stm32 dac驱动

stary666 · 2015-04-08T05:45:42+00:00

void 9 h# c( H$ j; P8 }5 X8 d! a4 JDAC_Init(void)+ w8 v& n. g2 n {% O- I) N5 s- w6 I z /* (1) Enable the peripheral clock of GPIOA */& `9 c+ u6 x' y5 m2 M% g7 Q& Z- @9 Q* e /* (2) Select analog mode for PA4 (reset value) */ ; O/ u* j+ b' A8 B GPIOPinInitial(ZITON_COMM_TX_PORT, : S1 Y# c# ~; N ZITON_COMM_TX_PIN_NUMBER, ; M, g% V( A, }: Q/ d GPIO_MOD_ANALOG_FUNCTION,* O7 b4 l: J! }/ C! E GPIO_NOPUPD); : ~. U1 h! R2 q/ Z7 f/ `+ e2 o /* (1) Enable the peripheral clock of the DAC */ 6 v5 l2 h- ~4 G% d9 r: }8 e /* (2) Enable the DAC ch1 */- z! M( Q4 b* u9 W; H /* (3) disable the DAC ch1 */0 f7 o( M# Z$ F9 S& _4 d- Q RCC->APB1ENR |= RCC_APB1ENR_DACEN; /* (1) */ $ Z( K: _! a ^4 w8 N% g$ j9 [) k8 ~ DAC->CR |= DAC_CR_EN1 | DAC_CR_BOFF1; /* (2) */ + F% `+ r" s; E; d1 B #if 0 1 F4 l3 P% ^; U/ U' h, W' `4 [1 d DAC->CR &= ~DAC_CR_EN1; /* (3) */ 5 R5 q) D6 R. C #endif ! X/ W6 Y" h! O* t3 V}

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stary666 发布时间：2015-4-8 13:45

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void
DAC_Init(void)
{
/* (1) Enable the peripheral clock of GPIOA */
/* (2) Select analog mode for PA4 (reset value) */
GPIOPinInitial(ZITON_COMM_TX_PORT,
               ZITON_COMM_TX_PIN_NUMBER,
               GPIO_MOD_ANALOG_FUNCTION,
               GPIO_NOPUPD);
/* (1) Enable the peripheral clock of the DAC */
/* (2) Enable the DAC ch1 */
/* (3) disable the DAC ch1 */
RCC->APB1ENR |= RCC_APB1ENR_DACEN;       /* (1) */
DAC->CR    |=  DAC_CR_EN1 | DAC_CR_BOFF1; /* (2) */
#if 0
DAC->CR    &=  ~DAC_CR_EN1;             /* (3) */
#endif
}