#include "cfg/cfg_i2c.h"
+#define LOG_LEVEL I2C_LOG_LEVEL
+#define LOG_FORMAT I2C_LOG_FORMAT
+
+#include <cfg/log.h>
+
#include <cfg/compiler.h>
#include <cfg/macros.h>
#include <cfg/debug.h>
/*
* I2c new api
- *
*/
-#define I2C_OK 0
-#define I2C_START_ERR BV(0)
-#define I2C_NO_ACK BV(1)
-#define I2C_ARBLST BV(2)
+ /*
+ * I2C error flags
+ */
+#define I2C_OK 0 ///< I2C no errors flag
+#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;
#include CPU_HEADER(i2c)
+void i2c_swSend(struct I2c *i2c, const void *_buf, size_t count);
+void i2c_swRecv(struct 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;
ASSERT(i2c->vt);
ASSERT(i2c->vt->get);
- 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->get(i2c);
+ i2c->xfer_size--;
+ return data;
+ }
else
return 0xFF;
}
ASSERT(i2c->vt);
ASSERT(i2c->vt->put);
- 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->xfer_size--;
+ }
}
INLINE void i2c_send(I2c *i2c, const void *_buf, size_t count)
ASSERT(i2c);
int err = i2c->errors;
i2c->errors = 0;
+
+ LOG_ERRB(
+ if (err)
+ LOG_ERR("err[%02x]\n", err);
+ );
+
return err;
}