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10 Commits

Author SHA1 Message Date
Damien George 80883a82c0 stm32/adc: Deselect VBAT after reading to prevent battery drain. 
Signed-off-by: Damien George <damien@micropython.org>
 2020-12-18 13:32:02 +11:00
Damien George 0118c07916 stm32/machine_adc: Fix ADC auto-calibration to run when ADC not enabled. 
Prior to this commit, the ADC calibration code was never executing because
ADVREGEN bit was set making the CR register always non-zero.

This commit changes the logic so that ADC calibration is always run when
the ADC is disabled and an ADC channel is initialised.  It also uses the LL
API functions to do the calibration, to make sure it is done correctly on
each MCU variant.

Signed-off-by: Damien George <damien@micropython.org>
 2020-10-29 11:09:43 +11:00
Damien George 0f7b5cceea stm32/machine_adc: Make setting of ADC1_COMMON->CCR clearer on STM32WB. 2020-06-02 10:48:49 +10:00
Jim Mussared def76fe4d9 all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
Damien George 69661f3343 all: Reformat C and Python source code with tools/codeformat.py. 
This is run with uncrustify 0.70.1, and black 19.10b0.
 2020-02-28 10:33:03 +11:00
Damien George ad7213d3c3 py: Add mp_raise_msg_varg helper and use it where appropriate. 
This commit adds mp_raise_msg_varg(type, fmt, ...) as a helper for
nlr_raise(mp_obj_new_exception_msg_varg(type, fmt, ...)).  It makes the
C-level API for raising exceptions more consistent, and reduces code size
on most ports:

   bare-arm:   +28 +0.042%
minimal x86:  +100 +0.067%
   unix x64:   -56 -0.011%
unix nanbox:  -300 -0.068%
      stm32:  -204 -0.054% PYBV10
     cc3200:    +0 +0.000%
    esp8266:   -64 -0.010% GENERIC
      esp32:  -104 -0.007% GENERIC
        nrf:  -136 -0.094% pca10040
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
 2020-02-13 11:52:40 +11:00
Chris Mason 0096041c99 stm32/{adc,machine_adc}: Change ADC clock and sampling time for F0 MCUs. 
STM32F0 has PCLK=48MHz and maximum ADC clock is 14MHz so use PCLK/4=12MHz
to stay within spec of the ADC peripheral.  In pyb.ADC set common sampling
time to approx 4uS for internal and external sources.  In machine.ADC
reduce sample time to approx 1uS for external source, leave internal at
maximum sampling time.
 2019-10-04 21:39:17 +10:00
Damien George 22099ab88f stm32/machine_adc: Fix build for F4 and L4 MCUs that only have ADC1. 2019-09-12 19:10:12 +10:00
Damien George 62fe013a5f stm32/machine_adc: Improve operation of ADC for H7, L4 and WB MCUs. 2019-09-06 17:55:12 +10:00
Damien George ebacdfabb6 stm32/machine_adc: Add machine.ADC class. 2019-09-04 15:40:24 +10:00