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cpu/samd21: optimized pin config for PWM driver

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This commit is contained in:
Hauke Petersen 2015-10-22 13:08:39 +02:00
parent 835c2db5a5
commit fe6b3e7d54
1 changed files with 4 additions and 9 deletions
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13
cpu/samd21/periph/pwm.c
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@ -26,8 +26,9 @@
#include "log.h"
#include "cpu.h"
#include "board.h"
#include "periph/gpio.h"
#include "periph/pwm.h"
#include "periph_conf.h"
/* ignore file in case no PWM devices are defined */
#if PWM_NUMOF
@ -109,14 +110,8 @@ int pwm_init(pwm_t dev, pwm_mode_t mode,
/* configure the used pins */
for (int i = 0; i < PWM_MAX_CHANNELS; i++) {
PortGroup *port = pwm_config[dev].chan[i].port;
int pin = pwm_config[dev].chan[i].pin;
int fnct = pwm_config[dev].chan[i].fnct;
/* set pin as output and enable the MUX */
port->DIRSET.reg = (1 << pin);
port->PINCFG[pin].reg = (PORT_PINCFG_PMUXEN);
port->PMUX[pin >> 1].reg &= ~(0xf << (4 * (pin & 0x1)));
port->PMUX[pin >> 1].reg |= (fnct << (4 * (pin & 0x1)));
gpio_init(pwm_config[dev].chan[i].pin, GPIO_DIR_OUT, GPIO_NOPULL);
gpio_init_mux(pwm_config[dev].chan[i].pin, pwm_config[dev].chan[i].mux);
}
/* power on the device */