Arduino reads AD7780 24bit ADC

Projects Networking, Protocols, and Devices
5

Hi,
now it looks better. I'm only able to check the status byte due to my unfinished hardware, but the status byte reacts on different settings, so i guess it's right.

What was wrong?
First: I haven't set my ports correctly (output ports as output and input ports as inputs).
Second: @el_supremo your change of delay and rising/ falling clock was correct - may thanks!

So this is a simple code which can read the AD7780 and prints the result including the status byte (24bit result + 8bit status):

#define AD7780_VCC 30		// Give AD7780 5V or not
#define AD7780_PWDOWN 28	// Reset/ Power down pin -> High is on
#define AD7780_FILTER 18
#define AD7780_GAIN 19		// Gain on/ off LOW = GAIN = 128/ HIGH = GAIN = 1
#define AD7780_SCK 7		// Clock
#define AD7780_MISO 6		// MISO
#define AD7780_MOSI 5		// MOSI

void setup()
{
	Serial1.begin(9600);
	Serial1.println("Start...");
	pinMode(AD7780_VCC, OUTPUT);
	pinMode(AD7780_PWDOWN, OUTPUT);
	pinMode(AD7780_SCK, OUTPUT);	// SCK is output
	pinMode(AD7780_FILTER, OUTPUT);
	pinMode(AD7780_GAIN, OUTPUT);
	pinMode(AD7780_MISO, INPUT);	// MISO ist read
	digitalWrite(AD7780_VCC, HIGH);			// AD7080 VCC on
	digitalWrite(AD7780_PWDOWN, LOW);		// AD7080 in Standby
	digitalWrite(AD7780_FILTER, HIGH);
	digitalWrite(AD7780_GAIN, LOW);
	Serial1.println("AD7780 initialisation finnished");
}

void loop()
{
Serial1.println("Start reading data");
	delay(100);

digitalWrite(AD7780_SCK, HIGH);				// Clock high from Arduino
delay(100);

digitalWrite(AD7780_PWDOWN, HIGH);			// AD7080 Turn on	

	while(digitalRead(AD7780_MISO)==HIGH);	// Wait until AD7780 sets RDY LOW
	Serial1.println("MISO turned low Measuring is finnished, and we get the result");
int a = 0;

 for(int i=0; i< 32; i++)
 {
	 digitalWrite(AD7780_SCK, LOW);
	 delayMicroseconds(10);
	 digitalWrite(AD7780_SCK, HIGH);
	 a = digitalRead(AD7780_MISO);
	 Serial1.print(a);
	 delayMicroseconds(10);
 }

Serial1.println("");
digitalWrite(AD7780_PWDOWN, LOW);    // AD7080 Turn off	
}

One more question:
Is there an easy way of extracting the fist 24-result-bits into a single number and the 8-status-bits into an other single number?

Thanky you!