add new dot correction method
Fork of TLC5940 by
TLC5940.cpp@0:ead2ebe1dc77, 2011-12-11 (annotated)
- Committer:
- suupen
- Date:
- Sun Dec 11 00:24:02 2011 +0000
- Revision:
- 0:ead2ebe1dc77
- Child:
- 1:be9daf113060
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
suupen | 0:ead2ebe1dc77 | 1 | //========================================================== |
suupen | 0:ead2ebe1dc77 | 2 | // |
suupen | 0:ead2ebe1dc77 | 3 | // TLC5940.cpp |
suupen | 0:ead2ebe1dc77 | 4 | // TLC5940(Texas Instruments 16 channel led driver with dot correction and grayscale pwm control) |
suupen | 0:ead2ebe1dc77 | 5 | // http://datasheet.octopart.com/TLC5940NT-Texas-Instruments-datasheet-121738.pdf |
suupen | 0:ead2ebe1dc77 | 6 | //========================================================== |
suupen | 0:ead2ebe1dc77 | 7 | #define _TLC5940_C |
suupen | 0:ead2ebe1dc77 | 8 | |
suupen | 0:ead2ebe1dc77 | 9 | #include "types.h" |
suupen | 0:ead2ebe1dc77 | 10 | #include "mbed.h" |
suupen | 0:ead2ebe1dc77 | 11 | #include "TLC5940.h" |
suupen | 0:ead2ebe1dc77 | 12 | |
suupen | 0:ead2ebe1dc77 | 13 | |
suupen | 0:ead2ebe1dc77 | 14 | |
suupen | 0:ead2ebe1dc77 | 15 | |
suupen | 0:ead2ebe1dc77 | 16 | /** DC motor direct drive object connected to the specified DigtalOutput pin |
suupen | 0:ead2ebe1dc77 | 17 | */ |
suupen | 0:ead2ebe1dc77 | 18 | TLC5940::TLC5940(PinName mosi, PinName miso, PinName sck, PinName xlat, PinName blank, PinName vprg, uint8_t cascade) : |
suupen | 0:ead2ebe1dc77 | 19 | _spi(mosi, miso, sck), _xlat(xlat), _blank(blank), _vprg(vprg){ |
suupen | 0:ead2ebe1dc77 | 20 | |
suupen | 0:ead2ebe1dc77 | 21 | _xlat = 0; |
suupen | 0:ead2ebe1dc77 | 22 | _blank = 0; |
suupen | 0:ead2ebe1dc77 | 23 | _vprg = 0; |
suupen | 0:ead2ebe1dc77 | 24 | |
suupen | 0:ead2ebe1dc77 | 25 | D_cascade = cascade; |
suupen | 0:ead2ebe1dc77 | 26 | |
suupen | 0:ead2ebe1dc77 | 27 | tlc5940DotCorrection(); |
suupen | 0:ead2ebe1dc77 | 28 | tlc5940SpiInitalize(); |
suupen | 0:ead2ebe1dc77 | 29 | tlc5940GrayDataClear(); |
suupen | 0:ead2ebe1dc77 | 30 | } |
suupen | 0:ead2ebe1dc77 | 31 | |
suupen | 0:ead2ebe1dc77 | 32 | /****************************************************************************** |
suupen | 0:ead2ebe1dc77 | 33 | Name : TLC5940 dot correction initalize |
suupen | 0:ead2ebe1dc77 | 34 | Parameters : none |
suupen | 0:ead2ebe1dc77 | 35 | Returns : nothing |
suupen | 0:ead2ebe1dc77 | 36 | Description: |
suupen | 0:ead2ebe1dc77 | 37 | ******************************************************************************/ |
suupen | 0:ead2ebe1dc77 | 38 | void TLC5940::tlc5940DotCorrection(void) { |
suupen | 0:ead2ebe1dc77 | 39 | _vprg = 1; |
suupen | 0:ead2ebe1dc77 | 40 | _spi.format(6,0); |
suupen | 0:ead2ebe1dc77 | 41 | _spi.frequency(Z_clockFrequency); |
