summaryrefslogtreecommitdiff
path: root/n/avr/twi-slave
diff options
context:
space:
mode:
authordemonchy2005-03-29 18:26:54 +0000
committerdemonchy2005-03-29 18:26:54 +0000
commitc602781645a70d01b104225bde9d7491e27700c8 (patch)
tree6861566a30a4fa0c2a6dc3701c74d8b01a2d01fc /n/avr/twi-slave
parent6d40a5d17f21ecac61d8b41e030cac2560b87511 (diff)
Initial revision
Diffstat (limited to 'n/avr/twi-slave')
-rw-r--r--n/avr/twi-slave/Makefile18
-rw-r--r--n/avr/twi-slave/Makefile.avr114
-rw-r--r--n/avr/twi-slave/avrconfig.h7
-rw-r--r--n/avr/twi-slave/test_twi_slave.c53
-rw-r--r--n/avr/twi-slave/testconfig.h62
-rw-r--r--n/avr/twi-slave/twi_slave.c130
-rw-r--r--n/avr/twi-slave/twi_slave.h38
7 files changed, 422 insertions, 0 deletions
diff --git a/n/avr/twi-slave/Makefile b/n/avr/twi-slave/Makefile
new file mode 100644
index 0000000..82de367
--- /dev/null
+++ b/n/avr/twi-slave/Makefile
@@ -0,0 +1,18 @@
+PROGS = test_twi_slave
+test_twi_slave_OBJECTS = test_twi_slave.o twi_slave.o rs232.o
+DOC = twi_slave.html
+EXTRACTDOC = avrconfig.h twi_slave.h
+MODULES = n/avr/rs232
+CONFIGFILE = testconfig.h
+# atmega8, atmega8535, atmega128...
+MCU_TARGET = atmega8
+# -O2 : speed
+# -Os : size
+OPTIMIZE = -O2
+
+DEFS =
+LIBS =
+
+include Makefile.avr
+
+test_twi_slave.elf: $(test_twi_slave_OBJECTS)
diff --git a/n/avr/twi-slave/Makefile.avr b/n/avr/twi-slave/Makefile.avr
new file mode 100644
index 0000000..c010642
--- /dev/null
+++ b/n/avr/twi-slave/Makefile.avr
@@ -0,0 +1,114 @@
+# Flags. {{{1
+
+CFLAGS = -g -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET)
+CPPFLAGS = $(DEFS) -MMD $(INCLUDES) \
+ $(if $(CONFIGFILE), $(CONFIGFILE:%=-include %))
+INCLUDES = -Imodules
+LDFLAGS = $(CFLAGS)
+
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+
+# Main rules. {{{1
+
+all: elf lst hex
+
+.PHONY: all clean elf lst doc text hex srec bin eeprom ehex esrec ebin
+
+# Rules for modules. {{{1
+
+VPATH = $(MODULES:%=modules/%)
+
+modules_checkout: modules_co
+
+modules_co: $(MODULES:%=modules_co.%)
+
+$(MODULES:%=modules_co.%):
+ mkdir -p modules
+ cd modules && cvs co $(@:modules_co.%=%)
+
+modules_update: modules_up
+
+modules_up: $(MODULES:%=modules_up.%)
+
+$(MODULES:%=modules_up.%):
+ cd modules/$(@:modules_up.%=%) && cvs up
+
+# General rules. {{{1
+
+ELFS = $(PROGS:%=%.elf)
+OBJECTS = $(filter %.o,$(foreach prog,$(PROGS),$($(prog)_OBJECTS)))
+
+elf: $(ELFS)
+lst: $(PROGS:%=%.lst)
+
+# Great piece of rules which only works in make 3.80+.
+# define PROG_template
+# $(1).elf: $$($(1)_OBJECTS)
+# endef
+#
+# $(foreach prog,$(PROGS),$(eval $(call PROG_template,$(prog))))
+
+$(ELFS):
+ $(LINK.o) $^ $(LDLIBS) -o $@
+
+%.lst: %.elf
+ $(OBJDUMP) -h -S $< > $@
+
+# Dependency checking.
