GLCD / OLED serial displays

**Scampy** · - 29th October 2015, 12:48

Up until now I've used 16 x 2 and 20 x 4 LCD displays in my projects. Recently I used a 128 x 64 GLCD which used a BV4615 daughter board which handled the drawing on the screen, and allowed the screen to be connected as a serial device, and made for easy code writing as the commands were no more complicated than using an LCD, eg:

Code:

serout2 portB.0, 84, ["Alarm Off"]

However I'm looking at using an I2c or SPI based display, and noticed that there is a nokia 3310 screen library for PBP. In that library it uses a lookup / lookdown table for the characters thus

Code:

Lcd_SendChar:
    lookdown Lcd_data,[" !\#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"],CharNum'[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"],CharNum
    Lcd_data = CharNum +32   
    sELECT CASE lcd_data
    Case 32                   
        FC(0)=$00:FC(1)=$00:FC(2)=$00:FC(3)=$00:FC(4)=$00 ' // sp
    Case 33                   
        FC(0)=$00:FC(1)=$00:FC(2)=$2f:FC(3)=$00:FC(4)=$00 ' // !
    Case 34                   
        FC(0)=$00:FC(1)=$07:FC(2)=$00:FC(3)=$07:FC(4)=$00 ' // " (use \)
    Case 35                   
        FC(0)=$14:FC(1)=$7f:FC(2)=$14:FC(3)=$7f:FC(4)=$14 ' // #
    Case 36                   
        FC(0)=$24:FC(1)=$2a:FC(2)=$7f:FC(3)=$2a:FC(4)=$12 ' // $
    Case 37                   
        FC(0)=$c4:FC(1)=$c8:FC(2)=$10:FC(3)=$26:FC(4)=$46 ' // %
    Case 38                   
        FC(0)=$36:FC(1)=$49:FC(2)=$55:FC(3)=$22:FC(4)=$50 ' // &
    Case 39                   
        FC(0)=$00:FC(1)=$05:FC(2)=$03:FC(3)=$00:FC(4)=$00 ' // '
    Case 40                   
        FC(0)=$00:FC(1)=$1c:FC(2)=$22:FC(3)=$41:FC(4)=$00 ' // (
    Case 41                   
        FC(0)=$00:FC(1)=$41:FC(2)=$22:FC(3)=$1c:FC(4)=$00 ' // )
    Case 42                   
        FC(0)=$14:FC(1)=$08:FC(2)=$3E:FC(3)=$08:FC(4)=$14 ' // *
    Case 43                   
        FC(0)=$08:FC(1)=$08:FC(2)=$3E:FC(3)=$08:FC(4)=$08 ' // +
    Case 44                   
        FC(0)=$00:FC(1)=$00:FC(2)=$50:FC(3)=$30:FC(4)=$00 ' // 
    Case 45                   
        FC(0)=$10:FC(1)=$10:FC(2)=$10:FC(3)=$10:FC(4)=$10 ' // -
    Case 46                   
        FC(0)=$00:FC(1)=$60:FC(2)=$60:FC(3)=$00:FC(4)=$00 ' // .
    Case 47                   
        FC(0)=$20:FC(1)=$10:FC(2)=$08:FC(3)=$04:FC(4)=$02 ' // /
    Case 48                   
        FC(0)=$3E:FC(1)=$51:FC(2)=$49:FC(3)=$45:FC(4)=$3E ' // 0
    Case 49                   
        FC(0)=$00:FC(1)=$42:FC(2)=$7F:FC(3)=$40:FC(4)=$00 ' // 1
    Case 50                   
        FC(0)=$42:FC(1)=$61:FC(2)=$51:FC(3)=$49:FC(4)=$46 ' // 2
    Case 51                   
        FC(0)=$21:FC(1)=$41:FC(2)=$45:FC(3)=$4B:FC(4)=$31 ' // 3
    Case 52                   
