x01
  22 #define PWM_MATCH_RESET         0x02
  23 #define PWM_MATCH_STOP          0x04
  24
  25 #define PWM_SET                 0x00
  26 #define PWM_INVALID_CHAN        0x01
  27 #define PWM_STUPID              0x02
  28
  29 #define PWM_CHAN0               0
  30 #define PWM_CHAN1               1
  31 #define PWM_CHAN2               2
  32 #define PWM_CHAN3               3
  33 #define PWM_CHAN4               4
  34 #define PWM_CHAN5               5
  35 #define PWM_CHAN6               6
  36
  37 /* function prototypes */
  38
  39 void pwm_set_rate_and_prescaler(u32 rate,u32 prescaler);
  40 int pwm_config(u8 pwmchan,u8 mode,u32 val1,u32 val2);
  41 int pwm_update_match(u8 pwmchan,u8 mode,u32 val1,u32 val2);
  42 void pwm_match_ctrl_config(u8 matchreg,u8 ctrl);
  43
  44 #endif