font on flash, ftostr

include/stdlib.h

@@ -41,6 +41,8 @@ char *snprintf(char *buf, unsigned int max, const char *format, ...);
  */
 float strtof(const char *s, char **endptr);
 
+char *ftostr(char *buf, float f);
+
 /**
  * Attempts to convert the given string to an integer.
  * @param s the string to convert

initrd/graph

@@ -40,7 +40,7 @@ func(makegrid) {
 # BIG LOOP - ask for equ, graph it
 #
 
-makegrid
+makegrid()
 clearcmd = "clear"
 while (1) {
 	rect(0, 0, 480, 40, 0)
@@ -48,7 +48,7 @@ while (1) {
 	Fx = gets()
 
 	if (Fx == clearcmd) {
-		makegrid
+		makegrid()
 	} else {
 		# do function
 		x = xmin

src/display_draw.c

@@ -20,6 +20,8 @@
 
 #include <display_draw.h>
 #include <display.h>
+#include <flash.h>
+#include <heap.h>
 #include <task.h>
 #include <clock.h>
 
@@ -32,7 +34,8 @@ static unsigned int cury = 0;
 static unsigned int curxo = 0;
 static unsigned int curyo = 0;
 
-extern const unsigned char inconsolata24[192 * 156 * 2 + 1];
+//extern const unsigned char inconsolata24[192 * 156 * 2 + 1];
+static unsigned char *inconsolata24;
 
 void task_cursor(void)
 {
@@ -48,6 +51,9 @@ void task_cursor(void)
 
 void dsp_cursoron(void)
 {
+	inconsolata24 = malloc(192 * 156 * 2);
+	flash_read((char *)inconsolata24, 0, 192 * 156 * 2);
+
 	task_start(task_cursor, 512);
 }
 

src/flash.c

@@ -38,6 +38,10 @@ void flash_init(void)
 	gpio_mode(SI, OUTPUT);
 	gpio_mode(CS, OUTPUT);
 	gpio_mode(SO, OUTPUT);
+	gpio_speed(SCK, VERYHIGH);
+	gpio_speed(SI, VERYHIGH);
+	gpio_speed(SO, VERYHIGH);
+	gpio_speed(CS, VERYHIGH);
 	gpio_dout(SO, 0);
 	gpio_mode(SO, INPUT);
 	gpio_dout(CS, 1);
@@ -50,14 +54,28 @@ void flash_read(char *buf, uint32_t addr, unsigned int count)
 	if (buf == 0)
 		return;
 
-	char *spibuf = malloc(count + 4);
+	char *spibuf = malloc(1028);
+	unsigned int c = count / 1024;
+	unsigned int i = 0;
+	uint32_t paddr = addr;
+	for (i = 0; i < c; i++, paddr += 1024) {
+		spibuf[0] = READ;
+		spibuf[1] = (paddr >> 16) & 0xFF;
+		spibuf[2] = (paddr >> 8) & 0xFF;
+		spibuf[3] = paddr & 0xFF;
+		//memcpy(spibuf + 4, buf, count);
+		flash_spi_xchg(spibuf, 1028);
+		memcpy(buf + i * 1024, spibuf + 4, 1024);
+	}
+
+	c = count - i * 1024;
 	spibuf[0] = READ;
-	spibuf[1] = (addr >> 16) & 0xFF;
-	spibuf[2] = (addr >> 8) & 0xFF;
-	spibuf[3] = addr & 0xFF;
-	memcpy(spibuf + 4, buf, count);
-	flash_spi_xchg(spibuf, count + 4);
-	memcpy(buf, spibuf + 4, count);
+	spibuf[1] = (paddr >> 16) & 0xFF;
+	spibuf[2] = (paddr >> 8) & 0xFF;
+	spibuf[3] = paddr & 0xFF;
+	flash_spi_xchg(spibuf, 4 + c);
+	memcpy(buf + i * 1024, spibuf + 4, c);
+
 	free(spibuf);
 }
 

src/main.c

@@ -76,15 +76,14 @@ void kmain(void)
 	dsp_rect(0, 0, LCD_WIDTH, LCD_HEIGHT, dsp_color(0, 0, 0));
 	dsp_cursoron();
 
-	const char *test = "Hey there!";
-	flash_write(test, 0x1FD, 10);
-
-	char *buf = calloc(11, 1);
-	flash_read(buf, 0x1FD, 10);
-	dsp_puts(buf);
-
-	//keypad_start();
-	//task_start(task_interpreter, 4096);
+	/*extern const unsigned char inconsolata24[192 * 156 * 2 + 1];
+	for (uint32_t i = 0; i <= 192 * 156 * 2; i += 624) {
+		flash_write((char *)(inconsolata24 + i), i, 624);
+		dsp_puts(".");
+	}*/
+
+	keypad_start();
+	task_start(task_interpreter, 4096);
 
 	while (1) {
 		gpio_dout(GPIOA, 5, 1);

src/script.c

@@ -53,7 +53,7 @@ int math_sin(instance *it);
 
 void script_loadlib(instance *it)
 {
-	inew_number(it, "pi", 3.1415926f);
+	inew_number(it, "pi", 3.1415926535f);
 
 	inew_cfunc(it, "print", script_puts);
 	inew_cfunc(it, "putchar", script_putchar);
@@ -122,7 +122,8 @@ int script_puts(instance *it)
 	variable *v = igetarg(it, 0);
 	if (v->type == NUMBER) {
 		char buf[33];
-		snprintf(buf, 33, "%d", (int)v->value.f); // TODO
+		//snprintf(buf, 33, "%d", (int)v->value.f); // TODO
+		ftostr(buf, v->value.f);
 		dsp_puts(buf);
 	} else if (v->type == STRING) {
 		dsp_puts((const char *)v->value.p);

src/stdlib.c

@@ -23,7 +23,6 @@
 #include <stdlib.h>
 
 #include <ctype.h>
-#include <heap.h>
 #include <stdarg.h>
 #include <string.h>
 
@@ -134,3 +133,42 @@ int atoi(const char *s)
 
 	return (neg == 0) ? n : -n;
 }
+
+char *ftostr(char *buf, float f)
+{
+	if (buf == 0)
+		return 0;
+
+	unsigned int i = 0; // offset
+
+	// strip decimals, convert in reverse
+	for (int d = f; d != 0; d /= 10)
+		buf[i++] = d % 10 + '0';
+
+	// reverse
+	for (unsigned int j = 0; j < i / 2; j++) {
+		char c = buf[i - j - 1];
+		buf[i - j - 1] = buf[j];
+		buf[j] = c;
+	}
+
+	if ((float)((int)f) == f)
+		goto end;
+
+	buf[i++] = '.';
+
+	// decimals
+	float d = f;
+	// precision of 5 is safe, more gets questionable
+	for (unsigned int p = 0; p < 5; p++) {
+		d *= 10;
+		buf[i++] = (int)d % 10 + '0';
+	}
+
+	// trim 0's
+	for (unsigned int j = i - 1; buf[j] == '0'; j--)
+		buf[j] = '\0';
+end:
+	buf[i] = '\0';
+	return buf;
+}