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MatrixSPI.cpp@6:dd675b967b60, 2014-06-02 (annotated)
- Committer:
- tim003
- Date:
- Mon Jun 02 15:35:11 2014 +0000
- Revision:
- 6:dd675b967b60
- Parent:
- 3:43648fa57d55
LIE26
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
tim003 | 2:e4d483d82cd8 | 1 | #include "MatrixSPI.h" |
tim003 | 2:e4d483d82cd8 | 2 | |
tim003 | 2:e4d483d82cd8 | 3 | void MatrixSPI::setup () { |
tim003 | 2:e4d483d82cd8 | 4 | // initiation of the max 7219 |
tim003 | 2:e4d483d82cd8 | 5 | // SPI setup: 8 bits, mode 0 |
tim003 | 2:e4d483d82cd8 | 6 | max72_spi.format(8, 0); |
tim003 | 2:e4d483d82cd8 | 7 | |
tim003 | 2:e4d483d82cd8 | 8 | // going by the datasheet, min clk is 100ns so theoretically 10MHz should work... |
tim003 | 2:e4d483d82cd8 | 9 | // max72_spi.frequency(10*MHZ); |
tim003 | 2:e4d483d82cd8 | 10 | |
tim003 | 2:e4d483d82cd8 | 11 | sendSingle(scanLimit, 0x07); |
tim003 | 2:e4d483d82cd8 | 12 | sendSingle(decodeMode, 0x00); // using an led matrix (not digits) |
tim003 | 2:e4d483d82cd8 | 13 | sendSingle(shutdown, 0x01); // not in shutdown mode |
tim003 | 2:e4d483d82cd8 | 14 | sendSingle(displayTest, 0x00); // no display test |
tim003 | 2:e4d483d82cd8 | 15 | for (int e=1; e<=8; e++) { // empty registers, turn all LEDs off |
tim003 | 2:e4d483d82cd8 | 16 | sendSingle(e,0); |
tim003 | 2:e4d483d82cd8 | 17 | } |
tim003 | 2:e4d483d82cd8 | 18 | sendSingle(intensity, 0x0f & 0x0f); // the first 0x0f is the value you can set |
tim003 | 2:e4d483d82cd8 | 19 | // range: 0x00 to 0x0f |
tim003 | 3:43648fa57d55 | 20 | } |
tim003 | 3:43648fa57d55 | 21 | void MatrixSPI::sendSingle(int reg, int data) { |
tim003 | 3:43648fa57d55 | 22 | load = LOW; // begin |
tim003 | 3:43648fa57d55 | 23 | max72_spi.write(reg); // specify register |
tim003 | 3:43648fa57d55 | 24 | max72_spi.write(data); // put data |
tim003 | 3:43648fa57d55 | 25 | load = HIGH; // make sure data is loaded (on rising edge of LOAD/CS) |
tim003 | 3:43648fa57d55 | 26 | } |
tim003 | 3:43648fa57d55 | 27 | |
tim003 | 3:43648fa57d55 | 28 | void MatrixSPI::sendCol(int col, int data) { |
tim003 | 3:43648fa57d55 | 29 | sendSingle(col + 1, data); |
tim003 | 3:43648fa57d55 | 30 | } |