+++ /dev/null
-/*
- * Copyright Droids Corporation, Microb Technology, Eirbot (2005)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Revision : $Id: uart.c,v 1.33.4.7 2009-01-23 23:08:42 zer0 Exp $
- *
- */
-
-/* Olivier MATZ, Droids-corp 2004 - 2009 */
-
-#include <aversive.h>
-#include <aversive/list.h>
-
-#include <uart.h>
-#include <uart_defs.h>
-#include <uart_private.h>
-
-struct cirbuf g_tx_fifo[UART_HW_NUM];
-struct cirbuf g_rx_fifo[UART_HW_NUM];
-
-/* global vars are initialized to 0 (NULL) */
-event *rx_event[UART_HW_NUM];
-event *tx_event[UART_HW_NUM];
-
-const struct regs uart_regs[UART_HW_NUM] = {
-#ifdef UDR0
- {
- .udr = &UDR0,
- .ucsra = &UCSR0A,
- .ucsrb = &UCSR0B,
- .ucsrc = &UCSR0C,
- .ubrrl = &UBRR0L,
- .ubrrh = &UBRR0H,
- },
-#endif
-#ifdef UDR1
- {
- .udr = &UDR1,
- .ucsra = &UCSR1A,
- .ucsrb = &UCSR1B,
- .ucsrc = &UCSR1C,
- .ubrrl = &UBRR1L,
- .ubrrh = &UBRR1H,
- },
-#endif
-#ifdef UDR2
- {
- .udr = &UDR2,
- .ucsra = &UCSR2A,
- .ucsrb = &UCSR2B,
- .ucsrc = &UCSR2C,
- .ubrrl = &UBRR2L,
- .ubrrh = &UBRR2H,
- },
-#endif
-#ifdef UDR3
- {
- .udr = &UDR3,
- .ucsra = &UCSR3A,
- .ucsrb = &UCSR3B,
- .ucsrc = &UCSR3C,
- .ubrrl = &UBRR3L,
- .ubrrh = &UBRR3H,
- },
-#endif
-};
-
-/**
- * This is the interruption function which occurs when the entire
- * frame in the transmit shift register has been shifted out and
- * there is no new data in the transmit buffer.
- */
-#ifdef UART0_COMPILE
-#ifndef SIG_UART0_DATA
-#define SIG_UART0_DATA USART0_UDRE_vect
-#endif
-#ifndef SIG_UART0_DATA
-#define SIG_UART0_DATA SIG_USART0_DATA
-#endif
-SIGNAL(SIG_UART0_DATA)
-{
- uart_send_next_char(0);
-}
-#endif
-#ifdef UART1_COMPILE
-#ifndef SIG_UART1_DATA
-#define SIG_UART1_DATA USART1_UDRE_vect
-#endif
-#ifndef SIG_UART1_DATA
-#define SIG_UART1_DATA SIG_USART1_DATA
-#endif
-SIGNAL(SIG_UART1_DATA)
-{
- uart_send_next_char(1);
-}
-#endif
-#ifdef UART2_COMPILE
-#ifndef SIG_UART2_DATA
-#define SIG_UART2_DATA USART2_UDRE_vect
-#endif
-#ifndef SIG_UART2_DATA
-#define SIG_UART2_DATA SIG_USART2_DATA
-#endif
-SIGNAL(SIG_UART2_DATA)
-{
- uart_send_next_char(2);
-}
-#endif
-#ifdef UART3_COMPILE
-#ifndef SIG_UART3_DATA
-#define SIG_UART3_DATA USART3_UDRE_vect
-#endif
-#ifndef SIG_UART3_DATA
-#define SIG_UART3_DATA SIG_USART3_DATA
-#endif
-SIGNAL(SIG_UART3_DATA)
-{
- uart_send_next_char(3);
-}
-#endif
-
-static void uart_recv_next_char(uint8_t num);
-
-/**
- * This is the interruption function which occurs when there is
- * a new unread data in the reception buffer.
