' ********************************************************************** ' ** Program name: REE.BAS - Version : 1.2 - 31 January 2001 ** ' ** Compiler : BASCOM AVR, (IDE V.1.11.4.0, LIB 1.11.4.0) ** ' ** Board : K51-AVR ** ' ** Firm: grifo(r) ITALIAN TECHNOLOGY ** ' ** Via Dell' Artigiano 8/6 40016 San Giorgio di Piano (BO) ** ' ** Tel.+39 051 892 052 Fax +39 051 893 661 ** ' ** http://www.grifo.com http://www.grifo.it ** ' ** sales@grifo.it tech@grifo.it grifo@grifo.it ** ' ** ** ' ** Written by: Graziano GAIBA ** ' ********************************************************************** ' ' This program allows to read a serial EEPROM on IC4 (max 24c08), with ' addresses ranging from &H400 to &H7ff, addresses from &H0 to &H0FF ' are taken by IC7 (RTC PCF8583) while addresses from &H100 to &H3FF ' are free space. ' At start the program shows the address where to write, through keys ' T1 and T2 the value in incremented or decremented. ' Through key T3 the address is accepted and the value read at such ' address is shown. ' Whenever a key is pressed, an acoustic signal is emitted. ' '*********************************************************************** ' '********************* Compiler Directives ***************************** ' ' $regfile = "8515def.dat" ' AT90s8515 registers $romstart = &H0 ' code start address $crystal = 5529600 ' micro clock frequence $baud = 19200 ' baud rate Config Debounce = 50 ' time to wait to convalidate ' a key pressed ' Es: 10= 10ms, 50= 50ms ' ' *************************** PIN list AT90s8515 ************************** Config Sda = Portd.6 ' Pin 19 DATA signal for I2CBUS Config Scl = Portd.7 ' Pin 18 Clock signal for I2CBUS T1 Alias Pinb.0 ' Pin 17 connected to key T1 Config Pinb.0 = Input T2 Alias Pinb.1 ' Pin 16 connected to key T2 Config Pinb.1 = Input T3 Alias Pinb.2 ' Pin 15 connected to key T3 Config Pinb.2 = Input Buz Alias Portd.5 ' Pin 9 connected to Buzzer Config Pind.5 = Output ' '********************* Constants declaration *************************** ' Const Saa1064 = &H38 ' Slave address SAA1064 Const Wsaa1064 = &H70 ' Slave address SAA1064 in Write Const Rsaa1064 = &H71 ' Slave address SAA1064 in Read ' ********************* Addresses list for Saa1064 *********************** Const Ctb = 0 ' Ind. Control byte Const Dig1 = 1 ' Ind. Digit 1 Const Dig2 = 2 ' Ind. Digit 2 Const Dig3 = 3 ' Ind. Digit 3 Const Dig4 = 4 ' Ind. Digit 4 ' ' ********************************************************************** ' Const Wee = &HA0 ' Slave address 24cXX in Write Const Ree = &HA1 ' Slave address 24cXX in Read ' ' ********************************************************************** ' Const R = 1 ' value to read from EEPROM Const W = 0 ' value to write to EEPROM ' '*********************** Variables declaration ************************* ' Dim Dig As Byte ' value of a digit Dim Cifh As Byte ' 4 bit high in HEX for figure Dim Cifl As Byte ' 4 bit low in HEX for figure Dim Nb As Byte ' byte for DY3 and DY4 Dim Nw As Word ' word for DY1, DY2, DY3 and DY4 Dim Ind As Word ' 16 Bits address for I2CBUS etc. Dim W_r As Byte ' select write or read using R and W Dim Hind As Byte ' byte Hight of Ind Dim Lind As Byte ' byte Low of Ind Dim Valore As Byte ' generic use Dim X As Byte ' value read Dim Cifra As Byte ' Generic use ' '********************** Procedure declarations ************************* ' Declare Sub Iniz ' Peripherals initialization Declare Sub Cifre (valore As Byte , Cifh As Byte , Cifl As Byte ) ' converts a number in 2 HEX figures Declare Function Digit (dig As Byte ) As Byte ' Converts a number in range 0-F in 7 segments Declare Sub Vis_byte (nb As Byte) ' Shows