| getc.c (157940) | getc.c (168013) |
|---|---|
| 1/*- 2 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 17 unchanged lines hidden (view full) --- 26 * 27 * No warranty, expressed or implied, is included with this software. It is 28 * provided "AS IS" and no warranty of any kind including statutory or aspects 29 * relating to merchantability or fitness for any purpose is provided. All 30 * intellectual property rights of others is maintained with the respective 31 * owners. This software is not copyrighted and is intended for reference 32 * only. 33 * | 1/*- 2 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. --- 17 unchanged lines hidden (view full) --- 26 * 27 * No warranty, expressed or implied, is included with this software. It is 28 * provided "AS IS" and no warranty of any kind including statutory or aspects 29 * relating to merchantability or fitness for any purpose is provided. All 30 * intellectual property rights of others is maintained with the respective 31 * owners. This software is not copyrighted and is intended for reference 32 * only. 33 * |
| 34 * $FreeBSD: head/sys/boot/arm/at91/libat91/getc.c 157940 2006-04-21 13:58:51Z imp $ | 34 * $FreeBSD: head/sys/boot/arm/at91/libat91/getc.c 168013 2007-03-28 22:40:37Z imp $ |
| 35 */ 36 37#include "at91rm9200.h" 38#include "at91rm9200_lowlevel.h" 39#include "lib.h" 40 41/* 42 * int getc(int seconds) 43 * 44 * Reads a character from the DBGU port, if one is available within about 45 * seconds seconds. It assumes that DBGU has already been initialized. 46 */ 47int 48getc(int seconds) 49{ 50 AT91PS_USART pUSART = (AT91PS_USART)AT91C_BASE_DBGU; 51 unsigned thisSecond; 52 | 35 */ 36 37#include "at91rm9200.h" 38#include "at91rm9200_lowlevel.h" 39#include "lib.h" 40 41/* 42 * int getc(int seconds) 43 * 44 * Reads a character from the DBGU port, if one is available within about 45 * seconds seconds. It assumes that DBGU has already been initialized. 46 */ 47int 48getc(int seconds) 49{ 50 AT91PS_USART pUSART = (AT91PS_USART)AT91C_BASE_DBGU; 51 unsigned thisSecond; 52 |
| 53 // Clamp to 20s 54 if (seconds > 20) 55 seconds = 20; |
|
| 53 thisSecond = GetSeconds(); 54 seconds = thisSecond + seconds; | 56 thisSecond = GetSeconds(); 57 seconds = thisSecond + seconds; |
| 55 | |
| 56 do { 57 if ((pUSART->US_CSR & AT91C_US_RXRDY)) 58 return (pUSART->US_RHR & 0xFF); 59 thisSecond = GetSeconds(); | 58 do { 59 if ((pUSART->US_CSR & AT91C_US_RXRDY)) 60 return (pUSART->US_RHR & 0xFF); 61 thisSecond = GetSeconds(); |
| 60 } while (thisSecond < seconds); | 62 } while (thisSecond != seconds); |
| 61 return (-1); 62} | 63 return (-1); 64} |