Posted on July 28, 2014 at 11:40 Hi All,
I'm trying to use the ADC1 GPIO G8 from the STM32F207IG.
Unfortunately I don't get it working and maybe someone could help me.
The basic problem is that all ADC_*** registers getting updated except the ADC_DR register.
In a first try I would like to configure the ADC for a single conversion without DMA.
A few code lines:
//config Charge Indicator Port as analog input
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
GPIO_PortClock (CHARGE_GPIO,
true
);
GPIO_PinConfigure (CHARGE_GPIO, CHARGE_PINNR, GPIO_MODE_ANALOG, GPIO_OUTPUT_PUSH_PULL, GPIO_OUTPUT_SPEED_2MHz, GPIO_NO_PULL_UP_DOWN);
ADC_DeInit();
ADC_Common.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_Common.ADC_Mode = ADC_Mode_Independent;
ADC_Common.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_Common.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_10Cycles;
ADC_CommonInit(&ADC_Common);
ADC_InitStruct.ADC_ContinuousConvMode = DISABLE;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_NbrOfConversion = 1;
ADC_InitStruct.ADC_Resolution = ADC_Resolution_10b;
ADC_InitStruct.ADC_ScanConvMode = DISABLE;
ADC_Init(ADC_Device, &ADC_InitStruct);
ADC_Cmd(ADC_Device, ENABLE);
ADC_RegularChannelConfig(ADC_Device, ADC_Channel_1, 1, ADC_SampleTime_3Cycles);
ADC_DiscModeChannelCountConfig(ADC_Device, 1);
ADC_DiscModeCmd(ADC_Device, ENABLE);
ADC_ITConfig(ADC_Device, ADC_IT_EOC, ENABLE);
ADC_ExternalTrigInjectedConvEdgeConfig(ADC_Device, ADC_ExternalTrigInjecConvEdge_None);
ADC_ExternalTrigInjectedConvConfig(ADC_Device, ADC_ExternalTrigConvEdge_None);
osDelay(1);
RCC_GetClocksFreq(&xy);
//PHB2 = 7.5MHz
for
(;;){
ADC_ClearFlag(ADC_Device, ADC_FLAG_EOC);
ADC_ClearFlag(ADC_Device, ADC_FLAG_STRT);
ADC_SoftwareStartConv(ADC_Device);
k = 0;
while
(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET){
k++;
}
value = ADC_GetConversionValue(ADC_Device);
}
It would be very kind if someone could help me out.
Thanks
Benjamin
Addendum:
If I do the exact same with ADC_3_IN_6 GPIOF8 the code works fine.
Do I have to enable something special for ADC1?
#stm32 #adc_dr #adc
