e2b38e02bf
Enable HW PWM driver instead of the SW one on nRF SoCs where the PWM peripheral is present. Default PWM instances are also enabled on Nordic DK boards so that it is possible to build the basic fade_led sample for them without extra adjustments. After the above changes are applied, some configuration alterations in basic samples blink_led and fade_led become no longer needed. These are removed. And the blink_led sample is corrected so that it works with the nRF HW PWM driver as well. Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file Sample app to demonstrate PWM.
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*
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* This app uses PWM[0].
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*/
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#include <zephyr.h>
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#include <misc/printk.h>
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#include <device.h>
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#include <pwm.h>
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#if defined(CONFIG_SOC_STM32F401XE) || defined(CONFIG_SOC_STM32F412ZG) || \
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defined(CONFIG_SOC_STM32F413XX) || defined(CONFIG_SOC_STM32L476XG) || \
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defined(CONFIG_SOC_STM32F407XG) || defined(CONFIG_SOC_STM32F302X8)
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#define PWM_DRIVER DT_PWM_STM32_2_DEV_NAME
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#define PWM_CHANNEL 1
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#elif CONFIG_SOC_STM32F103XB
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#define PWM_DRIVER DT_PWM_STM32_1_DEV_NAME
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#define PWM_CHANNEL 1
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#elif defined(CONFIG_SOC_QUARK_SE_C1000) || defined(CONFIG_SOC_QUARK_D2000)
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#define PWM_DRIVER CONFIG_PWM_QMSI_DEV_NAME
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#define PWM_CHANNEL 0
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#elif defined(CONFIG_SOC_FAMILY_NRF)
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#if defined(CONFIG_PWM_NRF5_SW)
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#define PWM_DRIVER CONFIG_PWM_NRF5_SW_0_DEV_NAME
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#else
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#define PWM_DRIVER CONFIG_PWM_0_NAME
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#endif /* CONFIG_PWM_NRF5_SW */
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#define PWM_CHANNEL LED0_GPIO_PIN
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#elif defined(CONFIG_BOARD_COLIBRI_IMX7D_M4)
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#define PWM_DRIVER PWM_1_LABEL
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#define PWM_CHANNEL 0
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#elif defined(PWM_LED0_PWM_CONTROLLER) && defined(PWM_LED0_PWM_CHANNEL)
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/* get the defines from dt (based on alias 'pwm-led0') */
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#define PWM_DRIVER PWM_LED0_PWM_CONTROLLER
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#define PWM_CHANNEL PWM_LED0_PWM_CHANNEL
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#else
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#error "Choose supported PWM driver"
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#endif
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/* in micro second */
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#define MIN_PERIOD (USEC_PER_SEC / 64)
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/* in micro second */
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#define MAX_PERIOD USEC_PER_SEC
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void main(void)
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{
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struct device *pwm_dev;
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u32_t period = MAX_PERIOD;
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u8_t dir = 0U;
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printk("PWM demo app-blink LED\n");
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pwm_dev = device_get_binding(PWM_DRIVER);
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if (!pwm_dev) {
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printk("Cannot find %s!\n", PWM_DRIVER);
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return;
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}
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while (1) {
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if (pwm_pin_set_usec(pwm_dev, PWM_CHANNEL,
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period, period / 2)) {
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printk("pwm pin set fails\n");
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return;
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}
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if (dir) {
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period *= 2;
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if (period > MAX_PERIOD) {
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dir = 0U;
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period = MAX_PERIOD;
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}
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} else {
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period /= 2;
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if (period < MIN_PERIOD) {
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dir = 1U;
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period = MIN_PERIOD;
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}
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}
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k_sleep(MSEC_PER_SEC * 4);
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}
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}
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