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stm32_timer_pwm_computer
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master
zhaohe 3 years ago
parent
47bb7cc9e5
commit
ceface6d25
3 changed files with 33 additions and 53 deletions
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  1. 53
      linux/main.c
  2. BIN
      release/stm32_pwm_computer.exe
  3. 33
      windows/stm32_pwm_computer.cpp

53
linux/main.c
View File

@ -52,14 +52,14 @@ typedef struct
float realfreq;
} timer_config_t;
bool compute_timer_parameter(timer_config_t *config, int timer_in_clk /*mhz*/, int infreq /*hz*/)
bool compute_timer_parameter(timer_config_t* config, int timer_in_clk /*mhz*/, int infreq /*hz*/)
{
float psc_x_arr = timer_in_clk * 1000 /*定时器模块时钟*/ * 1000 / infreq;
float psc_x_arr =(float) timer_in_clk * 1000 /*定时器模块时钟*/ * 1000 / infreq;
uint32_t psc = 0;
uint32_t arr = 65534;
for (; arr > 2; arr--)
{
psc = psc_x_arr / arr;
psc =(uint32_t)( psc_x_arr / arr);
if (psc >= 1)
{
uint32_t tmparr = psc_x_arr / psc;
@ -72,7 +72,6 @@ bool compute_timer_parameter(timer_config_t *config, int timer_in_clk /*mhz*/, i
return false;
if (arr <= 3)
return false; //定时器一周期的分辨率太小了
arr = psc_x_arr / psc;
int psc_x_arr_real = arr * psc;
@ -85,58 +84,52 @@ bool compute_timer_parameter(timer_config_t *config, int timer_in_clk /*mhz*/, i
config->prescaler = psc;
config->realfreq = realfreq;
// config->compare = arr / 2;
return false;
}
void dumpconfig_info(timer_config_t *config)
void dumpconfig_info(timer_config_t* config)
{
printf("* freq : %f \n", config->realfreq);
printf("* prescaler : %d \n", config->prescaler);
printf("* autoreload: %d \n", config->autoreload);
}
int main(int argc, char const *argv[])
int main(int argc, char const* argv[])
{
if (argc != 3)
{
printf("%s system_clk mhz expect_freq khz\n", argv[0]);
printf("%s timerInClk mhz expect_freq khz\n", argv[0]);
return -1;
}
float expect_freq = 0;
float systemclk = 0;
sscanf(argv[1], "%f", &systemclk);
float timerInClk = 0;
sscanf(argv[1], "%f", &timerInClk);
sscanf(argv[2], "%f", &expect_freq);
printf("systemclk : %f mhz\n", systemclk);
printf("expect freq: %f khz\n", expect_freq);
printf("******************************************************\n");
printf("* author: zhaohe *\n");
printf("* e-mail: h_zhaohe@163.com *\n");
printf("******************************************************\n");
printf("*\n");
printf("* timerInClk : %f mhz\n", timerInClk);
printf("* expect freq: %f khz\n", expect_freq);
printf("*\n");
int32_t infreq = (int32_t)(expect_freq * 1000);
timer_config_t timerconfig_apb1;
timer_config_t timerconfig_apb2;
//apb1
compute_timer_parameter(&timerconfig_apb1, systemclk / 2, infreq);
//apb2
compute_timer_parameter(&timerconfig_apb2, systemclk, infreq);
compute_timer_parameter(&timerconfig_apb2, timerInClk, infreq);
printf("******************************************************\n");
printf("* APB1: TIM2 TIM3 TIM4 TIM5 TIM6 TIM7 TIM12 TIM13 TIM14\n");
printf("*\n");
printf("* timer_module_clk: %f mhz\n", systemclk / 2);
printf("* freq : %f khz\n", timerconfig_apb1.realfreq / 1000.0);
printf("* period : %f ms\n", (1.0 / timerconfig_apb1.realfreq * 1000));
printf("* prescaler : %d \n", timerconfig_apb1.prescaler);
printf("* autoreload : %d \n", timerconfig_apb1.autoreload);
printf("*\n");
printf("**\n");
printf("* APB2: TIM1 TIM8 TIM9 TIM10 TIM11\n");
printf("*\n");
printf("* timer_module_clk: %f mhz\n", systemclk);
printf("* timer_module_clk: %f mhz\n", timerInClk);
printf("* freq : %f khz\n", timerconfig_apb2.realfreq / 1000.0);
printf("* period : %f ms\n", (1.0 / timerconfig_apb2.realfreq * 1000));
printf("* prescaler : %d \n", timerconfig_apb2.prescaler);
printf("* autoreload : %d \n", timerconfig_apb2.autoreload);
printf("***\n");
printf("*\n");
return 0;
}
}

BIN
release/stm32_pwm_computer.exe
View File

33
windows/stm32_pwm_computer.cpp
View File

@ -56,51 +56,38 @@ int main(int argc, char const* argv[])
{
if (argc != 3)
{
printf("%s system_clk mhz expect_freq khz\n", argv[0]);
printf("%s timerInClk mhz expect_freq khz\n", argv[0]);
return -1;
}
float expect_freq = 0;
float systemclk = 0;
float timerInClk = 0;
sscanf(argv[1], "%f", &systemclk);
sscanf(argv[1], "%f", &timerInClk);
sscanf(argv[2], "%f", &expect_freq);
printf("******************************************************\n");
printf("* author: 赵贺 *\n");
printf("* e-mail: zhaohe@163.net *\n");
printf("* author: zhaohe *\n");
printf("* e-mail: h_zhaohe@163.com *\n");
printf("******************************************************\n");
printf("*\n");
printf("* systemclk : %f mhz\n", systemclk);
printf("* timerInClk : %f mhz\n", timerInClk);
printf("* expect freq: %f khz\n", expect_freq);
printf("*\n");
int32_t infreq = (int32_t)(expect_freq * 1000);
timer_config_t timerconfig_apb1;
timer_config_t timerconfig_apb2;
//apb1
compute_timer_parameter(&timerconfig_apb1, systemclk / 2, infreq);
//apb2
compute_timer_parameter(&timerconfig_apb2, systemclk, infreq);
compute_timer_parameter(&timerconfig_apb2, timerInClk, infreq);
printf("******************************************************\n");
printf("* APB1: TIM2 TIM3 TIM4 TIM5 TIM6 TIM7\n");
printf("* TIM12 TIM13 TIM14 \n");
printf("*\n");
printf("* timer_module_clk: %f mhz\n", systemclk / 2);
printf("* freq : %f khz\n", timerconfig_apb1.realfreq / 1000.0);
printf("* period : %f ms\n", (1.0 / timerconfig_apb1.realfreq * 1000));
printf("* prescaler : %d \n", timerconfig_apb1.prescaler);
printf("* autoreload : %d \n", timerconfig_apb1.autoreload);
printf("*\n");
printf("* APB2: TIM1 TIM8 TIM9 TIM10 TIM11\n");
printf("*\n");
printf("* timer_module_clk: %f mhz\n", systemclk);
printf("* timer_module_clk: %f mhz\n", timerInClk);
printf("* freq : %f khz\n", timerconfig_apb2.realfreq / 1000.0);
printf("* period : %f ms\n", (1.0 / timerconfig_apb2.realfreq * 1000));
printf("* prescaler : %d \n", timerconfig_apb2.prescaler);
printf("* autoreload : %d \n", timerconfig_apb2.autoreload);
printf("******************************************************\n");
printf("*\n");
return 0;
}
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