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support h2 eco2 fosc calibration

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This commit is contained in:
hongshuqing 2023-04-26 15:31:18 +08:00
parent 5d222db12f
commit cbc5a38e26
3 changed files with 29 additions and 0 deletions
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3
components/esp_hw_support/port/esp32h2/rtc_clk_init.c
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@ -19,6 +19,7 @@
#include "esp_hw_log.h"
#include "sdkconfig.h"
#include "esp_rom_uart.h"
#include "hal/clk_tree_ll.h"
static const char *TAG = "rtc_clk_init";
@ -39,6 +40,8 @@ void rtc_clk_init(rtc_clk_config_t cfg)
REGI2C_WRITE_MASK(I2C_PMU, I2C_PMU_OC_SCK_DCAP, cfg.slow_clk_dcap);
REG_SET_FIELD(LP_CLKRST_RC32K_CNTL_REG, LP_CLKRST_RC32K_DFREQ, cfg.rc32k_dfreq);
clk_ll_rc_fast_tick_conf();
rtc_xtal_freq_t xtal_freq = cfg.xtal_freq;
esp_rom_uart_tx_wait_idle(0);
rtc_clk_xtal_freq_update(xtal_freq);

11
components/esp_hw_support/port/esp32h2/rtc_time.c
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@ -12,6 +12,8 @@
#include "soc/timer_group_reg.h"
#include "esp_rom_sys.h"
#include "assert.h"
#include "hal/efuse_hal.h"
#include "soc/chip_revision.h"
static const char *TAG = "rtc_time";
@ -129,6 +131,15 @@ uint32_t rtc_clk_cal_internal(rtc_cal_sel_t cal_clk, uint32_t slowclk_cycles)
while (true) {
if (GET_PERI_REG_MASK(TIMG_RTCCALICFG_REG(0), TIMG_RTC_CALI_RDY)) {
cal_val = REG_GET_FIELD(TIMG_RTCCALICFG1_REG(0), TIMG_RTC_CALI_VALUE);
/*The Fosc CLK of calibration circuit is divided by 32 for ECO2.
So we need to multiply the frequency of the Fosc for ECO2 and above chips by 32 times.
And ensure that this modification will not affect ECO0 and ECO1.*/
if (ESP_CHIP_REV_ABOVE(efuse_hal_chip_revision(), 2)) {
if (cal_clk == RTC_CAL_RC_FAST) {
cal_val = cal_val >> 5;
}
}
break;
}
if (GET_PERI_REG_MASK(TIMG_RTCCALICFG2_REG(0), TIMG_RTC_CALI_TIMEOUT)) {

15
components/hal/esp32h2/include/hal/clk_tree_ll.h
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@ -39,6 +39,13 @@ extern "C" {
.dbuf = 1, \
}
/*
Set the frequency division factor of ref_tick
The FOSC of rtc calibration uses the 32 frequency division clock for ECO2,
So the frequency division factor of ref_tick must be greater than or equal to 32
*/
#define REG_FOSC_TICK_NUM 255
/**
* @brief XTAL32K_CLK enable modes
*/
@ -735,6 +742,14 @@ static inline __attribute__((always_inline)) uint32_t clk_ll_rtc_slow_load_cal(v
return REG_READ(RTC_SLOW_CLK_CAL_REG);
}
/*
Set the frequency division factor of ref_tick
*/
static inline void clk_ll_rc_fast_tick_conf(void)
{
PCR.ctrl_tick_conf.fosc_tick_num = REG_FOSC_TICK_NUM;
}
#ifdef __cplusplus
}
#endif