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docs: add information about execution time of ULP instructions

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Ivan Grokhotkov
2017-12-11 12:11:24 +08:00
parent ca751648fa
commit a99483a727
3 changed files with 125 additions and 19 deletions
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9
components/soc/esp32/test/test_rtc_clk.c
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@@ -112,6 +112,15 @@ static void test_clock_switching(void (*switch_func)(rtc_cpu_freq_t))
ref_clock_deinit();
}
TEST_CASE("Calculate 8M clock frequency", "[rtc_clk]")
{
// calibrate 8M/256 clock against XTAL, get 8M/256 clock period
uint32_t rtc_8md256_period = rtc_clk_cal(RTC_CAL_8MD256, 100);
uint32_t rtc_fast_freq_hz = 1000000ULL * (1 << RTC_CLK_CAL_FRACT) * 256 / rtc_8md256_period;
printf("RTC_FAST_CLK=%d Hz\n", rtc_fast_freq_hz);
TEST_ASSERT_INT32_WITHIN(500000, RTC_FAST_CLK_FREQ_APPROX, rtc_fast_freq_hz);
}
TEST_CASE("Test switching between PLL and XTAL", "[rtc_clk]")
{
test_clock_switching(rtc_clk_cpu_freq_set);