Usercode Utilities

Functions

• uint16_t os_incremental_encoder (uint8_t mode_type, uint8_t channel_def1, uint8_t channel_def2, uint16_t min, uint16_t max)
  • Read and calculate two encoder signals with a 90 degree phase shift.
  • Parameters
    • mode_type, set to ```PORT_INT_INCR_ENCODER``
    • channel_def1, set to the analog I/O pin connected to encoder channel A
    • channel_def2, set to the analog I/O pin connected to encoder channel B
    • min, set to the minimum value of the counter
    • max, set to the maximum value of the counter
  • returns the current value of the counter
• int16_t os_util_lookup1D (int16_t ∗table_x, int16_t ∗table_y uint8_t count, int16_t val, uint8_t mode)
  • get a interpolated value based on a one dimensional lookup table
  • Parameters
    • *table_x, pointer to 1D X array
    • *table_y, pointer to 1D Y array
    • count, number of elements in X array
    • val, value of the requested location in x array
    • mode, LUT_MODE_EXTRAPOLATION, extrapolate based on the array. LUT_MODE_LIMIT, don't extrapolate based on the array. LUT_MODE_KALIBRATION, y value always >=, extrapolating upwar with different (y_max - x_max)
  • returns the value of the y array

Example Code

• Read encoder signals

uint16_t counter;
// Set channel A of the encoder to analog input D_ANA3, channel B to D_ANA5, with min value of "0" and max
value "100"
counter = os_incremental_encoder(PORT_INT_INCR_ENCODER, D_ANA3, D_ANA5, 0, 100);

• Read from a 1D lookup table

// Create lookup tables.
int16_t table_x_lookup_prozent[] = {0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100};
int16_t table_y_lookup_power[] = {1000, 900, 800, 700, 600, 500, 400, 300, 200, 100, 0};
ret1 = os_util_lookup1D(table_x_lookup_prozent, table_y_lookup_power, 11, 500, LUT_MODE_EXTRAPOLATION); // ret1 == 50
ret2 = os_util_lookup1D(table_x_lookup_prozent, table_y_lookup_power, 11, 800, LUT_MODE_EXTRAPOLATION); // ret2 == 20
ret2 = os_util_lookup1D(table_x_lookup_prozent, table_y_lookup_power, 11, 250, LUT_MODE_EXTRAPOLATION); // ret3 == 75