Posted on October 30, 2013 at 11:57
Hello.
STM32F373C8, IAR
I have a problem with monitoring battary charge on Vbat pin by internal ADC1 channel. I configurated phy like in stm32f37x_dsp_stdperiph_lib but it dosn't works right. My code:
void
Vbat_Init(
void
)
{
ADC_InitTypeDef ADC_InitStructure;
RCC_ADCCLKConfig( RCC_PCLK2_Div4 );
RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC1, ENABLE );
ADC_DeInit( ADC1 );
ADC_StructInit( &ADC_InitStructure );
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init( ADC1, &ADC_InitStructure );
SYSCFG_VBATMonitoringCmd(ENABLE);
ADC_RegularChannelConfig( ADC1, ADC_Channel_Vbat, 1, ADC_SampleTime_239Cycles5 );
ADC_Cmd( ADC1, ENABLE );
ADC_ResetCalibration( ADC1 );
while
( ADC_GetResetCalibrationStatus(ADC1) );
ADC_StartCalibration( ADC1 );
while
( ADC_GetCalibrationStatus(ADC1) );
ADC_Cmd( ADC1, ENABLE );
}
int
main(
void
)
{
Vbat_Init();
__IO
static
uint16_t BatV;
while
( 1 )
{
__delay_ms( 100 );
BatV = ADC_GetConversionValue( ADC1 );
}
}
And I get values such: 2041, 2066, 2175, 2066, 2063, 2048, 2066, 2215, 2..
It's not right values and I try to change voltage on Vbat pin, try different battaries or disassembly it all, nothing changes.
And at the same time if I try measure temperature it's all ok.
I looked in other forums but didn't help.
