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Merge branch 'master' of git://git.devl.org/git/malvira/libmc1322x into uart-upstream

Browse source 
Conflicts:
	cpu/mc1322x/lib/include/uart.h
	cpu/mc1322x/src/default_lowlevel.c
This commit is contained in:
Mariano Alvira 2011-07-08 19:21:15 -04:00
commit e2d74fa0a5
15 changed files with 367 additions and 25 deletions
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78
cpu/mc1322x/lib/uart2.c Normal file
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/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of libmc1322x: see http://mc1322x.devl.org
* for details.
*
*
*/
#include <mc1322x.h>
#include <stdint.h>
volatile char u2_tx_buf[64];
volatile uint32_t u2_head, u2_tail;
void uart2_isr(void) {
while( *UART1_UTXCON != 0 ) {
if (u2_head == u2_tail) {
disable_irq(UART2);
return;
}
*UART2_UDATA = u2_tx_buf[u2_tail];
u2_tail++;
if (u2_tail >= sizeof(u2_tx_buf))
u2_tail = 0;
}
}
void uart2_putc(char c) {
/* disable UART2 since */
/* UART2 isr modifies u2_head and u2_tail */
disable_irq(UART2);
if( (u2_head == u2_tail) &&
(*UART2_UTXCON != 0)) {
*UART2_UDATA = c;
} else {
u2_tx_buf[u2_head] = c;
u2_head += 1;
if (u2_head >= sizeof(u2_tx_buf))
u2_head = 0;
if (u2_head == u2_tail) { /* drop chars when no room */
if (u2_head) { u2_head -=1; } else { u2_head = sizeof(u2_tx_buf); }
}
enable_irq(UART1);
}
}
uint8_t uart2_getc(void) {
while(uart2_can_get() == 0) { continue; }
return *UART2_UDATA;
}