Kod:
/*
SCP1000 Barometric Pressure Sensor Display
Shows the output of a Barometric Pressure Sensor on a
Uses the SPI library. For details on the sensor, see:
http://www.sparkfun.com/commerce/product_info.php?products_id=8161
http://www.vti.fi/en/support/obsolete_products/pressure_sensors/
This sketch adapted from Nathan Seidle's SCP1000 example for PIC:
http://www.sparkfun.com/datasheets/Sensors/SCP1000-Testing.zip
Circuit:
SCP1000 sensor attached to pins 6, 7, 10 - 13:
DRDY: pin 6
CSB: pin 7
MOSI: pin 11
MISO: pin 12
SCK: pin 13
created 31 July 2010
modified 14 August 2010
by Tom Igoe
*/
// the sensor communicates using SPI, so include the library:
#include <SPI.h>
//Sensor's memory register addresses:
const int PRESSURE = 0x1F; //3 most significant bits of pressure
const int PRESSURE_LSB = 0x20; //16 least significant bits of pressure
const int TEMPERATURE = 0x21; //16 bit temperature reading
const byte READ = 0b11111100; // SCP1000's read command
const byte WRITE = 0b00000010; // SCP1000's write command
// pins used for the connection with the sensor
// the other you need are controlled by the SPI library):
const int dataReadyPin = 6;
const int chipSelectPin = 7;
void setup() {
Serial.begin(9600);
// start the SPI library:
SPI.begin();
// initalize the data ready and chip select pins:
pinMode(dataReadyPin, INPUT);
pinMode(chipSelectPin, OUTPUT);
//Configure SCP1000 for low noise configuration:
writeRegister(0x02, 0x2D);
writeRegister(0x01, 0x03);
writeRegister(0x03, 0x02);
// give the sensor time to set up:
delay(100);
}
void loop() {
//Select High Resolution Mode
writeRegister(0x03, 0x0A);
// don't do anything until the data ready pin is high:
if (digitalRead(dataReadyPin) == HIGH) {
//Read the temperature data
int tempData = readRegister(0x21, 2);
// convert the temperature to celsius and display it:
float realTemp = (float)tempData / 20.0;
Serial.print("Temp[C]=");
Serial.print(realTemp);
//Read the pressure data highest 3 bits:
byte pressure_data_high = readRegister(0x1F, 1);
pressure_data_high &= 0b00000111; //you only needs bits 2 to 0
//Read the pressure data lower 16 bits:
unsigned int pressure_data_low = readRegister(0x20, 2);
//combine the two parts into one 19-bit number:
long pressure = ((pressure_data_high << 16) | pressure_data_low) / 4;
// display the temperature:
Serial.println("\tPressure [Pa]=" + String(pressure));
}
}
//Read from or write to register from the SCP1000:
unsigned int readRegister(byte thisRegister, int bytesToRead ) {
byte inByte = 0; // incoming byte from the SPI
unsigned int result = 0; // result to return
Serial.print(thisRegister, BIN);
Serial.print("\t");
// SCP1000 expects the register name in the upper 6 bits
// of the byte. So shift the bits left by two bits:
thisRegister = thisRegister << 2;
// now combine the address and the command into one byte
byte dataToSend = thisRegister & READ;
Serial.println(thisRegister, BIN);
// take the chip select low to select the device:
digitalWrite(chipSelectPin, LOW);
// send the device the register you want to read:
SPI.transfer(dataToSend);
// send a value of 0 to read the first byte returned:
result = SPI.transfer(0x00);
// decrement the number of bytes left to read:
bytesToRead--;
// if you still have another byte to read:
if (bytesToRead > 0) {
// shift the first byte left, then get the second byte:
result = result << 8;
inByte = SPI.transfer(0x00);
// combine the byte you just got with the previous one:
result = result | inByte;
// decrement the number of bytes left to read:
bytesToRead--;
}
// take the chip select high to de-select:
digitalWrite(chipSelectPin, HIGH);
// return the result:
return(result);
}
//Sends a write command to SCP1000
void writeRegister(byte thisRegister, byte thisValue) {
// SCP1000 expects the register address in the upper 6 bits
// of the byte. So shift the bits left by two bits:
thisRegister = thisRegister << 2;
// now combine the register address and the command into one byte:
byte dataToSend = thisRegister | WRITE;
// take the chip select low to select the device:
digitalWrite(chipSelectPin, LOW);
SPI.transfer(dataToSend); //Send register location
SPI.transfer(thisValue); //Send value to record into register
// take the chip select high to de-select:
digitalWrite(chipSelectPin, HIGH);
}
tu jest przykładowy odczyt spi dalej trzeba kombinować po usuwać co nie potrzebne i dopisac swoje
Kod:
/*********For Minidriver Board**************************
* attention - to digital pin 6 (simulate SS pin)
PB2 - PWM_R
* command - to digital pin 11 (MOSI pin)
* data - to digital pin 12 (MISO pin)
* clock - to digital pin 13 (SCK pin)
__MISO___MOSI_____________________SS________SCK_______
\ data command X | ground 3.3V attention | clock X X /
--12-----11------------------------6--------13------
********************************************************/
#include <SPI.h>
const int slaveSelectPin = 6;
unsigned char PS2buf[10];
unsigned char i;
void setup()
{
Serial.begin(9600);
Serial.println("Inization...");
pinMode(slaveSelectPin,OUTPUT);
digitalWrite(slaveSelectPin,HIGH);
SPI.begin();
SPI.setBitOrder(LSBFIRST); //LSBFIRST or MSBFIRST
SPI.setDataMode(SPI_MODE3); //CPOL=1 CPHA=1
SPI.setClockDivider(SPI_CLOCK_DIV64); //
delay(20);
Serial.println("Inizatin finished.");
}
void loop()
{
if(Get_PS2Dat(PS2buf))
for(i=0;i<9;i++)
{
Serial.print(PS2buf[i]);
}
Serial.println();
delay(250);
}
unsigned char PS2_RWByte(unsigned char dat)
{
SPI.transfer(dat);
//while(!(SPSR&0x80));
return(SPDR);
}
unsigned char Get_PS2Dat(unsigned char *buf)
{
unsigned char i;
digitalWrite(slaveSelectPin,LOW);
delayMicroseconds(15);
buf[0]=PS2_RWByte(0x01);delayMicroseconds(15);
buf[1]=PS2_RWByte(0x42);delayMicroseconds(15);
buf[2]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[3]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[4]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[5]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[6]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[7]=PS2_RWByte(0x00);delayMicroseconds(15);
buf[8]=PS2_RWByte(0x00);delayMicroseconds(15);
digitalWrite(slaveSelectPin,HIGH);
if((buf[0]==0xff)&&(buf[1]==0x41)&&(buf[2]==0x5a))
return 1;
if((buf[0]==0xff)&&(buf[1]==0x73)&&(buf[2]==0x5a))
return 2;
return 0;
}
przykładowa obsługa pada
Uruchomiłem zwykłego pada na kabel sieczko się łączy z arduino niebawem dojdzie mi ten z twojego liku jak uda się mi go obsłużyć podam przykładowy program
