PWM input capture and repeat. STM32F4 - stm32

guys.
I generated PWM signal with timer TIM1.
I want get this PWM from TIM1 with timer TIM2 and repeat it on the some GPIO pin.
I used Standart Peripheral Library.
PWM has generated on pin PA8 with timer TIM1 successfully, but i can't receive this PWM signal from PA0 pin with TIM2.
(PA8 и PA0 i connected with cable.)
Help me, please.
type here
#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_tim.h"
#include "misc.h"
#include <stdio.h>
GPIO_InitTypeDef GPIO_InitStruct;
TIM_TimeBaseInitTypeDef TIM1_TimeBaseStruct;
TIM_OCInitTypeDef TIM1_OCInitStruct;
TIM_ICInitTypeDef TIM_ICInitStruct;
volatile uint16_t capture1 = 0, capture2 = 0;
volatile uint8_t capture_is_first = 1, capture_is_ready = 0;
const uint32_t myPeriod = 61538 - 1;
const uint32_t myPrescaler = 1 - 1;
const uint32_t myPulse = 5000;
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
// Generate PWM on PA8
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStruct);
// Input capture PWM on PA0
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_TIM1);
TIM1_TimeBaseStruct.TIM_Period = myPeriod;
TIM1_TimeBaseStruct.TIM_Prescaler = myPrescaler;
TIM1_TimeBaseStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM1_TimeBaseStruct);
TIM1_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
TIM1_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM1_OCInitStruct.TIM_Pulse = myPulse;
TIM1_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM1_OCInitStruct.TIM_OCNPolarity = TIM_OutputState_Disable;
TIM1_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1, &TIM1_OCInitStruct);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1, ENABLE);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
TIM_TimeBaseInitTypeDef timer_base;
TIM_TimeBaseStructInit(&timer_base);
timer_base.TIM_Prescaler = 24000 - 1;
TIM_ICInitTypeDef timer_ic;
timer_ic.TIM_Channel = TIM_Channel_1;
timer_ic.TIM_ICPolarity = TIM_ICPolarity_Rising;
timer_ic.TIM_ICSelection = TIM_ICSelection_DirectTI;
timer_ic.TIM_ICPrescaler = TIM_ICPSC_DIV1;
timer_ic.TIM_ICFilter = 0;
TIM_ICInit(TIM2, &timer_ic);
TIM_ITConfig(TIM2, TIM_IT_CC1, ENABLE);
NVIC_EnableIRQ(TIM2_IRQn);
/* Включаем таймер */
TIM_Cmd(TIM2, ENABLE);
while (1)
{
}
} // main
void TIM2_IRQHandler(void)
{
int i = 0;
i++;
printf("I'm TIM2 IRQ Handler.");
if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);
capture1 = capture2;
capture2 = TIM_GetCapture1(TIM2);
if (!capture_is_first)
capture_is_ready = 1;
capture_is_first = 0;
if (TIM_GetFlagStatus(TIM2, TIM_FLAG_CC1OF) != RESET)
{
TIM_ClearFlag(TIM2, TIM_FLAG_CC1OF);
// ...
}
}
}
I wrote the receive (input capture) PWM signal code using examples from the Internet, but i can't debug this. Help please. I'm new to embedded dev.

Related

Why can't I enter USART3_IRQHandler?

