start adding PWM

F0:F030,F042,F072/usbcan_gpio/pwm.c

@@ -0,0 +1,32 @@
+/*
+ * This file is part of the usbcangpio project.
+ * Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pwm.h"
+
+/*
+ * initial setup of all available PWM timers / channels:
+ * TIM1 / 2 3
+ * TIM2 / 2 3 4
+ * TIM3 / 1 2 3 4
+ * TIM14 / 1
+ * TIM16 / 1
+ */
+
+void pwm_setup(){
+    ;
+}