After NACKing a read operation, a raising SCL should not trigger a new
read from the slave. Introduce a new state which just waits for a stop
or start condition after NACK.
Signed-off-by: Marcus Comstedt <marcus@mc.pp.se>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
RECEIVING_BIT2,
RECEIVING_BIT1,
RECEIVING_BIT0,
- SENDING_ACK
+ SENDING_ACK,
+ SENT_NACK
} bitbang_i2c_state;
struct bitbang_i2c_interface {
}
switch (i2c->state) {
case STOPPED:
+ case SENT_NACK:
return bitbang_i2c_ret(i2c, 1);
case SENDING_BIT7 ... SENDING_BIT0:
i2c->state = RECEIVING_BIT7;
if (data != 0) {
DPRINTF("NACKED\n");
+ i2c->state = SENT_NACK;
i2c_nack(i2c->bus);
} else {
DPRINTF("ACKED\n");