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fix(ulp): use SoC RC_FAST frequency for LP core delay

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Use the target RC_FAST approximation for LP core delay conversion.
This prevents ESP32-S31 from under-delaying when running from RC_FAST.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Marius Vikhammer
2026-06-18 11:46:23 +08:00
parent f82a0593e0
commit 6e12910f8e
1 changed files with 4 additions and 3 deletions
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7
components/ulp/lp_core/shared/include/ulp_lp_core_cpu_freq_shared.h
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@@ -6,13 +6,14 @@
#pragma once
#include "sdkconfig.h"
#include "soc/clk_tree_defs.h"
#include "soc/soc_caps.h"
/* LP_FAST_CLK is not very accurate, for now use a rough estimate */
#if CONFIG_RTC_FAST_CLK_SRC_RC_FAST
#define LP_CORE_CPU_FREQUENCY_HZ 16000000U /* For P4 TRM says 20 MHz by default, but we tune it closer to 16 MHz */
#define LP_CORE_CYCLES_PER_US_NUM 16U
#define LP_CORE_CYCLES_PER_US_DENOM 1U
#define LP_CORE_CPU_FREQUENCY_HZ SOC_CLK_RC_FAST_FREQ_APPROX
#define LP_CORE_CYCLES_PER_US_NUM (SOC_CLK_RC_FAST_FREQ_APPROX / 500000U)
#define LP_CORE_CYCLES_PER_US_DENOM 2U
#elif CONFIG_RTC_FAST_CLK_SRC_XTAL
#if SOC_XTAL_SUPPORT_48M
#define LP_CORE_CPU_FREQUENCY_HZ 48000000U