From 0aa70faa3d1fb9a9f8b841bbef38068ead014ac3 Mon Sep 17 00:00:00 2001
From: Hauke Petersen <hauke.petersen@fu-berlin.de>
Date: Wed, 7 Dec 2016 12:55:39 +0100
Subject: [PATCH] cpu/stm32f2: temporarily removed PWM driver
---
boards/nucleo-f207/Makefile.features | 1 -
cpu/stm32f2/periph/pwm.c | 219 ---------------------------
2 files changed, 220 deletions(-)
delete mode 100644 cpu/stm32f2/periph/pwm.c
diff --git a/boards/nucleo-f207/Makefile.features b/boards/nucleo-f207/Makefile.features
index 0458cbfedf..b53a6d772e 100644
--- a/boards/nucleo-f207/Makefile.features
+++ b/boards/nucleo-f207/Makefile.features
@@ -2,7 +2,6 @@
FEATURES_PROVIDED += periph_cpuid
FEATURES_PROVIDED += periph_gpio
FEATURES_PROVIDED += periph_i2c
-FEATURES_PROVIDED += periph_pwm
FEATURES_PROVIDED += periph_rtc
FEATURES_PROVIDED += periph_spi
FEATURES_PROVIDED += periph_timer
diff --git a/cpu/stm32f2/periph/pwm.c b/cpu/stm32f2/periph/pwm.c
deleted file mode 100644
index 699d00dba4..0000000000
--- a/cpu/stm32f2/periph/pwm.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright (C) 2015 Engineering-Spirit
- * Copyright (C) 2016 OTA keys S.A.
- *
- * This file is subject to the terms and conditions of the GNU Lesser General
- * Public License v2.1. See the file LICENSE in the top level directory for more
- * details.
- */
-
-/**
- * @ingroup cpu_stm32f2
- * @{
- *
- * @file
- * @brief Low-level PWM driver implementation
- *
- * @author Hauke Petersen <mail@haukepetersen.de>
- * @author Fabian Nack <nack@inf.fu-berlin.de>
- * @author Nick v. IJzendoorn <nijzendoorn@engineering-spirit.nl>
- * @author Aurelien Gonce <aurelien.gonce@altran.fr>
- *
- * @}
- */
-
-#include <stdint.h>
-#include <string.h>
-
-#include "cpu.h"
-#include "periph/pwm.h"
-#include "periph_conf.h"
-#include "periph/timer.h"
-
-/* ignore file in case no PWM devices are defined */
-#if (PWM_NUMOF > 0)
-
-/**
- * @brief Get the timer device
- */
-static inline TIM_TypeDef *get_tim_dev(pwm_t tim)
-{
- return timer_config[tim].dev;
-}
-
-/**
- * @brief Get the pwm device
- */
-static inline GPIO_TypeDef *get_pwm_port(pwm_t pwm)
-{
- return pwm_config[pwm].port;
-}
-
-uint32_t pwm_init(pwm_t dev, pwm_mode_t mode, uint32_t freq, uint16_t res)
-{
- GPIO_TypeDef *port = get_pwm_port(dev);
- tim_t tim = pwm_config[dev].tim;
- TIM_TypeDef *timer_dev = get_tim_dev(tim);
- uint8_t channels = pwm_channels(tim);
- uint32_t pins[channels];
-
- /* enable timer peripheral clock */
- pwm_poweron(tim);
-
- /* pins configuration */
- pins[0] = pwm_config[dev].CH0;
- if (channels > 1) {
- pins[1] = pwm_config[dev].CH1;
- }
- if (channels > 2) {
- pins[2] = pwm_config[dev].CH2;
- }
- if (channels > 3) {
- pins[3] = pwm_config[dev].CH3;
- }
-
- /* enable pwm peripheral */
- if (pwm_config[dev].bus == AHB1) {
- RCC->AHB1ENR |= pwm_config[dev].rcc_mask;
- } else if (pwm_config[dev].bus == AHB2) {
- RCC->AHB2ENR |= pwm_config[dev].rcc_mask;
- } else {
- RCC->AHB3ENR |= pwm_config[dev].rcc_mask;
- }
-
- /* setup pins: alternate function */
- for (int i = 0; i < channels; i++) {
- port->MODER &= ~(3 << (pins[i] * 2));
- port->MODER |= (2 << (pins[i] * 2));
- if (pins[i] < 8) {
- port->AFR[0] &= ~(0xf << (pins[i] * 4));
