void
slapi_be_free(Slapi_Backend **be)
{
be_done(*be);
slapi_ch_free((void**)be);
*be = NULL;
}
static void _hwpl_i2c_isr(int port) {
uint8_t stat_value;
LPC_I2C_TypeDef * i2c_regs;
// this handler deals with master read and master write only
i2c_regs = i2c_get_regs(port);
if ( i2c_regs == NULL ){
be_done(port);
}
stat_value = i2c_regs->STAT;
switch ( stat_value ){
case 0x08: //Start Condition has been sent
case 0x10: //Repeated Start condition
i2c_local[port].err = 0;
if ( i2c_local[port].state == I2C_STATE_NONE){
i2c_regs->DAT = i2c_local[port].addr | 0x01; //Set the Read bit -- repeated start after write ptr
} else {
i2c_regs->DAT = i2c_local[port].addr;
}
i2c_regs->CONSET = AA;
i2c_regs->CONCLR = STA;
break;
case 0x18: //SLA+W transmitted -- Ack Received
i2c_regs->DAT = i2c_local[port].ptr.ptr8[1]; //Send the offset pointer (MSB of 16 or 8 bit)
i2c_regs->CONSET = AA;
break;
case 0x28: //Data byte transmitted -- Ack Received
if (( i2c_local[port].state == I2C_STATE_RD_16_OP )||
( i2c_local[port].state == I2C_STATE_WR_16_OP )){
i2c_regs->DAT = i2c_local[port].ptr.ptr8[0]; //Send the offset pointer (LSB)
i2c_regs->CONSET = AA;
if ( i2c_local[port].state == I2C_STATE_RD_16_OP ){
i2c_local[port].state = I2C_STATE_RD_OP;
}
break;
}
if ( i2c_local[port].state == I2C_STATE_RD_OP ){
i2c_regs->CONSET = AA|STA; //Restart (then send read command)
i2c_local[port].state = I2C_STATE_NONE;
break;
}
//Transmit data
if ( i2c_local[port].size ){
i2c_regs->DAT = *(i2c_local[port].data);
i2c_local[port].data++;
i2c_regs->CONSET = AA;
i2c_local[port].size--;
} else {
i2c_regs->CONSET = STO|AA;
i2c_local[port].state = I2C_STATE_NONE | I2C_DONE_FLAG;
}
break;
case 0x20:
case 0x30:
case 0x48:
//Receiver nack'd
i2c_regs->CONSET = STO;
i2c_local[port].size = 0;
i2c_local[port].err = I2C_ERROR_ACK;
i2c_local[port].state = I2C_DONE_FLAG;
break;
case 0x38:
i2c_local[port].size = 0;
i2c_regs->CONSET = STO;
i2c_local[port].err = I2C_ERROR_ARBITRATION_LOST;
i2c_local[port].state = I2C_DONE_FLAG;
break;
case 0x40: //SLA+R transmitted -- Ack received
if ( i2c_local[port].size > 1 ){
i2c_regs->CONSET = AA; //only ACK if more than one byte is coming
} else {
i2c_regs->CONCLR = AA;
}
break;
case 0x50: //Data Byte received -- Ack returned
//Receive Data
if ( i2c_local[port].size ) i2c_local[port].size--;
*(i2c_local[port].data) = (char)i2c_regs->DAT;
i2c_local[port].data++;
if ( i2c_local[port].size > 1 ){
i2c_regs->CONSET = AA;
} else {
i2c_regs->CONCLR = AA;
}
break;
case 0x58: //Data byte received -- Not Ack returned
if ( i2c_local[port].size ) i2c_local[port].size--;
*(i2c_local[port].data) = (char)i2c_regs->DAT;
i2c_local[port].data++;
i2c_regs->CONSET = STO;
i2c_local[port].state = I2C_STATE_NONE | I2C_DONE_FLAG;
break;
case 0x00:
i2c_local[port].err = I2C_ERROR_START;
i2c_local[port].state = I2C_DONE_FLAG;
i2c_regs->CONSET = STO;
break;
}
i2c_regs->CONCLR = SI; //clear the interrupt flag
if ( i2c_local[port].state & I2C_DONE_FLAG ){
exec_callback(port, 0);
}
}
