Arduino for STM32

I continued working on it, most examples on internet were for F103 so I switched to F103 and eventually made it work, here is code that reads 2000 samples at 400kHz on F103 using DMA. The HAL_ADC_ConvCpltCallback is not triggered so I just put delay(100) there. After pressing "enter" in serial ...

- I added pinMode(*, INPUT_ANALOG) to all 16 adc pins just to be sure and set voltage there to approx 2V
- I added extern C
- still nothing, all zeroes
- if I comment out init_adc_to_use_dma(); and use analogRead(PA0) or any other pin it shows some value, but if I call init_adc_to_use_dma() even ...

Here is updated code but still all zeros:

#include "stm32g0xx_hal.h"

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;

uint32_t buffer[50];

void init_adc_to_use_dma() {
// Initialize the ADC
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
hadc1.Init ...

I need to read ADC faster than analogRead can, so I need to use DMA. Here is my code. It doesn't work it prints all zeros:

#include "stm32g0xx_hal.h"

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;

uint32_t buffer[50];

void init_adc_to_use_dma() {
// Configure the global features of the ...

Thanks it doubled the reading speed.

I need to change pin mode on PB6 and PB7 fast on STM32F103. Originally I was using:

pinMode(PB6, INPUT_PULLUP);
...
pinMode(PB6, OUTPUT);

Then I extracted minimal code from pinMode function:

void pin_function_fast(PinName pin, int function) {
uint32_t mode = function == INPUT ? 0 : 1; // STM ...