+++ /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_setconf.c,v 1.1.2.3 2009-01-03 16:24:50 zer0 Exp $
- *
- */
-
-/* Olivier MATZ, Droids-corp 2004 - 2009 */
-
-#include <uart.h>
-#include <uart_defs.h>
-#include <uart_private.h>
-
-/** The emission fifo of uart */
-#ifdef UART0_COMPILE
-char g_tx0_buf[UART0_TX_FIFO_SIZE];
-char g_rx0_buf[UART0_RX_FIFO_SIZE];
-#endif
-#ifdef UART1_COMPILE
-char g_tx1_buf[UART1_TX_FIFO_SIZE];
-char g_rx1_buf[UART1_RX_FIFO_SIZE];
-#endif
-#ifdef UART2_COMPILE
-char g_tx2_buf[UART2_TX_FIFO_SIZE];
-char g_rx2_buf[UART2_RX_FIFO_SIZE];
-#endif
-#ifdef UART3_COMPILE
-char g_tx3_buf[UART3_TX_FIFO_SIZE];
-char g_rx3_buf[UART3_RX_FIFO_SIZE];
-#endif
-
-#if UART_IS_USART
-
-static int8_t uart_set_nbits_parity(uint8_t num, struct uart_config * u)
-{
- uint8_t ucsrc = 0;
-
- /* number of bit in the frame */
-#ifdef CONFIG_MODULE_UART_9BITS
- if (u->nbits < 5 || u->nbits > 9) {
- return ENOTSUP;
- }
-#else
- if (u->nbits < 5 || u->nbits > 8) {
- return ENOTSUP;
- }
-#endif
-
- ucsrc |= ( ((u->nbits - 5) & 0x03) << UCSZ0 );
-#ifdef CONFIG_MODULE_UART_9BITS
- if (u->nbits == 9)
- *uart_regs[num].ucsrb |= (1 << UCSZ2);
- else
-#endif
- *uart_regs[num].ucsrb &= ~(1 << UCSZ2);
-
- /* parity */
- if (u->parity == UART_PARTITY_ODD)
- ucsrc |= ((1 << UPM0) | (1 << UPM1));
- else if (u->parity == UART_PARTITY_EVEN)
- ucsrc |= (1 << UPM1);
- else if (u->parity != UART_PARTITY_NONE) {
- return EINVAL;
- }
-
- /* nb of stop bits */
- if (u->stop_bits == UART_STOP_BITS_2)
- ucsrc |= (1 << USBS);
- else if (u->stop_bits != UART_STOP_BITS_1)
- return EINVAL;
-
-#ifdef URSEL
- /* some uC use a special bit URSEL to access to UCSRC */
- ucsrc |= (1<<URSEL);
-#endif
- *uart_regs[num].ucsrc = ucsrc;
-
- return ESUCCESS;
-}
-
-#else /* UART_IS_USART */
-
-static int8_t uart_set_nbits_parity(int8_t num, struct uart_config * u)
-{
- /* number of bit in the frame */
- if (u->nbits == 8)
- *uart_regs[num].ucsrb &= ~(1 << CHR9);
-#ifdef CONFIG_MODULE_UART_9BITS
- else if (u->nbits == 9)
- *uart_regs[num].ucsrb |= (1 << CHR9);
-#endif
- else
- return ENOTSUP;
-
- /* parity and stop */
- if (u->parity != UART_PARTITY_NONE ||
- u->stop_bits != UART_STOP_BITS_1) {
- return ENOTSUP;
- }
-
- return ESUCCESS;
-}
-#endif /* UART_IS_USART */
-
-
-#if UART_IS_USART
-
-static int8_t uart_set_baudreg(uint8_t num, uint16_t baudreg)
-{
- uint8_t lo, hi;
-
- /* set msb bit of hi to 0 (useful fot uC with URSEL, and not
- * important for the others because the baudreg will never be
- * as big */
- lo = (uint8_t)baudreg;
- hi = (uint8_t)(baudreg>>8) & 0x7F;
-
- *uart_regs[num].ubrrl = lo;
- *uart_regs[num].ubrrh = hi;
-
- return ESUCCESS;
-}
-
-#else /* UART_IS_USART */
-
-static int8_t uart_set_baudreg(uint8_t num, uint16_t baudreg)
-{
- uint8_t lo, hi;
-
- lo=(uint8_t)baudreg;
- hi=(uint8_t)(baudreg>>8);
-
