From 4d10e19afe45695f30e7bf408757e92893f3fd2c Mon Sep 17 00:00:00 2001 From: Nélio Laranjeiro Date: Sun, 10 Feb 2008 23:07:45 +0100 Subject: SPI driver for AVR. It's only a first shoot, it has not been tested in the real AVR. --- digital/avr/modules/spi/Makefile | 5 ++ digital/avr/modules/spi/Makefile.module | 1 + digital/avr/modules/spi/README | 24 +++++++ digital/avr/modules/spi/spi.c | 94 +++++++++++++++++++++++++++ digital/avr/modules/spi/spi.h | 79 +++++++++++++++++++++++ digital/avr/modules/spi/test/Makefile | 17 +++++ digital/avr/modules/spi/test/avrconfig.h | 86 +++++++++++++++++++++++++ digital/avr/modules/spi/test/spi_host.c | 107 +++++++++++++++++++++++++++++++ digital/avr/modules/spi/test/test_spi.c | 59 +++++++++++++++++ 9 files changed, 472 insertions(+) create mode 100755 digital/avr/modules/spi/Makefile create mode 100755 digital/avr/modules/spi/Makefile.module create mode 100644 digital/avr/modules/spi/README create mode 100644 digital/avr/modules/spi/spi.c create mode 100644 digital/avr/modules/spi/spi.h create mode 100755 digital/avr/modules/spi/test/Makefile create mode 100644 digital/avr/modules/spi/test/avrconfig.h create mode 100644 digital/avr/modules/spi/test/spi_host.c create mode 100644 digital/avr/modules/spi/test/test_spi.c (limited to 'digital') diff --git a/digital/avr/modules/spi/Makefile b/digital/avr/modules/spi/Makefile new file mode 100755 index 00000000..fa689635 --- /dev/null +++ b/digital/avr/modules/spi/Makefile @@ -0,0 +1,5 @@ +BASE = ../.. +DOC = spi.html +EXTRACTDOC = spi.h spi.c + +include $(BASE)/make/Makefile.gen diff --git a/digital/avr/modules/spi/Makefile.module b/digital/avr/modules/spi/Makefile.module new file mode 100755 index 00000000..f2529dfa --- /dev/null +++ b/digital/avr/modules/spi/Makefile.module @@ -0,0 +1 @@ +spi_SOURCES = spi.c diff --git a/digital/avr/modules/spi/README b/digital/avr/modules/spi/README new file mode 100644 index 00000000..44092fd9 --- /dev/null +++ b/digital/avr/modules/spi/README @@ -0,0 +1,24 @@ +avr.spi - SPI AVR module. + +Serial Peripheral Inteface for AVR. See modules README for more details about +AVR modules. + +Copyright (C) 2008 Nélio Laranjeiro + +APBTeam: + Web: http://apbteam.org/ + Email: team AT apbteam DOT org + +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. diff --git a/digital/avr/modules/spi/spi.c b/digital/avr/modules/spi/spi.c new file mode 100644 index 00000000..e99055e0 --- /dev/null +++ b/digital/avr/modules/spi/spi.c @@ -0,0 +1,94 @@ +/* spi.c */ +/* {{{ + * + * Copyright (C) 2008 Nélio Laranjeiro + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * 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 "spi.h" + +/** Spi driver context. */ +static spi_t spi_global; + +/** Initialise the SPI Control Register. + * \param sprc the sprc register data to be store in the register. + * \param cb the function call back to call the user which receive the data. + * \param user_data the user data to be provieded in the function call back. + */ +void +spi_init(uint8_t sprc, spi_recv_cb_t cb, void *user_data) +{ + SPRC = sprc; + spi_global.cb = cb; + spi_global.recv_user_data = user_data; +} + +/** Send a data to the Slave. + * \param data the data to send + * \param length the length of the data in bytes. + */ +void +spi_send(uint8_t *data, u8 length) +{ + uint i; + + for ( i = 0; i < length; i++) + { + // Insert the data in the data register, the SPI will begin to send it + // automatically. + SPDR = data[i]; + + // Wait the end of the transmission. + while(!(SPSR & (1< +#include "io.h" +#include "common.h" +#include "modules/proto/proto.h" +#include "modules/spi/spi.h" + +/** Spi driver context. */ +static spi_t spi_global; + +#ifdef HOST +static volatile uint8_t SPCR; +static volatile uint8_t SPDR; +static volatile uint8_t SPSR; +#endif + +/** Initialise the SPI Control Register. + * \param sprc the sprc register data to be store in the register. + * \param cb the function call back to call the user which receive the data. + * \param user_data the user data to be provieded in the function call back. + */ +void +spi_init(uint8_t sprc, spi_recv_cb_t cb, void *user_data) +{ + SPCR = sprc; + spi_global.recv_cb = cb; + spi_global.recv_user_data = user_data; +} + +/** Uninitialise the SPI module. + * Unused on the target + */ +void +spi_uninit (void) +{ +} + +/** Send a data to the Slave. + * \param data the data to send + * \param length the length of the data in bytes. + */ +void +spi_send(uint8_t *data, u8 length) +{ + uint8_t i; + + for ( i = 0; i < length; i++) + { + proto_send0 (data[i]); + } +} + +/** Receive a data from the SPI bus. + * \return the data received from the bus. + */ +uint8_t +spi_recv(void) +{ + return SPDR; +} + +/** Return the status register from the SPI driver. + * \return the status register value + */ +uint8_t +spi_status(void) +{ + return SPSR; +} + +/** Function called by the interruption if an IT is requested. + * + */ +void +spi_catch_it(void) +{ + // call the call back. + (*spi_global.recv_cb) (spi_global.recv_user_data); +} + +void +proto_callback (uint8_t cmd, uint8_t size, uint8_t *args) +{ +} diff --git a/digital/avr/modules/spi/test/test_spi.c b/digital/avr/modules/spi/test/test_spi.c new file mode 100644 index 00000000..08e34db7 --- /dev/null +++ b/digital/avr/modules/spi/test/test_spi.c @@ -0,0 +1,59 @@ +/* test_spi.c */ +/* avr.spi - SPI AVR module. {{{ + * + * Copyright (C) 2008 Nélio Laranjeiro + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * 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 +#include +#include "io.h" +#include "../spi.h" + +#ifdef HOST +extern volatile uint8_t SPDR; +#endif + +/** Call back function to be called on the AVR interruption */ +void +spi_interruption_function (void *user_data) +{ +} + +int +main (void) +{ + uint8_t test [10]; + uint8_t res; + + //initialise the spi. + spi_init (0x14, spi_interruption_function, 0x0); + + test[0] = 0x2; + test[1] = 0x3; + test[2] = 0x4; + + spi_send (test, 3); + + res = spi_recv (); + + return 0; +} + -- cgit v1.2.3