Hi,
I've been having some troubles configuring DAC channels and can't seem to find what the problem is.I have a C++ class that is intended to setup and control a DAC and I can't write on the registers to do it. My class is the following (dac_test_class.h):
#include "stm32l0xx_hal.h"
#ifndef INC_DAC_TEST_CLASS_H_
#define INC_DAC_TEST_CLASS_H_
#ifdef __cplusplus
extern "C" {
#endif
class Dac_test_class{
private:
DAC_HandleTypeDef hdac; //DAC handler
public:
Dac_test_class(void);
void init_dac(void);
void set_dac(uint32_t dac_channel, uint32_t val); //Set DAC val to output
};
#ifdef __cplusplus
}
#endif
#endif /* INC_DAC_TEST_CLASS_H_ */
So far, this is my dac_test_class.cpp:
#include "dac_test_class.h"
Dac_test_class::Dac_test_class(){
}
void Dac_test_class::init_dac(){
hdac.Instance = DAC;
HAL_DAC_Init(&hdac);
DAC_ChannelConfTypeDef sConfig = {0};
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1);
}
void Dac_test_class::set_dac(uint32_t dac_channel, uint32_t val){
}
In my main.cpp, I start a new object and try to init the DAC:
Dac_test_class dac;
dac.init_dac();
During debug, what most startles me is that, inside HAL_DAC_ConfigChannel function, it all seems to run well until the line:
hdac->Instance->CR = tmpreg1;
Where tmpreg1 is 2. Running this line does not result in writing 2 to hdac->Instance->CR.
In fact, I've tried to iniciate the DAC channels with the following command:
hdac->Instance->CR |= (EN_CH1 | EN_CH2);
But to no avail. I've also tried to use SET_BIT, but with the same result. If I do this process in the main.cpp file it works. However, I need to do this inside a class for code portability.
What might I be missing here?
Thanks in advance