suupen | 0:ead2ebe1dc77 | 42 | |
suupen | 0:ead2ebe1dc77 | 43 | |
suupen | 0:ead2ebe1dc77 | 44 | // _vprg = 1; |
suupen | 0:ead2ebe1dc77 | 45 | |
suupen | 0:ead2ebe1dc77 | 46 | for (int i = 0; i < (16 * D_cascade); i++) { |
suupen | 0:ead2ebe1dc77 | 47 | int whoami = _spi.write(Z_dotCorrection); |
suupen | 0:ead2ebe1dc77 | 48 | } |
suupen | 0:ead2ebe1dc77 | 49 | |
suupen | 0:ead2ebe1dc77 | 50 | _xlat = 1; |
suupen | 0:ead2ebe1dc77 | 51 | _xlat = 0; |
suupen | 0:ead2ebe1dc77 | 52 | } |
suupen | 0:ead2ebe1dc77 | 53 | |
suupen | 0:ead2ebe1dc77 | 54 | /****************************************************************************** |
suupen | 0:ead2ebe1dc77 | 55 | Name : SPI Initalize (for TLC5960 control) |
suupen | 0:ead2ebe1dc77 | 56 | Parameters : none |
suupen | 0:ead2ebe1dc77 | 57 | Returns : nothing |
suupen | 0:ead2ebe1dc77 | 58 | Description: |
suupen | 0:ead2ebe1dc77 | 59 | ******************************************************************************/ |
suupen | 0:ead2ebe1dc77 | 60 | void TLC5940::tlc5940SpiInitalize(void) { |
suupen | 0:ead2ebe1dc77 | 61 | _spi.format(12,0); |
suupen | 0:ead2ebe1dc77 | 62 | _spi.frequency(Z_clockFrequency); |
suupen | 0:ead2ebe1dc77 | 63 | |
suupen | 0:ead2ebe1dc77 | 64 | _vprg = 0; |
suupen | 0:ead2ebe1dc77 | 65 | } |
suupen | 0:ead2ebe1dc77 | 66 | |
suupen | 0:ead2ebe1dc77 | 67 | /****************************************************************************** |
suupen | 0:ead2ebe1dc77 | 68 | Name : TLC5940 Gray Data clear |
suupen | 0:ead2ebe1dc77 | 69 | Parameters : none |
suupen | 0:ead2ebe1dc77 | 70 | Returns : nothing |
suupen | 0:ead2ebe1dc77 | 71 | Description: |
suupen | 0:ead2ebe1dc77 | 72 | ******************************************************************************/ |
suupen | 0:ead2ebe1dc77 | 73 | void TLC5940::tlc5940GrayDataClear(void) { |
suupen | 0:ead2ebe1dc77 | 74 | |
suupen | 0:ead2ebe1dc77 | 75 | _vprg = 0; |
suupen | 0:ead2ebe1dc77 | 76 | |
suupen | 0:ead2ebe1dc77 | 77 | for (int i = 0; i < (16 * D_cascade); i++) { |
suupen | 0:ead2ebe1dc77 | 78 | int whoami = _spi.write(0); |
suupen | 0:ead2ebe1dc77 | 79 | } |
suupen | 0:ead2ebe1dc77 | 80 | |
suupen | 0:ead2ebe1dc77 | 81 | _xlat = 1; |
suupen | 0:ead2ebe1dc77 | 82 | _xlat = 0; |
suupen | 0:ead2ebe1dc77 | 83 | } |
suupen | 0:ead2ebe1dc77 | 84 | |
suupen | 0:ead2ebe1dc77 | 85 | /************************************** |
suupen | 0:ead2ebe1dc77 | 86 | * main |
suupen | 0:ead2ebe1dc77 | 87 | **************************************/ |
suupen | 0:ead2ebe1dc77 | 88 | void TLC5940::grayDataSetAndDisplay(uint16_t *data) { |
suupen | 0:ead2ebe1dc77 | 89 | |
suupen | 0:ead2ebe1dc77 | 90 | // *data = &D_grayScale[][] |
suupen | 0:ead2ebe1dc77 | 91 | // D_grayScale[cascade][16]; // [][0] = out0, [][1] = out1, ... ,[][14] = out15 |
