restructuring

deprecated/F1/distance_meters/hardware_ini.c

@@ -0,0 +1,57 @@
+/*
+ * hardware_ini.c - functions for HW initialisation
+ *
+ * Copyright 2014 Edward V. Emelianov <eddy@sao.ru, 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+/*
+ * All hardware-dependent initialisation & definition should be placed here
+ * and in hardware_ini.h
+ *
+ */
+
+#include "main.h"
+#include "hardware_ini.h"
+
+/**
+ * GPIO initialisaion: clocking + pins setup
+ */
+void GPIO_init(){
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN |
+			RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_IOPDEN |
+			RCC_APB2ENR_IOPEEN);
+/*
+	// USB_DISC: push-pull
+	gpio_set_mode(USB_DISC_PORT, GPIO_MODE_OUTPUT_2_MHZ,
+				GPIO_CNF_OUTPUT_PUSHPULL, USB_DISC_PIN);
+	// USB_POWER: open drain, externall pull down with R7 (22k)
+	gpio_set_mode(USB_POWER_PORT, GPIO_MODE_INPUT,
+				GPIO_CNF_INPUT_FLOAT, USB_POWER_PIN);
+*/
+}
+
+/*
+ * SysTick used for system timer with period of 1ms
+ */
+void SysTick_init(){
+	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8); // Systyck: 72/8=9MHz
+	systick_set_reload(8999); // 9000 pulses: 1kHz
+	systick_interrupt_enable();
+	systick_counter_enable();
+}
+