adc

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
feme_285141
Level 4
Level 4

 problems sending data of adc  and uart :

   
    
     #include <device.h>    
    
          
    
     /* Macro definitions */    
    
          
    
     #define DELAY               (5000u)    
    
          
    
     /* Resistor Values */    
    
          
    
          
    
     volatile uint32 windowFlag = 0u;    
    
     volatile uint8  dataReady  = 0u;    
    
          
    
          
    
     /* Send the channel number and voltage to UART */    
    
     static void SendChannelVoltage( int16 mVolts);    
    
          
    
     /* Interrupt prototypes */    
    
     CY_ISR_PROTO(ADC_ISR_Handler);    
    
          
    
     void main()    
    
     {    
    
           
    
         int16 mVolts  = 0;     
    
      /* Start the Components */    
    
            
    
         ADC_Start();    
    
         IDAC_Start();    
    
         UART_Start();    
    
             
    
         /* Start ISRs */    
    
         ADC_IRQ_StartEx(ADC_ISR_Handler);    
    
           
    
             
    
         /* Enable global interrupts */    
    
         CyGlobalIntEnable;    
    
             
    
          
    
             
    
         /* Start ADC conversion */    
    
         ADC_StartConvert();    
    
          
    
         for(;;)    
    
         {    
    
                 
    
             CyDelay(DELAY);    
    
             /* Wait for ADC conversion */    
    
             while(dataReady == 0u)    
    
             {    
    
             }    
    
                 
    
             /* Convert the ADC counts to mVolts. ADC is configured to be single channel */    
    
             mVolts = ADC_CountsTo_mVolts(0u, ADC_GetResult16(0u));    
    
             SendChannelVoltage( mVolts);    
    
             dataReady = 0u;    
    
                       
    
         }    
    
     }    
    
          
    
          
    
     static void SendChannelVoltage( int16 mVolts)    
    
     {    
    
         /* Clear Screen */     
    
            
    
         /* Print Channel */    
    
         UART_UartPutString(" Channel = ");    
    
         /* Display the channel number starting from 1 */    
    
           
    
         /* Convert Channel number to ASCII and send */    
    
           
    
             
    
             
    
             
    
         /* Send Volts to UART */    
    
         UART_UartPutChar(mVolts);    
    
           
    
         UART_UartPutString(" mV");    
    
         UART_UartPutCRLF(0u);    
    
     }    
    
          
    
          
    
     /******************************************************************************    
    
     * Function Name: ADC_ISR_Handler    
    
     *******************************************************************************    
    
     *    
    
     * Summary:    
    
     *  Interrupt Service Routine. Check the ADC status and sets window and data    
    
     *  ready flags.    
    
     *    
    
     ******************************************************************************/    
    
     CY_ISR(ADC_ISR_Handler)    
    
     {    
    
         uint32 intr_status;    
    
          
    
         /* Read interrupt status registers */    
    
         intr_status = ADC_SAR_INTR_MASKED_REG;    
    
         /* Check for End of Scan interrupt */    
    
         if((intr_status & ADC_EOS_MASK) != 0u)    
    
         {    
    
             /* Read range interrupt status and raise the flag */    
    
             windowFlag = ADC_SAR_RANGE_INTR_MASKED_REG;    
    
             /* Clear range detect status */    
    
             ADC_SAR_RANGE_INTR_REG = windowFlag;    
    
             dataReady = 1u;    
    
         }    
    
         /* Clear handled interrupt */    
    
         ADC_SAR_INTR_REG = intr_status;    
    
     }    
    
          
    
          
    
          
    
          
   
0 Likes
1 Reply
lock attach
Attachments are accessible only for community members.
ETRO_SSN583
Level 9
Level 9
250 likes received 100 sign-ins 5 likes given

You have to change this -

   

 

   

    UART_UartPutChar(mVolts);

   

 

   

to this -

   

 

   

     char strbuff[ 20 ];

   

     sprintf( strbuff, "%i4, 10", mVolts );       // Convert mVolts to a string

   

    UART_UartPutString( strbuff );

   

 

   

To enable the nano library (to handle sprintf and floats) -

   

 

   

    

   

         

   

http://airsupplylab.com/index.php/learn/14-psoc5/9-psoc-floating-point-problem-in-psoc-creator-3 nano library  enable

   

http://www.cypress.com/?id=4&rID=87354     nano library enable

   

 

   

Formatting strings for sprintf attached.

   

 

   

Set Heap and Stack to 0x0100 and 0x0400 respectively, to be able to handle the nano library.

   

 

   

Regards, Dana.

0 Likes