MSP430 I2C commands

MSP430 I2C address: (hex)0x23, (decimal)35
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MSP430 command set index
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0 - SET_RTC_PARAMS   - setRTC()         - Set Realtime Clock
1 - GET_RTC_PARAMS   - getRTC()         - Get Realtime Clock
2 - GET_IR_DATA      - getIRData()      - Get Infrared Data Array
3 - GET_IR_VALUE     - getIRVal()       - Get last Infrared Value
4 - GET_INPUT_STATE  - getInputState()  - Get the Input state of pins
5 - GET_EVENT        - getEvent()       - Get outstanding events
6 - SET_OUTPUT_STATE - setOutputState() - Set the Output state of pins




Command (0): setRTC() - Set Realtime Clock
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> I2C Write (9 bytes)
    [0] = 9             ; Message length
    [1] = 0             ; Command index
    [2] = year (LSB)    ; ( in hex ) i.e. 2006 -> 0x2006 ( LSB=0x06 )
    [3] = year (MSB)    ; ( in hex ) i.e. 2006 -> 0x2006 ( MSB=0x20 )
    [4] = month         ; ( in hex ) i.e. Dec. -> 0x12
    [5] = day           ; ( in hex ) i.e. 31st -> 0x31
    [6] = hour          ; ( in hex ) i.e. 12   -> 0x12
    [7] = minute        ; ( in hex ) i.e. 30'  -> 0x30
    [8] = second        ; ( in hex ) i.e  45"  -> 0x45

> Wait 100 us.

> Done.




Command (1): getRTC() - Get Realtime Clock
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> I2C Write (2 bytes)
    [0] = 2             ; Message length
    [1] = 1             ; Command index

> Wait 100 us.

> I2C Read (9 bytes)
    [0] = 9             ; Message length
    [1] = 1             ; Command index
    [2] = year (LSB)    ; ( in hex ) i.e. 2006 -> 0x2006 ( LSB=0x06 )
    [3] = year (MSB)    ; ( in hex ) i.e. 2006 -> 0x2006 ( MSB=0x20 )
    [4] = month         ; ( in hex ) i.e. Dec. -> 0x12
    [5] = day           ; ( in hex ) i.e. 31st -> 0x31
    [6] = hour          ; ( in hex ) i.e. 12   -> 0x12
    [7] = minute        ; ( in hex ) i.e. 30'  -> 0x30
    [8] = second        ; ( in hex ) i.e  45"  -> 0x45

> Wait 100 us.

> Done.




Command (2): getIRData() - Get entire Infrared buffer
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> I2C Write 2 bytes
    [0] = 2                 ; Message length
    [1] = 2                 ; Command index

> Wait 100 us.

> I2C Read [variable length]
    [0] = message length    ; Message length
    [1] = 2                 ; Command index
    [2] = 1st IR value (LSB)
    [3] = 1st IR value (MSB)
    [4] = 2nd IR value (LSB)
    [5] = 2nd IR value (MSB)
    [6] = 3rd IR value (LSB)
    [7] = 3rd IR value (MSB)
    ...

> Wait 100 us.

> Done.




Command (3): getIRVal() - Get last Infrared value
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> I2C Write 2 bytes
    [0] = 2             ; Message length
    [1] = 3             ; Command index

> Wait 100 us.

> I2C Read 4 bytes
    [0] = 4             ; Message length
    [1] = 3             ; Command index
    [2] = IR value (LSB)
    [3] = IR value (MSB)

> Wait 100 us.

> Done.




Command (4): getInputState() - Get port 2 and port 3 input state
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> I2C Write 2 bytes
    [0] = 2             ; Message length
    [1] = 4             ; Command index

> Wait 100 us.

> I2C Read 4 bytes
    [0] = 4             ; Message length
    [1] = 4             ; Command index
    [2] = P2 state      ; Bit 4: CF CD.2   ( 1: No Card )( 0: Card Found )
                        ; Bit 3: CF CD.1   ( 1: No Card )( 0: Card Found )
                        ; Bit 2: MS/Pro CD ( 1: No Card )( 0: Card Found )
                        ; Bit 1: SD/MMC CD ( 1: No Card )( 0: Card Found )
    [3] = P3 state      ; Bit 6: SD/MMC WP ( 1: WP on )  ( 0: WP off )
                        ; Bit 2: xD CD     ( 1: No Card )( 0: Card Found )
                        ; Bit 1: SM CD     ( 1: No Card )( 0: Card Found )

> Wait 100 us.

> Done.




Command (5): getEvent() - Get outstanding events
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> I2C Write 2 bytes
    [0] = 2             ; Message length
    [1] = 5             ; Command index

> Wait 100 us.

> I2C Read 4 bytes
    [0] = 3             ; Message length
    [1] = 5             ; Command index
    [2] = Events        ; ( 1: State Change )
                        ; ( 2: IR Data )

> Wait 100 us.

> Done.




Command (6): setOutputState() - Set port 2 and port3 output state
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> I2C Write 4 bytes
    [0] = 4             ; Message length
    [1] = 6             ; Command index
    [2] = P2 state      ; All bits are ignored
    [3] = P3 state      ; Bit 3: CF_PWR_ON ( 1: POWER ON ) ( 0: POWER OFF )
                        ; Bit 0: SM_CE     ( 1: SM CE OFF )( 0: SM CE ON )

> Wait 100 us.

> Done.