Add oven PWM controller

stm-firmware/include/reflow-controller/oven-driver.h

@@ -27,4 +27,6 @@ void oven_driver_init(void);
 
 void oven_driver_set_power(uint8_t power);
 
+void oven_driver_disable(void);
+
 #endif /* __OVEN_DRIVER_H__ */

stm-firmware/include/reflow-controller/periph-config/oven-driver-hwcfg.h

@@ -0,0 +1,33 @@
+/* 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/>.
+*/
+
+#ifndef __OVEN_DRIVER_HWCFG_H__
+#define __OVEN_DRIVER_HWCFG_H__
+
+#include <stm32/stm32f4xx.h>
+
+#define OVEN_CONTROLLER_PWM_TIMER TIM3
+#define OVEN_CONTROLLER_PORT GPIOB
+#define OVEN_CONTROLLER_PIN (0)
+#define OVEN_CONTROLLER_PORT_RCC_MASK RCC_AHB1ENR_GPIOBEN
+#define OVEN_CONTROLLER_TIM_RCC_MASK RCC_APB1ENR_TIM3EN
+#define OVEN_CONTROLLER_PIN_ALTFUNC (2)
+
+#endif /* __OVEN_DRIVER_HWCFG_H__ */

stm-firmware/include/stm-periph/stm32-gpio-macros.h

@@ -27,7 +27,7 @@
 #define PULLUP(pin) (0x1U << ((pin)* 2))
 #define ALTFUNC(pin) ((0x2) << ((pin) * 2))
 #define PINMASK(pin) ((0x3) << ((pin) * 2))
-#define SETAF(PORT,PIN,AF)  PORT->AFR[((PIN) < 8 ? 0 : 1)] |= AF << (((PIN) < 8 ? (PIN) : ((PIN) - 8)) * 4)
+#define SETAF(PORT,PIN,AF)  PORT->AFR[((PIN) < 8 ? 0 : 1)] |= (AF) << (((PIN) < 8 ? (PIN) : ((PIN) - 8)) * 4)
 #define ANALOG(pin)  (0x03 << ((pin) * 2))
 #define OTYP_OPENDRAIN(pin) (0x1U << (pin))
 

stm-firmware/main.c

@@ -236,6 +236,9 @@ int main()
 		button = button_read_event();
 		rot = rotary_encoder_get_abs_val();
 
+		oven_driver_set_power(rot > 100U ? 100U : rot);
+
+
 		/* TODO: handle gui */
 		snprintf(&disp[1][0], 17, "Rotary: %u", (unsigned int)rot);
 		snprintf(&disp[2][0], 17, "Button: %s", (button == BUTTON_SHORT ? "SHORT" : (button == BUTTON_LONG ? "LONG" : "")));

stm-firmware/oven-driver.c

@@ -19,13 +19,41 @@
 */
 
 #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));
 }