* $WIZ$ module_name = "i2c"
* $WIZ$ module_configuration = "bertos/cfg/cfg_i2c.h"
* $WIZ$ module_hw = "bertos/hw/hw_i2c_bitbang.h"
+ * $WIZ$ module_depends = "i2c_bitbang"
* $WIZ$ module_supports = "not atmega103 and not atmega168 and not at91"
*/
#define I2C_READBIT BV(0)
#if COMPILER_C99
- #define i2c_init(...) PP_CAT(i2c_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
+ #define i2c_init(...) PP_CAT(i2c_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
+ #define i2c_start_w(...) PP_CAT(i2c_start_w ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
+ #define i2c_start_r(...) PP_CAT(i2c_start_r ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
#else
- #define i2c_init(args...) PP_CAT(i2c_init ## _, COUNT_PARMS(args)) (args)
+ #define i2c_init(args...) PP_CAT(i2c_init ## _, COUNT_PARMS(args)) (args)
+ #define i2c_start_w(args...) PP_CAT(i2c_start_w ## _, COUNT_PARMS(args)) (args)
+ #define i2c_start_r(args...) PP_CAT(i2c_start_r ## _, COUNT_PARMS(args)) (args)
#endif
+
+/**
+ * \name I2C bitbang devices enum
+ */
+enum
+{
+ I2C_BITBANG_OLD = -1,
+ I2C_BITBANG0 = 1000,
+ I2C_BITBANG1,
+ I2C_BITBANG2,
+ I2C_BITBANG3,
+ I2C_BITBANG4,
+ I2C_BITBANG5,
+ I2C_BITBANG6,
+ I2C_BITBANG7,
+ I2C_BITBANG8,
+ I2C_BITBANG9,
+
+ I2C_BITBANG_CNT /**< Number of serial ports */
+};
+
+#if !CONFIG_I2C_DISABLE_OLD_API
+
/**
* 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
-#if 0
-
/**
* I2c builtin prototypes.
* Do NOT use these function directly, instead,
* 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);
* 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);
int i2c_bitbang_get(bool ack);
/*\}*/
+#ifndef CONFIG_I2C_BACKEND
+#define CONFIG_I2C_BACKEND I2C_BACKEND_BUILTIN
+#endif
+
#if CONFIG_I2C_BACKEND == I2C_BACKEND_BUILTIN
- #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
+ #define i2c_start_w_1 i2c_builtin_start_w
+ #define i2c_start_r_1 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_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
+ #define i2c_start_w_1 i2c_bitbang_start_w
+ #define i2c_start_r_1 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);
-#endif
+#endif /* !CONFIG_I2C_DISABLE_OLD_API */
/*
- * I2c new api
- *
+ * I2C error flags
*/
-#define I2C_OK 0
-#define I2C_START_ERR BV(0)
-#define I2C_NO_ACK BV(1)
-
+#define I2C_OK 0 ///< I2C no errors flag
+#define I2C_DATA_NACK BV(4) ///< I2C generic error
+#define I2C_ERR BV(3) ///< I2C generic error
+#define I2C_ARB_LOST BV(2) ///< I2C arbitration lost error
+#define I2C_START_TIMEOUT BV(0) ///< I2C timeout error on start
+#define I2C_NO_ACK BV(1) ///< I2C no ack for sla start
-#define I2C_NOSTOP 0
-#define I2C_STOP BV(0)
-#define I2C_START_R BV(1)
-#define I2C_START_W 0
+/*
+ * I2C command flags
+ */
+#define I2C_NOSTOP 0 ///< Do not program the stop for current transition
+#define I2C_STOP BV(0) ///< Program the stop for current transition
+#define I2C_START_R BV(1) ///< Start read command
+#define I2C_START_W 0 ///< Start write command
#define I2C_TEST_START(flag) ((flag) & I2C_START_R)
+#define I2C_TEST_STOP(flag) ((flag) & I2C_STOP)
struct I2cHardware;
struct I2c;
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 uint8_t (*i2c_getc_t)(struct I2c *i2c);
+typedef void (*i2c_putc_t)(struct I2c *i2c, uint8_t data);
+typedef void (*i2c_write_t)(struct I2c *i2c, const void *_buf, size_t count);
+typedef void (*i2c_read_t)(struct I2c *i2c, void *_buf, size_t count);
typedef struct I2cVT
{
i2c_start_t start;
- i2c_get_t get;
- i2c_put_t put;
- i2c_send_t send;
- i2c_recv_t recv;
+ i2c_getc_t getc;
+ i2c_putc_t putc;
+ i2c_write_t write;
+ i2c_read_t read;
} I2cVT;
typedef struct I2c
#include CPU_HEADER(i2c)
+/*
+ * Low level i2c init implementation prototype.
