STM32F407 寄存器版本的的PWM也输不出PWM波形

ddfha1 · 发表于 2024-2-28 22:25:48

原子哥，我用STM32F407寄存器版本输出PWNM，也输不出PWM波形
#define PWMDAC_GPIO_PORT                   GPIOA
#define PWMDAC_GPIO_PIN1                   SYS_GPIO_PIN6
#define PWMDAC_GPIO_AF                   1                                     // AF1|ÄüÑ¡Ôñ
#define PWMDAC_GPIO_CLK_ENABLE1()          do{ RCC->AHB1ENR |= 1 << 0; }while(0) // PA¿úê±Öóê1Äü

#define PWMDAC_TIMX                      TIM3
#define PWMDAC_TIMX_CHY1                   1                         // í¨μàY,  1<= Y <=4
#define PWMDAC_TIMX_CCRX1                   PWMDAC_TIMX->CCR1          // í¨μàYμÄêä3ö±è½Ï¼Ä′æÆ÷
#define PWMDAC_TIMX_CLK_ENABLE1()          do{ RCC->APB1ENR |= 1 << 0; }while(0) // TIM2 ê±Öóê1Äü

#define PWMDAC_GPIO_PORT                   GPIOA
#define PWMDAC_GPIO_PIN2                   SYS_GPIO_PIN7
#define PWMDAC_GPIO_AF                   1                                     // AF1|ÄüÑ¡Ôñ
#define PWMDAC_GPIO_CLK_ENABLE2()          do{ RCC->AHB1ENR |= 1 << 0; }while(0) // PA¿úê±Öóê1Äü

#define PWMDAC_TIMX                      TIM3
#define PWMDAC_TIMX_CHY2                   2                         // í¨μàY,  1<= Y <=4
#define PWMDAC_TIMX_CCRX2                   PWMDAC_TIMX->CCR2          // í¨μàYμÄêä3ö±è½Ï¼Ä′æÆ÷
#define PWMDAC_TIMX_CLK_ENABLE2()          do{ RCC->APB1ENR |= 1 << 0; }while(0) // TIM2 ê±Öóê1Äü

void pwmdac_init(uint16_t arr, uint16_t psc)
{
uint8_t chy = PWMDAC_TIMX_CHY1;
PWMDAC_GPIO_CLK_ENABLE1();    /* PWM DAC GPIO ê±Öóê1Äü */
PWMDAC_TIMX_CLK_ENABLE1();    /* PWM DAC ¶¨ê±Æ÷ê±Öóê1Äü */
PWMDAC_GPIO_CLK_ENABLE2();    /* PWM DAC GPIO ê±Öóê1Äü */
PWMDAC_TIMX_CLK_ENABLE2();    /* PWM DAC ¶¨ê±Æ÷ê±Öóê1Äü */

sys_gpio_set(PWMDAC_GPIO_PORT, PWMDAC_GPIO_PIN1,
               SYS_GPIO_MODE_AF, SYS_GPIO_OTYPE_PP, SYS_GPIO_SPEED_HIGH, SYS_GPIO_PUPD_PU); /* TIMX PWM CHY òy½ÅÄ￡ê½éèÖÃ */

sys_gpio_af_set(PWMDAC_GPIO_PORT, PWMDAC_GPIO_PIN1, PWMDAC_GPIO_AF); /* IO¿ú¸′óÃ1|ÄüÑ¡Ôñ ±ØDëéèÖÃ¶Ô!! */

   sys_gpio_set(PWMDAC_GPIO_PORT, PWMDAC_GPIO_PIN2,
               SYS_GPIO_MODE_AF, SYS_GPIO_OTYPE_PP, SYS_GPIO_SPEED_HIGH, SYS_GPIO_PUPD_PU); /* TIMX PWM CHY òy½ÅÄ￡ê½éèÖÃ */

sys_gpio_af_set(PWMDAC_GPIO_PORT, PWMDAC_GPIO_PIN2, PWMDAC_GPIO_AF); /* IO¿ú¸′óÃ1|ÄüÑ¡Ôñ ±ØDëéèÖÃ¶Ô!! */

PWMDAC_TIMX->ARR = arr;       /* éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ */
PWMDAC_TIMX->

SC = psc; /* éèÖÃÔ¤·ÖÆμÆ÷ */
PWMDAC_TIMX->BDTR |= 1 << 15; /* ê1ÄüMOEÎ»(½öTIM1/8 óD′Ë¼Ä′æÆ÷,±ØDëéèÖÃMOE2ÅÄüêä3&#246

WM), ÆäËûí¨óÃ¶¨ê±Æ÷, Õa¸ö
                                 * ¼Ä′æÆ÷êÇÎTD§μÄ, ËùòÔéèÖÃ/2»éèÖÃ2￠2»ó°Ïì½á1û, ÎaáË¼æèYÕaàïí3ò»¸Ä3ééèÖÃMOEÎ»
                                 */

if (chy <= 2)
{
      PWMDAC_TIMX->CCMR1 |= 6 << (4 + 8 * (chy - 1)); /* CH1/2 PWMÄ￡ê½1 */
      PWMDAC_TIMX->CCMR1 |= 1 << (3 + 8 * (chy - 1)); /* CH1/2 Ô¤×°ÔØê1Äü */
}
else if (chy <= 4)
{
      PWMDAC_TIMX->CCMR2 |= 6 << (4 + 8 * (chy - 3)); /* CH3/4 PWMÄ￡ê½1 */
      PWMDAC_TIMX->CCMR2 |= 1 << (3 + 8 * (chy - 3)); /* CH3/4 Ô¤×°ÔØê1Äü */
}

PWMDAC_TIMX->CCER |= 1 << (4 * (chy - 1));    /* OCy êä3öê1Äü */
PWMDAC_TIMX->CCER |= 0 << (1 + 4 * (chy - 1));  /* OCy ¸ßμçÆ½óDD§ */
PWMDAC_TIMX->CR1 |= 1 << 7;    /* ARPEê1Äü */
PWMDAC_TIMX->CR1 |= 1 << 0;    /* ê1Äü¶¨ê±Æ÷TIMX */
}

这程序哪里设置的不对，就是数不出PWM波形

ddfha1 · 发表于 2024-2-28 22:27:42

void pwmdac_set_voltage1(uint16_t vol)
{
double temp = vol;
temp /= 100; /* ËõD¡100±¶, μÃμ½êμ¼êμçÑ1Öμ */
temp = temp * 256 / 3.3; /* ½«μçÑ1×a»»3éPWMÕ¼¿Õ±è */
PWMDAC_TIMX_CCRX1 = temp; /* éèÖÃDÂμÄÕ¼¿Õ±è */
}

void pwmdac_set_voltage2(uint16_t vol)
{
double temp = vol;
temp /= 100; /* ËõD¡100±¶, μÃμ½êμ¼êμçÑ1Öμ */
temp = temp * 256 / 3.3; /* ½«μçÑ1×a»»3éPWMÕ¼¿Õ±è */
PWMDAC_TIMX_CCRX2 = temp; /* éèÖÃDÂμÄÕ¼¿Õ±è */
}

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STM32F407 寄存器版本的的PWM也输不出PWM波形

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