        FC(0)=$18:FC(1)=$14:FC(2)=$12:FC(3)=$7F:FC(4)=$10 ' // 4
    Case 53                   
        FC(0)=$27:FC(1)=$45:FC(2)=$45:FC(3)=$45:FC(4)=$39 ' // 5
    Case 54                   
        FC(0)=$3C:FC(1)=$4A:FC(2)=$49:FC(3)=$49:FC(4)=$30 ' // 6
    Case 55                   
        FC(0)=$01:FC(1)=$71:FC(2)=$09:FC(3)=$05:FC(4)=$03 ' // 7
    Case 56                   
        FC(0)=$36:FC(1)=$49:FC(2)=$49:FC(3)=$49:FC(4)=$36 ' // 8
    Case 57                   
        FC(0)=$06:FC(1)=$49:FC(2)=$49:FC(3)=$29:FC(4)=$1E ' // 9
    Case 58                   
        FC(0)=$00:FC(1)=$36:FC(2)=$36:FC(3)=$00:FC(4)=$00 ' // :
    Case 59                   
        FC(0)=$00:FC(1)=$56:FC(2)=$36:FC(3)=$00:FC(4)=$00 ' // ";"
    Case 60                   
        FC(0)=$08:FC(1)=$14:FC(2)=$22:FC(3)=$41:FC(4)=$00 ' // <
    Case 61                   
        FC(0)=$14:FC(1)=$14:FC(2)=$14:FC(3)=$14:FC(4)=$14 ' // =
    Case 62                   
        FC(0)=$00:FC(1)=$41:FC(2)=$22:FC(3)=$14:FC(4)=$08 ' // >
    Case 63                   
        FC(0)=$02:FC(1)=$01:FC(2)=$51:FC(3)=$09:FC(4)=$06 ' // ?
    Case 64                   
        FC(0)=$32:FC(1)=$49:FC(2)=$59:FC(3)=$51:FC(4)=$3E ' // @
    Case 65                   
        FC(0)=$7E:FC(1)=$11:FC(2)=$11:FC(3)=$11:FC(4)=$7E ' // A
    Case 66                   
        FC(0)=$7F:FC(1)=$49:FC(2)=$49:FC(3)=$49:FC(4)=$36 ' // B
    Case 67                   
        FC(0)=$3E:FC(1)=$41:FC(2)=$41:FC(3)=$41:FC(4)=$22 ' // C
    Case 68                   
        FC(0)=$7F:FC(1)=$41:FC(2)=$41:FC(3)=$22:FC(4)=$1C ' // D
    Case 69                   
        FC(0)=$7F:FC(1)=$49:FC(2)=$49:FC(3)=$49:FC(4)=$41 ' // E
    Case 70                   
        FC(0)=$7F:FC(1)=$09:FC(2)=$09:FC(3)=$09:FC(4)=$01 ' // F
    Case 71                   
        FC(0)=$3E:FC(1)=$41:FC(2)=$49:FC(3)=$49:FC(4)=$7A ' // G
    Case 72                   
        FC(0)=$7F:FC(1)=$08:FC(2)=$08:FC(3)=$08:FC(4)=$7F ' // H
    Case 73                   
        FC(0)=$00:FC(1)=$41:FC(2)=$7F:FC(3)=$41:FC(4)=$00 ' // I
    Case 74                   
        FC(0)=$20:FC(1)=$40:FC(2)=$41:FC(3)=$3F:FC(4)=$01 ' // J
    Case 75                   
        FC(0)=$7F:FC(1)=$08:FC(2)=$14:FC(3)=$22:FC(4)=$41 ' // K
    Case 76                   
        FC(0)=$7F:FC(1)=$40:FC(2)=$40:FC(3)=$40:FC(4)=$40 ' // L
    Case 77                   
        FC(0)=$7F:FC(1)=$02:FC(2)=$0C:FC(3)=$02:FC(4)=$7F ' // M
    Case 78                   
        FC(0)=$7F:FC(1)=$04:FC(2)=$08:FC(3)=$10:FC(4)=$7F ' // N
    Case 79                   
        FC(0)=$3E:FC(1)=$41:FC(2)=$41:FC(3)=$41:FC(4)=$3E ' // O
    Case 80                   
        FC(0)=$7F:FC(1)=$09:FC(2)=$09:FC(3)=$09:FC(4)=$06 ' // P
    Case 81                   
