Diff: main.cpp

Revision:

1:77d25d0f67d6

Parent:

0:723ec6d615c7

Child:

2:e8d2b1992e9f

--- a/main.cpp	Tue Feb 22 17:25:26 2011 +0000
+++ b/main.cpp	Mon Mar 28 18:58:54 2016 +0000
@@ -29,7 +29,7 @@
  * In this example there are 4 DAC chips daisy-chained on the SPI bus,
  * which together provide 8 channels.
  */
-const int ndacs = 4;
+const int ndacs = 1;
 const int nchans = ndacs * 2;
 
 /*
@@ -40,8 +40,8 @@
  * p14, p15, p16, p17 - CS pins, each connected to a separate DAC.
  * p21 - LDAC pin, connected to all DAC chips.
  */
-PinName cspins[] = {(p14),(p15),(p16),(p17)};
-MCP4822A MCP(ndacs, p11, p13, cspins, p21);    // MOSI, SCLK, nCS-list, nLdac
+PinName cspins[] = {(D9)};
+MCP4822A MCP(ndacs, D11, D13, cspins, D10);    // MOSI, SCLK, nCS-list, nLdac
 
 int main() {
     int i, buffer;
@@ -53,37 +53,20 @@
     printf("Loading all channels with 1000mV at gain 2...\r\n");
     MCP.latch_disable();
     for (i=0; i<ndacs; i++) {
-        MCP.writeA2(i, 1000);
-        MCP.writeB2(i, 1000);
+        MCP.writeA2(i, 2520);
+        MCP.writeB2(i, 2520);
     }
     wait(4);
     printf("Latching now.\n");
     MCP.latch_enable();
     wait(4);
 
-    // Initialise an array of test voltages (in mV).
-    int test_voltages[nchans];
-    for (i=0; i<nchans; i++) {
-        test_voltages[i] = i * 500;
-    }
+
 
     while (1) {
+for (float i = 0; i < 6.28; i=i+.1)  {
+        MCP.writeA2(0, 1500+sin(i)*1500);
+}
 
-        // Write the array of test voltages to the DACs
-        // (at gain 2 with automatic latching).
-        printf("Writing: ");
-        for (i=0; i<nchans; i++) {
-            printf("%d ", test_voltages[i]);
-        }
-        printf("\r\n");
-        MCP.write(nchans, test_voltages, 2, 1);
-        wait(4);
-
-        //Move the values in the array along one place.
-        buffer = test_voltages[0];
-        for (i=0; i<(nchans-1); i++) {
-            test_voltages[i] = test_voltages[i+1];
-        }
-        test_voltages[nchans-1] = buffer;
     }
 }
\ No newline at end of file