- if (hi != 0)
- return EINVAL;
- *uart_regs[num].ubrrl = lo;
-
- return ESUCCESS;
-}
-#endif /* UART_IS_USART */
-
-/* configuration from uart_config.h */
-#define UART_SET_STATICCONF(x) \
- u->enabled = UART##x##_ENABLED; \
- u->intr_enabled = UART##x##_INTERRUPT_ENABLED; \
- u->use_double_speed = UART##x##_USE_DOUBLE_SPEED; \
- u->parity = UART##x##_PARITY; \
- u->stop_bits = UART##x##_STOP_BIT; \
- u->nbits = UART##x##_NBITS; \
- u->baudrate = UART##x##_BAUDRATE; \
- break
-
-int8_t uart_setconf(uint8_t num, struct uart_config *u)
-{
- uint8_t ret = ESUCCESS;
- uint16_t baudrate_reg;
- struct uart_config static_conf;
- uint8_t flags;
-
- IRQ_LOCK(flags);
-
- /* static configuration */
- if (!u) {
- u = &static_conf;
- switch (num) {
-#ifdef UART0_COMPILE
- case 0:
- UART_SET_STATICCONF(0);
-#endif
-#ifdef UART1_COMPILE
- case 1:
- UART_SET_STATICCONF(1);
-#endif
-#ifdef UART2_COMPILE
- case 2:
- UART_SET_STATICCONF(2);
-#endif
-#ifdef UART3_COMPILE
- case 3:
- UART_SET_STATICCONF(3);
-#endif
- default:
- ret = EINVAL;
- goto out;
- }
- }
-
- /* wait xmit finished (UDRE = 1) */
- while( !(*uart_regs[num].ucsra & (1<<UDRE)) );
-
- switch (num) {
-#ifdef UART0_COMPILE
- case 0:
- cirbuf_init(&g_tx_fifo[0], g_tx0_buf, 0, UART0_TX_FIFO_SIZE);
- cirbuf_init(&g_rx_fifo[0], g_rx0_buf, 0, UART0_RX_FIFO_SIZE);
- break;
-#endif
-#ifdef UART1_COMPILE
- case 1:
- cirbuf_init(&g_tx_fifo[1], g_tx1_buf, 0, UART1_TX_FIFO_SIZE);
- cirbuf_init(&g_rx_fifo[1], g_rx1_buf, 0, UART1_RX_FIFO_SIZE);
- break;
-#endif
-#ifdef UART2_COMPILE
- case 2:
- cirbuf_init(&g_tx_fifo[2], g_tx2_buf, 0, UART2_TX_FIFO_SIZE);
- cirbuf_init(&g_rx_fifo[2], g_rx2_buf, 0, UART2_RX_FIFO_SIZE);
- break;
-#endif
-#ifdef UART3_COMPILE
- case 3:
- cirbuf_init(&g_tx_fifo[3], g_tx3_buf, 0, UART3_TX_FIFO_SIZE);
- cirbuf_init(&g_rx_fifo[3], g_rx3_buf, 0, UART3_RX_FIFO_SIZE);
- break;
-#endif
- default:
- ret = EINVAL;
- goto out;
- }
- *uart_regs[num].ucsra = 0;
-
- if (u->enabled)
- *uart_regs[num].ucsrb = ((1 << TXEN) | (1 << RXEN));
- else {
- *uart_regs[num].ucsrb = 0;
- goto out; /* no more conf */
- }
-
- /* we only enable recv interrupt, the xmit intrpt will be
- * enabled in the xmit function */
- if (u->intr_enabled)
- *uart_regs[num].ucsrb |= (1 << RXCIE);
-
- if (UART_HAS_U2X) { /* if u2x is supported */
- if (u->use_double_speed) /* u2x is enabled */
- *uart_regs[num].ucsra |= (1 << U2X);
- else
- *uart_regs[num].ucsra &= ~(1 << U2X);
- }
- else if (u->use_double_speed) {
- ret = ENOTSUP;
- goto out;
- }
-
- uart_set_nbits_parity(num, u);
-
- /* baudrate */
- if(u->use_double_speed)
- baudrate_reg = (F_CPU / (u->baudrate*8l)) - 1;
- else
- baudrate_reg = (F_CPU / (u->baudrate*16l)) - 1;
-
- uart_set_baudreg(num, baudrate_reg);
-
- /* exit */
- out:
- IRQ_UNLOCK(flags);
- return ret;
-}
git.droids-corp.org / protos / xbee-avr.git / blobdiff