include/bsp/pwmout-defs.h

0001 /**
0002  * @file
0003  *
0004  * @ingroup RTEMSBSPsARMLPC176X
0005  *
0006  * @brief PWM-Out controller for the mbed lpc1768 board.
0007  */
0008
0009 /*
0010  * Copyright (c) 2014 Taller Technologies.
0011  *
0012  * @author  Diaz Marcos (marcos.diaz@tallertechnologies.com)
0013  *
0014  * The license and distribution terms for this file may be
0015  * found in the file LICENSE in this distribution or at
0016  * http://www.rtems.org/license/LICENSE.
0017  */
0018
0019 #ifndef LPC176X_PWMOUT_DEFS_H
0020 #define LPC176X_PWMOUT_DEFS_H
0021
0022 #include <bsp/lpc176x.h>
0023 #include <bsp/pwmout.h>
0024
0025 #ifdef __cplusplus
0026 extern "C" {
0027 #endif /* __cplusplus */
0028
0029 #define PWM_DEFAULT_PERIOD 20000u
0030 #define PWM_DEFAULT_PULSEWIDTH 0u
0031
0032 #define PWM_PRESCALER_USECOND ( LPC176X_CCLK / 1000000 )
0033 #define PWM_MCR_RESET_ON_MATCH0 ( 1 << 1 )
0034 #define PWM_PCR_ENABLE_PWM( pwmout ) ( 1 << ( 9 + pwmout ) )
0035 #define PWM_TCR_RESET ( 1 << 1 )
0036 #define PWM_TCR_ENABLE ( 1u )
0037 #define PWM_TCR_PWM ( 1 << 3 )
0038 #define PWM_LER_LATCH_MATCH_0 1u
0039 #define PWM_LER_LATCH( match ) ( 1 << ( ( match ) + 1 ) )
0040
0041 /**
0042  * @brief The low-level PWM output device.
0043  */
0044 typedef struct {
0045   volatile uint32_t IR;
0046   volatile uint32_t TCR;
0047   volatile uint32_t TC;
0048   volatile uint32_t PR;
0049   volatile uint32_t PC;
0050   volatile uint32_t MCR;
0051   volatile uint32_t MR0;
0052   volatile uint32_t MR1;
0053   volatile uint32_t MR2;
0054   volatile uint32_t MR3;
0055   volatile uint32_t CCR;
0056   volatile uint32_t CR0;
0057   volatile uint32_t CR1;
0058   volatile uint32_t CR2;
0059   volatile uint32_t CR3;
0060   volatile uint32_t RESERVED0;
0061   volatile uint32_t MR4;
0062   volatile uint32_t MR5;
0063   volatile uint32_t MR6;
0064   volatile uint32_t PCR;
0065   volatile uint32_t LER;
0066   volatile uint32_t RESERVED1[ 7 ];
0067   volatile uint32_t CTCR;
0068 } lpc176x_pwm_device;
0069
0070 /**
0071  * @brief Represents one pin and the respective function to be set
0072  *  for each PWM output.
0073  */
0074 typedef struct {
0075   uint32_t pin_number;
0076   lpc176x_pin_function pin_function;
0077 } lpc176x_pwm_pin;
0078
0079 /**
0080  * @brief The PWM outputs of the board.
0081  */
0082 typedef enum {
0083   PWMO_1,
0084   PWMO_2,
0085   PWMO_3,
0086   PWMO_4,
0087   PWMO_5,
0088   PWMO_6,
0089   PWM_OUTPUT_NUMBER
0090 } lpc176x_pwm_number;
0091
0092 /**
0093  * @brief A pin for each PWM output.
0094  */
0095 typedef enum {
0096   PWM_FIRST_PIN,
0097   PWM_SECOND_PIN,
0098   PWM_NUMBER_OF_PINS
0099 } lpc176x_pwm_pin_number;
0100
0101 #ifdef __cplusplus
0102 }
0103 #endif /* __cplusplus */
0104
0105 #endif