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

    ```c
    // 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

    ```c
    // 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)

    ...
    ```