suupen | 0:ead2ebe1dc77 | 92 | // [x][x].11,[x][x].10, ... ,[x][x].1,[x][x].0 = (xxxx xxxx xxxxb) 1gray scale data |
suupen | 0:ead2ebe1dc77 | 93 | |
suupen | 0:ead2ebe1dc77 | 94 | // [0][0] [0][1] [0][14] [0][15] [1][0] [1][1] [1][14] [1][15] [20][0] 20][1] [20][14] [20][15] |
suupen | 0:ead2ebe1dc77 | 95 | // | | ... | | | | ... | | | | ... | | |
suupen | 0:ead2ebe1dc77 | 96 | // ----------------------------------| ------------------------------------| ------------------------------------| |
suupen | 0:ead2ebe1dc77 | 97 | // | out0 1 ... 14 15 |-----------| out0 1 ... 14 15 |-----......------| out0 1 ... 14 15 | |
suupen | 0:ead2ebe1dc77 | 98 | // |TLC5940 (cascade = 1) | |TLC5940 (cascade = 2) | |TLC5940 (cascade = 21) | |
suupen | 0:ead2ebe1dc77 | 99 | // ----------------------------------- ------------------------------------- ------------------------------------- |
suupen | 0:ead2ebe1dc77 | 100 | // |
suupen | 0:ead2ebe1dc77 | 101 | |
suupen | 0:ead2ebe1dc77 | 102 | |
suupen | 0:ead2ebe1dc77 | 103 | int8_t x; // display data no x 0 - 15 |
suupen | 0:ead2ebe1dc77 | 104 | |
suupen | 0:ead2ebe1dc77 | 105 | #define Z_GSCLKNUM (340) // GRAYSCALE PWM sousin yo clock 4096(PWM) / 12bit(sousin) = 341 |
suupen | 0:ead2ebe1dc77 | 106 | #define Z_GRAYDATA (16 * D_cascade) |
suupen | 0:ead2ebe1dc77 | 107 | |
suupen | 0:ead2ebe1dc77 | 108 | |
suupen | 0:ead2ebe1dc77 | 109 | _blank = 1; |
suupen | 0:ead2ebe1dc77 | 110 | _blank = 0; |
suupen | 0:ead2ebe1dc77 | 111 | |
suupen | 0:ead2ebe1dc77 | 112 | |
suupen | 0:ead2ebe1dc77 | 113 | |
suupen | 0:ead2ebe1dc77 | 114 | |
suupen | 0:ead2ebe1dc77 | 115 | _vprg = 0; |
suupen | 0:ead2ebe1dc77 | 116 | |
suupen | 0:ead2ebe1dc77 | 117 | for(int i = 0; i < (Z_GSCLKNUM - Z_GRAYDATA); i++){ |
suupen | 0:ead2ebe1dc77 | 118 | // grayscale pwm clock only |
suupen | 0:ead2ebe1dc77 | 119 | _spi.write(0); |
suupen | 0:ead2ebe1dc77 | 120 | } |
suupen | 0:ead2ebe1dc77 | 121 | |
suupen | 0:ead2ebe1dc77 | 122 | // grayscale pwm clock & color data clock |
suupen | 0:ead2ebe1dc77 | 123 | // green data send |
suupen | 0:ead2ebe1dc77 | 124 | for(uint8_t C_cascade = 1; C_cascade <= D_cascade; C_cascade++){ |
suupen | 0:ead2ebe1dc77 | 125 | for(x = 0; x < 16; x++){ |
suupen | 0:ead2ebe1dc77 | 126 | _spi.write((uint16_t)*(data + (16 * (D_cascade - C_cascade)) + (15 - x))); |
suupen | 0:ead2ebe1dc77 | 127 | } |
suupen | 0:ead2ebe1dc77 | 128 | } |
suupen | 0:ead2ebe1dc77 | 129 | |
suupen | 0:ead2ebe1dc77 | 130 | |
suupen | 0:ead2ebe1dc77 | 131 | _xlat = 1; |
suupen | 0:ead2ebe1dc77 | 132 | _xlat = 0; |
suupen | 0:ead2ebe1dc77 | 133 | |
suupen | 0:ead2ebe1dc77 | 134 | } |
suupen | 0:ead2ebe1dc77 | 135 | |
suupen | 0:ead2ebe1dc77 | 136 |