"I. open the file (you can download it with the text and open it in the document)（ (as shown in Figure 1 below)
Figure 1
2、 Adjust the virtual device and save the project file as（ (as shown in Figure 2, 3 and 4 below)
Figure 2
Figure 3
Figure 4
3、 Click the source code tab（ (as shown in Figure 5 below)
Figure 5
4、 Edit the codes of main. C, timer. C, timer. H, key. C, key. H, led. C and led. H, as shown in proteus8.9 simulation stm32407zgt6 Series 001 (as shown in Figure 6 below)
Figure 6
5、 Main. C code:
/* Main.c file generated by New Project wizard
* Author： Ziegler Yin
* Created: Thursday January 16 2020
* Processor: STM32F407ZGT6ZGT6
* Compiler: GCC for ARM
*/
#include ""mfuncs.h""
#include ""delay.h""
#include ""usart.h""
#include ""led.h""
#include ""key.h""
#include ""TImer.h""
#define RT(A , B) (A> 300)? ( B= 0): ( B=1)
uint32_ t gt_ fig(u8 sts){
if(1== sts) return TIM_ GetCapture1(TIM4);
if(2== sts) return TIM_ GetCapture2(TIM4);
if(3== sts) return TIM_ GetCapture3(TIM4);
if(4== sts) return TIM_ GetCapture4(TIM4);
}
void st_ fig(u8 sts, uint32_ t gt){
if(1== sts) TIM_ SetCompare1(TIM4, gt);
if(2== sts) TIM_ SetCompare2(TIM4, gt);
if(3== sts) TIM_ SetCompare3(TIM4, gt);
if(4== sts) TIM_ SetCompare4(TIM4, gt);
}
int main(void)
{
u16 psc=840, per=600, idc[4]= {500, 200, 300, 400};
u16 umd, pwmval=0;
u8 status= 0, dir= 1;
int gtln= 0;
char *wd, *wds, lnslt[5]={'_', ' A', 'B', 'C', 'D'};
NVIC_ PriorityGroupConfig(NVIC_ PriorityGroup_ 2);// Set system interrupt priority group 2
delay_ init(168); // Initialization delay function
uart_ init(9600);// The baud rate of initialization serial port is 115200
LED_ Init();
KEY_ Init();
Uprint ("" Hello everyone\ r\n"");
Let's build a ventilator\ r\n"");
LED0= LED1= LED2= 1;
Pwm_ Init(psc, per);
TIM_ SetCompare1(TIM4, idc[0]);
TIM_ SetCompare2(TIM4, idc[1]);
TIM_ SetCompare3(TIM4, idc[2]);
TIM_ SetCompare4(TIM4, idc[3]);
Uprint ("" control chip stm32f407zgt6_ 008_ PWM simulation begins\ r\n"");
delay_ ms(100);
while(1)
{
wd[0]=lnslt[status];
wd[1]= 0;
Uprint ("" arm runtime... Duty cycle "");
uprint(wd);
Uprint ("line adjustable status: \ R \ n" ");
if(1==ReadKey(GPIOC, 0x0080)) {
status++;
delay_ ms(20);
if(status> 4) status= 0;
wd[0]=lnslt[status];
wd[1]= 0;
Uprint ("" line adjustment status... Duty cycle "");
uprint(wd);
Uprint ("line adjustable status: \ R \ n" ");
}
if(1==ReadKey(GPIOC, 0x0010)) {
LED0= 1;
pwmval= gt_ fig(status);
gtln= nmtoa(wds, 10, pwmval);
if(status>0){
if(per< (pwmval+ 50)) {
Uprint ("line adjustment, duty cycle reaches the highest value... \ R \ n" ");
st_ fig(status, (per+ 1));
}
else{
LED0= 1;
pwmval= gt_ fig(status);
gtln= nmtoa(wds, 10, pwmval);
umd= pwmval +50;
Uprint ("line adjustment, duty cycle from" ");
