update I2C driver, which now just use small memory

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2159 bbd45198-f89e-11dd-88c7-29a3b14d5316

4 files changed, 156 insertions, 0 deletions

diff --git a/components/drivers/include/drivers/i2c-bit-ops.h b/components/drivers/include/drivers/i2c-bit-ops.h
new file mode 100644
index 0000000000..8b9253d9ff
--- /dev/null
+++ b/components/drivers/include/drivers/i2c-bit-ops.h
@@ -0,0 +1,41 @@
+/*
+ * File      : i2c-bit-ops.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author		Notes
+ * 2012-04-25     weety		first version
+ */
+
+#ifndef __I2C_BIT_OPS_H__
+#define __I2C_BIT_OPS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct rt_i2c_bit_ops {
+	void *data;  /* private data for lowlevel routines */
+	void (*set_sda) (void *data, rt_int32_t state);
+	void (*set_scl) (void *data, rt_int32_t state);
+	rt_int32_t  (*get_sda) (void *data);
+	rt_int32_t  (*get_scl) (void *data);
+	
+	void (*udelay) (rt_uint32_t us);
+
+	rt_uint32_t delay_us;  /* scl and sda line delay */
+	rt_uint32_t timeout;  /* in tick */
+};
+
+rt_err_t rt_i2c_bit_add_bus(struct rt_i2c_bus_device *bus, const char *bus_name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file
diff --git a/components/drivers/include/drivers/i2c.h b/components/drivers/include/drivers/i2c.h
new file mode 100644
index 0000000000..69b43e95b4
--- /dev/null
+++ b/components/drivers/include/drivers/i2c.h
@@ -0,0 +1,79 @@
+/*
+ * File      : i2c.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author		Notes
+ * 2012-04-25     weety		first version
+ */
+
+#ifndef __I2C_H__
+#define __I2C_H__
+
+#include <rtthread.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RT_I2C_WR                0x0000
+#define RT_I2C_RD               (1u << 0)
+#define RT_I2C_ADDR_10BIT       (1u << 2)  /* this is a ten bit chip address */
+#define RT_I2C_NO_START         (1u << 4)
+#define RT_I2C_IGNORE_NACK      (1u << 5)
+#define RT_I2C_NO_READ_ACK      (1u << 6)  /* when I2C reading, we do not ACK */
+
+struct rt_i2c_msg {
+	rt_uint16_t addr;
+	rt_uint16_t flags;
+	rt_uint16_t len;
+	rt_uint8_t  *buf;
+};
+
+struct rt_i2c_bus_device;
+
+struct rt_i2c_bus_device_ops {
+	rt_size_t (*master_xfer) (struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num);
+	rt_size_t (*slave_xfer) (struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num);
+	rt_err_t (*i2c_bus_control) (struct rt_i2c_bus_device *bus, rt_uint32_t, rt_uint32_t);
+};
+
+/*for i2c bus driver*/
+struct rt_i2c_bus_device {
+	struct rt_device parent;
+	const struct rt_i2c_bus_device_ops *ops;
+	rt_uint16_t  flags;
+	rt_uint16_t  addr;
+	struct rt_mutex lock;
+	rt_uint32_t  timeout;
+	rt_uint32_t  retries;
+	void *priv;
+};
+
+#ifdef RT_I2C_DEBUG
+#define i2c_dbg(fmt, ...)	rt_kprintf(fmt, ##__VA_ARGS__)
+#else
+#define i2c_dbg(fmt, ...)
+#endif
+
+rt_err_t rt_i2c_bus_device_register(struct rt_i2c_bus_device *bus, const char *bus_name);
+struct rt_i2c_bus_device* rt_i2c_bus_device_find(const char *bus_name);
+rt_size_t rt_i2c_transfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num);
+rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus, rt_uint16_t addr, 
+                               rt_uint16_t flags, const rt_uint8_t *buf, 
+                               rt_uint32_t count);
+rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus, rt_uint16_t addr, 
+                               rt_uint16_t flags, rt_uint8_t *buf, 
+                               rt_uint32_t count);
+rt_err_t rt_i2c_core_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/components/drivers/include/drivers/i2c_dev.h b/components/drivers/include/drivers/i2c_dev.h
new file mode 100644
index 0000000000..b173e99333
--- /dev/null
+++ b/components/drivers/include/drivers/i2c_dev.h
@@ -0,0 +1,27 @@
+#ifndef __I2C_DEV_H__
+#define __I2C_DEV_H__
+
+#include <rtthread.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RT_I2C_DEV_CTRL_10BIT        0x20
+#define RT_I2C_DEV_CTRL_ADDR         0x21
+#define RT_I2C_DEV_CTRL_TIMEOUT      0x22
+#define RT_I2C_DEV_CTRL_RW           0x23
+
+struct rt_i2c_priv_data {
+	struct rt_i2c_msg  *msgs;
+	rt_size_t  number;
+};
+
+rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device* bus, const char* name);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index 2b4b7b9ec4..77dbddd9ae 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -67,4 +67,13 @@ rt_size_t rt_ringbuffer_emptry_size(struct rt_ringbuffer* rb);
 #include "drivers/serial.h"
 #endif
 
+#ifdef RT_USING_I2C
+#include "drivers/i2c.h"
+#include "drivers/i2c_dev.h"
+#endif
+
+#ifdef RT_USING_I2C_BITOPS
+#include "drivers/i2c-bit-ops.h"
+#endif
+
 #endif