/************************************************************************************ * configs/nucleo-l432kc/src/stm32l4_pwm.c * * Copyright (C) 2011, 2015-2016 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Copyright (C) 2016 Sebastien Lorquet. All rights reserved. * Author: Sebastien Lorquet * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ************************************************************************************/ /************************************************************************************ * Included Files ************************************************************************************/ #include #include #include #include #include #include #include "chip.h" #include "up_arch.h" #include "stm32l4_pwm.h" #include "nucleo-l432kc.h" /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ /* Configuration *******************************************************************/ /* PWM * * The STM3240G-Eval has no real on-board PWM devices, but the board can be * configured to output a pulse train using variously unused pins on the board for * PWM output (see board.h for details of pins). */ #ifdef CONFIG_PWM /************************************************************************************ * Public Functions ************************************************************************************/ /************************************************************************************ * Name: stm32l4_pwm_setup * * Description: * Initialize PWM and register the PWM device. * ************************************************************************************/ int stm32l4_pwm_setup(void) { static bool initialized = false; struct pwm_lowerhalf_s *pwm; int ret; /* Have we already initialized? */ if (!initialized) { /* Call stm32l4_pwminitialize() to get an instance of the PWM interface */ /* PWM * * The Nucleo-l432kc has no real on-board PWM devices, but the board can be * configured to output a pulse train using TIM1 or 8, or others (see board.h). * Let's figure out which the user has configured. */ #if defined(CONFIG_STM32L4_TIM1_PWM) pwm = stm32l4_pwminitialize(1); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm0" */ ret = pwm_register("/dev/pwm0", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM2_PWM) pwm = stm32l4_pwminitialize(2); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm1" */ ret = pwm_register("/dev/pwm1", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM3_PWM) pwm = stm32l4_pwminitialize(3); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm2" */ ret = pwm_register("/dev/pwm2", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM4_PWM) pwm = stm32l4_pwminitialize(4); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm3" */ ret = pwm_register("/dev/pwm3", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM5_PWM) pwm = stm32l4_pwminitialize(5); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm4" */ ret = pwm_register("/dev/pwm4", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM8_PWM) pwm = stm32l4_pwminitialize(8); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm5" */ ret = pwm_register("/dev/pwm5", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM15_PWM) pwm = stm32l4_pwminitialize(15); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm6" */ ret = pwm_register("/dev/pwm6", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM16_PWM) pwm = stm32l4_pwminitialize(16); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm7" */ ret = pwm_register("/dev/pwm7", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif #if defined(CONFIG_STM32L4_TIM17_PWM) pwm = stm32l4_pwminitialize(17); if (!pwm) { aerr("ERROR: Failed to get the STM32L4 PWM lower half\n"); return -ENODEV; } /* Register the PWM driver at "/dev/pwm8" */ ret = pwm_register("/dev/pwm8", pwm); if (ret < 0) { aerr("ERROR: pwm_register failed: %d\n", ret); return ret; } #endif /* Now we are initialized */ initialized = true; } return OK; } #endif /* CONFIG_PWM */