Hi, i am currently trying to make the ADC driver code for the stm32f3 version of the colorchord GitHub - cnlohr/colorchord: Chromatic Sound to Light Conversion System code work on an stm32f4, as my F4 does not have an on board microphone, also, i still want to use direct audio-line-in anyway since the microcontroller wont be especially close to the speakers anyway.
Here is the ADC.c code, i realize this isnt written on/for arduino but this code still works the same on the arduino platform for this sort of thing, it still uses the same libraries far as i can tell.
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//Mostly from: http://www.pezzino.ch/stm32-adc-voltage-monitor/
//Also: http://www.micromouseonline.com/2009/05/26/simple-adc-use-on-the-stm32/
#include "adc.h"
#include <stm32f30x_rcc.h>
#include <stm32f30x_gpio.h>
#include <stm32f30x_adc.h>
#include <stm32f30x_tim.h>
#include <stm32f30x_misc.h>
static int calibration_value;
extern RCC_ClocksTypeDef RCC_Clocks;
void InitADC()
{
/*
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// Configure the ADC clock
RCC_ADCCLKConfig( RCC_ADC34PLLCLK_Div2 );
//Enable ADC1 clock //
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_ADC34, ENABLE );
// ADC Channel configuration
// GPIOC Periph clock enable
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB, ENABLE );
/* Configure ADC Channel7 as analog input
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init( GPIOB, &GPIO_InitStructure );
ADC_StructInit( &ADC_InitStructure );
/* Calibration procedure
ADC_VoltageRegulatorCmd( ADC4, ENABLE );
/* Insert delay equal to 10 µs
_delay_us( 10 );
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_OneShot;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;
ADC_CommonInit( ADC4, &ADC_CommonInitStructure );
ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel = 1;
ADC_Init( ADC4, &ADC_InitStructure );
/* ADC4 regular channel3 configuration
ADC_RegularChannelConfig( ADC4, ADC_Channel_3, 1, ADC_SampleTime_181Cycles5 );
/* Enable ADC4
ADC_Cmd( ADC4, ENABLE );
/* wait for ADRDY
while( !ADC_GetFlagStatus( ADC4, ADC_FLAG_RDY ) );
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the TIM2 gloabal Interrupt
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init (&NVIC_InitStructure);
/* TIM2 clock enable
RCC_APB1PeriphClockCmd (RCC_APB1Periph_TIM2, ENABLE);
/* Time base configuration
RCC->CFGR |= 0X1400;
TIM_TimeBaseStructure.TIM_Period = (RCC_Clocks.HCLK_Frequency/(ADCFS*ADCOVERSAMP)) - 1;
TIM_TimeBaseStructure.TIM_Prescaler = 1 - 1; // Operate at clock frequency
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit (TIM2, &TIM_TimeBaseStructure);
/* TIM IT enable
TIM_ITConfig (TIM2, TIM_IT_Update, ENABLE);
/* TIM2 enable counter
TIM_Cmd (TIM2, ENABLE);
/* Start ADC4 Software Conversion
ADC_StartConversion( ADC4 );
*/
}
void TIM2_IRQHandler (void)
{
static uint8_t oversamp = 0;
static int32_t average = 0;
static int32_t oversampout = 0;
/*
if (TIM_GetITStatus (TIM2, TIM_IT_Update) != RESET) {
TIM_ClearITPendingBit (TIM2, TIM_IT_Update);
int16_t value = ADC_GetConversionValue(ADC4);
ADC_StartConversion( ADC4 );
oversampout += value;
oversamp++;
if( oversamp >= ADCOVERSAMP )
{
value = oversampout / ADCOVERSAMP;
average = ((average*1023) + (value*1024))/1024;
value = value-(average/1024);
oversamp = 0;
ADCCallback( value );
oversampout = 0;
}
}
*/
}
Problem is, the library for the stm32f3 and f4 are completely different so, its not just a matter of copypasting, and/or changing pin names and numbers, the actual function set required is completely different.
Could someone please help me figure out how to set up/configure the ADC on the F4 the same way the F3 code above would?
Im sort of on a time limit now, now and then ive been poking at the problem in my free time between study, but now its suddenly mid october and i wanted this done and working on the uC i have (stm32f407vet6) before my friends birthday since, an RBG visualizer using this was sort of my present to them, or, going to be.
Anyway, could someone please help me out with the ADC initialization code? i have no idea what half these configurations/functions do so, its proving extremely difficult to comb through the st libraries to find equivalent ones, so far i have a few down, but, many lines of code dont seem to have an equivalent.
at least for the config/setup, this code should be identical to how it would be initialized on the arduino IDE.
Or in short, i need the F4 equivalent for the contents of initadc()
thanks in advance.