+ */
+void i2c_hw_init(I2c *i2c, int dev, uint32_t clock);
+void i2c_hw_bitbangInit(I2c *i2c, int dev);
+
+void i2c_genericWrite(I2c *i2c, const void *_buf, size_t count);
+void i2c_genericRead(I2c *i2c, void *_buf, size_t count);
+
INLINE void i2c_start(I2c *i2c, uint16_t slave_addr, size_t size)
{
ASSERT(i2c->vt);
ASSERT(i2c->vt->start);
- ASSERT(i2c->xfer_size == 0);
+
+ if (!i2c->errors)
+ ASSERT(i2c->xfer_size == 0);
i2c->errors = 0;
i2c->xfer_size = size;
i2c->vt->start(i2c, slave_addr);
}
-INLINE void i2c_start_r(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
+INLINE void i2c_start_r_4(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
{
ASSERT(i2c);
i2c->flags = flags | I2C_START_R;
- i2c_start(i2c, slave_addr)
+ i2c_start(i2c, slave_addr, size);
}
-INLINE void i2c_start_w(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
+INLINE void i2c_start_w_4(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
{
ASSERT(i2c);
i2c->flags = flags & ~I2C_START_R;
- i2c_start(i2c, slave_addr);
+ i2c_start(i2c, slave_addr, size);
}
-INLINE uint8_t i2c_get(I2c *i2c)
+INLINE uint8_t i2c_getc(I2c *i2c)
{
ASSERT(i2c);
ASSERT(i2c->vt);
- ASSERT(i2c->vt->get);
+ ASSERT(i2c->vt->getc);
- ASSERT(i2c->xfer_size >= 1);
+ ASSERT(i2c->xfer_size);
ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_R);
if (!i2c->errors)
- return i2c->vt->get(i2c);
+ {
+ uint8_t data = i2c->vt->getc(i2c);
+ i2c->xfer_size--;
+ return data;
+ }
else
return 0xFF;
}
-INLINE void i2c_put(I2c *i2c, uint8_t data)
+INLINE void i2c_putc(I2c *i2c, uint8_t data)
{
ASSERT(i2c);
ASSERT(i2c->vt);
- ASSERT(i2c->vt->put);
+ ASSERT(i2c->vt->putc);
- ASSERT(i2c->xfer_size >= 1);
+ ASSERT(i2c->xfer_size);
ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_W);
if (!i2c->errors)
- i2c->vt->put(i2c, data);
+ {
+ i2c->vt->putc(i2c, data);
+ i2c->xfer_size--;
+ }
}
-INLINE void i2c_send(I2c *i2c, const void *_buf, size_t count)
+INLINE void i2c_write(I2c *i2c, const void *_buf, size_t count)
{
ASSERT(i2c);
ASSERT(i2c->vt);
- ASSERT(i2c->vt->send);
+ ASSERT(i2c->vt->write);
ASSERT(_buf);
ASSERT(count);
ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_W);
if (!i2c->errors)
- i2c->vt->send(i2c, _buf, count);
+ i2c->vt->write(i2c, _buf, count);
}
-INLINE void i2c_recv(I2c *i2c, void *_buf, size_t count)
+INLINE void i2c_read(I2c *i2c, void *_buf, size_t count)
{
ASSERT(i2c);
ASSERT(i2c->vt);
- ASSERT(i2c->vt->recv);
+ ASSERT(i2c->vt->read);
ASSERT(_buf);
ASSERT(count);
ASSERT(I2C_TEST_START(i2c->flags) == I2C_START_R);
if (!i2c->errors)
- i2c->vt->recv(i2c, _buf, count);
+ i2c->vt->read(i2c, _buf, count);
}
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)
+#define i2c_init_3(i2c, dev, clock) ((((dev) >= I2C_BITBANG0) | ((dev) == I2C_BITBANG_OLD)) ? \
+ i2c_hw_bitbangInit((i2c), (dev)) : i2c_hw_init((i2c), (dev), (clock)))
+
+#if !CONFIG_I2C_DISABLE_OLD_API
+
+extern I2c local_i2c_old_api;
+
+INLINE void i2c_init_0(void)
{
- i2c_hw_init(i2c, dev, clock);
+ #if CONFIG_I2C_BACKEND == I2C_BACKEND_BITBANG
+ i2c_init_3(&local_i2c_old_api, I2C_BITBANG_OLD, CONFIG_I2C_FREQ);
+ #else
+ i2c_init_3(&local_i2c_old_api, 0, CONFIG_I2C_FREQ);
+ #endif
}
+#endif /* !CONFIG_I2C_DISABLE_OLD_API */
+
+
#endif
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