starting work on virtual console

console.c

@@ -0,0 +1,103 @@
+/*
+ * console.c
+ *
+ *  Created on: 20 Jun 2012
+ *      Author: Thomas Saunders AKA "Badger"
+ */
+
+#include "ch.h"
+
+#include "fonts.h"
+#include "glcd.h"
+#include "console.h"
+
+
+msg_t lcdConsoleInit(GLCDConsole *console, uint16_t x0, uint16_t y0, uint16_t x1,
+		uint16_t y1, const uint8_t *font, uint8_t *buffer, uint16_t bkcolor, uint16_t color) {
+	const uint8_t* ptr;
+	uint16_t chi;
+	uint16_t x,y;
+	/* read font, get size */
+	/* TODO: this is messy. improve font handling.
+	 * this assumes that all characters are as wide as A */
+	console->fy = font[FONT_TABLE_HEIGHT_IDX];
+	chi = *(uint16_t*)(&font[FONT_TABLE_CHAR_LOOKUP_IDX + ('A'-0x20)*2]);
+	ptr = font + chi;
+	console->fx = *(ptr++);
+
+	/* calculate the size of the console in characters */
+	console->sx = (x1-x0)/console->fx;
+	console->sy = (y1-y0)/console->fy;
+
+	console->cx = 0;
+	console->cy = 0;
+
+	console->buf = buffer;
+	console->bidx = 0;
+}
+
+
+/*
+ * Interface implementation. The interface is write only
+ */
+
+static size_t writes(void *ip, const uint8_t *bp, size_t n) {
+	(void)ip;
+	return lcdWriteString(bp, n);
+}
+
+static size_t reads(void *ip, uint8_t *bp, size_t n) {
+	(void)ip;
+	(void)bp;
+	(void)n;
+	return 0;
+}
+
+static msg_t put(void *ip, uint8_t b) {
+	(void)ip;
+	return lcdDrawChar((char)b);
+}
+
+static msg_t get(void *ip) {
+	(void)ip;
+	return RDY_OK;
+}
+
+static msg_t putt(void *ip, uint8_t b, systime_t timeout) {
+	(void)ip;
+	(void)timeout;
+	/* TODO: handle timeout */
+	return lcdDrawChar((char)b);
+}
+
+static msg_t gett(void *ip, systime_t timeout) {
+	(void)ip;
+	(void)timeout;
+	return RDY_OK;
+}
+
+static size_t writet(void *ip, const uint8_t *bp, size_t n, systime_t time) {
+	(void)ip;
+	(void)time;
+	return lcdWriteString(bp, n);
+}
+
+static size_t readt(void *ip, uint8_t *bp, size_t n, systime_t time) {
+	(void)ip;
+	(void)bp;
+	(void)n;
+	(void)time;
+	return 0;
+}
+
+static chnflags_t getflags(void *ip) {
+  _chn_get_and_clear_flags_impl(ip);
+}
+
+static const struct GLCDConsoleVMT vmt = {
+  writes, reads, put, get,
+  putt, gett, writet, readt,
+  getflags
+};
+
+

console.h

@@ -0,0 +1,63 @@
+#ifndef CONSOLE_H
+#define CONSOLE_H
+
+/**
+ * @brief   Structure representing a GLCD driver.
+ */
+typedef struct GLCDConsole GLCDConsole;
+
+/**
+ * @brief   @p GLCDConsole specific methods.
+ */
+#define _glcd_driver_methods                                              \
+  _base_asynchronous_channel_methods
+
+/**
+ * @extends BaseAsynchronousChannelVMT
+ *
+ * @brief   @p GLCDConsole virtual methods table.
+ */
+struct GLCDConsoleVMT {
+  _glcd_driver_methods
+};
+
+/**
+ * @extends BaseAsynchronousChannel
+ *
+ * @brief   GLCD Console class.
+ * @details This class extends @p BaseAsynchronousChannel by adding physical
+ *          I/O queues.
+ */
+struct GLCDConsole {
+  /** @brief Virtual Methods Table.*/
+  const struct GLCDConsoleVMT *vmt;
+  _base_asynchronous_channel_data
+  /* WARNING: Do not add any data to this struct above this comment, only below */
+  /* text buffer */
+  uint8_t *buf;
+  /* lcd area to use */
+  uint16_t x0,y0,x1,y1;
+  /* current cursor position, in character coordinates (not pixels) */
+  uint16_t cx,cy;
+  /* console size in characters */
+  uint16_t sx,sy;
+  /* foreground and background colour */
+  uint16_t bkcolor, color;
+  /* font size in pixels */
+  uint8_t fx,fy;
+  /* buffer index */
+  uint16_t bidx;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+msg_t lcdConsoleInit(GLCDConsole *console, uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1,
+		const uint8_t *font, uint8_t *buffer, uint16_t bkcolor, uint16_t color);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONSOLE_H */

lcd.mk

@@ -7,6 +7,7 @@ LCDSRC = 	$(LCDLIB)/glcd.c \
 			$(LCDLIB)/touchpad.c \
 			$(LCDLIB)/graph.c \
 			$(LCDLIB)/gui.c \
+			$(LCDLIB)/console.c \
 			$(LCD_DRIVERS_SRC)
 
 LCDINC = 	$(LCDLIB) \