nyx: remove negative decimal external handling

nyx/nyx_gui/frontend/gui.c

@@ -1321,10 +1321,7 @@ static void _update_status_bar(void *params)
 	lv_obj_realign(status_bar.battery);
 
 	// Set battery current draw and voltage.
-	if (batt_curr >= 0)
+	s_printf(label, "#%s%d", batt_curr >= 0 ? "96FF00 +" : "FF3C28 ", batt_curr / 1000);
-		s_printf(label, "#96FF00 +%d", batt_curr / 1000);
-	else
-		s_printf(label, "#FF3C28 -%d", (~batt_curr + 1) / 1000);
 
 	bool voltage_empty = batt_volt < 3200;
 	s_printf(label + strlen(label), " mA# (%s%d mV%s)",

nyx/nyx_gui/frontend/gui_info.c

@@ -2162,16 +2162,10 @@ static lv_res_t _create_window_battery_status(lv_obj_t *btn)
 	s_printf(txt_buf + strlen(txt_buf), "%d mAh\n", value);
 
 	max17050_get_property(MAX17050_Current, &value);
-	if (value >= 0)
 	s_printf(txt_buf + strlen(txt_buf), "%d mA\n", value / 1000);
-	else
-		s_printf(txt_buf + strlen(txt_buf), "-%d mA\n", (~value + 1) / 1000);
 
 	max17050_get_property(MAX17050_AvgCurrent, &value);
-	if (value >= 0)
 	s_printf(txt_buf + strlen(txt_buf), "%d mA\n", value / 1000);
-	else
-		s_printf(txt_buf + strlen(txt_buf), "-%d mA\n", (~value + 1) / 1000);
 
 	max17050_get_property(MAX17050_VCELL, &value);
 	bool voltage_empty = value < 3200;
@@ -2191,10 +2185,7 @@ static lv_res_t _create_window_battery_status(lv_obj_t *btn)
 	s_printf(txt_buf + strlen(txt_buf), "%d mV\n", value);
 
 	max17050_get_property(MAX17050_TEMP, &value);
-	if (value >= 0)
+	s_printf(txt_buf + strlen(txt_buf), "%d.%d oC\n\n\n", value / 10, (value >= 0 ? value : (~value + 1)) % 10);
-		s_printf(txt_buf + strlen(txt_buf), "%d.%d oC\n\n\n", value / 10, value % 10);
-	else
-		s_printf(txt_buf + strlen(txt_buf), "-%d.%d oC\n\n\n", (~value + 1) / 10, (~value + 1) % 10);
 
 	value = i2c_recv_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_CID4);
 	u32 main_pmic_version = i2c_recv_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_CID3) & 0xF;

nyx/nyx_gui/gfx/gfx.c

@@ -23,6 +23,8 @@
 gfx_ctxt_t gfx_ctxt;
 gfx_con_t gfx_con;
 
+static bool gfx_con_init_done = false;
+
 static const u8 _gfx_font[] = {
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Char 032 ( )
 	0x00, 0x30, 0x30, 0x18, 0x18, 0x00, 0x0C, 0x00, // Char 033 (!)
@@ -154,6 +156,8 @@ void gfx_con_init()
 	gfx_con.fillbg = 1;
 	gfx_con.bgcol = 0xFF000000;
 	gfx_con.mute = 0;
+
+	gfx_con_init_done = true;
 }
 
 void gfx_con_setcol(u32 fgcol, int fillbg, u32 bgcol)
@@ -295,7 +299,7 @@ void gfx_putc(char c)
 
 void gfx_puts(char *s)
 {
-	if (!s || gfx_con.mute)
+	if (!s || !gfx_con_init_done || gfx_con.mute)
 		return;
 
 	for (; *s; s++)
@@ -308,10 +312,19 @@ static void _gfx_putn(u32 v, int base, char fill, int fcnt)
 	static const char digits[] = "0123456789ABCDEFghijklmnopqrstuvwxyz";
 	char *p;
 	int c = fcnt;
+	bool negative = false;
 
 	if (base > 36)
 		return;
 
+	// Account for negative numbers.
+	if (base == 10 && v & 0x80000000)
+	{
+		negative = true;
+		v = (int)v * -1;
+		c--;
+	}
+
 	p = buf + 64;
 	*p = 0;
 	do
@@ -321,9 +334,12 @@ static void _gfx_putn(u32 v, int base, char fill, int fcnt)
 		v /= base;
 	} while (v);
 
+	if (negative)
+		*--p = '-';
+
 	if (fill != 0)
 	{
-		while (c > 0)
+		while (c > 0 && p > buf)
 		{
 			*--p = fill;
 			c--;
@@ -335,7 +351,7 @@ static void _gfx_putn(u32 v, int base, char fill, int fcnt)
 
 void gfx_printf(const char *fmt, ...)
 {
-	if (gfx_con.mute)
+	if (!gfx_con_init_done || gfx_con.mute)
 		return;
 
 	va_list ap;
@@ -411,7 +427,7 @@ void gfx_printf(const char *fmt, ...)
 
 void gfx_hexdump(u32 base, const void *buf, u32 len)
 {
-	if (gfx_con.mute)
+	if (!gfx_con_init_done || gfx_con.mute)
 		return;
 
 	u8 *buff = (u8 *)buf;