a byte in HEX Declare Sub Vis_word (nw As Word) ' Shows a word in HEX Declare Sub I2cbus (ind As Word , Valore As Byte , Byval W_r As Byte) ' Reads/Writes to I2CBUS ' '****************************** Main program ****************************** ' Main: ' Delay for signals settling Waitms 1 Call Iniz ' initializations Ind = &H400 ' address of IC4 Do Call Vis_word(ind) ' show address Debounce T1 , 0 , Inc_ind , Sub ' if pressed increment Ind Debounce T2 , 0 , Dec_ind , Sub ' if pressed decrement Ind Loop Until T3 = 0 ' exit the loop if T3 pressed Buz = 0 ' turn on the buzzer Waitms 50 ' delay Bitwait T3 , Set ' wait for T3 released Buz = 1 ' turn off the buzzer Call I2cbus(ind , Valore , R) ' read the value from I2cBUS X = Valore ' save the value Do Call Vis_byte(x) ' show value to write Wait 1 ' delay 1 second Call Vis_word(ind) ' show address Wait 1 ' delay 1 second Loop ' loop forever Inc_ind: Buz = 0 ' turn on the buzzer Waitms 50 ' delay Incr Ind ' increment Ind Buz = 1 ' turn off the buzzer Return Dec_ind: Buz = 0 ' turn on the buzzer Waitms 50 ' delay Decr Ind ' decrement Ind Buz = 1 ' turn off the buzzer Return End ' '**************************** Program end ****************************** ' ' '**************************** Procedures ******************************* ' ' ********************** Peripherals initialization ******************** ' This procedure performs all the system initializations. ' Parameters: ' Input : nothing ' Output : nothing ' ************************************************************************ ' Sub Iniz ' Peripherals initialization Buz = 1 ' Silents the buzzer Do I2creceive Rsaa1064 , Valore ' Read the status register Loop Until Valore = 0 ' Wait for SAA1064 to turn on I2cstart ' Start sequence for I2CBUS I2cwbyte Wsaa1064 ' Communicate the Slave address I2cwbyte Ctb ' Point to control register I2cwbyte &B00100111 ' bit0 =1 dynamic mode ' bit1 =1 digit 1+3 not blanked ' bit2 =1 digit 2+4 not blanked ' bit3 =0 no test segment ' bit4 =0 no 3mA segment current ' bit5 =1 6mA segment current ' bit6 =0 no 12mA segment current ' bit7 =0 indifferente I2cwbyte 0 ' sets DY1 off I2cwbyte 0 ' sets DY2 off I2cwbyte 0 ' sets DY3 off I2cwbyte 0 ' sets DY4 off I2cstop End Sub ' ' ************* Reads from/Writes to I2CBUS ****************************** ' This procedure reads from or writes to I2CBUS in the addresses range ' from &H000 to &H7FF on IC4 (EEPROM 24cxx) or IC7 (RTC PCF8583). ' Parameters: ' Input : Ind as words, contains the device's address ' Valore as byte, value to write ' W_R as byte, = 0 writes, = 1 reads. ' Uses 2 global variables : Hind and Lind type Byte. ' Output : Valore as byte, value read. ' ******************************************************************* ' Sub I2cbus(ind As Word , Valore As Byte , W_r As Byte) ' Reads from/Writes to I2CBUS Hind = High(ind) ' store the high byte Lind = Low(ind) ' store the low byte Hind = Hind And 7 ' mask the 3 low bits ' clr c ' reset carry Rotate Hind , Left , 1 ' left shift of 1 bit Hind = Hind Or Wee ' sum slave address with writing If W_r = 0 Then ' check if must read or write I2cstart ' Start sequence for I2CBUS I2cwbyte Hind ' Communicate the Slave address I2cwbyte Lind ' address of EEPROM I2cwbyte Valore ' value to write I2cstop ' Stop sequence for I2CBUS Waitms 10 ' delay of 10ms needed by the ' EEPROM after each writing Else I2cstart ' Start sequence for I2CBUS I2cwbyte Hind ' Communicate the Slave address I2cwbyte Lind ' address of EEPROM Hind = Hind Or Ree ' sum slave address with reading I2cstart ' Repeat start sequence for I2CBUS I2cwbyte Hind ' Communicate the Slave address I2crbyte Valore , Nack ' read