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ledc: Add support for esp32h2; Refactor ledc driver clock source selection related code

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LEDC examples and test cases are supported on ESP32H2.
   Switch to use general clock IDs for ledc_clk_cfg_t enum values.
   Deprecate LEDC_USE_RTC8M_CLK.
This commit is contained in:
Song Ruo Jing
2023-01-24 01:54:34 +08:00
parent 375aaf8e7b
commit ad55230b0a
34 changed files with 1078 additions and 336 deletions
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4
components/driver/test_apps/ledc/README.md
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@@ -1,2 +1,2 @@
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-S2 | ESP32-S3 |
| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- |
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-S2 | ESP32-S3 |
| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- |

36
components/driver/test_apps/ledc/main/test_ledc.c
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@@ -20,8 +20,9 @@
#include "esp_timer.h"
#include "driver/ledc.h"
#include "soc/ledc_struct.h"
#include "clk_tree.h"
#define PULSE_IO 18
#define PULSE_IO 5
#define TEST_PWM_FREQ 2000
@@ -438,13 +439,13 @@ static int wave_count(int last_time)
}
// the PCNT will count the frequency of it
static void frequency_set_get(ledc_mode_t speed_mode, ledc_timer_t timer, uint32_t freq_hz, int16_t real_freq, int16_t error)
static void frequency_set_get(ledc_mode_t speed_mode, ledc_timer_t timer, uint32_t desired_freq, int16_t theoretical_freq, int16_t error)
{
int count;
TEST_ESP_OK(ledc_set_freq(speed_mode, timer, freq_hz));
count = wave_count(1000);
TEST_ASSERT_INT16_WITHIN(error, real_freq, count);
TEST_ASSERT_EQUAL_INT32(real_freq, ledc_get_freq(speed_mode, timer));
int real_freq;
TEST_ESP_OK(ledc_set_freq(speed_mode, timer, desired_freq));
real_freq = wave_count(1000);
TEST_ASSERT_INT16_WITHIN(error, theoretical_freq, real_freq);
TEST_ASSERT_EQUAL_INT32(theoretical_freq, ledc_get_freq(speed_mode, timer));
}
static void timer_frequency_test(ledc_channel_t channel, ledc_timer_bit_t timer_bit, ledc_timer_t timer, ledc_mode_t speed_mode)
@@ -469,7 +470,16 @@ static void timer_frequency_test(ledc_channel_t channel, ledc_timer_bit_t timer_
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 100, 100, 20);
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 5000, 5000, 50);
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 9000, 8992, 50);
// Try a frequency that couldn't be exactly achieved, requires rounding
uint32_t theoretical_freq = 9000;
uint32_t clk_src_freq = 0;
clk_tree_src_get_freq_hz((soc_module_clk_t)TEST_DEFAULT_CLK_CFG, CLK_TREE_SRC_FREQ_PRECISION_EXACT, &clk_src_freq);
if (clk_src_freq == 80 * 1000 * 1000) {
theoretical_freq = 8992;
} else if (clk_src_freq == 96 * 1000 * 1000) {
theoretical_freq = 9009;
}
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 9000, theoretical_freq, 50);
}
TEST_CASE("LEDC set and get frequency", "[ledc][timeout=60]")
@@ -500,8 +510,8 @@ static void timer_set_clk_src_and_freq_test(ledc_mode_t speed_mode, ledc_clk_cfg
};
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(100 / portTICK_PERIOD_MS);
if (clk_src == LEDC_USE_RTC8M_CLK) {
// RTC8M_CLK freq is get from calibration, it is reasonable that divider calculation does a rounding
if (clk_src == LEDC_USE_RC_FAST_CLK) {
// RC_FAST_CLK freq is get from calibration, it is reasonable that divider calculation does a rounding
TEST_ASSERT_UINT32_WITHIN(5, freq_hz, ledc_get_freq(speed_mode, LEDC_TIMER_0));
} else {
TEST_ASSERT_EQUAL_INT32(freq_hz, ledc_get_freq(speed_mode, LEDC_TIMER_0));
@@ -526,8 +536,10 @@ TEST_CASE("LEDC timer select specific clock source", "[ledc]")
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
if (test_speed_mode == LEDC_LOW_SPEED_MODE) {
printf("Check LEDC_USE_RTC8M_CLK for a 100Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_RTC8M_CLK, 10, 100);
#if SOC_CLK_RC_FAST_SUPPORT_CALIBRATION // Otherwise, the frequency of output PWM signal may not be very accurate
printf("Check LEDC_USE_RC_FAST_CLK for a 100Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_RC_FAST_CLK, 10, 100);
#endif
#if SOC_LEDC_SUPPORT_XTAL_CLOCK
printf("Check LEDC_USE_XTAL_CLK for a 400Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_XTAL_CLK, 13, 400);