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drivers/lcd/st7032.c: Improve ST7032 scroll-up to avoid line duplication

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This commit is contained in:
Alan Carvalho de Assis 2018-12-04 16:20:29 -06:00 committed by Gregory Nutt
parent 3d23c68c05
commit c629d867e0
1 changed files with 6 additions and 15 deletions
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21
drivers/lcd/st7032.c
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@ -368,6 +368,10 @@ static void lcd_scroll_up(FAR struct st7032_dev_s *priv)
return;
}
/* Clear display */
st7032_write_inst(priv, ST7032_CLEAR_DISPLAY);
for (currow = 1; currow < ST7032_MAX_ROW; ++currow)
{
priv->row = currow;
@ -843,7 +847,7 @@ static ssize_t st7032_write(FAR struct file *filep, FAR const char *buffer,
priv->row += 1;
if (priv->row >= ST7032_MAX_ROW)
{
lcd_scroll_up(priv);
priv->pendscroll = true;
priv->row = ST7032_MAX_ROW - 1;
}
@ -864,20 +868,7 @@ static ssize_t st7032_write(FAR struct file *filep, FAR const char *buffer,
}
else
{
/* All others are fair game. See if we need to wrap line. */
if (priv->col >= ST7032_MAX_COL)
{
priv->row += 1;
if (priv->row >= ST7032_MAX_ROW)
{
lcd_scroll_up(priv);
priv->row = ST7032_MAX_ROW - 1;
}
priv->col = 0;
lcd_set_curpos(priv);
}
/* Just print it! */
lcd_putdata(priv, ch);
}