uart.c

uint32_t *USART2_SR = (uint32_t *)0x40004400;
uint32_t *USART2_DR = (uint32_t *)0x40004404;
rtems_isr USART2_handler(rtems_vector_number vector)
{

    uint32_t temp = temp;
    if((*USART2_SR) & (1<<5))
    {
	    
	    //printk("into int\n");
        if(uart2_index < 100)
	        uart2_buf[uart2_index++] = (uint8_t)(*USART2_DR)&0xff;
	    else
            temp = *USART2_DR;
		//printk("%02X  ", uart2_buf[uart2_index - 1]);
		
		
		//if(uart2_index == 100)
		//    return;
        #if 0
		if(uart2_buf[uart2_index - 1] == '\n')
		{
		    uart2_rev_flag = 1;	
        }
        if(uart2_buf[uart2_index - 1] == '>')
		{
		    uart2_rev_flag = 1;
            uart2_buf[uart2_index++] = '\r';
            uart2_buf[uart2_index++] = '\n';	
        }
        #endif
		    	
	}
    if((*USART2_SR) & (1<<4))  // idle
    {
	    
        temp &= (*USART2_SR);
	    temp &= (*USART2_DR);
        temp = temp;
	    
        uart2_rev_flag = 1;	
        printk("fla");
        
		    	
	}
	if((*USART2_SR) & (1<<3))
	{
        //int temp = (*USART2_DR)&0xff;
        temp = *USART2_SR;
	    temp = *USART2_DR;
    }
    
}