+-include $(OBJECTS:%.o=%.d)
+
+clean:
+ rm -f *.o *.d $(ELFS) *.lst *.map *.bak *~
+ rm -f $(DOC) *.exd $(EXTRA_CLEAN_FILES) $(TEXTS) $(EEPROMS)
+
+# Rules for building the doc. {{{1
+
+doc: $(DOC)
+
+%.html: %.txt %.exd
+ aft $<
+
+%.exd: $(EXTRACTDOC)
+ test -n "$^" && extractdoc $^ > $@ || true
+
+# Rules for building the .text rom images. {{{1
+
+TEXTS = $(PROGS:%=%.hex) $(PROGS:%=%.bin) $(PROGS:%=%.srec)
+
+text: hex bin srec
+
+hex: $(PROGS:%=%.hex)
+bin: $(PROGS:%=%.bin)
+srec: $(PROGS:%=%.srec)
+
+%.hex: %.elf
+ $(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+%.srec: %.elf
+ $(OBJCOPY) -j .text -j .data -O srec $< $@
+
+%.bin: %.elf
+ $(OBJCOPY) -j .text -j .data -O binary $< $@
+
+# Rules for building the .eeprom rom images. {{{1
+
+EEPROMS = $(PROGS:%=%_eeprom.hex) $(PROGS:%=%_eeprom.bin) \
+ $(PROGS:%=%_eeprom.srec)
+
+eeprom: ehex ebin esrec
+
+ehex: $(PROGS:%=%_eeprom.hex)
+ebin: $(PROGS:%=%_eeprom.bin)
+esrec: $(PROGS:%=%_eeprom.srec)
+
+%_eeprom.hex: %.elf
+ $(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@
+
+%_eeprom.srec: %.elf
+ $(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O srec $< $@
+
+%_eeprom.bin: %.elf
+ $(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $< $@
+
diff --git a/n/avr/twi-slave/avrconfig.h b/n/avr/twi-slave/avrconfig.h
new file mode 100644
index 0000000..5933837
--- /dev/null
+++ b/n/avr/twi-slave/avrconfig.h
@@ -0,0 +1,7 @@
+#ifndef avrconfig_h
+#define avrconfig_h
+
+#define SIZE_BUF_RCPT 1
+#define SIZE_BUF_SEND 1
+
+#endif /* avrconfig_h */
diff --git a/n/avr/twi-slave/test_twi_slave.c b/n/avr/twi-slave/test_twi_slave.c
new file mode 100644
index 0000000..2481670
--- /dev/null
+++ b/n/avr/twi-slave/test_twi_slave.c
@@ -0,0 +1,53 @@
+/* test_twi.c */
+/* n.avr.twi - AVR TWI Module. {{{
+ *
+ * Copyright (C) 2004 Clément Demonchy
+ *
+ * Robot APB Team/Efrei 2005.
+ * 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 "twi_slave.h"
+
+#include <n/avr/rs232/rs232.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+int
+main (void)
+{
+ uint8_t data[SIZE_BUF_RCPT];
+ rs232_init ();
+ sei ();
+ twi_init (0x02);
+ rs232_putc ('s');
+ rs232_putc ('s');
+ rs232_putc ('s');
+ rs232_putc ('\n');
+ data[0] = 0;
+ while (42)
+ {
+ if (twi_poll (data, SIZE_BUF_RCPT))
+ {
+ rs232_putc ('r');
+ twi_update (data, SIZE_BUF_SEND);
+ }
+ }
+
+ return 0;
+}
diff --git a/n/avr/twi-slave/testconfig.h b/n/avr/twi-slave/testconfig.h
new file mode 100644
index 0000000..f22bb0f
--- /dev/null
+++ b/n/avr/twi-slave/testconfig.h
@@ -0,0 +1,62 @@
+#ifndef testconfig_h
+#define testconfig_h
+/* avrconfig.h - config file for avr projects. */
+/* n.avr.proto - Protocol Module. {{{
+ *
+ * Copyright (C) 2004 Nicolas Schodet
+ *
+ * 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.
