restructuring

deprecated/F1/keyboard_snippet/main.c

@@ -0,0 +1,73 @@
+/*
+ * main.c
+ *
+ * Copyright 2015 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.
+ */
+
+#include "ocm.h"
+#include "usbkeybrd.h"
+
+volatile uint32_t Timer = 0; // global timer (milliseconds)
+
+/*
+ * 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();
+}
+
+int main(void){
+	uint32_t oldT = 0;
+
+	rcc_clock_setup_in_hsi_out_48mhz();
+	SysTick_init();
+/*
+	// if PC11 connected to usb 1.5kOhm pull-up through transistor
+	rcc_periph_clock_enable(RCC_GPIOC);
+	gpio_set(GPIOC, GPIO11);
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
+		      GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
+*/
+	usbkeybrd_setup();
+/*
+	int i;
+	for (i = 0; i < 0x80000; i++)
+		__asm__("nop");
+	gpio_clear(GPIOC, GPIO11);
+*/
+	uint32_t seconds_ctr = 0;
+	while (1){
+		poll_usbkeybrd();
+		if(Timer - oldT > 999 || oldT > Timer){
+			print_int(seconds_ctr++);
+			newline();
+			oldT = Timer;
+		}
+	}
+}
+
+/**
+ * SysTick interrupt: increment global time & send data buffer through USB
+ */
+void sys_tick_handler(){
+	Timer++;
+	process_usbkbrd();
+}