#if EN_USART2
u16 _distance1=0;
u16 distance1=0;
void USART2_Init(u32 bound) {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = bound;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_Cmd(USART2, ENABLE);
}
void USART2_IRQHandler(void){
u8 a;
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET){
a =USART_ReceiveData(USART2);
if(a!=0xa5) _distance1=(_distance1<<8)|a;
else
{
distance1=_distance1;
_distance1=0;
}
}
}
#endif
#if EN_USART3
u16 _distance2=0;
u16 distance2=0;
void USART3_Init(u32 bound) {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = bound;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART3, &USART_InitStructure);
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_Cmd(USART3, ENABLE);
}
void USART3_IRQHandler(void){
u8 a;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET){
a =USART_ReceiveData(USART3);
if(a!=0xa5) _distance2=(_distance2<<8)|a;
else
{
distance2=_distance2;
_distance2=0;
}
}
}
#endif
This is part of the code of usart.c. EN_USART2 and EN_USART3 are all 1. main.c is as follows:
#include "stm32f10x.h"
#include "delay.h"
#include "system.h"
#include "usart.h"
// Device header
int main(void)
{
SystemInit();
USART1_Init(115200);
USART2_Init(115200);
USART3_Init(115200);
while(1)
{
printf("difference: %dmm\r\n",distance1-distance2);
delay_ms(100);
}
}
It runs on STM32F103C8T6. PA2 and PA3 connects to an ultrasound module, and PB10 and PB11 connects to another ultrasound module. I found that the interruption service function of USART2 can be implemented, but that of USART3 cannot. Why is that? USART3 and USART2 are all written similarly. (As for how do I know that USART2 doesn't work: I added printf("p") behind a =USART_ReceiveData(USART3);, but I didn't see any "p" on the serial debug window(however, messages printed in main() all displayed well, which means that USART1 is normal).
I searched for the template code, but I can't find anything wrong in my own code.

DMA in EVE board 3

I am trying to do DMA in eve3-43inch LCD TFT ( matrix orbital), TFT screen working without DMA but as soon I add DMA settings DMA does not respond ing. What might be the reason? I using EVE81.h library. These codes I have added to make SPI initialization with DMA.
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hspi->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspInit 0 */
/* USER CODE END SPI1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PB5 ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* SPI1 DMA Init */
/* SPI1_RX Init */
hdma_spi1_rx.Instance = DMA2_Stream0;
hdma_spi1_rx.Init.Channel = DMA_CHANNEL_3;
hdma_spi1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_spi1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi1_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi1_rx.Init.Mode = DMA_NORMAL;
hdma_spi1_rx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_spi1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi1_rx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hspi,hdmarx,hdma_spi1_rx);
/* SPI1_TX Init */
hdma_spi1_tx.Instance = DMA2_Stream3;
hdma_spi1_tx.Init.Channel = DMA_CHANNEL_3;
hdma_spi1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi1_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi1_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi1_tx.Init.Mode = DMA_CIRCULAR; //DMA_NORMAL;
hdma_spi1_tx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_spi1_tx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;//DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi1_tx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hspi,hdmatx,hdma_spi1_tx);
/* SPI1 interrupt Init */
HAL_NVIC_SetPriority(SPI1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI1_IRQn);
/* USER CODE BEGIN SPI1_MspInit 1 */
/* USER CODE END SPI1_MspInit 1 */
}
}
Here I am transmitting as DMA or normal way. These codes working without DMA. After making it to transmit or receive through DMA LCD not responding.
void HAL_SPI_WriteBuffer(uint8_t *Buffer, uint32_t Length)
{
HAL_SPI_Enable();
volatile int result = HAL_SPI_Transmit(&hspi1, Buffer, Length, 1000);
//volatile int result = HAL_SPI_Transmit_DMA(&hspi1, Buffer, Length);
HAL_SPI_Disable();
}
void HAL_SPI_ReadBuffer(uint8_t *Buffer, uint32_t Length)
{
//EVE requires one dummy read/write before actual data can be read
Buffer[0] = 0;
volatile int result = HAL_SPI_Transmit(&hspi1, Buffer, 1, 1000);
HAL_SPI_Receive(&hspi1, Buffer, Length,1000);
//volatile int result = HAL_SPI_Transmit_DMA(&hspi1, Buffer, 1);
//HAL_SPI_Receive_DMA(&hspi1, Buffer, Length);
}
uint8_t HAL_SPI_Write(uint8_t data)
{
//volatile int result = HAL_SPI_Transmit(&hspi1, &data, 1, 1000);
volatile int result = HAL_SPI_Transmit_DMA(&hspi1, &data, 1);
return 0;
}

