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esp_clk.h: add esp_clk_xtal_freq

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This adds a user API for getting the XTAL frequency
This commit is contained in:
Ivan Grokhotkov
2018-07-29 09:34:49 +03:00
parent ccd0c61ea1
commit 05a5410033
2 changed files with 18 additions and 2 deletions
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9
components/esp32/clk.c
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@@ -109,12 +109,17 @@ void esp_clk_init(void)
int IRAM_ATTR esp_clk_cpu_freq(void) int IRAM_ATTR esp_clk_cpu_freq(void)
{ {
return g_ticks_per_us_pro * 1000000; return g_ticks_per_us_pro * MHZ;
} }
int IRAM_ATTR esp_clk_apb_freq(void) int IRAM_ATTR esp_clk_apb_freq(void)
{ {
return MIN(g_ticks_per_us_pro, 80) * 1000000; return MIN(g_ticks_per_us_pro, 80) * MHZ;
}
int IRAM_ATTR esp_clk_xtal_freq(void)
{
return rtc_clk_xtal_freq_get() * MHZ;
} }
void IRAM_ATTR ets_update_cpu_frequency(uint32_t ticks_per_us) void IRAM_ATTR ets_update_cpu_frequency(uint32_t ticks_per_us)

11
components/esp32/include/esp_clk.h
View File

@@ -62,6 +62,17 @@ int esp_clk_cpu_freq(void);
*/ */
int esp_clk_apb_freq(void); int esp_clk_apb_freq(void);
/**
* @brief Return frequency of the main XTAL
*
* Frequency of the main XTAL can be either auto-detected or set at compile
* time (see CONFIG_ESP32_XTAL_FREQ_SEL sdkconfig option). In both cases, this
* function returns the actual value at run time.
*
* @return XTAL frequency, in Hz
*/
int esp_clk_xtal_freq(void);
/** /**
* @brief Read value of RTC counter, converting it to microseconds * @brief Read value of RTC counter, converting it to microseconds