S14: Spectrum Analyzer for Audio Frequency Signals - Revision history

Preet: /* Project Source Code */

2014-08-06T23:40:57Z

‎Project Source Code

Preet: /* Grading Criteria */

2014-05-25T21:31:23Z

‎Grading Criteria

Proj user13: /* Software Design */

2014-05-24T23:38:13Z

‎Software Design

Proj user13: /* Software Design */

2014-05-24T23:37:28Z

‎Software Design

Proj user13: /* Software Design */

2014-05-24T23:36:16Z

‎Software Design

Proj user13: /* Software Design */

2014-05-24T23:35:30Z

‎Software Design

Proj user13: /* Software Design */

2014-05-24T23:34:25Z

‎Software Design

Proj user13: /* Team Members & Responsibilities */

2014-05-23T22:14:56Z

‎Team Members & Responsibilities

Proj user13: /* Software Design */

2014-05-23T02:20:50Z

‎Software Design

Proj user13: /* Acknowledgement */

2014-05-23T00:33:26Z

‎Acknowledgement

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 === Project Source Code ===
-Send me your zipped source code and I will upload this to SourceForge and link it for you.
+*  [https://sourceforge.net/projects/sjsu/files/CmpE244_SJSU_S2014/ Sourceforge source code link]
 == References ==

← Older revision		Revision as of 21:31, 25 May 2014
Line 1:		Line 1:
−	~~=== Grading Criteria ===~~
−	~~<font color="green">~~
−	* How well is Software & Hardware Design described?
−	* How well can this report be used to reproduce this project?
−	* Code Quality
−	* Overall Report Quality:
−	** Software Block Diagrams
−	** Hardware Block Diagrams
−	**: Schematic Quality
−	** Quality of technical challenges and solutions adopted.
−	~~</font>~~
−
	== Spectrum Analyzer for Audio Frequency Signals ==		== Spectrum Analyzer for Audio Frequency Signals ==

@@ Line 284: / Line 284: @@
 The various ports for A,B,C,OE,Clk,R1,R2,G1,G2,B1 and B2 were set depending upon the port on which they were connected to LPC board.
-  *We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
+**We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
-  *For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
+**For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
-  *Also, we need to  clear the interrupt flag after every operation of the display.
+**Also, we need to  clear the interrupt flag after every operation of the display.
-  *Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
+**Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
-  *The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
+**The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
 <syntaxhighlight lang="c">

@@ Line 284: / Line 284: @@
 The various ports for A,B,C,OE,Clk,R1,R2,G1,G2,B1 and B2 were set depending upon the port on which they were connected to LPC board.
-**We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
+  *We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
-**For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
+  *For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
-**Also, we need to  clear the interrupt flag after every operation of the display.
+  *Also, we need to  clear the interrupt flag after every operation of the display.
-**Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
+  *Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
-**The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
+  *The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
 <syntaxhighlight lang="c">

@@ Line 284: / Line 284: @@
 The various ports for A,B,C,OE,Clk,R1,R2,G1,G2,B1 and B2 were set depending upon the port on which they were connected to LPC board.
->>We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
+**We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C    depending upon the row or column we need to select.
->>For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
+**For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
->>Also, we need to  clear the interrupt flag after every operation of the display.
+**Also, we need to  clear the interrupt flag after every operation of the display.
->>Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
+**Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
->>The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
+**The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
 <syntaxhighlight lang="c">

@@ Line 283: / Line 283: @@
 The main problem in configuration of the LED Matrix was that its library was in Arduino. Also, the data sheet for the matrix was not available. Hence, we had to port it to the LPC1758. The pseudo code which we implemented in C is given as follows
 The various ports for A,B,C,OE,Clk,R1,R2,G1,G2,B1 and B2 were set depending upon the port on which they were connected to LPC board.
-** We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C depending upon the row or column we need to select.
-** For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
+. We used #define to make each pin correspond to the required port.Initially we have to clear the display, then set the pins for A,B and C depending upon the row or column we need to select.
-** Also, we need to  clear the interrupt flag after every operation of the display.
+. For that, the bit masking for Apin, Bpin and Cpin was used. We used a 'for' loop to access all 32 columns of the LED matrix.
-** Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
+. Also, we need to  clear the interrupt flag after every operation of the display.
-** The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
+. Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
 <syntaxhighlight lang="c">

@@ Line 52: / Line 52: @@
 === Team Members & Responsibilities ===
 *  Anand Dumbre
-** ADC interfacing + LED Interfacing + UART communication
+** ADC interfacing + LED Interfacing + UART communication + Fast Fourier Transforms analysis
 *  Chinmay Vaidya
 ** Fast Fourier Transforms analysis + Hardware + LED Interfacing

@@ Line 287: / Line 287: @@
 ** Also, we need to  clear the interrupt flag after every operation of the display.
 ** Then we set the required pins to output. After that, the timer frequency was allocated, the reset mode was configured.
-** Along with that, the enabling of timer interrupt to occur according to our requirements.The snippet of the code(especially the initial configurations) is given below.
+** The following code is an example of how to set rows in top half of the screen. For accessing the bottom half of the screen use the R2, B2, G2 pins to display colors.
 <syntaxhighlight lang="c">
@@ Line 301: / Line 301: @@
 <syntaxhighlight lang="c">
-if (LPC_TIM2->IR & MR0MASK)  // Check if the interrupt occured
+{
      LPC_GPIO0->FIOPIN |= (1 << OEPIN); // Disable LED output
@@ Line 311: / Line 311: @@
      /* Output color */
-     LPC_GPIO2->FIOPIN |= (1 << R1PIN) | (1<<B2PIN) | (1<<G1PIN);
+     LPC_GPIO2->FIOPIN |= (1 << R1PIN)| (1<<G1PIN);
      LPC_GPIO0->FIOPIN |= ( 1 << CLOCKPIN);
      LPC_GPIO0->FIOPIN &= ~(1 << CLOCKPIN);
@@ Line 325: / Line 325: @@
          row=0;
+}
 </syntaxhighlight>

@@ Line 380: / Line 380: @@
 == References ==
 === Acknowledgement ===
-We obtained the components from ADAFruit and Sparkfun. We would like to thank Preet for teaching us this course and his guidance in the project as well as the coursework.
+We obtained the components from ADAFruit and Sparkfun. We would like to thank Preet for teaching us this course and his guidance in the project as well as the coursework. We would also like to thank Preet for providing us with couple of extra LED boards so that we were able to work on it more efficiently.
 === References Used ===