1 files changed, 96 insertions, 0 deletions
diff --git a/bsps/arm/stm32f4/include/bsp/i2c.h b/bsps/arm/stm32f4/include/bsp/i2c.h
new file mode 100644
index 0000000000..fa18b1f92f
--- /dev/null
+++ b/bsps/arm/stm32f4/include/bsp/i2c.h
@@ -0,0 +1,96 @@
+/**
+ * @file
+ * @ingroup stm32f4_i2c I2C Support
+ * @brief I2C-module.
+ */
+
+/*
+ * Copyright (c) 2013 Christian Mauderer.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+/* The I2C-module can not run with libi2c. The reason for this is, that libi2c
+ * needs a possibility to generate a stop condition separately. This controller
+ * wants to generate the condition automatically when sending or receiving data.
+ */
+
+#ifndef LIBBSP_ARM_STM32F4_I2C_H
+#define LIBBSP_ARM_STM32F4_I2C_H
+
+#include <rtems.h>
+
+#include <bsp/io.h>
+#include <bsp/stm32f4.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup stm32f4_i2c I2C Support
+ * @ingroup arm_stm32f4
+ * @brief I2C Module
+ * @{
+ */
+
+typedef struct {
+  /**
+   * @brief The address of the slave without the read write bit.
+   * A 7-Bit address should be placed in the bits [6..0]
+   */
+  uint16_t addr;
+  /** @brief Read (true) or write (false) data */
+  bool read;
+  /** @brief Size of data to read or write */
+  size_t len;
+  /** @brief Buffer for data */
+  uint8_t *buf;
+} stm32f4_i2c_message;
+
+typedef struct {
+  volatile stm32f4_i2c *regs;
+  size_t index;
+  rtems_vector_number vector;
+  rtems_id mutex;
+  rtems_id task_id;
+  uint8_t *data;
+  uint8_t *last;
+  size_t len;
+  bool read;
+  uint8_t addr_with_rw;
+} stm32f4_i2c_bus_entry;
+
+/** @brief Initialise the i2c module. */
+rtems_status_code stm32f4_i2c_init(stm32f4_i2c_bus_entry *e);
+
+/** @brief Process a i2c message */
+rtems_status_code stm32f4_i2c_process_message(
+  stm32f4_i2c_bus_entry *e,
+  stm32f4_i2c_message *msg
+);
+
+/** @brief Set another baud rate than the default one */
+rtems_status_code stm32f4_i2c_set_bitrate(
+  stm32f4_i2c_bus_entry *e,
+  uint32_t br
+);
+
+extern stm32f4_i2c_bus_entry *const stm32f4_i2c1;
+extern stm32f4_i2c_bus_entry *const stm32f4_i2c2;
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_STM32F4_I2C_H */