STM32F103 Timer alternate function remapping

I am experimenting with some VGA generating code by Artekit, at https://www.artekit.eu/vga-output-using-a-36-pin-stm32/. This code generates a PWM signal for HSYNC using TIM2 Channel 2, which is output on port PA1. This all works correctly. Now I would like to remap TIM2 so that the PWM signal is remapped to pin PB3. After calling GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE) the PWM signal no longer appears on PA1 but it does not appear on PB3 although all timer interrupts continue to work as normal. What am I missing?
RCC configuration is as follows:
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_SPI1 | RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
Relevant code is below.
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef nvic;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
u32 TimerPeriod = 0;
u16 Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0;
// Remap PA1 -> PB3
GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
TimerPeriod = 2048;
Channel1Pulse = 144; /* HSYNC */
Channel2Pulse = 352; /* HSYNC + BACK PORCH */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = Channel1Pulse;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;
TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
/* TIM1 counter enable and output enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
/* Select TIM1 as Master */
TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);
TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);
TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Gated);
TIM_SelectInputTrigger(TIM2, TIM_TS_ITR0);
TimerPeriod = 625; /* Vertical lines */
Channel2Pulse = 2; /* Sync pulse */
Channel3Pulse = 24; /* Sync pulse + Back porch */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = TimerPeriod;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Set;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;
TIM_OCInitStructure.TIM_Pulse = Channel3Pulse;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
/* TIM2 counter enable and output enable */
TIM_CtrlPWMOutputs(TIM2, ENABLE);
/* Interrupt TIM2 */
nvic.NVIC_IRQChannel = TIM2_IRQn;
nvic.NVIC_IRQChannelPreemptionPriority = 1;
nvic.NVIC_IRQChannelSubPriority = 0;
nvic.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&nvic);
TIM_ITConfig(TIM2, TIM_IT_CC3, ENABLE);
/* Interrupt TIM1 */
nvic.NVIC_IRQChannel = TIM1_CC_IRQn;
nvic.NVIC_IRQChannelPreemptionPriority = 1;
nvic.NVIC_IRQChannelSubPriority = 0;
nvic.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&nvic);
TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE);
TIM_Cmd(TIM2, ENABLE);
TIM_Cmd(TIM1, ENABLE);
Thanks #old_timer, that put me on the right track. SWO is enabled by default, which is on PB3 and needs to be disabled.
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);
GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE);
does the trick. The two remappings need to be done separately, combining them does not work.

STM32F1 ADC_DMA and USART_DMA_TX

I try to finish the code about: ADC using DMA and then the data transfer through PC by using USART. I want to use USART_DMA to avoid occupying CPU. I use sample frequency rate 1000Hz by using array ADC[] and delay 1ms (delay here mean I use systemtick, you haven't check this point I am sure it work well).
In this code below, have I missed something?
So here my code:
USART_DMA code:
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
#include "USART.h"
char TxBuffer[16];
USART_InitTypeDef USART_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
void USART_Configuration(unsigned int BaudRate)
{
/* Characteristic of USART*/
USART_InitStructure.USART_BaudRate = BaudRate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
/* Enable USART*/
USART_Cmd(USART1, ENABLE);
}
void DMA_Configuration(void)
{
DMA_DeInit(DMA1_Channel2);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)TxBuffer; // send buffer
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; // Transmit
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel2, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel2, ENABLE);
USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
while (DMA_GetFlagStatus(DMA1_FLAG_TC2) == RESET)
{}
}
ADC_DMA code:
#include "ADC_DMA.h"
uint32_t ADCValue[2] = {0};
void ADC_DMA(void){
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* DMA Configure */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCValue; // address of array data
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(ADC1->DR));
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 2; // kich thuoc mang du lieu tuong ung so phan tu cua ADCValue
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* DMA1_Stream0 enable */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC Common Init */
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 2; //so kenh ADC chuyen doi
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channels configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_7Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_7Cycles5);
/* Enable ADC DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
Main function:
#include "stm32f10x.h"
#include "stdio.h"
#include "ADC_DMA.h"
#include "USART.h"
/* Declare variable*/
__IO uint16_t x,y;
extern uint32_t time=0;
extern uint32_t ADCValue[];
extern char TxBuffer[16];
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
void GPIO_Configuration(void);
void Delay(__IO uint32_t nCount);
int main()
{
GPIO_Configuration();
ADC_DMA();
RCC_DeInit();
USART_Configuration(115200);
SysTick_Config(SystemCoreClock / 1000);
/****************************************
*SystemFrequency/1000 1ms *
*SystemFrequency/100000 10us *
*SystemFrequency/1000000 1us *
*****************************************/
while(1)
{
Delay(1000); // 100000 = 100ms
x = ADCValue[0];
y = ADCValue[1];
}
sprintf(TxBuffer,"%d#\n%d$\n", x,y);
}
}
void GPIO_Configuration(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOB, ENABLE);
/* Configure PB0 PB1 in output pushpull mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure PA0 in input mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable clock DMA1 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable clock ADC1 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
/* Configure ADC Pin PA0 & PA1 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable clock for USART1*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* Enable clock DMA1 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Configure USART Tx as alternate function */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART Rx as alternate function */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void Delay(__IO uint32_t nCount)
{
time = nCount;
while(nCount--);
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif

