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pwm.hpp: Add C++ wrapper around Pwm

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* maa_pwm_context becomes an opaque pointer
* C++ wrapper class Pwm
* swig now uses C++ wrapper Pwm to generate API

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-05-16 11:53:19 +01:00
parent 8a03e61f43
commit f0763844fa
6 changed files with 130 additions and 106 deletions
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49
src/pwm/pwm.c
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@@ -26,8 +26,19 @@
#include "pwm.h"
/**
* A strucutre representing a PWM pin
*/
struct _pwm {
/*@{*/
int pin; /**< the pin number, as known to the os. */
int chipid; /**< the chip id, which the pwm resides */
FILE *duty_fp; /**< File pointer to duty file */
/*@}*/
};
static int
maa_pwm_setup_duty_fp(maa_pwm_context* dev)
maa_pwm_setup_duty_fp(maa_pwm_context dev)
{
char bu[64];
sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/duty_cycle", dev->chipid, dev->pin);
@@ -39,7 +50,7 @@ maa_pwm_setup_duty_fp(maa_pwm_context* dev)
}
static maa_result_t
maa_pwm_write_period(maa_pwm_context* dev, int period)
maa_pwm_write_period(maa_pwm_context dev, int period)
{
FILE *period_f;
char bu[64];
@@ -57,7 +68,7 @@ maa_pwm_write_period(maa_pwm_context* dev, int period)
}
static maa_result_t
maa_pwm_write_duty(maa_pwm_context* dev, int duty)
maa_pwm_write_duty(maa_pwm_context dev, int duty)
{
if (dev->duty_fp == NULL) {
maa_pwm_setup_duty_fp(dev);
@@ -71,7 +82,7 @@ maa_pwm_write_duty(maa_pwm_context* dev, int duty)
}
static int
maa_pwm_get_period(maa_pwm_context* dev)
maa_pwm_get_period(maa_pwm_context dev)
{
FILE *period_f;
char bu[64];
@@ -88,7 +99,7 @@ maa_pwm_get_period(maa_pwm_context* dev)
}
static int
maa_pwm_get_duty(maa_pwm_context* dev)
maa_pwm_get_duty(maa_pwm_context dev)
{
if (dev->duty_fp == NULL) {
maa_pwm_setup_duty_fp(dev);
@@ -99,7 +110,7 @@ maa_pwm_get_duty(maa_pwm_context* dev)
return atoi(output);
}
maa_pwm_context*
maa_pwm_context
maa_pwm_init(int pin) {
maa_pin_t* pinm = maa_check_pwm(pin);
if (pinm == NULL)
@@ -110,10 +121,10 @@ maa_pwm_init(int pin) {
return maa_pwm_init_raw(chip,pinn);
}
maa_pwm_context*
maa_pwm_context
maa_pwm_init_raw(int chipin, int pin)
{
maa_pwm_context* dev = (maa_pwm_context*) malloc(sizeof(maa_pwm_context));
maa_pwm_context dev = (maa_pwm_context) malloc(sizeof(struct _pwm));
if (dev == NULL)
return NULL;
@@ -137,56 +148,56 @@ maa_pwm_init_raw(int chipin, int pin)
}
maa_result_t
maa_pwm_write(maa_pwm_context* dev, float percentage)
maa_pwm_write(maa_pwm_context dev, float percentage)
{
return maa_pwm_write_duty(dev, percentage * maa_pwm_get_period(dev));
}
float
maa_pwm_read(maa_pwm_context* dev)
maa_pwm_read(maa_pwm_context dev)
{
float output = maa_pwm_get_duty(dev) / (float) maa_pwm_get_period(dev);
return output;
}
maa_result_t
maa_pwm_period(maa_pwm_context* dev, float seconds)
maa_pwm_period(maa_pwm_context dev, float seconds)
{
return maa_pwm_period_ms(dev, seconds*1000);
}
maa_result_t
maa_pwm_period_ms(maa_pwm_context* dev, int ms)
maa_pwm_period_ms(maa_pwm_context dev, int ms)
{
return maa_pwm_period_us(dev, ms*1000);
}
maa_result_t
maa_pwm_period_us(maa_pwm_context* dev, int us)
maa_pwm_period_us(maa_pwm_context dev, int us)
{
return maa_pwm_write_period(dev, us*1000);
}
maa_result_t
maa_pwm_pulsewidth(maa_pwm_context* dev, float seconds)
maa_pwm_pulsewidth(maa_pwm_context dev, float seconds)
{
return maa_pwm_pulsewidth_ms(dev, seconds*1000);
}
maa_result_t
maa_pwm_pulsewidth_ms(maa_pwm_context* dev, int ms)
maa_pwm_pulsewidth_ms(maa_pwm_context dev, int ms)
{
return maa_pwm_pulsewidth_us(dev, ms*1000);
}
maa_result_t
maa_pwm_pulsewidth_us(maa_pwm_context* dev, int us)
maa_pwm_pulsewidth_us(maa_pwm_context dev, int us)
{
return maa_pwm_write_duty(dev, us*1000);
}
maa_result_t
maa_pwm_enable(maa_pwm_context* dev, int enable)
maa_pwm_enable(maa_pwm_context dev, int enable)
{
int status;
if (enable != 0) {
@@ -210,7 +221,7 @@ maa_pwm_enable(maa_pwm_context* dev, int enable)
}
maa_result_t
maa_pwm_unexport(maa_pwm_context* dev)
maa_pwm_unexport(maa_pwm_context dev)
{
// disable pwm before unexporting
maa_pwm_enable(dev, 0);
@@ -230,7 +241,7 @@ maa_pwm_unexport(maa_pwm_context* dev)
}
maa_result_t
maa_pwm_close(maa_pwm_context* dev)
maa_pwm_close(maa_pwm_context dev)
{
maa_pwm_unexport(dev);
free(dev);