/****************************************************************************** ** Copyright 2015 MBARI - Monterey Bay Aquarium Research Institute ******************************************************************************* ******************************************************************************* ** Summary : Routines to control PCAL6416A 16 Bit I/O Expander ** Filename : pcal6416.c ** Author : Luke Coletti ** Project : ** Version : 1.0 ** Compiler : MetroWerks Code Warrior v8.3 ** Created : 12/15/14 ** Archived : ******************************************************************************* ** Modification History: ** 01/02/15 : CF2 Port, LJC *******************************************************************************/ #include // Persistor BIOS and I/O Definitions #include int PCAL6416_Init( void ) { int ret; PCAL6416_Reset(); I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( PCAL6416_OUTCONFIG_REG ); //Send Command Byte (Reg Address) ret &= I2C_WrByte( PCAL6416_OUTCONFIG_VAL ); //Init Port Configuration (push-pull or open-drain) of GPIO I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( PCAL6416_OUTPUT_PORT0 ); //Send Command Byte (Reg Address) ret &= I2C_WrByte( PCAL6416_OUTPUT_VAL0 ); //Output Port0 Default Pin States I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( PCAL6416_CONFIG_REG0 ); //Send Command Byte (Reg Address) ret &= I2C_WrByte( PCAL6416_CONFIG_VAL0 ); //Init Data Direction of GPIO ret &= I2C_WrByte( PCAL6416_CONFIG_VAL1 ); //Init Data Direction of GPIO I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( PCAL6416_PULLENB_REG0 ); //Send Command Byte (Reg Address) ret &= I2C_WrByte( PCAL6416_PULLENB_VAL0 ); //Init Port Pull-Up/Down Enable ret &= I2C_WrByte( PCAL6416_PULLENB_VAL1 ); //Init Port Pull-Up/Down Enable I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); //ret &= PCAL6416_WritePortDefaults(); //Init GPIO Outputs to Default State if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } int PCAL6416_WritePortDefaults( void ) { int ret; I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( PCAL6416_OUTPUT_PORT0 ); //Send Command Byte (Reg Address) ret &= I2C_WrByte( PCAL6416_OUTPUT_VAL0 ); //Output Port0 Default Pin States I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } int PCAL6416_ReadPort(uchar Port, uchar *Data) { int ret; I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( Port ); //Send Command Byte I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_RD ); //Send Slave Addr to Rd I2C_RdByte( Data ); I2C_WrNak(); I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } int PCAL6416_ReadPorts(uchar Port0, uchar *Data0, uchar *Data1) { int ret; I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( Port0 ); //Send Command Byte (Reg0 address associates with Data0 data) I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_RD ); //Send Slave Addr to Rd I2C_RdByte( Data0 ); I2C_WrAck(); I2C_RdByte( Data1 ); I2C_WrNak(); I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } int PCAL6416_WritePort(uchar Port, uchar Data) { int ret; if( (Port != PCAL6416_OUTPUT_PORT0) && (Port != PCAL6416_OUTPUT_PORT1) ) return( ERROR ); I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( Port ); //Send Command Byte (GPIO Address) ret &= I2C_WrByte( Data ); //Send Data (GPIO Data) I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } int PCAL6416_WritePortBit(uchar Port, uchar Bitval, uchar State) { uchar Data; int ret; if( (Port != PCAL6416_OUTPUT_PORT0) && (Port != PCAL6416_OUTPUT_PORT1) ) return( ERROR ); if( (State != HIGH) && (State != LOW) ) return( ERROR ); I2C_Select( I2C_BUS_SYS ); I2C_Start(); //I2C Start (S) ret = I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( Port-PCAL6416_RD_OFFSET ); //Send Command Byte (Offset Passed Output Port/Reg Addr to Matching Input Port/Reg Addr) I2C_Start(); //I2C Restart (Sr) ret &= I2C_WrByte( PCAL6416_ADDR_RD ); //Send Slave Addr to Rd I2C_RdByte( &Data ); I2C_WrNak(); I2C_Stop(); //I2C Stop (P) if( State == HIGH ) Data |= Bitval; else Data &= ~Bitval; I2C_Start(); //I2C Start (S) ret &= I2C_WrByte( PCAL6416_ADDR_WR ); //Send Slave Addr to Wr ret &= I2C_WrByte( Port ); //Send Command Byte (GPIO Address) ret &= I2C_WrByte( Data ); //Send Data (GPIO Data) I2C_Stop(); //I2C Stop (P) I2C_Select( I2C_BUS_DISABLE ); if( ret != I2C_ACK ) //If device ACK'd every transmitted byte, then we're in good shape ret = ERROR; return( ret ); //Return I2C Transfer Status } void PCAL6416_Reset( void ) { RegIO_SetBit( SYS_I2C_RST ); Delay500us(); RegIO_ClrBit( SYS_I2C_RST ); Delay500us(); }