| 0,0 → 1,51 |
|---|
| #include "WProgram.h" |
| #include "Spi.h" |
| |
| //---------- constructor ---------------------------------------------------- |
| |
| SPI::SPI() |
| { |
| // initialize the SPI pins |
| pinMode(SCK_PIN, OUTPUT); |
| pinMode(MOSI_PIN, OUTPUT); |
| pinMode(MISO_PIN, INPUT); |
| pinMode(SS_PIN, OUTPUT); // <------- !!! (Remember! This pin will select USB host chip Max3421) |
| |
| // enable SPI Master, MSB, SPI mode 0, FOSC/4 |
| mode(0); |
| } |
| |
| //------------------ mode --------------------------------------------------- |
| |
| void SPI::mode(byte config) |
| { |
| byte tmp; |
| |
| // enable SPI master with configuration byte specified |
| SPCR = 0; |
| SPCR = (config & 0x7F) | (1<<SPE) | (1<<MSTR); |
| tmp = SPSR; |
| tmp = SPDR; |
| } |
| |
| //------------------ transfer ----------------------------------------------- |
| |
| byte SPI::transfer(byte value) |
| { |
| SPDR = value; |
| while (!(SPSR & (1<<SPIF))) ; |
| return SPDR; |
| } |
| |
| byte SPI::transfer(byte value, byte period) |
| { |
| SPDR = value; |
| if (period > 0) delayMicroseconds(period); |
| while (!(SPSR & (1<<SPIF))) ; |
| return SPDR; |
| } |
| |
| |
| //---------- preinstantiate SPI object -------------------------------------- |
| |
| SPI Spi = SPI(); |