| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file Sample app to demonstrate PWM. |
| * |
| * This app uses PWM[0]. |
| */ |
| |
| #include <zephyr.h> |
| #include <misc/printk.h> |
| #include <device.h> |
| #include <pwm.h> |
| |
| #if defined(CONFIG_SOC_STM32F401XE) || defined(CONFIG_SOC_STM32F412ZG) || \ |
| defined(CONFIG_SOC_STM32F413XX) || defined(CONFIG_SOC_STM32L476XG) || \ |
| defined(CONFIG_SOC_STM32F407XG) || defined(CONFIG_SOC_STM32F302X8) |
| #define PWM_DRIVER DT_PWM_STM32_2_DEV_NAME |
| #define PWM_CHANNEL 1 |
| #elif CONFIG_SOC_STM32F103XB |
| #define PWM_DRIVER DT_PWM_STM32_1_DEV_NAME |
| #define PWM_CHANNEL 1 |
| #elif defined(CONFIG_SOC_QUARK_SE_C1000) || defined(CONFIG_SOC_QUARK_D2000) |
| #define PWM_DRIVER CONFIG_PWM_QMSI_DEV_NAME |
| #define PWM_CHANNEL 0 |
| #elif defined(CONFIG_SOC_FAMILY_NRF) |
| #if defined(CONFIG_PWM_NRF5_SW) |
| #define PWM_DRIVER CONFIG_PWM_NRF5_SW_0_DEV_NAME |
| #else |
| #define PWM_DRIVER DT_NORDIC_NRF_PWM_PWM_0_LABEL |
| #endif /* CONFIG_PWM_NRF5_SW */ |
| #define PWM_CHANNEL LED0_GPIO_PIN |
| #elif defined(CONFIG_BOARD_COLIBRI_IMX7D_M4) |
| #define PWM_DRIVER PWM_1_LABEL |
| #define PWM_CHANNEL 0 |
| #elif defined(PWM_LED0_PWM_CONTROLLER) && defined(PWM_LED0_PWM_CHANNEL) |
| /* get the defines from dt (based on alias 'pwm-led0') */ |
| #define PWM_DRIVER PWM_LED0_PWM_CONTROLLER |
| #define PWM_CHANNEL PWM_LED0_PWM_CHANNEL |
| #else |
| #error "Choose supported PWM driver" |
| #endif |
| |
| /* in micro second */ |
| #define MIN_PERIOD (USEC_PER_SEC / 64) |
| |
| /* in micro second */ |
| #define MAX_PERIOD USEC_PER_SEC |
| |
| void main(void) |
| { |
| struct device *pwm_dev; |
| u32_t period = MAX_PERIOD; |
| u8_t dir = 0U; |
| |
| printk("PWM demo app-blink LED\n"); |
| |
| pwm_dev = device_get_binding(PWM_DRIVER); |
| if (!pwm_dev) { |
| printk("Cannot find %s!\n", PWM_DRIVER); |
| return; |
| } |
| |
| while (1) { |
| if (pwm_pin_set_usec(pwm_dev, PWM_CHANNEL, |
| period, period / 2)) { |
| printk("pwm pin set fails\n"); |
| return; |
| } |
| |
| if (dir) { |
| period *= 2; |
| |
| if (period > MAX_PERIOD) { |
| dir = 0U; |
| period = MAX_PERIOD; |
| } |
| } else { |
| period /= 2; |
| |
| if (period < MIN_PERIOD) { |
| dir = 1U; |
| period = MIN_PERIOD; |
| } |
| } |
| |
| k_sleep(MSEC_PER_SEC * 4); |
| } |
| } |