isqc_comm.X/isqc_tools.h
void isqc_ack()
{
    isqc_wait();
    ACKDT = 0; // (0,1) = ('ack', 'nack')
    ACKEN = 1; //send 'ack'
}
/* 6. ACK
 * Master receive mode only */
6. ACK
Master receive mode only
6 . ACK Master receive mode only
void isqc_ack()
{
    isqc_wait();
    ACKDT = 0; 
    ACKEN = 1; 
}
void isqc_ack ( ) { isqc_wait ( ) ; ACKDT = 0 ; ACKEN = 1 ; }
6.
6 .
// (0,1) = ('ack', 'nack') //send 'ack'