reflow-oven-control-sw/stm-firmware/oven-driver.c

/* Reflow Oven Controller
*
* Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/

#include <reflow-controller/oven-driver.h>
#include <reflow-controller/periph-config/oven-driver-hwcfg.h>
#include <stm-periph/clock-enable-manager.h>

void oven_driver_init()
{
	rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(OVEN_CONTROLLER_PORT_RCC_MASK));
	rcc_manager_enable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(OVEN_CONTROLLER_TIM_RCC_MASK));

	OVEN_CONTROLLER_PORT->MODER &= MODER_DELETE(OVEN_CONTROLLER_PIN);
	OVEN_CONTROLLER_PORT->MODER |= ALTFUNC(OVEN_CONTROLLER_PIN);
	SETAF(OVEN_CONTROLLER_PORT, OVEN_CONTROLLER_PIN, OVEN_CONTROLLER_PIN_ALTFUNC);

	OVEN_CONTROLLER_PWM_TIMER->CR2 = 0UL;

	OVEN_CONTROLLER_PWM_TIMER->CCMR2 = TIM_CCMR2_OC3M;
	OVEN_CONTROLLER_PWM_TIMER->CCER = TIM_CCER_CC3E | TIM_CCER_CC3P;

	OVEN_CONTROLLER_PWM_TIMER->ARR = 1000U;
	OVEN_CONTROLLER_PWM_TIMER->PSC = 42000U - 1U;

	OVEN_CONTROLLER_PWM_TIMER->CR1 = TIM_CR1_CMS | TIM_CR1_CEN;
}

void oven_driver_set_power(uint8_t power)
{
	if (power > 100U)
		power = 100U;

	OVEN_CONTROLLER_PWM_TIMER->CCR3 = power * 10;
}

void oven_driver_disable()
{
	OVEN_CONTROLLER_PWM_TIMER->CR1 = 0UL;
	OVEN_CONTROLLER_PWM_TIMER->CR2 = 0UL;
	rcc_manager_disable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(OVEN_CONTROLLER_PORT_RCC_MASK));
	rcc_manager_disable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(OVEN_CONTROLLER_TIM_RCC_MASK));
}