restructuring

F0:F030,F042,F072/QuadEncoder/protocol.c

@@ -0,0 +1,55 @@
+/*
+ * This file is part of the Chiller project.
+ * Copyright 2018 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"
+#include "protocol.h"
+#include "usart.h"
+
+
+
+/**
+ * @brief process_command - command parser
+ * @param command - command text (all inside [] without spaces)
+ * @return text to send over terminal or NULL
+ */
+char *process_command(const char *command){
+    char *ret = NULL;
+    usart1_sendbuf(); // send buffer (if it is already filled)
+    switch(*command){
+        case '?': // help
+            SEND_BLK(
+                "D - get rotation direction\n"
+                "R - reset\n"
+                "T - get timer value\n"
+                );
+        break;
+        case 'D':
+            if(TIM3->CR1 & TIM_CR1_DIR) SEND("negative\n");
+            else SEND("positive\n");
+        break;
+        case 'R': // reset MCU
+            NVIC_SystemReset();
+        break;
+        case 'T':
+            put_string("TIM3->CNT=");
+            put_uint(TIM3->CNT);
+            put_char('\n');
+        break;
+    }
+    usart1_sendbuf();
+    return ret;
+}