Electronic – Multiple(five) alarm time setting in stm32f0 mcu

developmentfirmwarehal-librarystm32cubemxstm32f0

I am working on my hobbyist project and need to develop the alarm timings.
And RTC and Timer are new for me and I am confused in RTC Alarm time setting.
I need to make alarm with RTC for five different times(as we are doing in the mobile).
So, I am looking for the same thing with my mcu.
Looking forward for the kind support …
(I am using STM32 Nucleo Board, KEIL-IDE, CubeMX)

Thanks

Best Answer

Check AN3371 at the official website of ST.

However, according to paragraph 2 there are only 2 alarms (A and B).

Alternatives:

Keep 5 alarms in your own code, set the first alarm (A) as alarm 1. When this fires, program A as for the next alarm (2) etc. Alarm B is not needed.
Do not use the alarm of the RTC, but a timer (not sure if the timer can be set for a long period).

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STM32F0 Help setting SPI

This is an example of how to not write code:

RCC_APB2ENR |= _BV(12); //SPI1EN

You have to remember what bit 12 means, an ususally end up looking in the manual to check. Repeating this for all the other bits takes too much time and errors are very difficult to spot.

Thats why there is a STM32F0xx standard peripherals library. Using this you can write much more readable code:

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

I would also expect to find some example code for SPI on the vendors website.

Electronic – How to read from multiple channels of the ADC on an STM32F407

hadc1.Init.ScanConvMode = DISABLE;

the sequencer is disabled so you cant read or even convert data coming from the other channel.
Also you have to define the rank of every channel.
for exemple :

sConfig.Rank      = 1;
     sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5 ;
     sConfig.Channel = REF_1_5_Volt_Pin;
     HAL_ADC_ConfigChannel(&hadc, &sConfig);
 sConfig.Rank = 2;
 sConfig.Channel = L1_voltage_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig);

 sConfig.Rank = 3;
 sConfig.Channel = L2_voltage_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig);

 sConfig.Rank = 4;
 sConfig.Channel = L3_voltage_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig);

 sConfig.Rank = 5;
 sConfig.Channel = L1_curent_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig);

 sConfig.Rank = 6;
 sConfig.Channel = L2_curent_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig);

 sConfig.Rank = 7
 sConfig.Channel = L3_curent_Pin;
 HAL_ADC_ConfigChannel(&hadc, &sConfig)

Best Answer

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STM32F0 Help setting SPI

Electronic – How to read from multiple channels of the ADC on an STM32F407

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