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authordemonchy2006-04-24 18:52:02 +0000
committerdemonchy2006-04-24 18:52:02 +0000
commit34642177374d29f0cb4e180dc43a4ba297f2a53b (patch)
tree2063db11b2543869de1954350f021adaddb715a3 /n/avr/modules/twi/slave/twi_slave.c
parent2c9b471e080e1fb7c5a7727512b918b0b827e026 (diff)
Ajout de la nouvelle version du module
(fichier source commun pour le master et le slave)
Diffstat (limited to 'n/avr/modules/twi/slave/twi_slave.c')
-rw-r--r--n/avr/modules/twi/slave/twi_slave.c151
1 files changed, 0 insertions, 151 deletions
diff --git a/n/avr/modules/twi/slave/twi_slave.c b/n/avr/modules/twi/slave/twi_slave.c
deleted file mode 100644
index 58e777e..0000000
--- a/n/avr/modules/twi/slave/twi_slave.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/* twi_slave.c */
-/* avr.twi.slave - TWI slave module. {{{
- *
- * Copyright (C) 2005 Clément Demonchy
- *
- * Robot APB Team/Efrei 2006.
- * Web: http://assos.efrei.fr/robot/
- * Email: robot AT efrei DOT fr
- *
- * 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.
- *
- * }}} */
-#include "common.h"
-#include "twi_slave.h"
-
-#include "io.h"
-
-#include <compat/twi.h>
-
-static volatile uint8_t twi_rcpt_tail;
-static volatile uint8_t send_idx;
-static volatile uint8_t data_ready;
-static volatile uint8_t buf_rcpt[AC_TWI_SLAVE_RCPT_BUF_SIZE];
-static volatile uint8_t buf_send1[AC_TWI_SLAVE_SEND_BUF_SIZE];
-static volatile uint8_t buf_send2[AC_TWI_SLAVE_SEND_BUF_SIZE];
-static volatile uint8_t *buf_send_sys, *buf_send_user;
-static volatile int8_t send_switch;
-static volatile int8_t update;
-
-#if 0
-#define TWI_DEBUG(x) uart0_putc (x)
-#else
-#define TWI_DEBUG(x)
-#endif
-
-void
-twi_init (uint8_t addr)
-{
- send_switch = 0;
- update = 0;
- buf_send_sys = buf_send1;
- buf_send_user = buf_send2;
- TWAR = addr;
- TWSR = 0x00;
- TWCR = _BV(TWEA) | _BV(TWEN) | _BV(TWIE);
-}
-
-
-SIGNAL (SIG_2WIRE_SERIAL)
-{
- TWI_DEBUG (';');
- switch (TW_STATUS)
- {
- /* slave transmitter mode */
- /* START + SLA|W + ACK */
- case TW_ST_SLA_ACK:
- case TW_ST_ARB_LOST_SLA_ACK:
- TWI_DEBUG ('a');
- if (send_switch && !update)
- {
- volatile uint8_t *tmp = buf_send_sys;
- buf_send_sys = buf_send_user;
- buf_send_user = tmp;
- send_switch = 0;
- }
- send_idx = 0;
- /* no break */
- case TW_ST_DATA_ACK:
- TWI_DEBUG ('b');
- TWDR = buf_send_sys[send_idx++];
- if (AC_TWI_SLAVE_SEND_BUF_SIZE == send_idx)
- TWCR &= ~_BV(TWEA);
- break;
- case TW_ST_DATA_NACK:
- case TW_ST_LAST_DATA:
- TWI_DEBUG ('c');
- TWCR |= _BV (TWEA);
- break;
- /* slave receiver mode */
- /* START + SLA|W + ACK */
- case TW_SR_SLA_ACK:
- case TW_SR_ARB_LOST_SLA_ACK:
- case TW_SR_GCALL_ACK:
- case TW_SR_ARB_LOST_GCALL_ACK:
- TWI_DEBUG ('z');
- data_ready = 0;
- twi_rcpt_tail = 0;
- if (AC_TWI_SLAVE_RCPT_BUF_SIZE == 1)
- TWCR &= ~_BV(TWEA);
- break;
- /* DATA + ACK */
- case TW_SR_DATA_ACK:
- case TW_SR_GCALL_DATA_ACK:
- TWI_DEBUG ('y');
- buf_rcpt[twi_rcpt_tail++] = TWDR;
- if (AC_TWI_SLAVE_RCPT_BUF_SIZE - twi_rcpt_tail == 1)
- TWCR &= ~_BV(TWEA);
- break;
- /* DATA + NACK */
- case TW_SR_DATA_NACK:
- case TW_SR_GCALL_DATA_NACK:
- TWI_DEBUG ('x');
- buf_rcpt[twi_rcpt_tail++] = TWDR;
- /* no break */
- /* STOP */
- case TW_SR_STOP:
- TWI_DEBUG ('w');
- data_ready = 1;
- break;
- }
- TWCR |= _BV(TWINT);
-}
-
-/** Recopie les données recues dans buf. */
-uint8_t
-twi_poll (uint8_t buf[], uint8_t size)
-{
- if (data_ready)
- {
- data_ready = 0;
- while (size --)
- buf[size] = buf_rcpt[size];
- TWCR |= _BV (TWEA);
- return 1;
- }
- else
- return 0;
-}
-
-void
-twi_update (uint8_t buf[], uint8_t size)
-{
- update = 1;
- send_switch = 1;
- while (size --)
- buf_send_user[size] = buf[size];
- update = 0;
-}
-