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Add support for differential ADC #246

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Merged
oclyke merged 11 commits into from
Aug 27, 2020
Merged

Add support for differential ADC #246

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bbd3cf7
Add configuration of differential 0 pins. Work in progress...
nseidle Jul 11, 2020
93dd11d
Move pin config
nseidle Jul 13, 2020
906ceac
The differential channels need to start as false and go true once con…
nseidle Jul 17, 2020
d2d95f9
VSC white space
nseidle Jul 17, 2020
14d8cdf
Add pad2pin
nseidle Jul 17, 2020
4c51148
Add diff pads 14/15
nseidle Jul 17, 2020
3629bde
Add pad2pin lookup
nseidle Jul 17, 2020
fbfdb25
Setup the differential pads once if user selects a diff 0/1 channel
nseidle Jul 17, 2020
063c5a4
Add example
nseidle Jul 18, 2020
33476cc
Add variant for RedBoard
nseidle Jul 18, 2020
23c8391
Adding variants for other boards.
Aug 13, 2020
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Add configuration of differential 0 pins. Work in progress...
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@nseidle
nseidle committed Jul 11, 2020
commit bbd3cf73a6ff0daa161630fd4b11759cedbebf50
32 changes: 25 additions & 7 deletions cores/arduino/ard_sup/analog/ap3_analog.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -335,21 +335,39 @@ ap3_err_t ap3_adc_setup()
}

//Set function of pin to analog input
//TODO Support differential pairs 0/1
ap3_err_t ap3_set_pin_to_analog(uint8_t pinNumber)
{
ap3_err_t retval = AP3_ERR;

uint8_t funcsel = 0;
am_hal_gpio_pincfg_t pincfg = AP3_PINCFG_INPUT;
retval = ap3_analog_pad_funcsel(ap3_gpio_pin2pad(pinNumber), &funcsel);

if (retval != AP3_OK)
//Handle special pads: differential pairs
if (pinNumber == AP3_ADC_DIFF0_PAD)
{
pincfg.uFuncSel = AM_HAL_PIN_12_ADCD0NSE9;
pinMode(12, pincfg, &retval);

pincfg.uFuncSel = AM_HAL_PIN_13_ADCD0PSE8;
pinMode(13, pincfg, &retval);

retval = AP3_OK;
}
else if (pinNumber == AP3_ADC_DIFF1_PAD)
{
}
else
{
return retval;
//Normal analog channels
retval = ap3_analog_pad_funcsel(ap3_gpio_pin2pad(pinNumber), &funcsel);

if (retval != AP3_OK)
{
return retval;
}
pincfg.uFuncSel = funcsel; // set the proper function select option for this instance/pin/type combination
pinMode(pinNumber, pincfg, &retval);
}
pincfg.uFuncSel = funcsel; // set the proper function select option for this instance/pin/type combination
pinMode(pinNumber, pincfg, &retval);

return retval;
}

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