LPC5536 DAC problem

SilentBob — Mon, 04 Jul 2022 08:15:41 GMT

Hello,

I try to create own configuration routine for DAC0 of LPC5536. I derive the configuration routine from the driver example "lpcxpresso55s36_dac_1_basic".

Now I encountered the following problem. In a code line of my configuration routine

PMC->PDRUNCFGCLR1 = PMC_PDRUNCFG1_PDEN_DAC0_MASK; // 0b - DAC0 is powered

the debug session crashes.

Unfortunately I can't find the error. In the driver example there is not this problem.

void DAC0_init(void)

{

uint32_t tmp32 = 0U;

LPDAC_Type *base = DAC0;

/* Set IP Clock Divider */

SYSCON->DAC[0].CLKDIV = SYSCON_DAC_CLKDIV_RESET_MASK; // reset DAC

SYSCON->DAC[0].CLKDIV = SYSCON_DAC_CLKDIV_DIV(0U); // DIV=1

/* Clock Selection for IP */

SYSCON->DAC[0].CLKSEL = SYSCON_DAC_CLKSEL_SEL(0U); // select main clock

/* Disable DAC0 power down */

PMC->PDRUNCFGCLR1 = PMC_PDRUNCFG1_PDEN_DAC0_MASK; // 0b - DAC0 is powered

/* Enable the clock. */

SYSCON->AHBCLKCTRLSET[0] = SYSCON_AHBCLKCTRL0_DAC0_MASK; // Enables the clock for DAC0.

/* Reset the logic. */

base->RCR |= LPDAC_RCR_SWRST_MASK; // Resets all DAC registers and internal logic.

base->RCR &= ~LPDAC_RCR_SWRST_MASK; // Remains set until cleared by software.

/* Reset the FIFO. */

base->RCR |= LPDAC_RCR_FIFORST_MASK; // Resets the FIFO pointers and flags in register FSR.

base->RCR &= ~LPDAC_RCR_FIFORST_MASK; // Remains set until cleared by software.

tmp32 |= LPDAC_GCR_BUF_SPD_CTRL_MASK; // Enable low power.

tmp32 |= LPDAC_GCR_LATCH_CYC(0U); // The recommended sync time is at least 40ns. (25MHz => 40ns)

tmp32 |= LPDAC_GCR_IREF_PTAT_EXT_SEL(1U); // External PTAT current reference selected

tmp32 |= LPDAC_GCR_DACRFS(0U); // VREFH1 = VDDA supply rail

// tmp32 |= LPDAC_GCR_BUF_EN_MASK; // Opamp is used as buffer. (Disable for fast settling time)

tmp32 |= LPDAC_GCR_DACEN_MASK; // Enable the DAC hardware system

base->GCR = tmp32;

base->FCR = LPDAC_FCR_WML(0U); // Watermark Level for FIFO

/* Reset DAC0 */

// SYSCON->PRESETCTRLSET[0] = SYSCON_PRESETCTRL0_DAC0_RST_MASK;

// SYSCON->PRESETCTRLCLR[0] = SYSCON_PRESETCTRL0_DAC0_RST_MASK;

}

void DAC0_setData(uint32_t value)

{

LPDAC_Type *base = DAC0;

base->DATA = LPDAC_DATA_DATA(value);

}

Please can someone help me to find the problem?

Re: LPC5536 DAC problem

Alice_Yang — Tue, 05 Jul 2022 10:02:47 GMT

Hello,

How about debug DAC demo under SDK?

topic LPC5536 DAC problem in LPC Microcontrollers

LPC5536 DAC problem

Re: LPC5536 DAC problem