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@sal92 wrote:
i have used analogue pins PG13, PH3 ,PH2,PG14, PE2,PE3, PE6, PE4,PE5,PF1,PF0,PF2
None of those pins has any analogue function:
PG13 TRACED0, LPTIM1_OUT,USART6_CTS, FMC_A24,EVENTOUT
PH3 QUADSPI_BK2_IO1,SAI2_MCK_B, FMC_SDNE0,EVENTOUT
PH2 LPTIM1_IN2, QUADSPI_BK2_IO0, SAI2_SCK_B, FMC_SDCKE0, EVENTOUT
PG14 TRACED1, LPTIM1_ETR,USART6_TX,QUADSPI_BK2_IO3, FMC_A25,EVENTOUT
PE2 TRACECLK, SPI4_SCK, SAI1_MCLK_A, QUADSPI_BK1_IO2, FMC_A23, EVENTOUT
PE3 TRACED0, SAI1_SD_B, FMC_A19, EVENTOUT
PE6 TRACED3, TIM1_BKIN2,TIM9_CH2, SPI4_MOSI,SAI1_SD_A, SAI2_MCK_B,FMC_A22, EVENTOUT
PE4 TRACED1, SPI4_NSS,SAI1_FS_A, FMC_A20,EVENTOUT
PE5 TRACED2, TIM9_CH1,SPI4_MISO, SAI1_SCK_A,FMC_A21, EVENTOUT
PF1 I2C2_SCL, FMC_A1, EVENTOUT
PF0 I2C2_SDA, FMC_A0, EVENTOUT
PF2 I2C2_SMBA, FMC_A2, EVENTOUT
Please show your schematic - that would be easier to follow.
An ADC is the only way you're going to directly read an analogue voltage as a digital value.
Otherwise, you're going to have to "synthesise" an ADC; eg, use a DAC to generate a "reference", and a comparator to compare.
Whatever you do, it's going to need hardware changes...
A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
