static void adc_init(adc_t *adc)
{
uint32_t sadc_clk_div = adc->sadc_clk_div;
// set adc clk to 6MHz
RCC_APB2PeriphClockCmd(adc_apb2_periph(adc->base), ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_SDADCAnalogCmd(adc_pwr_periph(adc->base), ENABLE);
if (sadc_clk_div)
RCC_SDADCCLKConfig(sadc_clk_div);
else
// default to max speed if not specified
RCC_SDADCCLKConfig(RCC_SDADCCLK_SYSCLK_Div12);
// int the dma if given
if (adc->dma)
dma_init(adc->dma);
// setup the different adc configurations
SDADC_VREFSelect(adc->ref);
sys_spin(5);
SDADC_Cmd(adc->base, ENABLE);
SDADC_InitModeCmd(adc->base, ENABLE);
while (SDADC_GetFlagStatus(adc->base, SDADC_FLAG_INITRDY) == RESET)
{}
SDADC_AINInit(adc->base, SDADC_Conf_0, &adc->SDADC_AINStructure[0]);
SDADC_AINInit(adc->base, SDADC_Conf_1, &adc->SDADC_AINStructure[1]);
SDADC_AINInit(adc->base, SDADC_Conf_2, &adc->SDADC_AINStructure[2]);
// option to allow adc's to be sync'ed
SDADC_InjectedSynchroSDADC1(adc->base, adc->trigger.sync_adc1);
SDADC_InitModeCmd(adc->base, DISABLE);
// calibrate
SDADC_CalibrationSequenceConfig(adc->base, SDADC_CalibrationSequence_3);
SDADC_StartCalibration(adc->base);
while (SDADC_GetFlagStatus(adc->base, SDADC_FLAG_EOCAL) == RESET)
{}
SDADC_ClearFlag(adc->base, SDADC_FLAG_EOCAL);
adc->initalised = true;
}
/**
* @brief This function handles SDADC1 interrupt request.
* @param None
* @retval : None
*/
void SDADC1_IRQHandler(void)
{
uint32_t ChannelIndex;
if(SDADC_GetFlagStatus(SDADC1, SDADC_FLAG_JEOC) != RESET)
{
/* Get the converted value */
SDADC1testread = SDADC_GetInjectedConversionValue(SDADC1, &ChannelIndex);
}
}
static void adc_dma_complete(dma_request_t *req, void *param)
{
adc_channel_t *ch = (adc_channel_t *)param;
adc_t * adc = ch->adc;
adc_trace_complete_t cb;
int count;
sys_enter_critical_section();
// if we are in circular mode just keep going
if (!adc->dma->circ)
{
// stop the DMA, and turn off continuous mode, we are done
SDADC_DMAConfig(ch->adc->base, SDADC_DMATransfer_Injected, DISABLE);
// stop continous mode
SDADC_InjectedContinuousModeCmd(ch->adc->base, DISABLE);
// reset the trigger source
SDADC_InitModeCmd(adc->base, ENABLE);
while (SDADC_GetFlagStatus(adc->base, SDADC_FLAG_INITRDY) == RESET)
{}
SDADC_ExternalTrigInjectedConvEdgeConfig(adc->base, SDADC_ExternalTrigInjecConvEdge_None);
SDADC_InitModeCmd(adc->base, DISABLE);
}
///@todo handle any overruns (we should really handle this in a isr
/// but for now we can just clear the flag and hope the dma still completes)
SDADC_ClearITPendingBit(adc->base, SDADC_IT_JOVR);
sys_leave_critical_section();
if (req->dma->isr_status & 2)
count = ch->count;
else if (ch->count & 0x01)
// if count is odd isr rounds up
count = (ch->count >> 1) + 1;
else
