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hal/stm32n6: initialize dtcm #427

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Merged
jakubsmolaga merged 1 commit into from
May 8, 2026
Merged

hal/stm32n6: initialize dtcm #427

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17 changes: 17 additions & 0 deletions hal/armv8m/stm32/n6/stm32n6.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1038,6 +1038,22 @@ static void _stm32_initSRAM(void)
}


/* Zero out contents of DTCM using word size writes - this initializes ECC values in the memory */
static void _stm32_initDTCM(void)
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jmaksymowicz marked this conversation as resolved.
{
u32 cfgdtcmsz, size, i;

volatile u32 *const dtcm = (volatile u32 *)0x30000000;

cfgdtcmsz = (*(stm32_common.syscfg + syscfg_cm55tcmcr) >> 4) & 0xf;
size = 1 << (cfgdtcmsz + 9);

for (i = 0; i < size / 4; i++) {
dtcm[i] = 0U;
}
}
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jmaksymowicz marked this conversation as resolved.


void _stm32_initHalOnly(void)
{
stm32_common.iwdg = IWDG_BASE;
Expand Down Expand Up @@ -1108,6 +1124,7 @@ void _stm32_init(void)
_stm32_rccSetDevClock(dev_per, 0);

_stm32_initSRAM();
_stm32_initDTCM();

/* Enable independent power supplies for GPIOs. */
_stm32_pwrSupplyInit(pwr_supply_vddio2); /* PO[5:0], PP[15:0] */
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