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pwmcmds: Add Kconfig option to allow boards to disable hardware PWM commands

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Some boards may not support hardware based PWM.  Update the build so
that those commands do not need to be compiled if they are not
available.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-06-08 19:44:34 -04:00
parent c20f993747
commit 4fcf5a31f5
5 changed files with 85 additions and 70 deletions
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72
src/gpiocmds.c
View file

@ -4,12 +4,11 @@
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include <stddef.h> // offsetof
#include "basecmd.h" // alloc_oid
#include "board/gpio.h" // struct gpio
#include "board/gpio.h" // struct gpio_out
#include "board/irq.h" // irq_save
#include "command.h" // DECL_COMMAND
#include "sched.h" // DECL_TASK
#include "sched.h" // sched_timer
/****************************************************************
@ -86,73 +85,6 @@ command_set_digital_out(uint32_t *args)
DECL_COMMAND(command_set_digital_out, "set_digital_out pin=%u value=%c");
/****************************************************************
* Hardware PWM pins
****************************************************************/
struct pwm_out_s {
struct timer timer;
struct gpio_pwm pin;
uint32_t max_duration;
uint8_t value, default_value;
};
static uint8_t
pwm_event(struct timer *timer)
{
struct pwm_out_s *p = container_of(timer, struct pwm_out_s, timer);
gpio_pwm_write(p->pin, p->value);
if (p->value == p->default_value || !p->max_duration)
return SF_DONE;
p->timer.waketime += p->max_duration;
p->timer.func = digital_end_event;
return SF_RESCHEDULE;
}
void
command_config_pwm_out(uint32_t *args)
{
struct pwm_out_s *p = alloc_oid(args[0], command_config_pwm_out, sizeof(*p));
p->default_value = args[3];
p->pin = gpio_pwm_setup(args[1], args[2], p->default_value);
p->max_duration = args[4];
}
DECL_COMMAND(command_config_pwm_out,
"config_pwm_out oid=%c pin=%u cycle_ticks=%u default_value=%c"
" max_duration=%u");
void
command_schedule_pwm_out(uint32_t *args)
{
struct pwm_out_s *p = lookup_oid(args[0], command_config_pwm_out);
sched_del_timer(&p->timer);
p->timer.func = pwm_event;
p->timer.waketime = args[1];
p->value = args[2];
sched_timer(&p->timer);
}
DECL_COMMAND(command_schedule_pwm_out,
"schedule_pwm_out oid=%c clock=%u value=%c");
static void
pwm_shutdown(void)
{
uint8_t i;
struct pwm_out_s *p;
foreach_oid(i, p, command_config_pwm_out) {
gpio_pwm_write(p->pin, p->default_value);
}
}
DECL_SHUTDOWN(pwm_shutdown);
void
command_set_pwm_out(uint32_t *args)
{
gpio_pwm_setup(args[0], args[1], args[2]);
}
DECL_COMMAND(command_set_pwm_out, "set_pwm_out pin=%u cycle_ticks=%u value=%c");
/****************************************************************
* Soft PWM output pins
****************************************************************/