Add full ringbuffer @PL2303

F0:F030,F042,F072/PL2303_ringbuffer/hardware.c

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the pl2303 project.
+ * Copyright 2022 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 "hardware.h"
+
+static inline void gpio_setup(){
+    // here we turn on clocking for all periph.
+    RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
+    LED_off(LED0);
+    LED_off(LED1);
+    // Set LEDs (PB0/1) as output
+    GPIOB->MODER = (GPIOB->MODER & ~(GPIO_MODER_MODER0 | GPIO_MODER_MODER1)
+                    ) |
+                    GPIO_MODER_MODER0_O | GPIO_MODER_MODER1_O;
+}
+
+void hw_setup(){
+    gpio_setup();
+}
+