uprint(wds);
Uprint ("" increase by 50 "");
uprint("" ...\r\n "");
st_ fig(status, umd);
}
}
}
if(1==ReadKey(GPIOC, 0x0020)) {
LED1= 1;
delay_ ms(20);
pwmval= gt_ fig(status);
gtln= nmtoa(wds, 10, pwmval);
Uprint ("" arm runtime... Duty cycle "");
uprint(wd);
Uprint ("line adjustment by" ");
uprint(wds);
Uprint ("" clear "");
uprint("" ...\r\n "");
st_ fig(status, 0);
}
if(1==ReadKey(GPIOC, 0x0040)) {
LED2= 1;
pwmval= gt_ fig(status);
gtln= nmtoa(wds, 10, pwmval);
if(pwmval> 50) umd= pwmval -50;
else umd= 1;
Uprint ("line adjustment, duty cycle from" ");
uprint(wds);
Uprint ("" reduce by 50 "");
uprint("" ...\r\n "");
st_ fig(status, umd);
}
LED0= LED1= LED2= 0;
delay_ ms(100);
}
}
Timer. C code:
#include ""mfuncs.h""
#include ""timer.h""
#include ""led.h""
void PWM_ GPIO(void){
GPIO_ InitTypeDef GPIO_ InitStructure;
RCC_ AHB1PeriphClockCmd(RCC_ AHB1Periph_ GPIOB, ENABLE);
GPIO_ InitStructure.GPIO_ Pin = GPIO_ Pin_ 5|GPIO_ Pin_ 6|GPIO_ Pin_ 7|GPIO_ Pin_ 8|GPIO_ Pin_ 9;
GPIO_ InitStructure.GPIO_ Mode = GPIO_ Mode_ AF;
GPIO_ InitStructure.GPIO_ OType = GPIO_ OType_ PP;
GPIO_ InitStructure.GPIO_ PuPd = GPIO_ PuPd_ NOPULL;
GPIO_ InitStructure.GPIO_ Speed = GPIO_ Speed_ 100MHz;
GPIO_ Init(GPIOB, &GPIO_ InitStructure);
GPIO_ PinAFConfig(GPIOB, GPIO_ PinSource5, GPIO_ AF_ TIM3);
GPIO_ PinAFConfig(GPIOB, GPIO_ PinSource6, GPIO_ AF_ TIM4);
GPIO_ PinAFConfig(GPIOB, GPIO_ PinSource7, GPIO_ AF_ TIM4);
GPIO_ PinAFConfig(GPIOB, GPIO_ PinSource8, GPIO_ AF_ TIM4);
GPIO_ PinAFConfig(GPIOB, GPIO_ PinSource9, GPIO_ AF_ TIM4);
}
//PWM timer configuration
void Pwm_ Init(u16 TimerPrescaler, u32 TimerPeriod)
{
PWM_ GPIO();
TIM_ TimeBaseInitTypeDef TIM_ TimeBaseStructure;
TIM_ OCInitTypeDef TIM_ OCInitStructure;
RCC_ APB1PeriphClockCmd(RCC_ APB1Periph_ TIM4 , ENABLE);
TIM_ TimeBaseStructure.TIM_ Prescaler = TimerPrescaler-1; // Clock prescaled frequency
TIM_ TimeBaseStructure.TIM_ CounterMode = TIM_ CounterMode_ Up; // Count up
TIM_ TimeBaseStructure.TIM_ Period = TimerPeriod-1; // The value of the auto reload register
TIM_ TimeBaseStructure.TIM_ ClockDivision = 0;
TIM_ TimeBaseStructure.TIM_ RepetitionCounter = 0; // Repeat register to automatically update PWM duty cycle
TIM_ TimeBaseInit(TIM4, &TIM_ TimeBaseStructure);
TIM_ OCInitStructure.TIM_ OCMode = TIM_ OCMode_ PWM1;
TIM_ OCInitStructure.TIM_ OutputState = TIM_ OutputState_ Enable;
TIM_ OCInitStructure.TIM_ OutputNState = TIM_ OutputNState_ Enable; // Enable this channel output
TIM_ OCInitStructure.TIM_ OCPolarity = TIM_ OCPolarity_ Low; // Set complementary output polarity
TIM_ OCInitStructure.TIM_ OCNPolarity = TIM_ OCNPolarity_ High; // Enable complementary output
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