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samples: pwm: adapt to new api argument definition

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Change the api argument format following the API
argument definition change in the driver. Some
definitions of CONSTANTs were changed accordingly.

Correct some comment error.

Jira: ZEP-642

Change-Id: I1b34640aa70f1597076e035e2b3b576d8337129a
Signed-off-by: Baohong Liu <baohong.liu@intel.com>
This commit is contained in:
Baohong Liu 2016-08-24 10:54:39 -07:00 • committed by Anas Nashif
commit 4a8f65cccf
1 changed files with 30 additions and 11 deletions
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41
samples/drivers/pwm/src/main.c
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@ -28,7 +28,8 @@
* The sample runs like this on PWM[0] (IO3): * The sample runs like this on PWM[0] (IO3):
* 1. At first, the period for the PWM is 1 second on, 1 second off. * 1. At first, the period for the PWM is 1 second on, 1 second off.
* 2. Every 4 seconds, the period is halved. * 2. Every 4 seconds, the period is halved.
* 3. After the period is faster than 10ms, period starts to double. * 3. After the period is faster than 1 ms on and 1 ms off, period
* starts to double.
* 4. Every 4 seconds, period is doubled. * 4. Every 4 seconds, period is doubled.
* 5. When period is longer than 1 seconds, repeat from 2. * 5. When period is longer than 1 seconds, repeat from 2.
* *
@ -44,11 +45,20 @@
#include <pwm.h> #include <pwm.h>
#include <sys_clock.h> #include <sys_clock.h>
/* about 1 ms */ #define HW_CLOCK_CYCLES_PER_USEC (CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC / \
#define MIN_PERIOD 32000 USEC_PER_SEC)
/* about 1 second */ /**
#define MAX_PERIOD 32000000 * unit: micro second.
* 1 m sec for "on" or "off" time.
*/
#define MIN_PERIOD 1000
/**
* unit: micro second.
* 1 sec for "on" or "off" time
*/
#define MAX_PERIOD 1000000
#define SLEEPTICKS SECONDS(4) #define SLEEPTICKS SECONDS(4)
@ -69,25 +79,34 @@ void main(void)
printk("Cannot find PWM_0!\n"); printk("Cannot find PWM_0!\n");
} }
period = MAX_PERIOD; period = MAX_PERIOD * 2;
dir = 0; dir = 0;
while (1) { while (1) {
pwm_pin_set_values(pwm_dev, 0, period, period); if (pwm_pin_set_period(pwm_dev, 0, period)) {
printk("set period fails\n");
return;
}
if (pwm_pin_set_values(pwm_dev, 0, 0,
(period * HW_CLOCK_CYCLES_PER_USEC) / 2)) {
printk("set values fails\n");
return;
}
if (dir) { if (dir) {
period *= 2; period *= 2;
if (period > MAX_PERIOD) { if (period > (MAX_PERIOD * 2)) {
dir = 0; dir = 0;
period = MAX_PERIOD; period = MAX_PERIOD * 2;
} }
} else { } else {
period /= 2; period /= 2;
if (period < MIN_PERIOD) { if (period < (MIN_PERIOD * 2)) {
dir = 1; dir = 1;
period = MIN_PERIOD; period = MIN_PERIOD * 2;
} }
} }