int board_pwm_setup(void)
{
static bool initialized = false;
struct pwm_lowerhalf_s *pwm;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
pwm = stm32_pwminitialize(NUCLEO_F303RE_PWMTIMER);
if (pwm == NULL)
{
pwmerr("ERROR: Failed to get the STM32 PWM lower half\n");
return -ENODEV;
}
/* Register the PWM driver at "/dev/pwm0" */
ret = pwm_register("/dev/pwm0", pwm);
if (ret < 0)
{
pwmerr("ERROR: pwm_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}
int pwm_devinit(void)
{
static bool initialized = false;
struct pwm_lowerhalf_s *pwm;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
pwm = stm32_pwminitialize(STM32F4DISCOVERY_PWMTIMER);
if (!pwm)
{
dbg("Failed to get the STM32 PWM lower half\n");
return -ENODEV;
}
/* Register the PWM driver at "/dev/pwm0" */
ret = pwm_register("/dev/pwm0", pwm);
if (ret < 0)
{
adbg("pwm_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}
int stm32_tone_setup(void)
{
static bool initialized = false;
struct pwm_lowerhalf_s *tone;
struct pwm_info_s info;
struct oneshot_lowerhalf_s *oneshot = NULL;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
tone = stm32_pwminitialize(TONE_PWM_TIMER);
if (!tone)
{
auderr("Failed to get the STM32 PWM lower half to AUDIO TONE\n");
return -ENODEV;
}
/* Initialize TONE PWM */
tone->ops->setup(tone);
tone->ops->start(tone, &info);
/* Initialize ONESHOT Timer */
oneshot = oneshot_initialize(ONESHOT_TIMER, OST_RES);
if (!oneshot)
{
auderr("Failed to initialize ONESHOT Timer!\n");
return -ENODEV;
}
/* Register the Audio Tone driver at "/dev/tone0" */
ret = tone_register("/dev/tone0", tone, oneshot);
if (ret < 0)
{
auderr("ERROR: tone_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}
int stm32_rgbled_setup(void)
{
static bool initialized = false;
struct pwm_lowerhalf_s *ledr;
struct pwm_lowerhalf_s *ledg;
struct pwm_lowerhalf_s *ledb;
struct pwm_info_s info;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
ledr = stm32_pwminitialize(1);
if (!ledr)
{
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDR\n");
return -ENODEV;
}
/* Define frequency and duty cycle */
info.frequency = 100;
info.duty = 0;
/* Initialize LED R */
ledr->ops->setup(ledr);
ledr->ops->start(ledr, &info);
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
ledg = stm32_pwminitialize(2);
if (!ledg)
{
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDG\n");
return -ENODEV;
}
/* Initialize LED G */
ledg->ops->setup(ledg);
ledg->ops->start(ledg, &info);
/* Call stm32_pwminitialize() to get an instance of the PWM interface */
ledb = stm32_pwminitialize(3);
if (!ledb)
{
lederr("ERROR: Failed to get the STM32 PWM lower half to LEDB\n");
return -ENODEV;
}
/* Initialize LED B */
ledb->ops->setup(ledb);
ledb->ops->start(ledb, &info);
/* Register the RGB LED diver at "/dev/rgbled0" */
ret = rgbled_register("/dev/rgbled0", ledr, ledg, ledb);
if (ret < 0)
{
lederr("ERROR: rgbled_register failed: %d\n", ret);
return ret;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}