test: driver/sigmadelta test case

components/driver/test/test_sigmadelta.c

@@ -0,0 +1,87 @@
+/*
+ * Sigamadelta Test:
+ * 1. basic configuration test
+ * 2. pin, duty, prescale test
+ */
+#include "unity.h"
+#include "test_utils.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/sigmadelta.h"
+
+TEST_CASE("SigmaDelta config test", "[sigma_delta]")
+{
+    sigmadelta_config_t sigmadelta_cfg = {
+        .channel = SIGMADELTA_CHANNEL_0,
+        .sigmadelta_prescale = 80,
+        .sigmadelta_duty = 45,
+        .sigmadelta_gpio = 4,
+    };
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_1;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_2;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_3;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_4;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_5;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_6;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_7;
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+     //ERROR PARAM
+    sigmadelta_cfg.channel = SIGMADELTA_CHANNEL_MAX;
+    TEST_ASSERT(sigmadelta_config(&sigmadelta_cfg) == ESP_ERR_INVALID_ARG);
+
+}
+
+// connect GPIO4 with LED positive pin, and the GND pin connect LED negative pin
+// logic analyzer help also to see the wave form(more standard and accurate)
+// can't test it in CI, ignore
+TEST_CASE("SigmaDelta pin, duty, prescale set", "[sigma_delta][ignore]")
+{
+    sigmadelta_config_t sigmadelta_cfg = {
+        .channel = SIGMADELTA_CHANNEL_0,
+        .sigmadelta_prescale = 80,
+        .sigmadelta_duty = 0,
+        .sigmadelta_gpio = 4,
+    };
+    TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
+
+    int8_t duty = 0;
+    int inc = 1;
+    for(int i=0; i<1000; i++) {
+        sigmadelta_set_duty(SIGMADELTA_CHANNEL_0, duty);
+        vTaskDelay(10 / portTICK_PERIOD_MS);
+
+        duty += inc;
+        if (duty == 127 || duty == -127) {
+            inc = (-1) * inc;
+        }
+    }
+
+    TEST_ESP_OK(sigmadelta_set_prescale(SIGMADELTA_CHANNEL_0, 200));
+    for(int i=0; i<1000; i++) {
+        sigmadelta_set_duty(SIGMADELTA_CHANNEL_0, duty);
+        vTaskDelay(10 / portTICK_PERIOD_MS);
+
+        duty += inc;
+        if (duty == 127 || duty == -127) {
+            inc = (-1) * inc;
+        }
+    }
+
+    TEST_ESP_OK(sigmadelta_set_pin(SIGMADELTA_CHANNEL_0, 5));
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+}