- */
-#ifdef UART0_COMPILE
-#ifndef SIG_UART0_RECV
-#define SIG_UART0_RECV USART0_RX_vect
-#endif
-#ifndef SIG_UART0_RECV
-#define SIG_UART0_RECV SIG_USART0_RECV
-#endif
-SIGNAL(SIG_UART0_RECV)
-{
- uart_recv_next_char(0);
-}
-#endif
-#ifdef UART1_COMPILE
-#ifndef SIG_UART1_RECV
-#define SIG_UART1_RECV USART1_RX_vect
-#endif
-#ifndef SIG_UART1_RECV
-#define SIG_UART1_RECV SIG_USART1_RECV
-#endif
-SIGNAL(SIG_UART1_RECV)
-{
- uart_recv_next_char(1);
-}
-#endif
-#ifdef UART2_COMPILE
-#ifndef SIG_UART2_RECV
-#define SIG_UART2_RECV USART2_RX_vect
-#endif
-#ifndef SIG_UART2_RECV
-#define SIG_UART2_RECV SIG_USART2_RECV
-#endif
-SIGNAL(SIG_UART2_RECV)
-{
- uart_recv_next_char(2);
-}
-#endif
-#ifdef UART3_COMPILE
-#ifndef SIG_UART3_RECV
-#define SIG_UART3_RECV USART3_RX_vect
-#endif
-#ifndef SIG_UART3_RECV
-#define SIG_UART3_RECV SIG_USART3_RECV
-#endif
-SIGNAL(SIG_UART3_RECV)
-{
- uart_recv_next_char(3);
-}
-#endif
-
-
-/**
- * transmit next character of fifo if any, and call the event function.
- * This function is executed with intr locked.
- */
-void uart_send_next_char(uint8_t num)
-{
-#ifdef CONFIG_MODULE_UART_9BITS
- if (uart_getconf_nbits(num) == 9) {
- int elt = 0;
-
- /* for 9 bits, it uses 2 places in the fifo */
- if (CIRBUF_GET_LEN(&g_tx_fifo[num]) < 2) {
- cbi(*uart_regs[num].ucsrb, UDRIE);
- return;
- }
-
- cirbuf_get_buf_tail(&g_tx_fifo[num], (char *)&elt, 2);
- cirbuf_del_buf_tail(&g_tx_fifo[num], 2);
-
- uart_set_udr_9bits(num, elt);
- sbi(*uart_regs[num].ucsrb, UDRIE);
- }
- else /* 5, 6, 7 or 8 bits */
-#endif /* CONFIG_MODULE_UART_9BITS */
- {
- char elt = 0;
-
- if (CIRBUF_IS_EMPTY(&g_tx_fifo[num])) {
- cbi(*uart_regs[num].ucsrb, UDRIE);
- return;
- }
-
- elt = cirbuf_get_tail(&g_tx_fifo[num]);
- cirbuf_del_tail(&g_tx_fifo[num]);
- uart_set_udr(num, elt);
- sbi(*uart_regs[num].ucsrb, UDRIE);
- }
-}
-
-/**
- * UART RX Interrupt
- */
-static void uart_recv_next_char(uint8_t num)
-{
-#ifdef CONFIG_MODULE_UART_9BITS
- if (uart_getconf_nbits() == 9) {
- int elt = 0;
-
- elt = uart_get_udr_9bits(num);
- if (CIRBUF_GET_FREELEN(&g_rx_fifo[num]) >= 2) {
- cirbuf_add_buf_head(&g_rx_fifo[num], (char *)&elt, 2);
- }
-
- if (rx_event[num])
- ((event_9bits *)rx_event[num])(elt);
- }
- else
-#endif /* CONFIG_MODULE_UART_9BITS */
- {
- char elt = 0;
-
- elt = uart_get_udr(num);
- if (!CIRBUF_IS_FULL(&g_rx_fifo[num])) {
- cirbuf_add_head(&g_rx_fifo[num], elt);
- }
-
- if (rx_event[num])
- rx_event[num](elt);
- }
-}
-
-/* init all uarts */
-void uart_init(void)
-{
-#if (defined UDR0) && (defined UART0_COMPILE)
- uart_setconf(0, NULL);
-#endif
-
-#if (defined UDR1) && (defined UART1_COMPILE)
- uart_setconf(1, NULL);
-#endif
-
-#if (defined UDR2) && (defined UART2_COMPILE)
- uart_setconf(2, NULL);
-#endif
-
-#if (defined UDR3) && (defined UART3_COMPILE)
- uart_setconf(3, NULL);
-#endif
-}
git.droids-corp.org / protos / xbee-avr.git / blobdiff