*
* -->
*
- * \brief I2C generic driver functions (interface).
+ * \brief I2C generic driver functions.
*
- * \version $Id$
* \author Francesco Sacchi <batt@develer.com>
+ *
+ * $WIZ$ module_name = "i2c"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_i2c.h"
+ * $WIZ$ module_hw = "bertos/hw/hw_i2c_bitbang.h"
+ * $WIZ$ module_supports = "not atmega103 and not atmega168 and not at91"
*/
+
#ifndef DRV_I2C_H
#define DRV_I2C_H
#include "cfg/cfg_i2c.h"
+
#include <cfg/compiler.h>
+#include <cfg/macros.h>
+
+#include <cpu/attr.h>
#define I2C_READBIT BV(0)
+#define i2c_init(FN_ARGS) PP_CAT(i2c_init ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS)
+
/**
* I2C Backends.
- * \{
+ * Sometimes your cpu does not have a builtin
+ * i2c driver or you don't want, for some reason, to
+ * use that.
+ * With this you can choose, at compile time, which backend to use.
+ *
+ * $WIZ$ i2c_backend = "I2C_BACKEND_BUILTIN", "I2C_BACKEND_BITBANG"
*/
#define I2C_BACKEND_BUILTIN 0 ///< Uses cpu builtin i2c driver
#define I2C_BACKEND_BITBANG 1 ///< Uses emulated bitbang driver
-/*\}*/
+
+/**
+ * I2c builtin prototypes.
+ * Do NOT use these function directly, instead,
+ * you can call the ones named without "_builtin_"
+ * and specify in cfg_i2c.h ( \see CONFIG_I2C_BACKEND)
+ * that you want the builtin backend.
+ * \{
+ */
void i2c_builtin_init(void);
bool i2c_builtin_start_w(uint8_t id);
bool i2c_builtin_start_r(uint8_t id);
void i2c_builtin_stop(void);
bool i2c_builtin_put(uint8_t _data);
int i2c_builtin_get(bool ack);
+/*\}*/
+/**
+ * I2c bitbang prototypes.
+ * Same thing here: do NOT use these function directly, instead,
+ * you can call the ones named without "_bitbang_"
+ * and specify in cfg_i2c.h ( \see CONFIG_I2C_BACKEND)
+ * that you want the bitbang backend.
+ * \{
+ */
void i2c_bitbang_init(void);
bool i2c_bitbang_start_w(uint8_t id);
bool i2c_bitbang_start_r(uint8_t id);
void i2c_bitbang_stop(void);
bool i2c_bitbang_put(uint8_t _data);
int i2c_bitbang_get(bool ack);
-
+/*\}*/
#if CONFIG_I2C_BACKEND == I2C_BACKEND_BUILTIN
- #define i2c_init i2c_builtin_init
- #define i2c_start_w i2c_builtin_start_w
- #define i2c_start_r i2c_builtin_start_r
- #define i2c_stop i2c_builtin_stop
- #define i2c_put i2c_builtin_put
- #define i2c_get i2c_builtin_get
+ #define i2c_init_0 i2c_builtin_init
+ #define i2c_start_w i2c_builtin_start_w
+ #define i2c_start_r i2c_builtin_start_r
+ #define i2c_stop i2c_builtin_stop
+ #define i2c_put i2c_builtin_put
+ #define i2c_get i2c_builtin_get
#elif CONFIG_I2C_BACKEND == I2C_BACKEND_BITBANG
- #define i2c_init i2c_bitbang_init
- #define i2c_start_w i2c_bitbang_start_w
- #define i2c_start_r i2c_bitbang_start_r
- #define i2c_stop i2c_bitbang_stop
- #define i2c_put i2c_bitbang_put
- #define i2c_get i2c_bitbang_get
+ #define i2c_init_0 i2c_bitbang_init
+ #define i2c_start_w i2c_bitbang_start_w
+ #define i2c_start_r i2c_bitbang_start_r
+ #define i2c_stop i2c_bitbang_stop
+ #define i2c_put i2c_bitbang_put
+ #define i2c_get i2c_bitbang_get
#else
#error Unsupported i2c backend.
#endif
bool i2c_send(const void *_buf, size_t count);
bool i2c_recv(void *_buf, size_t count);
+
+/*
+ * I2c new api
+ *
+ */
+
+struct I2cHardware;
+struct I2c;
+
+typedef int (*i2c_writeRope_t)(struct I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len, ...);
+typedef int (*i2c_readRope_t)(struct I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len, ...);
+
+typedef struct I2c
+{
+ int dev;
+ i2c_writeRope_t write;
+ i2c_readRope_t read;
+
+ struct I2cHardware* hw;
+} I2c;
+
+
+#include CPU_HEADER(i2c)
+
+INLINE void i2c_init_3(I2c *i2c, int dev, uint32_t clock)
+{
+ i2c_hw_init(i2c, dev, clock);
+}
+
+#define i2c_write(FN_ARGS) PP_CAT(i2c_write ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS)
+#define i2c_read(FN_ARGS) PP_CAT(i2c_read ## _, COUNT_PARMS(FN_ARGS)) (FN_ARGS)
+
+/*
+ * Overloaded functions definition.
+ */
+INLINE int i2c_write_5(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len)
+{
+ return i2c->write(i2c, slave_addr, flags, buf, len, NULL);
+}
+
+INLINE int i2c_read_5(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len)
+{
+ return i2c->read(i2c, slave_addr, flags, buf, len, NULL);
+}
+
+
+INLINE int i2c_write_7(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len,
+ const void *buf1, size_t len1)
+{
+ return i2c->write(i2c, slave_addr, flags, buf, len,
+ buf1, len1, NULL);
+}
+
+INLINE int i2c_read_7(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len,
+ void *buf1, size_t len1)
+
+{
+ return i2c->read(i2c, slave_addr, flags, buf, len,
+ buf1, len1, NULL);
+}
+
+
+INLINE int i2c_write_9(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len,
+ const void *buf1, size_t len1,
+ const void *buf2, size_t len2)
+{
+ return i2c->write(i2c, slave_addr, flags, buf, len,
+ buf1, len1,
+ buf2, len2, NULL);
+}
+
+INLINE int i2c_read_9(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len,
+ void *buf1, size_t len1,
+ void *buf2, size_t len2)
+{
+ return i2c->read(i2c, slave_addr, flags, buf, len,
+ buf1, len1,
+ buf2, len2, NULL);
+}
+
+INLINE int i2c_write_11(I2c *i2c, uint16_t slave_addr, int flags, const void *buf, size_t len,
+ const void *buf1, size_t len1,
+ const void *buf2, size_t len2,
+ const void *buf3, size_t len3)
+{
+ return i2c->write(i2c, slave_addr, flags, buf, len,
+ buf1, len1,
+ buf2, len2,
+ buf3, len3, NULL);
+}
+
+INLINE int i2c_read_11(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len,
+ void *buf1, size_t len1,
+ void *buf2, size_t len2,
+ void *buf3, size_t len3)
+
+{
+ return i2c->read(i2c, slave_addr, flags, buf, len,
+ buf1, len1,
+ buf2, len2,
+ buf3, len3, NULL);
+}
+
#endif
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