First implementation of i2c module for stm32.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3969 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cpu/cortex-m3/drv/i2c_stm32.c b/bertos/cpu/cortex-m3/drv/i2c_stm32.c
new file mode 100644 (file)
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+++ b/bertos/cpu/cortex-m3/drv/i2c_stm32.c
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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief STM32F103xx I2C driver.
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+#include "cfg/cfg_i2c.h"
+
+#define LOG_LEVEL  I2C_LOG_LEVEL
+#define LOG_FORMAT I2C_LOG_FORMAT
+#include <cfg/log.h>
+
+#include <cfg/debug.h>
+#include <cfg/macros.h> // BV()
+#include <cfg/module.h>
+
+#include <drv/i2c.h>
+
+/**
+ * Send START condition on the bus.
+ *
+ * \return true on success, false otherwise.
+ */
+static bool i2c_builtin_start(void)
+{
+
+       return false;
+}
+
+
+/**
+ * Send START condition and select slave for write.
+ * \c id is the device id comprehensive of address left shifted by 1.
+ * The LSB of \c id is ignored and reset to 0 for write operation.
+ *
+ * \return true on success, false otherwise.
+ */
+bool i2c_builtin_start_w(uint8_t id)
+{
+       return false;
+}
+
+
+/**
+ * Send START condition and select slave for read.
+ * \c id is the device id comprehensive of address left shifted by 1.
+ * The LSB of \c id is ignored and set to 1 for read operation.
+ *
+ * \return true on success, false otherwise.
+ */
+bool i2c_builtin_start_r(uint8_t id)
+{
+
+       return false;
+}
+
+
+/**
+ * Send STOP condition.
+ */
+void i2c_builtin_stop(void)
+{
+
+}
+
+
+/**
+ * Put a single byte in master transmitter mode
+ * to the selected slave device through the TWI bus.
+ *
+ * \return true on success, false on error.
+ */
+bool i2c_builtin_put(const uint8_t data)
+{
+
+       return true;
+}
+
+/**
+ * Get 1 byte from slave in master transmitter mode
+ * to the selected slave device through the TWI bus.
+ * If \a ack is true issue a ACK after getting the byte,
+ * otherwise a NACK is issued.
+ *
+ * \return the byte read if ok, EOF on errors.
+ */
+int i2c_builtin_get(bool ack)
+{
+
+       return 0;
+}
+
+MOD_DEFINE(i2c);
+
+/**
+ * Initialize TWI module.
+ */
+void i2c_builtin_init(void)
+{
+       MOD_INIT(i2c);
+}