1 ACCEPTED SOLUTION
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Hello @Sudhakar.R
Change to Timer 3 and follow this configuration instead
Trigger output event set to Update Event so that event every time the timer counter reaches ARR. Also, you should adjust counter period depending on sampling frequency and the application requirements.
You don't need Output Compare 1 mode in this application.
Hope this helps
Hello @Sudhakar.R
Maybe you should start by exploring the provided example of PWMOutput.
Then, get inspired by the example provided of ADC injected conversion. You may refer to RM0008 section 11.3.9 Injected channel management Subsection Triggered Injection for the configuration.
To do so, you may start the configuration on CubeMX, to enable the ADC injected channel using TIM2 PWM. Here is an example :
Hope this helps.
When your question is answered, please close this topic by choosing Select as Best.
Firas
Hello @F.Belaid
I am using one regular ADC channel and one Injected ADC channel with PWM using STM32F103C8T6. but I getting regular and injected ADC values only and PWM is not generate. below mention my code and output image.
This is my code,
#include<stm32f10x.h>
volatile uint32_t Data_1 = 0;
volatile uint32_t Data_2 = 0;
void Delay(unsigned int T)
{
while(T--);
}
void ADC_Config()
{
RCC->APB2ENR|=(1<<9)|(1<<3); //ADC 1 interface clock enable & IO port B clock enable
RCC->APB2ENR|=(1<<2); //IO port A clock enable
GPIOB->CRL|=0x00000000; //GPIOB 0_PIN SELECTED AS ANALOG INPUT
GPIOA->CRL|=0x0000000B; //GPIOA 0_PIN SELECTED AS ANALOG INPUT
ADC1->CR2|=0x00000001; // Enable ADC and to start conversion
RCC->CFGR|=0x00008000; //ADC prescaler /PCLK2 divided by 6(72MHZ/6=12MHZ)
ADC1->CR2|=(1<<15); //Conversion on external trigger conversion mode enable for injected channels
ADC1->CR1&= ~ADC_CR1_JAUTO; //Automatic injected group conversion disable
ADC1->CR1|=(1<<8); //Scan mode enable
/* Select Timer 2 TRGO event for injected group */
ADC1->CR2&= ~ADC_CR2_JEXTSEL;
ADC1->CR2|= (1<<13); //010: Timer 2 TRGO event
ADC1->CR2|=0x00000002; //Continuous conversion mode & Data Alignment RIGHT
Delay(1);
ADC1->CR2|=0x00000001; // Enable ADC and to start conversion
Delay(1);
ADC1->CR2|=0x00000004; // ENABLE CALIBRATION
while(ADC1->CR2 & 0x00000004);
/* Select Channel 7 regular */
ADC1->SMPR2|=((1<<21)|(1<<22)|(1<<23)); //SELECT SMP7 SAMPLE_TIME_5 AS 239.5 cycles
ADC1->SQR1|=0x00000000; // SELECT THE 1_CONVERSION
ADC1->SQR3|=0x00000008; // SELECT THE 8_CHANNEL
/* Select Channel injected */
ADC1->JSQR&= ~ADC_JSQR_JL;
ADC1->JSQR&= ~ADC_JSQR_JSQ4;
ADC1->JSQR|= ADC_JSQR_JSQ4_1;
/* Start Conversion of Regular Channels */
ADC1->CR2|= ADC_CR2_SWSTART;
/* Start Conversion of Injected Channels */
ADC1->CR2|= ADC_CR2_JSWSTART;
}
void Timer_Config()
{
RCC->APB1ENR=0X00000001; //TIMR2 CLOCK ENABLE
TIM2->CR1|=(1<<7); //1: TIMx_ARR register is buffered & Auto-reload preload enable
TIM2->CR1&= ~TIM_CR1_DIR; //Set Counter Direction as Up-Counter
TIM2->ARR=36-1; //ARR VALUE IS 0-65535
TIM2->PSC=1000-1; //PERSCALER VALUE IS 0-65535
TIM2->CCR1 =Data_2<<4; //18; //Duty Cycle
TIM2->CNT=0; //COUNT START IN 0
/* Select update event as trigger output (TRGO) */
TIM2->CR2&= ~TIM_CR2_MMS;
TIM2->CR2|= TIM_CR2_MMS_1;
/* Output Compare 1 mode */
//TIM2->CCMR1&= ~TIM_CCMR1_OC1M; //Clear Output compare 1 mode
TIM2->CCMR1|= TIM_CCMR1_OC1CE; //Output compare 1 clear enable
TIM2->CCMR1|=(1<<3); //Output compare 1 preload enable
TIM2->CCMR1|= TIM_CCMR1_OC1M_0|TIM_CCMR1_OC1M_1; //Configure the pins as PWM
TIM2->CCER = 0x00000001; //Capture/Compare 1 output enable
TIM2->CR1|=0x00000001; //COUNTER ENABLE
TIM2->EGR = 0x00000001;
}
int main()
{
ADC_Config();
Timer_Config();
while(1)
{
GPIOA->ODR |= (1<<0);
/*Check ADC1 EOC */
if((ADC1->SR & ADC_SR_EOC) == ADC_SR_EOC)
{
/* Read analog data and clear EOC flag */
Data_1 = ADC1->DR;
/* Start conversion of regular Channels */
ADC1->CR2|= ADC_CR2_SWSTART;
}
ADC1->SR|= ADC_SR_JSTRT;
/* Check ADC1 JEOC */
if((ADC1->SR & ADC_SR_JEOC) == ADC_SR_JEOC)
{
/* Read analog data and clear EOC flag */
Data_2 = ADC1->JDR1;
/* Clear JEOC flag */
ADC1->SR &= ~(ADC_SR_JEOC);
/* Start Conversion of Injected Channels */
ADC1->CR2|= ADC_CR2_JSWSTART;
}
}
}
i don't know where i mistake. if you know help me.
This is my output image,
Hello @Sudhakar.R
Change to Timer 3 and follow this configuration instead
Trigger output event set to Update Event so that event every time the timer counter reaches ARR. Also, you should adjust counter period depending on sampling frequency and the application requirements.
You don't need Output Compare 1 mode in this application.
Hope this helps
