Exemplos de lcd_read_data em C++ (Cpp)

Exemplo n.º 1

Arquivo: cobalt_lcdfb.c Projeto: AshishNamdev/linux

static ssize_t cobalt_lcdfb_read(struct fb_info *info, char __user *buf,
				 size_t count, loff_t *ppos)
{
	char src[LCD_CHARS_MAX];
	unsigned long pos;
	int len, retval = 0;

	pos = *ppos;
	if (pos >= LCD_CHARS_MAX || count == 0)
		return 0;

	if (count > LCD_CHARS_MAX)
		count = LCD_CHARS_MAX;

	if (pos + count > LCD_CHARS_MAX)
		count = LCD_CHARS_MAX - pos;

	for (len = 0; len < count; len++) {
		retval = lcd_busy_wait(info);
		if (retval < 0)
			break;

		lcd_write_control(info, LCD_TEXT_POS(pos));

		retval = lcd_busy_wait(info);
		if (retval < 0)
			break;

		src[len] = lcd_read_data(info);
		if (pos == 0x0f)
			pos = 0x40;
		else
			pos++;
	}

	if (retval < 0 && signal_pending(current))
		return -ERESTARTSYS;

	if (copy_to_user(buf, src, len))
		return -EFAULT;

	*ppos += len;

	return len;
}

Exemplo n.º 2

Arquivo: lcd.c Projeto: bluelife85/GermWarfare

__INLINE uint16_t lcd_read_reg(uint16_t reg){
	
	lcd_write_index(reg);
	
	return lcd_read_data();
}