1 files changed, 126 insertions, 0 deletions
diff --git a/avr/con-utils.c b/avr/con-utils.c
new file mode 100644
index 0000000..5ea19fd
--- /dev/null
+++ b/avr/con-utils.c
@@ -0,0 +1,126 @@
+/*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include "common.h"
+#include <avr/wdt.h>
+
+#include "config.h"
+#include "serial.h"
+#include "background.h"
+#include "con-utils.h"
+
+uint_fast8_t tstc(void)
+{
+	bg_shed();
+	return serial_tstc();
+}
+
+int my_getchar(uint_fast8_t waitforchar)
+{
+	int c;
+
+	do {
+		bg_shed();
+		c = serial_getc();
+	} while ((c < 0) && waitforchar);
+
+#ifdef CONFIG_SYS_FBOOTSIG
+	if (c < 0)
+		return c;
+
+	static const FLASH unsigned char bootsig[] = {CONFIG_SYS_FBOOTSIG};
+	static uint8_t pb;
+	unsigned char uc = c;
+
+
+	if (bootsig[pb] == 0) {
+		if (uc == 0xff) {
+			wdt_enable(WDTO_15MS);
+			for(;;)
+				;
+		} else
+			pb = 0;
+
+	} else {
+		if (bootsig[pb] == uc)
+			pb++;
+		else
+			pb = 0;
+	}
+#endif
+
+	return c;
+}
+
+
+/* test if ctrl-c was pressed */
+
+static uint_fast8_t ctrlc_disabled;	/* see disable_ctrl() */
+static uint_fast8_t ctrlc_was_pressed;
+
+uint_fast8_t ctrlc(void)
+{
+	bg_shed();
+	if (!ctrlc_disabled) {
+		switch (serial_getc()) {
+		case 0x03:		/* ^C - Control C */
+			ctrlc_was_pressed = 1;
+			return 1;
+		default:
+			break;
+		}
+	}
+	return 0;
+}
+
+/* Reads user's confirmation.
+   Returns 1 if user's input is "y", "Y", "yes" or "YES"
+*/
+uint_fast8_t confirm_yesno(void)
+{
+	unsigned int i;
+	char str_input[5];
+
+	/* Flush input */
+	while (serial_getc())
+		;
+	i = 0;
+	while (i < sizeof(str_input)) {
+		str_input[i] = my_getchar(1);
+		putchar(str_input[i]);
+		if (str_input[i] == '\r')
+			break;
+		i++;
+	}
+	putchar('\n');
+	if (strncmp(str_input, "y\r", 2) == 0 ||
+	    strncmp(str_input, "Y\r", 2) == 0 ||
+	    strncmp(str_input, "yes\r", 4) == 0 ||
+	    strncmp(str_input, "YES\r", 4) == 0)
+		return 1;
+	return 0;
+}
+
+/* pass 1 to disable ctrlc() checking, 0 to enable.
+ * returns previous state
+ */
+uint_fast8_t disable_ctrlc(uint_fast8_t disable)
+{
+	uint_fast8_t prev = ctrlc_disabled;	/* save previous state */
+
+	ctrlc_disabled = disable;
+	return prev;
+}
+
+uint_fast8_t had_ctrlc (void)
+{
+	return ctrlc_was_pressed;
+}
+
+void clear_ctrlc(void)
+{
+	ctrlc_was_pressed = 0;
+}