Revision 0:2ac336d8094b, committed 2016-08-24

Comitter:

adambalkan

Date:

Wed Aug 24 06:48:09 2016 +0000

Commit message:

code for testing 6172

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice.lib	Wed Aug 24 06:48:09 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/USBDevice/#5bf05f9b3c7b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Aug 24 06:48:09 2016 +0000
@@ -0,0 +1,158 @@
+// This is the code for the RENBED microcontroller board which is connected to the LMAB Measurement Board V1.0
+// RENISHAW d.o.o.
+// ab138110; adam.balkan@renishaw.com
+// August 2016
+
+#include "mbed.h"
+#include "USBSerial.h"
+
+USBSerial pc;                           // For talking to the PC
+SPI dac_adc_link(P1_22, P1_21, P1_20);  // MOSI, MISO, SCLK  (for talking to the DAC)
+DigitalOut DAC_CS(P1_26);               // CS (chip select) for selecting the DAC        
+DigitalInOut OEb(P1_14);                // Output enable active low
+DigitalInOut LE(P0_17);                 // Latch enable active low
+DigitalInOut PDb(P0_7);                 // Power down active low
+
+char command = 0x00;                    // stores the command that was sent from the PC
+char param_p1 = 0x00;                   // stores the first "parameter" byte from the PC
+char param_p2 = 0x00;                   // stores the second "parameter" byte from the PC
+char param_p3 = 0x00;                   // stores the third "parameter" byte from the PC
+char param_p4 = 0x00;                   // stores the fourth "parameter" byte from the PC
+    
+void Disconnect_PDb()
+{
+  PDb.input();              // by connecting PDb as an input, we effectively make it "open"
+  PDb.mode(PullNone);       // we need to make sure that there is no pull-up or pull down resistor on PDb when it is open
+}
+
+void Disconnect_OEb()
+{
+   OEb.input();             // by connecting OEb as an input, we effectively make it "open"
+   OEb.mode(PullNone);      // we need to make sure that there is no pull-up or pull down resistor on OEb when it is open    
+}
+
+void Disconnect_LE()
+{
+  LE.input();               // by connecting LE as an input, we effectively make it "open"
+  LE.mode(PullNone);        // we need to make sure that there is no pull-up or pull-down resistor on LE when it is open
+}
+
+void Connect_PDb()
+{
+  PDb.output();             // to re-connect PDb we configure it as an output
+}
+
+void Connect_OEb()
+{
+   OEb.output();            // to re-connect OEb we configure it as an output
+}
+
+void Connect_LE()
+{
+  LE.output();              // to re-connect LE we configure it as an output
+}
+
+
+void send_analog_data_to_pc(char id, char data1, char data2)
+{
+        pc.putc(id);      // ID of analog output
+        pc.putc(data1);   // Part 1 of analog output       
+        pc.putc(data2);   // Part 2 of analog output
+        pc.putc(13);      // Carriage return
+        wait_ms(100);
+}
+
+
+void SET_ASIC_VDD(int desired_value) // sets ASIC VDD using DAC MCP4921
+{
+      
+        char command_register_msb = (0x70);                                 // 01110000 for DAC A, BUF, Gain =1  and no shutdown
+        command_register_msb = ((command_register_msb)|desired_value>>8);   // assign first 4 bits to first byte to send
+        char command_register_lsb = desired_value;                          // assign last 8 bits to second byte to send
+        DAC_CS =0;                                                          // bring CS low
+        int junk= dac_adc_link.write(command_register_msb);                 // write first byte
+        junk= dac_adc_link.write(command_register_lsb);                     // write second byte
+        DAC_CS=1;                                                           // De-select device 
+        wait_ms(100);                                                       // wait for 100 ms
+}
+
+
+int main() {
+     dac_adc_link.format(8,0);                  // Specify that the SPI link to the DAC should be 8 bits long and be in mode 0     
+     Connect_PDb();                             // On start-up, connect PDb
+     Connect_LE();                              // On start-up, connect LE
+     Connect_OEb();                             // On start-up, connect OEb
+     PDb = 1;                                   // Power down is inactive on start up
+     LE = 1;                                    // Latch enable is disabled on start up
+     OEb = 0;                                   // Output enable is enabled on start up
+     DAC_CS = 1;                                // DAC is deselected on start-up     
+        
+    while(1) {
+
+        if (pc.readable()){             // If the PC has sent a command to the Renbed...
+
+        command = pc.getc();    // Data from PC (command) (the first byte)
+        param_p1 = pc.getc();   // Data from PC (param p1) (the second byte)
+        param_p2 = pc.getc();   // Data from PC (param p2)  (the third byte)
+        param_p3 = pc.getc();   // Data from PC (param p2) (the fourth byte)
+        param_p4 = pc.getc();   // Data from PC (param p2) (the fifth byte)
+        int scrap = pc.getc();    // Carriage Return (the sixth byte) (we scrap this byte)
+  
+        if (command=='E') // request to change ASIC VDD
+        {
+        int desired_value = 256*param_p3+param_p4; // represents desired ASIC VDD as an integer between 0 (0V) and 4096 (5V) for example 2703 is 3.3 volts
+        SET_ASIC_VDD(desired_value);
+        send_analog_data_to_pc('E', 0x00,  0x00); // lower part followed by upper part
+        }
+        else if (command=='Z') // toggle PDb
+        {
+        PDb = !PDb;
+        send_analog_data_to_pc('Z',  0x00,  0x00); // lower part followed by upper part
+        }
+        else if (command=='X') // toggle latch enable
+        {
+        LE =!LE;
+        send_analog_data_to_pc('X',  0x00,  0x00); // lower part followed by upper part
+        }
+        else if (command=='C') // toggle output enable
+        {
+        OEb = !OEb;
+        send_analog_data_to_pc('C', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='O')  // Disconnect PDb (make it open)
+        {
+        Disconnect_PDb();
+        send_analog_data_to_pc('O', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='F')  // Disconnect OEb (make it open)
+        {
+        Disconnect_OEb();
+        send_analog_data_to_pc('F', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='W')  // Disconnect LE (make it open)
+        {
+        Disconnect_LE();
+        send_analog_data_to_pc('W', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='o')  // Connect PDb 
+        {
+        Connect_PDb();
+        send_analog_data_to_pc('o', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='f')  // Connect OEb
+        {
+        Connect_OEb();
+        send_analog_data_to_pc('f', 0x00, 0x00); // lower part followed by upper part
+        }
+        else if (command=='w')  // Connect LE
+        {
+        Connect_LE();
+        send_analog_data_to_pc('w', 0x00, 0x00); // lower part followed by upper part
+        }
+        else
+        {
+        pc.printf("Invalid command\n");     // if an unrecognised command was sent from the PC
+        }
+      } 
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Aug 24 06:48:09 2016 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9327015d4013
\ No newline at end of file