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?
