display support + extra generic buttons

components/display/component.mk

@@ -0,0 +1,10 @@
+#
+# Component Makefile
+#
+# This Makefile should, at the very least, just include $(SDK_PATH)/Makefile. By default,
+# this will take the sources in the src/ directory, compile them and link them into
+# lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
+# please read the SDK documents if you need to do this.
+#
+
+COMPONENT_ADD_INCLUDEDIRS := .

components/display/text.c

@@ -0,0 +1,128 @@
+/* 
+ *  (c) 2004,2006 Richard Titmuss for SlimProtoLib 
+ *  (c) Philippe G. 2019, philippe_44@outlook.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 <string.h>
+#include <ctype.h>
+#include <arpa/inet.h>
+
+#include "esp_log.h"
+
+#define LINELEN 60
+#define TAG "display"
+
+//Change special LCD chars to something more printable on screen
+unsigned char printable(unsigned char c) {
+   switch (c) {
+	  case 11:		/* block */
+		 return '#';
+	 break;;
+	  case 16:		/* rightarrow */
+		 return '>';
+	 break;;
+	  case 22:		/* circle */
+		 return '@';
+	 break;;
+	  case 145:		/* note */
+	 return ' ';
+	 break;;
+	  case 152:		/* bell */
+		 return 'o';
+	 break;;
+	  default:
+		 return c;
+	  }
+}
+
+// Replace unprintable symbols in line
+void makeprintable(unsigned char * line) {
+	for (int n=0; n < LINELEN; n++) line[n] = printable(line[n]);
+}
+
+// Show the display
+void show_display_buffer(char *ddram) {
+	char line1[LINELEN+1];
+	char *line2;
+
+	memset(line1, 0, LINELEN+1);
+	strncpy(line1, ddram, LINELEN);
+	line2 = &(ddram[LINELEN]);
+	line2[LINELEN] = '\0';
+
+	/* Convert special LCD chars */
+	makeprintable((unsigned char *)line1);
+	makeprintable((unsigned char *)line2);
+	ESP_LOGI(TAG, "\n\t%.40s\n\t%.40s", line1, line2);
+}
+
+// Check if char is printable, or a valid symbol
+bool charisok(unsigned char c) {
+   switch (c) {
+	  case 11:		/* block */
+	  case 16:		/* rightarrow */
+	  case 22:		/* circle */
+	  case 145:		/* note */
+	  case 152:		/* bell */
+		 return true;
+	 break;;
+	  default:
+		 return isprint(c);
+   }
+}
+
+// Process display data
+void vfd_data( unsigned short *data, int bytes_read) {
+	unsigned short *display_data;
+	char ddram[LINELEN * 2];
+	int n;
+	int addr = 0; /* counter */
+
+	if (bytes_read % 2) bytes_read--; /* even number of bytes */
+	display_data = &(data[6]); /* display data starts at byte 12 */
+
+	memset(ddram, ' ', LINELEN * 2);
+	for (n=0; n<(bytes_read/2); n++) {
+		unsigned short d; /* data element */
+		unsigned char t, c;
+
+		d = ntohs(display_data[n]);
+		t = (d & 0x00ff00) >> 8; /* type of display data */
+		c = (d & 0x0000ff); /* character/command */
+		switch (t) {
+			case 0x03: /* character */
+				if (!charisok(c)) c = ' ';
+				if (addr <= LINELEN * 2) {
+					ddram[addr++] = c;
+		}
+				break;
+			case 0x02: /* command */
+				switch (c) {
+					case 0x06: /* display clear */
+						memset(ddram, ' ', LINELEN * 2);
+			break;
+					case 0x02: /* cursor home */
+						addr = 0;
+						break;
+					case 0xc0: /* cursor home2 */
+						addr = LINELEN;
+						break;
+				}
+		}
+	}
+	show_display_buffer(ddram);
+}