A B / Mbed 2 deprecated 6243_ASIC

6243_ASIC PCB code as of 02092016

Dependencies:   USBDevice mbed

Files at this revision

API Documentation at this revision

Revision 0:dfbf890fb03a, committed 2016-09-02

Comitter:
adambalkan
Date:
Fri Sep 02 06:56:13 2016 +0000
Commit message:
6243 ASIC PCB code, as of 02092016

Changed in this revision

USBDevice.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
diff -r 000000000000 -r dfbf890fb03a USBDevice.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice.lib	Fri Sep 02 06:56:13 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/USBDevice/#5bf05f9b3c7b

diff -r 000000000000 -r dfbf890fb03a main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 02 06:56:13 2016 +0000
@@ -0,0 +1,184 @@
+#include "mbed.h"
+#include "USBSerial.h"
+
+USBSerial pc;
+
+DigitalOut ASIC_CS(P0_2);
+DigitalOut DAC_CS(P1_26);
+DigitalOut DAC_LDAC(P1_14);
+DigitalOut DAC_SHDN(P1_15);
+DigitalInOut PD_CHA(P0_21);
+
+
+AnalogIn DAC_OUT_A(P0_11);
+AnalogIn DAC_OUT_B(P0_12);
+AnalogIn OUT_N(P0_13);
+AnalogIn OUT_P(P0_14);
+AnalogIn BG_BUF(P0_15);
+AnalogIn PHOTO_DIODE(P0_22);
+
+PwmOut SWITCH(P1_24); // shorts the op-amp feedback network when high 24
+//PwmOut EXTCLK(P1_25); // can be used to apply an external clock to the ASIC if needed (need to solder to P0_20 (if actually required) due to mistake)
+
+SPI ASIC(P0_9, P0_8, P1_29);//MOSI, MISO, SCLK
+SPI DAC(P1_22, P1_21, P1_20);// MOSI, MISO, SCLK
+
+int ASIC_SPI_REGISTER;
+char command, p1, p2, p3, p4;
+void variable_defaults()
+{
+   ASIC_SPI_REGISTER = (0x0000);
+   ASIC_CS=1;
+   DAC_CS=1;
+   DAC_LDAC=0;
+   DAC_SHDN=0; //Disable DAC
+   PD_CHA.input();
+   PD_CHA.mode(PullNone);
+}
+
+void connect_PD_CHA(int value)//connect power down and drive to value
+{
+   PD_CHA.output();
+   PD_CHA = value; 
+}
+
+void disable_DAC()
+{
+    DAC_SHDN=0;
+}
+
+void disconnect_PD_CHA()
+{
+   PD_CHA.input();
+   PD_CHA.mode(PullNone);
+}
+
+int Set_DAC_A(int desired_value_A) // sets the value of MCP4922 DAC channel A
+{
+       // int desired_value_A = (voutA/3.3)*4096;
+       DAC_SHDN=1; //Enable DAC
+        char command_register_msb = (0x70);// 01110000 for DAC A, BUF, Gain =1  and no shutdown
+        command_register_msb = ((command_register_msb)|desired_value_A>>8); // assign first 4 bits to first byte to send
+        char command_register_lsb = desired_value_A; // assign last 8 bits to second byte to send
+        DAC_CS =0; // bring CS low
+        int junk= DAC.write(command_register_msb); // write first byte
+        junk= DAC.write(command_register_lsb); // write second byte
+        DAC_CS=1;                               // De-select device 
+        return 1;
+}
+
+int Set_DAC_B(int desired_value_B) // sets the value of MCP4922 DAC channel B
+{
+       // int desired_value_B = (voutB/3.3)*4096;
+       DAC_SHDN=1; //Enable DAC
+        char command_register_msb = (0xF0);// 11110000 for DAC B, BUF, Gain =1  and no shutdown
+        command_register_msb = ((command_register_msb)|desired_value_B>>8); // assign first 4 bits to first byte to send
+        char command_register_lsb = desired_value_B; // assign last 8 bits to second byte to send
+        DAC_CS =0; // bring CS low
+        int junk= DAC.write(command_register_msb); // write first byte
+        junk= DAC.write(command_register_lsb); // write second byte
+        DAC_CS=1;                               // De-select device 
+        return 1;
+}
+
+void Send_ASIC_SPI(char to_send)
+{
+    ASIC_CS=0;
+    int junk = ASIC.write(to_send);
+    ASIC_CS=1;
+}
+
+void ExternalClock(float duty_cycle, int period_us)
+{
+    //EXTCLK.write(duty_cycle);
+   // EXTCLK.period_us(period_us);
+}
+
+void SWITCH_SET(float duty_cycle, int period_us)
+{
+    SWITCH.write(duty_cycle);
+    SWITCH.period_us(period_us);
+}
+
+int main() {
+    variable_defaults();
+    Set_DAC_A(0);
+    Set_DAC_B(0);
+    ExternalClock(0.0, 1000);
+    SWITCH_SET(10,255);
+    ASIC.format(8, 1);// the ASIC should operate in SPI mode 1
+  //  PHOTODIODE.mode(PullNone);
+    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') // set vouta of DAC
+        {
+        int desired_value = ((0x0f)&p3)<<8;
+        desired_value = desired_value|p4;    
+        Set_DAC_A(desired_value);
+       // pc.printf("%d\n",desired_value);
+        }
+        else if (command=='b') // set voutb of DAC
+        {
+        int desired_value = ((0x0f)&p3)<<8;
+        desired_value = desired_value|p4;    
+        Set_DAC_B(desired_value);
+        }
+        else if(command=='C')// read all analog inputs
+        {
+        pc.printf("%f,%f,%f,%f,%f,%f\n", DAC_OUT_A.read(), DAC_OUT_B.read(), OUT_N.read(), OUT_P.read(), BG_BUF.read(), PHOTO_DIODE.read());
+        }
+        else if(command=='K')// set external clock
+        {
+        //   float duty_cycle = (float)p3/ (float)256; // duty cycle
+        //  int period_us = p4; //period in microseconds    
+        //  ExternalClock(duty_cycle, period_us);
+        // pc.printf("%f, %d, %d, %d, %d, %d\n", duty_cycle, period_us, p1, p2, p3, p4);
+        }
+        else if(command=='S')// set switching settings
+        {
+        float duty_cycle = (float)p3/ (float)256; // duty cycle
+        int period_us = p4; //period in microseconds    
+        SWITCH_SET(duty_cycle, period_us);
+       // pc.printf("%f, %d\n", duty_cycle, period_us);
+       // pc.printf("%f, %d, %d, %d, %d, %d\n", duty_cycle, period_us, p1, p2, p3, p4);
+        }        
+        else if(command=='P')
+        {
+            connect_PD_CHA(1);
+        }
+        else if(command=='p')
+        {
+            connect_PD_CHA(0);
+        }
+        else if(command=='O')
+        {
+            disconnect_PD_CHA();
+        }
+        else if(command=='d')
+        {
+          disable_DAC();  
+        }     
+      }  
+    }
+}

diff -r 000000000000 -r dfbf890fb03a mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Sep 02 06:56:13 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb
\ No newline at end of file