        FC(0)=$3E:FC(1)=$41:FC(2)=$51:FC(3)=$21:FC(4)=$5E ' // Q
    Case 82                   
        FC(0)=$7F:FC(1)=$09:FC(2)=$19:FC(3)=$29:FC(4)=$46 ' // R
    Case 83                   
        FC(0)=$46:FC(1)=$49:FC(2)=$49:FC(3)=$49:FC(4)=$31 ' // S
    Case 84                   
        FC(0)=$01:FC(1)=$01:FC(2)=$7F:FC(3)=$01:FC(4)=$01 ' // T
    Case 85                   
        FC(0)=$3F:FC(1)=$40:FC(2)=$40:FC(3)=$40:FC(4)=$3F ' // U
    Case 86                   
        FC(0)=$1F:FC(1)=$20:FC(2)=$40:FC(3)=$20:FC(4)=$1F ' // V
    Case 87                   
        FC(0)=$3F:FC(1)=$40:FC(2)=$38:FC(3)=$40:FC(4)=$3F ' // W
    Case 88                   
        FC(0)=$63:FC(1)=$14:FC(2)=$08:FC(3)=$14:FC(4)=$63 ' // X
    Case 89                   
        FC(0)=$07:FC(1)=$08:FC(2)=$70:FC(3)=$08:FC(4)=$07 ' // Y
    Case 90                   
        FC(0)=$61:FC(1)=$51:FC(2)=$49:FC(3)=$45:FC(4)=$43 ' // Z
'    Case 91                   
'        FC(0)=$00:FC(1)=$7F:FC(2)=$41:FC(3)=$41:FC(4)=$00 ' // [
'    Case 92                   
'        FC(0)=$02:FC(1)=$04:FC(2)=$08:FC(3)=$10:FC(4)=$20 ' // \  (we are using this for " above)
'    Case 93                   
'        FC(0)=$00:FC(1)=$41:FC(2)=$41:FC(3)=$7F:FC(4)=$00 ' // ]
'    Case 94                   
'        FC(0)=$04:FC(1)=$02:FC(2)=$01:FC(3)=$02:FC(4)=$04 ' // ^
'    Case 95                   
'        FC(0)=$40:FC(1)=$40:FC(2)=$40:FC(3)=$40:FC(4)=$40 ' // _
'    Case 96                   
'        FC(0)=$00:FC(1)=$01:FC(2)=$02:FC(3)=$04:FC(4)=$00 ' // '
'    Case 97                   
'        FC(0)=$20:FC(1)=$54:FC(2)=$54:FC(3)=$54:FC(4)=$78 ' // a
'    Case 98                   
'        FC(0)=$7F:FC(1)=$48:FC(2)=$44:FC(3)=$44:FC(4)=$38 ' // b
'    Case 99                   
'        FC(0)=$38:FC(1)=$44:FC(2)=$44:FC(3)=$44:FC(4)=$20 ' // c
'    Case 100                   
'        FC(0)=$38:FC(1)=$44:FC(2)=$44:FC(3)=$48:FC(4)=$7F ' // d
'    Case 101                   
'        FC(0)=$38:FC(1)=$54:FC(2)=$54:FC(3)=$54:FC(4)=$18 ' // e
'    Case 102                   
'        FC(0)=$08:FC(1)=$7E:FC(2)=$09:FC(3)=$01:FC(4)=$02 ' // f
'    Case 103                   
'        FC(0)=$0C:FC(1)=$52:FC(2)=$52:FC(3)=$52:FC(4)=$3E ' // g
'    Case 104                   
'        FC(0)=$7F:FC(1)=$08:FC(2)=$04:FC(3)=$04:FC(4)=$78 ' // h
'    Case 105                   
'        FC(0)=$00:FC(1)=$44:FC(2)=$7D:FC(3)=$40:FC(4)=$00 ' // i
'    Case 106                   
'        FC(0)=$20:FC(1)=$40:FC(2)=$44:FC(3)=$3D:FC(4)=$00 ' // j
'    Case 107                   
'        FC(0)=$7F:FC(1)=$10:FC(2)=$28:FC(3)=$44:FC(4)=$00 ' // k
'    Case 108                   
'        FC(0)=$00:FC(1)=$41:FC(2)=$7F:FC(3)=$40:FC(4)=$00 ' // l
'    Case 109                   
'        FC(0)=$7C:FC(1)=$04:FC(2)=$18:FC(3)=$04:FC(4)=$78 ' // m
'    Case 110                   
