Discussion in "PIC Microcontroller Discussion" started by    Max    Oct 27, 2014.
Mon Oct 27 2014, 01:30 PM
#1
Hi all , i am working with PSoC 5LP. I have continious changable Analog Signals. I convert it to Digital with help of ADC. From this Result i want to generate PWM (Output1 Forwards, Output2 Ruckwards). All in 16-Bits. So i have range upto 65536.

I have Analog Input 0,1 to 3,3v. So if i gave Input 1,6v than i have 50% Duty Cycle of generated PWM.

PWM Basic Configuration:
16-Bit UDB
PWM Mode: Two Outputs
Period: 65535
CMP Value1: 32767 CMP Value2: 32676
CMP Type 1: Less CMP Type 2: Greater
Dead Band: Disable
Interrupt: None

Clock with 12MHz freq.

Here is the code. In i have 12-bit ADC result. From this result i want to generate 2 PWM Outputs. I know that i have to use WritePeriod(), WriteCompare(), WriteDeadtime() APIs.
int32 ADC_Result;

uint16 i=0;
int pwmValue, pulseWidth;

int main()
{       
    // Start the components 
	Sys_Init(); 
		 
//	CyGlobalIntEnable;  // Uncomment this line to enable global interrupts.

   	// Start Clock & PWM
	Clock_Start();
	PWM_Start();						

    while(1)
    {						  			
	pwmValue = ADC_Result  // Which equation i have to use.
	PWM_WritePeriod(pwmValue);
	PWM_WriteCompare1(); 						
     }    
}

I read the PWM datasheet & also check the Example PWM Programms but still i am much confsed for this following questions.

1. Need i Dead Band?
2. Which equation for converting ADC result into PWM?
3. Need i Interrupt/Global Interrupt ?

Regards
Max

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Sun Oct 13 2019, 02:02 AM
Aline Hutchinson
Hey there,
ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 07:37 AM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Wed Sep 18 2019, 08:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 07:09 PM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 04:33 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 12:47 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 06:13 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Thu Jul 11 2019, 07:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

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