Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1702 | - | 1 | #include "WProgram.h" |
2 | #include "Spi.h" |
||
3 | |||
4 | //---------- constructor ---------------------------------------------------- |
||
5 | |||
6 | SPI::SPI() |
||
7 | { |
||
8 | // initialize the SPI pins |
||
9 | pinMode(SCK_PIN, OUTPUT); |
||
10 | pinMode(MOSI_PIN, OUTPUT); |
||
11 | pinMode(MISO_PIN, INPUT); |
||
12 | pinMode(SS_PIN, OUTPUT); // <------- !!! (Remember! This pin will select USB host chip Max3421) |
||
13 | |||
14 | // enable SPI Master, MSB, SPI mode 0, FOSC/4 |
||
15 | mode(0); |
||
16 | } |
||
17 | |||
18 | //------------------ mode --------------------------------------------------- |
||
19 | |||
20 | void SPI::mode(byte config) |
||
21 | { |
||
22 | byte tmp; |
||
23 | |||
24 | // enable SPI master with configuration byte specified |
||
25 | SPCR = 0; |
||
26 | SPCR = (config & 0x7F) | (1<<SPE) | (1<<MSTR); |
||
27 | tmp = SPSR; |
||
28 | tmp = SPDR; |
||
29 | } |
||
30 | |||
31 | //------------------ transfer ----------------------------------------------- |
||
32 | |||
33 | byte SPI::transfer(byte value) |
||
34 | { |
||
35 | SPDR = value; |
||
36 | while (!(SPSR & (1<<SPIF))) ; |
||
37 | return SPDR; |
||
38 | } |
||
39 | |||
40 | byte SPI::transfer(byte value, byte period) |
||
41 | { |
||
42 | SPDR = value; |
||
43 | if (period > 0) delayMicroseconds(period); |
||
44 | while (!(SPSR & (1<<SPIF))) ; |
||
45 | return SPDR; |
||
46 | } |
||
47 | |||
48 | |||
49 | //---------- preinstantiate SPI object -------------------------------------- |
||
50 | |||
51 | SPI Spi = SPI(); |