62 lines
2.1 KiB
Plaintext
62 lines
2.1 KiB
Plaintext
#######################################################
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# ### ### #
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# ### EPICS Database for ### #
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# ### I2C PCF8591 board ### #
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# ### ### #
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# ### author: B. Carvalho IPFN ### #
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# ### ### #
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# ### Ref 2.0; 2019-10-14 ### #
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# ### ### #
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# ### macros: ID I2C address of ADC ### #
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# ### Description: ### #
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# ### This is an example DB file using ### #
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# ### stream(asynI2C) to read/write ### #
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# ### an PCF8591 ADDA chip ### #
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#######################################################
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#####################################################
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# Read/Write pcf8591 register @ address 0x48=d72 ### #
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#####################################################
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record( mbboDirect, "$(P)$(R)PCF8591:72:CTRLREGISTER") {
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field( DTYP, "stream")
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field( OUT, "@pcf8591.proto wReg(72) I2C")
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field( SHFT, "0")
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field( NOBT, "8")
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field(VAL, 255)
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field(PINI,"YES")
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}
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# Receiving two bytes. last one counts
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record( longin, "$(P)$(R)PCF8591:72:ADC_CH1" ) {
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field(DTYP, "stream")
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field(INP, "@pcf8591.proto rConvAdc0(72) I2C")
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# field( FLNK, "$(P)$(R)PCF8591:72:CHANNEL1" )
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}
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record( calc, "$(P)$(R)PCF8591:72:BYTE2_CH1" ) {
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field( INPA, "$(P)$(R)PCF8591:72:ADC_CH1 PP NMS")
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# extract LSB =last byte received
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field( CALC, " A & 255 " )
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}
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record( ai, "$(P)$(R)PCF8591:72:CHANNEL1" ) {
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field( INP, "$(P)$(R)PCF8591:72:ADC_CH1 PP NMS")
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field( SCAN, "1 second")
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field( ASLO, "0.02" )
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field( AOFF, "0" )
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field( EGU, "V" )
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field( PREC, "3" )
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field( HOPR, "5.0" )
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field( LOPR, "0.0" )
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}
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record( longin, "$(P)$(R)PCF8591:72:ADC_CH2" ) {
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field(DTYP, "stream")
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field(INP, "@pcf8591.proto rConvAdc1(72) I2C")
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#field( FLNK, "
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}
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record( calc, "$(P)$(R)PCF8591:72:BYTE2_CH2" ) {
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field( INPA, "$(P)$(R)PCF8591:72:ADC_CH2 PP NMS")
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field(SCAN, "1 second")
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# LSB i=last byte received
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field( CALC, " A & 255 " )
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}
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