Posted on September 19, 2016 at 16:09
I have code that rotates small motor.
#include ''stm32f10x.h''
#include ''stm32f10x_gpio.h''
#include ''stm32f10x_rcc.h''
#include ''stm32f10x_usart.h''
void Delay(unsigned int t) {
unsigned int i;
for (i = 0; i < t; i++)
;
}
void RotateToLeft() {
const int time = 20000;
uint16_t steps[8];
steps[0] = GPIO_Pin_5;
steps[1] = GPIO_Pin_5 | GPIO_Pin_3;
steps[2] = GPIO_Pin_3;
steps[3] = GPIO_Pin_3 | GPIO_Pin_7;
steps[4] = GPIO_Pin_7;
steps[5] = GPIO_Pin_7 | GPIO_Pin_1;
steps[6] = GPIO_Pin_1;
steps[7] = GPIO_Pin_1 | GPIO_Pin_5;
for (int i = 0; i < 8; i++) {
GPIO_Write(GPIOC, steps[i]);
Delay(time);
}
}
int main(void) {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitTypeDef gpio_port;
gpio_port.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_3 | GPIO_Pin_5 | GPIO_Pin_7;
gpio_port.GPIO_Mode = GPIO_Mode_Out_PP;
gpio_port.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &gpio_port);
while (1) //Бе�?конечный цикл в нем мы провер�?ем ...
{
RotateToLeft();
}
}
I want to rewrite this code using TIM2 times. I found example of PWM modulation that using 3 pins.
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
GPIO_InitTypeDef PORT;
PORT.GPIO_Pin = (GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3);
PORT.GPIO_Mode = GPIO_Mode_AF_PP;
PORT.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &PORT);
TIM2->CCER |= (TIM_CCER_CC2E|TIM_CCER_CC3E|TIM_CCER_CC4E);
TIM2->CCMR1|=(TIM_CCMR1_OC2M_0| TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2);
TIM2->CCMR2|=(TIM_CCMR2_OC3M_0 | TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC4M_0 | TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2);
TIM2->CR1 |= TIM_CR1_CEN;
But in my case I need to generate PWM on 4 pins. But how to do that?