value I2cstop ' Stop sequence for I2CBUS End If End Sub ' ' *********** Converts a figure in range from 0 to F in 7 segments ***** ' This procedure converts a figure in range from 0 to F in 7 segments format, if ' value is greater than F the display is off. ' Parameters: ' Input : dig as byte, value from 0 to F ' Output : dig as byte, value in 7 segments format. ' ************************************************************************ ' Function Digit (dig As Byte ) As Byte ' Converts a number in range 0-F in 7 segments If Dig < 16 Then ' number is lower than 16 Digit = Lookup(dig , Tab_7seg) ' read value in table Else Digit = 0 ' if = 16 or greater reset End If End Function ' ' ***************** Converts 1 byte in two HEX figures ******************** ' This procedure converts 1 byte in range from 0 to 255 in two 4 bits hexadecimal ' figures. ' Parameters: ' Input : Valore as byte, value in the range from 0 to 255 ' Output : Cifh as byte, figure of high nibble ' Cifl as byte, figure of low nibble ' ************************************************************************ ' Sub Cifre (valore As Byte , Cifh As Byte , Cifl As Byte ) ' converts a number in two HEX figures Cifh = Valore And &HF0 ' mask 4 high bits Cifh = Cifh / 16 ' shift to low the 4 high bits Cifl = Valore And &H0F ' mask the 4 low bits End Sub ' ' *********************** Visualizes a byte in HEX ********************** ' This procedure allows to show a byte in hexadecimal format. ' E.g.: 255= FFH, 32= 20H etc. ' Parameters: ' Input : Nb as byte, figure to show in HEX format ' Output : nothing ' ************************************************************************ ' Sub Vis_byte (nb As Byte) ' visualizes a byte in HEX I2cstart ' Start sequence for I2CBUS I2cwbyte Wsaa1064 ' slave address I2cwbyte Dig1 ' point to display 1 (DY1) I2cwbyte 0 ' DY1 off I2cwbyte 0 ' DY2 off Call Cifre(nb , Cifh , Cifl) ' convert number in 2 HEX figures Cifra = Digit(cifh) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY3 Cifra = Digit(cifl) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY4 I2cstop ' Stop sequence for I2CBUS End Sub ' ' *********************** Visualizes a Word in HEX ********************** ' The first two displays (DY1 and DY2) show the high byte, while the last two ' show the low byte (DY3 and DY4). ' This procedure allows to show a Word in hexadecimal format. ' E.g.: 65535= FFFFH, 257= 101H etc. ' Parameters: ' Input : Nw as word, number to visualize in HEX ' Nb as byte, stores high byte or low byte of Nw ' Output : nothing ' ************************************************************************ ' Sub Vis_word (nw As Word) ' visualizes a byte in HEX I2cstart ' Start sequence for I2CBUS I2cwbyte Wsaa1064 ' slave address I2cwbyte Dig1 ' point to display 1 (DY1) Nb = High(nw) Call Cifre(nb , Cifh , Cifl) ' convert number in 2 HEX figures Cifra = Digit(cifh) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY1 Cifra = Digit(cifl) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY2 Nb = Low(nw) Call Cifre(nb , Cifh , Cifl) ' convert number in 2 HEX figures Cifra = Digit(cifh) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY3 Cifra = Digit(cifl) ' convert the figure in 7 segments I2cwbyte Cifra ' output to display DY4 I2cstop ' Stop sequence for I2CBUS End Sub ' ' ' ************* Conversion table for 7 segments figure in the range from 0 to 15 ******* Tab_7seg: ' num. 0 1 2 3 4 5 6 7 8 9 Data &H3F , &H06 , &H5B , &H4F , &H66 , &H6D , &H7D , &H07 , &H7F , &H6F ' num. A b C d E F Data &H77 , &H7C , &H39 , &H5E , &H79 , &H71 ' ************************************************************************************** '