microchip-application-pec930-pec930_peripheral/Examples/pga/pga_src_internal

pga_src_internal

This example is used to demo the PGA module which uses internal signals as input/output

Only PGA0 supports internal source

• Configure the amplifier gain

  // at main.c
  /**
   *  The amplify gain, @ref OPAMP_PGAGainTypeDef
   *  ps. OPAMP_PGAGain_1 ~ OPAMP_PGAGain_16
   */
  #define CONFIG_AMP_GAIN             OPAMP_PGAGain_1
  

• Configure the reference mVoltage of ADC to convert the sampled value to mVoltage

  // at main.c
  /**
   *  The reference mVoltage of ADC on board
   */
  #define CONFIG_ADC_REF_mVOLTAGE         3300
  

Log

Use serial port with baudrate 115200, 8bit, no parity check.

• Internal signal

  • Temperature: Analog signal output to PA8 (0.686 V)
  • DAC0 : Analog signal output to PA8 (1.627 V)
  • DAC1 : Analog signal output to PA8 (1.659 V)
  • VBuf 1.5v : Analog signal output to PA8 (1.511 V)
  • VDDL : Analog signal output to PA8 (1.521 V)
  • VSS : Analog signal output to PA8 (0.002 V)
  • VDD : Analog signal output to PA8 (3.288 V)

  Oct  1 2025 15:48:50
  Run PGA-0 (Programmable Gain Amplifier) internal source
    The gain 1
    VinP= Internal signal
    VinM= GND
    Vout= ADC AIN0
  
  Set internal signal: Temperature
    ADC samples the PGA Vout= 0x00000353 (685 mV)
  
  Set internal signal: DAC 0
    ADC samples the PGA Vout= 0x000007D7 (1616 mV)
  
  Set internal signal: DAC 1
    ADC samples the PGA Vout= 0x000007F0 (1637 mV)
  
  Set internal signal: VBuf 1.5
    ADC samples the PGA Vout= 0x0000074C (1504 mV)
  
  Set internal signal: VDDL
    ADC samples the PGA Vout= 0x00000757 (1513 mV)
  
  Set internal signal: VSS
    ADC samples the PGA Vout= 0x00000006 (4 mV)
  
  Set internal signal: VDD
    ADC samples the PGA Vout= 0x00000FEF (3286 mV)
  
  Set internal signal: Temperature
    ADC samples the PGA Vout= 0x0000034F (682 mV)
  
  Set internal signal: DAC 0
    ADC samples the PGA Vout= 0x000007CE (1609 mV)
  
  Set internal signal: DAC 1
    ADC samples the PGA Vout= 0x00000822 (1677 mV)
  
  Set internal signal: VBuf 1.5
    ADC samples the PGA Vout= 0x0000074F (1507 mV)
  
  Set internal signal: VDDL
    ADC samples the PGA Vout= 0x0000074C (1504 mV)
  
  Set internal signal: VSS
    ADC samples the PGA Vout= 0x00000004 (3 mV)
  
  Set internal signal: VDD
    ADC samples the PGA Vout= 0x00000FED (3284 mV)
  
  Set internal signal: Temperature
    ADC samples the PGA Vout= 0x0000034F (682 mV)
  
  Set internal signal: DAC 0
    ADC samples the PGA Vout= 0x000007E2 (1625 mV)
  
  Set internal signal: DAC 1
    ADC samples the PGA Vout= 0x000007F2 (1638 mV)
  
  Set internal signal: VBuf 1.5
    ADC samples the PGA Vout= 0x00000747 (1500 mV)
  
  Set internal signal: VDDL
    ADC samples the PGA Vout= 0x00000755 (1512 mV)
  
  Set internal signal: VSS
    ADC samples the PGA Vout= 0x00000008 (6 mV)
  
  Set internal signal: VDD
    ADC samples the PGA Vout= 0x00000FF6 (3291 mV)
  
  ...