INLINE bool i2c_bitbang_start_1(struct I2c *i2c)
{
bool ret;
+ /* Clear all error, we restart */
+ i2c->errors &= ~(I2C_NO_ACK | I2C_ARB_LOST);
+
if (old_api)
{
SDA_HI;
i2c_halfbitDelay(I2C_DEV(i2c));
i2c_sdaLo(I2C_DEV(i2c));
i2c_halfbitDelay(I2C_DEV(i2c));
+
ret = !i2c_sdaIn(I2C_DEV(i2c));
}
return data;
}
-static void i2c_bitbang_putc(struct I2c *i2c, uint8_t _data)
+INLINE void i2c_bitbang_putcStop(struct I2c *i2c, uint8_t _data, bool stop)
{
/* Add ACK bit */
uint16_t data = (_data << 1) | 1;
i2c_sclHi(I2C_DEV(i2c));
i2c_halfbitDelay(I2C_DEV(i2c));
}
-
ack = !i2c_sdaIn(I2C_DEV(i2c));
+
i2c_sclLo(I2C_DEV(i2c));
i2c_halfbitDelay(I2C_DEV(i2c));
}
if (!ack)
- {
- LOG_ERR("NO ACK received\n");
i2c->errors |= I2C_NO_ACK;
- }
/* Generate stop condition (if requested) */
- if (((i2c->xfer_size == 1) && (i2c->flags & I2C_STOP)) || i2c->errors)
+ if (stop || i2c->errors)
i2c_bitbang_stop_1(i2c);
}
+static void i2c_bitbang_putc(struct I2c *i2c, uint8_t data)
+{
+ i2c_bitbang_putcStop(i2c, data,
+ (i2c->xfer_size == 1) && (i2c->flags & I2C_STOP));
+}
static void i2c_bitbang_start_2(struct I2c *i2c, uint16_t slave_addr)
{
* Loop on the select write sequence: when the device is busy
* writing previously sent data it will reply to the SLA_W
* control byte with a NACK. In this case, we must
- * keep trying until the deveice responds with an ACK.
+ * keep trying until the device responds with an ACK.
*/
ticks_t start = timer_clock();
while (i2c_bitbang_start_1(i2c))
{
- i2c_bitbang_putc(i2c, slave_addr);
+ i2c_bitbang_putcStop(i2c, slave_addr, false);
if (!(i2c->errors & I2C_NO_ACK))
return;