- port->AFR[0] |= (pwm_config[dev].AF << (pins[i] * 4));
- } else {
- port->AFR[1] &= ~(0xf << ((pins[i] - 8) * 4));
- port->AFR[1] |= (pwm_config[dev].AF << ((pins[i] - 8) * 4));
- }
- }
-
- /* Reset C/C and timer configuration register */
- switch (channels) {
- case 4:
- timer_dev->CCR4 = 0;
- /* Fall through */
- case 3:
- timer_dev->CCR3 = 0;
- timer_dev->CR2 = 0;
- /* Fall through */
- case 2:
- timer_dev->CCR2 = 0;
- /* Fall through */
- case 1:
- timer_dev->CCR1 = 0;
- timer_dev->CR1 = 0;
- break;
- }
-
- /* set prescale and auto-reload registers to matching values for resolution and frequency */
- if (res > 0xffff || (res * freq) > timer_config[tim].freq) {
- return 0;
- }
- timer_dev->PSC = (timer_config[tim].freq / (res * freq)) - 1;
- timer_dev->ARR = res - 1;
- /* calculate the actual PWM frequency */
- freq = (timer_config[tim].freq / (res * (timer_dev->PSC + 1)));
-
- /* set PWM mode */
- switch (mode) {
- case PWM_LEFT:
- timer_dev->CCMR1 = (TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 |
- TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2);
- if (channels > 2) {
- timer_dev->CCMR2 = (TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 |
- TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2);
- }
- break;
- case PWM_RIGHT:
- timer_dev->CCMR1 = (TIM_CCMR1_OC1M_0 | TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 |
- TIM_CCMR1_OC2M_0 | TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2);
- if (channels > 2) {
- timer_dev->CCMR2 = (TIM_CCMR2_OC3M_0 | TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 |
- TIM_CCMR2_OC4M_0 | TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2);
- }
- break;
- case PWM_CENTER:
- timer_dev->CCMR1 = 0;
- if (channels > 2) {
- timer_dev->CCMR2 = 0;
- }
- timer_dev->CR1 |= (TIM_CR1_CMS_0 | TIM_CR1_CMS_1);
- break;
- }
-
- /* enable output on PWM pins */
- timer_dev->CCER = (TIM_CCER_CC1E | TIM_CCER_CC2E | TIM_CCER_CC3E | TIM_CCER_CC4E);
-
- /* enable PWM outputs */
- timer_dev->BDTR = TIM_BDTR_MOE;
-
- /* enable timer ergo the PWM generation */
- pwm_start(tim);
-
- return freq;
-}
-
-uint8_t pwm_channels(pwm_t dev) {
- return (timer_config[dev].channels);
-}
-
-void pwm_set(pwm_t dev, uint8_t channel, uint16_t value)
-{
- tim_t tim = pwm_config[dev].tim;
- TIM_TypeDef *timer_dev = get_tim_dev(tim);
-
- if (channel >= pwm_channels(tim)) {
- return;
- }
-
- /* norm value to maximum possible value */
- if (value > timer_dev->ARR) {
- value = (uint16_t) timer_dev->ARR;
- }
-
- switch (channel) {
- case 0:
- timer_dev->CCR1 = value;
- break;
- case 1:
- timer_dev->CCR2 = value;
- break;
- case 2:
- timer_dev->CCR3 = value;
- break;
- case 3:
- timer_dev->CCR4 = value;
- break;
- default:
- break;
- }
-}
-
-void pwm_start(pwm_t dev)
-{
- get_tim_dev(dev)->CR1 |= TIM_CR1_CEN;
-}
-
-void pwm_stop(pwm_t dev)
-{
- get_tim_dev(dev)->CR1 &= ~(TIM_CR1_CEN);
-}
-
-void pwm_poweron(pwm_t dev)
-{
- periph_clk_en(timer_config[dev].bus, timer_config[dev].rcc_mask);
-}
-
-void pwm_poweroff(pwm_t dev)
-{
- periph_clk_dis(timer_config[dev].bus, timer_config[dev].rcc_mask);
-}
-
-#endif /* PWM_NUMOF > 0*/
--
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