#include <cfg/compiler.h>
#include <cfg/macros.h>
+#include <cfg/debug.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)
+#if COMPILER_C99
+ #define i2c_init(...) PP_CAT(i2c_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
+#else
+ #define i2c_init(args...) PP_CAT(i2c_init ## _, COUNT_PARMS(args)) (args)
+#endif
/**
* I2C Backends.
#define I2C_BACKEND_BUILTIN 0 ///< Uses cpu builtin i2c driver
#define I2C_BACKEND_BITBANG 1 ///< Uses emulated bitbang driver
+#if 0
/**
* I2c builtin prototypes.
#error Unsupported i2c backend.
#endif
+
bool i2c_send(const void *_buf, size_t count);
bool i2c_recv(void *_buf, size_t count);
+#endif
/*
* I2c new api
*
*/
+#define I2C_OK 0
+#define I2C_START_ERR BV(0)
+#define I2C_NO_ACK BV(1)
+
-#define I2C_STOP BV(0) ///< Says to driver to generate the stop after i2c tranfer.
+#define I2C_NOSTOP 0
+#define I2C_STOP BV(0)
+#define I2C_START_R BV(1)
+#define I2C_START_W 0
+
+
+#define I2C_TEST_START(flag) ((flag) & I2C_START_R)
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 void (*i2c_start_t)(struct I2c *i2c, uint16_t slave_addr);
+typedef uint8_t (*i2c_get_t)(struct I2c *i2c);
+typedef void (*i2c_put_t)(struct I2c *i2c, uint8_t data);
+typedef void (*i2c_send_t)(struct I2c *i2c, const void *_buf, size_t count);
+typedef void (*i2c_recv_t)(struct I2c *i2c, void *_buf, size_t count);
-typedef struct I2c
+typedef struct I2cVT
{
- int dev;
- i2c_writeRope_t write;
- i2c_readRope_t read;
+ i2c_start_t start;
+ i2c_get_t get;
+ i2c_put_t put;
+ i2c_send_t send;
+ i2c_recv_t recv;
+} I2cVT;
+typedef struct I2c
+{
+ int errors;
+ int flags;
+ size_t xfer_size;
struct I2cHardware* hw;
+ const struct I2cVT *vt;
} I2c;
#include CPU_HEADER(i2c)
-INLINE void i2c_init_3(I2c *i2c, int dev, uint32_t clock)
+INLINE void i2c_start_r(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
{
- i2c_hw_init(i2c, dev, clock);
-}
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->start);
+ ASSERT(i2c->xfer_size == 0);
-#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)
+ i2c->flags = flags | I2C_START_R;
+ i2c->errors = 0;
+ i2c->xfer_size = size;
-/*
- * 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);
+ i2c->vt->start(i2c, slave_addr);
}
-INLINE int i2c_read_5(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len)
+INLINE void i2c_start_w(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
{
- return i2c->read(i2c, slave_addr, flags, buf, len, NULL);
-}
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->start);
+ ASSERT(i2c->xfer_size == 0);
+ i2c->flags = flags & ~I2C_START_R;
+ i2c->errors = 0;
+ i2c->xfer_size = size;
-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);
+ i2c->vt->start(i2c, slave_addr);
}
-INLINE int i2c_read_7(I2c *i2c, uint16_t slave_addr, int flags, void *buf, size_t len,
- void *buf1, size_t len1)
-
+INLINE uint8_t i2c_get(I2c *i2c)
{
- return i2c->read(i2c, slave_addr, flags, buf, len,
- buf1, len1, NULL);
-}
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->get);
+
+ ASSERT(i2c->xfer_size >= 1);
+ ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_R);
-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)
+ if (!i2c->errors)
+ return i2c->vt->get(i2c);
+ else
+ return 0xFF;
+}
+
+INLINE void i2c_put(I2c *i2c, uint8_t data)
{
- return i2c->write(i2c, slave_addr, flags, buf, len,
- buf1, len1,
- buf2, len2, NULL);
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->put);
+
+ ASSERT(i2c->xfer_size >= 1);
+
+ ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_W);
+
+ if (!i2c->errors)
+ i2c->vt->put(i2c, data);
}
-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)
+INLINE void i2c_send(I2c *i2c, const void *_buf, size_t count)
{
- return i2c->read(i2c, slave_addr, flags, buf, len,
- buf1, len1,
- buf2, len2, NULL);
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->send);
+
+ ASSERT(_buf);
+ ASSERT(count);
+ ASSERT(count <= i2c->xfer_size);
+
+ ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_W);
+
+ if (!i2c->errors)
+ i2c->vt->send(i2c, _buf, count);
}
-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)
+
+INLINE void i2c_recv(I2c *i2c, void *_buf, size_t count)
{
- return i2c->write(i2c, slave_addr, flags, buf, len,
- buf1, len1,
- buf2, len2,
- buf3, len3, NULL);
+ ASSERT(i2c);
+ ASSERT(i2c->vt);
+ ASSERT(i2c->vt->recv);
+
+ ASSERT(_buf);
+ ASSERT(count);
+ ASSERT(count <= i2c->xfer_size);
+
+ ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_R);
+
+ if (!i2c->errors)
+ i2c->vt->recv(i2c, _buf, count);
}
-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)
+INLINE int i2c_error(I2c *i2c)
+{
+ ASSERT(i2c);
+ int err = i2c->errors;
+ i2c->errors = 0;
+ return err;
+}
+INLINE void i2c_init_3(I2c *i2c, int dev, uint32_t clock)
{
- return i2c->read(i2c, slave_addr, flags, buf, len,
- buf1, len1,
- buf2, len2,
- buf3, len3, NULL);
+ i2c_hw_init(i2c, dev, clock);
}
#endif
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