Revision 0:1bc0260fa422, committed 2018-12-06

Comitter:

JAgustinOtero

Date:

Thu Dec 06 00:08:12 2018 +0000

Commit message:

funciones para el generador de seniales

Changed in this revision

diff -r 000000000000 -r 1bc0260fa422 AD9833.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AD9833.cpp	Thu Dec 06 00:08:12 2018 +0000
@@ -0,0 +1,75 @@
+/////////////////////////////////////////////////////////////////////////
+// AD9833 control code
+// Create by Po-Cheng Chen 07-04-2014
+// Version 0.1
+/////////////////////////////////////////////////////////////////////////
+
+#include "mbed.h"
+#include "SPI.h"
+#include "DigitalOut.h"
+#include "AD9833.h"
+SPI AD9833_SPI(PTD6, PTD7, PTD5); //mosi, miso, sclk --> don't need MISO
+DigitalOut fSync(PTE1); //use p8 as FSync data pin (same as chip select)
+
+/////////////////////////////////////////////////////////////////////////
+// SPI initialization
+/////////////////////////////////////////////////////////////////////////
+void SPI_INITIALIZATION()
+{
+    //Setup the spi for 16 bit data, with 25MHz clock rate, mode 2
+    // Note: mBed is MSB first SPI protocol
+    AD9833_SPI.format(8,2);
+    AD9833_SPI.frequency(250000/*250000*/);
+    fSync = 1;
+    wait_ms(10);
+}
+/////////////////////////////////////////////////////////////////////////
+// SPI writing
+/////////////////////////////////////////////////////////////////////////
+void write_SPI(short dat,short dat2)
+{
+    fSync = 0;
+    AD9833_SPI.write(dat);
+    AD9833_SPI.write(dat2);
+    fSync = 1;
+}
+/////////////////////////////////////////////////////////////////////////
+// Set desired frequency
+// Comments:Calculate the desired frequency accrodingly
+//          Do it in Matlab or mBed?
+/////////////////////////////////////////////////////////////////////////
+void setFreq(long FREQ)
+{
+    int freq_MSB;   //define freq MSB reg value
+    int freq_LSB;   //define freq LSB reg value
+
+    long freq_cal;  //define freq calculated value
+    float freq_val = 0.00000000;    //define ferq calculate tempotary value
+
+    //calculate the frqe reg value
+    //((desired frequency)/(reference frequency)) x 0x10000000.
+    freq_val = (((float)(FREQ))/25000000);
+    freq_cal = freq_val*0x10000000;
+
+    freq_MSB = (int)((freq_cal & 0xFFFC000)>>14); // shift 14 bits
+    freq_LSB = (int)(freq_cal & 0x3FFF);
+
+    freq_MSB = freq_MSB | 0x4000;  //assign freq reg address
+    freq_LSB = freq_LSB | 0x4000;
+    ///////////////////////////////////////////////////////////////////////////////////
+  /*  //print the data from the serial port to verifiy the function
+    printf("freq_LSB 0x%x\n\r", freq_LSB);
+    //print the data from the serial port to verifiy the function
+    printf("freq_MSB 0x%x\n\r", freq_MSB);*/
+    ///////////////////////////////////////////////////////////////////////////////////
+    write_SPI(0x21 , 0x00);      //write control reg - apply reset
+          //write control reg - apply reset
+    write_SPI((freq_LSB & 0xFF00)>>8 , freq_LSB & 0x00FF);    //write freq reg - LSB
+        //write freq reg - LSB
+    write_SPI((freq_MSB & 0xFF00)>>8 , freq_MSB & 0x00FF);
+        //write freq reg - MSB
+    write_SPI(0xC0 , 0x00);      //write phase reg - 0 for now
+    
+    write_SPI(0x20 , 0x00);      //write control reg - disable reset
+    
+}
\ No newline at end of file

diff -r 000000000000 -r 1bc0260fa422 AD9833.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AD9833.h	Thu Dec 06 00:08:12 2018 +0000
@@ -0,0 +1,15 @@
+/*inicializa el SPI
+@param none
+@return none
+*/
+void SPI_INITIALIZATION(void);
+/*envia 2 tramas seguidas de 8 bits 
+@param 8 bits mas significativos, 8 bits menos significativos
+@return none
+*/
+void write_SPI(short dat,short dat2);
+/*envia la tramas necesarias para setear una frecuencia y fase deseadas
+@param frecuencia deseada
+@return none
+*/
+void setFreq(long FREQ);
\ No newline at end of file

diff -r 000000000000 -r 1bc0260fa422 README.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README.txt	Thu Dec 06 00:08:12 2018 +0000
@@ -0,0 +1,2 @@
+BIBLIOTECA DE FUNCIONES PARA LA GENERACION DE SEÑALES SENOIDALES
+SU ALTERACION PODRIA PROVOCAR UNA FALLA EN LA MEDICION DE MODULO Y FASE
\ No newline at end of file