stm32 pulse count up mode with reset, why not reset? (two signal reset count and steps)

I make this easy example, with count pulse input TI1 and reset pulse input TI2
when enable reset trigger counter give random numbers!
stm32 driver https://github.com/mbedmicro/mbed/blob/9b7d23d47153c298a6d24de9a415202705889d11/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_tim.h
function is like this:
/* Select the TIM_SMCR_TS_1 signal as Input trigger for the TIM */
htim->Instance->SMCR &= ~TIM_SMCR_TS;
htim->Instance->SMCR |= TIM_SMCR_TS_1;
Use the TIM_SMCR_TS_1 to reset the TIM counter each edge detection */
htim->Instance->SMCR &= ~TIM_SMCR_SMS;
htim->Instance->SMCR |= TIM_SLAVEMODE_RESET;
code:
#include "mbed.h"
#include "stm32f4xx.h"
#include "stm32f4xx_hal_tim_ex.h"
//direction to PA_9 -- step pulse to PA_8
uint16_t count1;
void pulsecount(void)
{
TIM_HandleTypeDef timer;
TIM_IC_InitTypeDef ICconfiginit;
TIM_ClockConfigTypeDef counter;
TIM_SlaveConfigTypeDef SlaveModeselect;
GPIO_InitTypeDef GPIO_InitStruct;
__TIM1_CLK_ENABLE();
__GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
timer.Instance = TIM1;
timer.Init.Period = 0xffff;
timer.Init.Prescaler = 0;
timer.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
timer.Init.CounterMode = TIM_COUNTERMODE_UP;
ICconfiginit.ICFilter = 0x0f;
ICconfiginit.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
ICconfiginit.ICPrescaler = TIM_ICPSC_DIV1;
ICconfiginit.ICSelection = TIM_ICSELECTION_DIRECTTI;
counter.ClockSource = TIM_CLOCKSOURCE_TI1;
counter.ClockFilter = 0x0f;
SlaveModeselect.SlaveMode = TIM_SLAVEMODE_RESET;
SlaveModeselect.InputTrigger = TIM_TS_TI2FP2;
HAL_TIM_IC_Init(&timer);
HAL_TIM_IC_ConfigChannel(&timer, &ICconfiginit, TIM_CHANNEL_1);
HAL_TIM_ConfigClockSource(&timer, &counter);
HAL_TIM_SlaveConfigSynchronization(&timer, &SlaveModeselect); ///<<< not reset
HAL_TIM_IC_Start(&timer, TIM_CHANNEL_1);
TIM1->EGR = 1; // Generate an update event
TIM1->CR1 = 1; // Enable the counter
}
int main()
{
pulsecount();
while (1) {
count1=TIM1->CNT;
printf("%d\r\n", count1);
wait(1.0);
};
}