'        FC(0)=$7C:FC(1)=$08:FC(2)=$04:FC(3)=$04:FC(4)=$78 ' // n
'    Case 111                   
'        FC(0)=$38:FC(1)=$44:FC(2)=$44:FC(3)=$44:FC(4)=$38 ' // o
'    Case 112                   
'        FC(0)=$7C:FC(1)=$14:FC(2)=$14:FC(3)=$14:FC(4)=$08 ' // p
'    Case 113                   
'        FC(0)=$08:FC(1)=$14:FC(2)=$14:FC(3)=$18:FC(4)=$7C ' // q
'    Case 114                   
'        FC(0)=$7C:FC(1)=$08:FC(2)=$04:FC(3)=$04:FC(4)=$08 ' // r
'    Case 115                   
'        FC(0)=$48:FC(1)=$54:FC(2)=$54:FC(3)=$54:FC(4)=$20 ' // s
'    Case 116                   
'        FC(0)=$04:FC(1)=$3F:FC(2)=$44:FC(3)=$40:FC(4)=$20 ' // t
'    Case 117                   
'        FC(0)=$3C:FC(1)=$40:FC(2)=$40:FC(3)=$20:FC(4)=$7C ' // u
'    Case 118                   
'        FC(0)=$1C:FC(1)=$20:FC(2)=$40:FC(3)=$20:FC(4)=$1C ' // v
'    Case 119                   
'        FC(0)=$3C:FC(1)=$40:FC(2)=$30:FC(3)=$40:FC(4)=$3C ' // w
'    Case 120                    
'        FC(0)=$44:FC(1)=$28:FC(2)=$10:FC(3)=$28:FC(4)=$44 ' // x 
'    Case 121                    
'        FC(0)=$0C:FC(1)=$50:FC(2)=$50:FC(3)=$50:FC(4)=$3C ' // y 
'    Case 122                    
'        FC(0)=$44:FC(1)=$64:FC(2)=$54:FC(3)=$4C:FC(4)=$44 ' // z 
'    case 123
'        FC(0)=$00:FC(1)=$08:FC(2)=$36:FC(3)=$41:FC(4)=$00'  // {
'    case 124
'        FC(0)=$00:FC(1)=$00:FC(2)=$7F:FC(3)=$00:FC(4)=$00 ' // |
'    case 125
'        FC(0)=$00:FC(1)=$41:FC(2)=$36:FC(3)=$08:FC(4)=$00'  // }    
'    case 126
'        FC(0)=$10:FC(1)=$08:FC(2)=$08:FC(3)=$10:FC(4)=$08'  // ~
    'case 127
    '    FC(0)=$10:FC(1)=$08:FC(2)=$08:FC(3)=$10:FC(4)=$08'  // DEL        
    'Case 128
   '     FC(0)=$55:FC(1)=$2A:FC(2)=$55:FC(3)=$2A:FC(4)=$55 ' // 55 (shaded)
    end SELECT
Write_LCD:
    High Lcd_DC
    SHiftOUT Lcd_SDO , Lcd_CLK , MSBFIRST, [ FC(0),FC(1),FC(2),FC(3),FC(4),$00 ]
    Low Lcd_DC
    Return

I don't really understand the inner working of these screens, but could I use the above table on any OLED / TFT screen that uses the same protocol, or are the charater generation tables different for each device ?

**ruijc** · - 29th October 2015, 13:37

Hello Scampy,

Here is my advice...take a look at the library made by Richard here:

http://www.picbasic.co.uk/forum/showthread.php?t=20115

It is very good and it works great.

And you can use 2 types of displays ( with or without touch capability ) better than the traditional 3310 displays.

Regards
Rui

**Scampy** · - 29th October 2015, 13:55

Rui,

Thanks for the reply. The only problem is I'm running 2.60c so don't have the usercommand option that is a feature of PBP3.0

I have a nice 2.8 TFT colour display with 240x320 resolution and SPI interface that would be nice to work with

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