+ *
+ * Contact :
+ * Web: http://perso.efrei.fr/~schodet/
+ * Email: <contact@ni.fr.eu.org>
+ * }}} */
+
+#include "avrconfig.h"
+
+/* proto - Protocol module. */
+/** Maximum argument number. */
+#define AC_PROTO_ARGS_MAX_SIZE 3
+/** Protocol arguments type. */
+#define AC_PROTO_CALLBACK proto_callback
+#define AC_PROTO_PUTC rs232_putc
+
+/* global */
+/** AVR Frequency : 1000000, 1843200, 2000000, 3686400, 4000000, 7372800,
+ * 8000000, 11059200, 14745600, 16000000, 18432000, 20000000. */
+#define AC_FREQ 14745600
+
+/* rs232 - RS232 Module. */
+/** Baudrate : 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 76800,
+ * 115200, 230400, 250000, 500000, 1000000. */
+#define AC_RS232_BAUDRATE 115200
+/** Send mode :
+ * - POLLING : no interrupts;
+ * - RING : interrupts, ring buffer. */
+#define AC_RS232_SEND_MODE POLLING
+/** Recv mode, same as send mode. */
+#define AC_RS232_RECV_MODE POLLING
+/** Character size : 5, 6, 7, 8, 9 (only 8 implemented). */
+#define AC_RS232_CHAR_SIZE 8
+/** Parity : ODD, EVEN, NONE. */
+#define AC_RS232_PARITY EVEN
+/** Stop bits : 1, 2. */
+#define AC_RS232_STOP_BITS 1
+/** Send buffer size, should be power of 2 for RING mode. */
+#define AC_RS232_SEND_BUFFER_SIZE 32
+/** Recv buffer size, should be power of 2 for RING mode. */
+#define AC_RS232_RECV_BUFFER_SIZE 32
+
+#endif /* testconfig_h */
diff --git a/n/avr/twi-slave/twi_slave.c b/n/avr/twi-slave/twi_slave.c
new file mode 100644
index 0000000..9746120
--- /dev/null
+++ b/n/avr/twi-slave/twi_slave.c
@@ -0,0 +1,130 @@
+/* twi.c */
+/* n.avr.twi - AVR TWI Module. {{{
+ *
+ * Copyright (C) 2004 Clément Demonchy
+ *
+ * Robot APB Team/Efrei 2005.
+ * 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 "twi_slave.h"
+#include "n/avr/rs232/rs232.h"
+
+#include <avr/io.h>
+#include <avr/twi.h>
+#include <avr/signal.h>
+
+//TODO acces exclusif au buffer
+
+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[SIZE_BUF_RCPT];
+static volatile uint8_t buf_send[SIZE_BUF_SEND];
+
+void
+twi_init (uint8_t addr)
+{
+ TWAR = addr;
+ TWSR = 0x00;
+ TWCR = _BV(TWEA) | _BV(TWEN) | _BV(TWIE);
+}
+
+
+SIGNAL (SIG_2WIRE_SERIAL)
+{
+ rs232_putc (';');
+ switch (TW_STATUS)
+ {
+ /* slave transmitter mode */
+ /* START + SLA|W + ACK */
+ case TW_ST_SLA_ACK:
+ case TW_ST_ARB_LOST_SLA_ACK:
+ rs232_putc ('a');
+ send_idx = 0;
+ /* no break */
+ case TW_ST_DATA_ACK:
+ rs232_putc ('b');
+ TWDR = buf_send[send_idx++];
+ if (SIZE_BUF_SEND - send_idx == 1)
+ TWCR &= ~_BV(TWEA);
+ break;
+ case TW_ST_DATA_NACK:
+ case TW_ST_LAST_DATA:
+ rs232_putc ('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:
+ rs232_putc ('z');
+ data_ready = 0;
+ twi_rcpt_tail = 0;
+ if (SIZE_BUF_RCPT == 1)
+ TWCR &= ~_BV(TWEA);
+ break;
+ /* DATA + ACK */
+ case TW_SR_DATA_ACK:
+ case TW_SR_GCALL_DATA_ACK:
+ rs232_putc ('y');
+ buf_rcpt[twi_rcpt_tail++] = TWDR;
+ if (SIZE_BUF_RCPT - twi_rcpt_tail == 1)
+ TWCR &= ~_BV(TWEA);
+ break;
+ /* DATA + NACK */
+ case TW_SR_DATA_NACK:
+ case TW_SR_GCALL_DATA_NACK:
+ rs232_putc ('x');
+ buf_rcpt[twi_rcpt_tail++] = TWDR;
+ /* no break */
+ /* STOP */
+ case TW_SR_STOP:
+ rs232_putc ('w');
+ data_ready = 1;
+ break;
+ }
+ TWCR |= _BV(TWINT);
+}
+
+/** Recopie dans 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)
+{
+ while (size --)
+ buf_send[size] = buf[size];
+}
+
diff --git a/n/avr/twi-slave/twi_slave.h b/n/avr/twi-slave/twi_slave.h
new file mode 100644
index 0000000..b8d6c20
--- /dev/null
+++ b/n/avr/twi-slave/twi_slave.h
@@ -0,0 +1,38 @@
+#ifndef twi_h
+#define twi_h
+/* twi.h */
+/* n.avr.twi - AVR TWI Module. {{{
+ *
+ * Copyright (C) 2004 Clément Demonchy
+ *
+ * Robot APB Team/Efrei 2005.
+ * 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 <inttypes.h>
+
+void
+twi_init (uint8_t addr);
+
+uint8_t
+twi_poll (uint8_t buf[], uint8_t size);
+
+void
+twi_update (uint8_t buf[], uint8_t size);
+#endif /* twi_h */