Diff: main.cpp

Revision:

0:644d21a11da3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 02 06:55:21 2016 +0000
@@ -0,0 +1,92 @@
+#include "mbed.h"
+#include "USBSerial.h"
+
+USBSerial pc;
+
+DigitalOut ASIC_CS(P0_2);
+DigitalOut CNV_ADC(P1_26);
+
+
+
+
+
+SPI ASIC(P0_9, P0_8, P1_29);//MOSI, MISO, SCLK
+SPI ADC(P1_22, P1_21, P1_20);// MOSI, MISO, SCLK //ADC LTC2311-16
+
+
+int sixteen_bit_result;
+int ASIC_SPI_REGISTER;
+char command, p1, p2, p3, p4;
+void variable_defaults()
+{
+   ASIC_SPI_REGISTER = (0x0000);
+   ASIC_CS=1;
+   CNV_ADC=1;
+}
+
+
+int READ_ADC() // sets the value of MCP4922 DAC channel A
+{
+        int response= ADC.write(0); // write byte
+        return response;
+}
+
+
+void Send_ASIC_SPI(char to_send)
+{
+    ASIC_CS=0;
+    int junk = ASIC.write(to_send);
+    ASIC_CS=1;
+}
+
+int main() {
+    variable_defaults();
+    ASIC.format(8, 1);// the ASIC should operate in SPI mode 1
+    ADC.format(16, 2);// the ADC should operate in SPI mode 3
+    
+    while(1) {
+        if (pc.readable()){
+        command = pc.getc();   // Data from PC (command)
+        p1 = pc.getc();   // Data from PC (param p1)
+        p2 = pc.getc();   // Data from PC (param p2)
+        p3 = pc.getc();   // Data from PC (param p2)
+        p4 = pc.getc();   // Data from PC (param p2)
+        int scrap = pc.getc();    // Carriage Return
+
+        if (command=='A') // update ASIC SPI REGISTER
+        {
+         ASIC_SPI_REGISTER=0x0000; //clear register
+         ASIC_SPI_REGISTER = ASIC_SPI_REGISTER|p2<<16;
+         ASIC_SPI_REGISTER = ASIC_SPI_REGISTER|p3<<8;
+         ASIC_SPI_REGISTER = ASIC_SPI_REGISTER|p4;
+         Send_ASIC_SPI((p2));
+         Send_ASIC_SPI((p3));
+         Send_ASIC_SPI((p4));
+        // pc.printf("%d\n",ASIC_SPI_REGISTER);
+        // pc.printf("%d\n",0xff&(ASIC_SPI_REGISTER>>16));
+        // pc.printf("%d\n",0xff&(ASIC_SPI_REGISTER>>8));
+        // pc.printf("%d\n",0xff&(ASIC_SPI_REGISTER));
+        }
+        else if (command=='a') // read adc value
+        {
+         pc.printf("%d,%d\n",(sixteen_bit_result>>8)&0xff,(sixteen_bit_result&0xff));
+        }
+
+      }  
+      else
+      {
+          //CNV_ADC=0;
+         // wait_us(100);
+        // pc.printf("reading adc...\n");   
+         //sixteen_bit_result = 0;
+        CNV_ADC=1;
+        //wait_us(1);
+        CNV_ADC=0;
+        sixteen_bit_result = ADC.write(0);
+        //wait_us(1);
+        CNV_ADC=1;
+        //ADC.format(16, 0);// the ADC should operate in SPI mode
+          }
+          
+    }
+}