[example] dds

feat: 1. updated uvw duty cycle every 41.6us (24KHz) 2. EPWM->CCMRn_OUTPUT_b.OCnPE=1
2026-03-20 15:30:52 +08:00
parent f53cc9df17
commit 7aeffa6b70
12 changed files with 847 additions and 0 deletions
@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) 2026 Wisetop. All Rights Reserved.
+ */
+/** @file main.c
+ *
+ * @author Roy Luo
+ * @version 0.1
+ * @date 2026/03/20
+ * @license
+ * @description
+ */
+
+#include "main.h"
+#include "hal_gpio.h"
+#include "hal_tim.h"
+#include "init.h"
+#include "isr.h"
+//=============================================================================
+//                  Constant Definition
+//=============================================================================
+
+//=============================================================================
+//                  Macro Definition
+//=============================================================================
+#define PWM_TABLE_SIZE 64
+//=============================================================================
+//                  Structure Definition
+//=============================================================================
+
+//=============================================================================
+//                  Global Data Definition
+//=============================================================================
+const uint16_t pwm_table[PWM_TABLE_SIZE] = { 1250, 1372, 1493, 1612, 1728, 1839, 1944, 2042, 2133, 2216, 2289,
+                                             2352, 2404, 2446, 2475, 2493, 2499, 2493, 2475, 2446, 2404, 2352,
+                                             2289, 2216, 2133, 2042, 1944, 1839, 1728, 1612, 1493, 1372, 1250,
+                                             1127, 1006, 887,  771,  660,  555,  457,  366,  283,  210,  147,
+                                             95,   53,   24,   6,    0,    6,    24,   53,   95,   147,  210,
+                                             283,  366,  457,  555,  660,  771,  887,  1006, 1127 };
+//=============================================================================
+//                  Private Function Definition
+//=============================================================================
+
+//=============================================================================
+//                  Public Function Definition
+//=============================================================================
+void uvw_set_duty(uint16_t base_idx)
+{
+    uint16_t iA = base_idx;
+    uint16_t iB = (base_idx + PWM_TABLE_SIZE / 3) % PWM_TABLE_SIZE;
+    uint16_t iC = (base_idx + 2 * PWM_TABLE_SIZE / 3) % PWM_TABLE_SIZE;
+
+    EPWM->CCR1 = pwm_table[iA];
+    EPWM->CCR2 = pwm_table[iB];
+    EPWM->CCR3 = pwm_table[iC];
+}
+
+int main(void)
+{
+    static uint16_t base_idx = 0;
+    uint32_t timer           = sys_get_tick();
+
+    SYS_Config();
+    uvw_set_duty(base_idx);
+    pwm_enable();
+
+    while (1)
+    {
+#if 0
+        if (sys_get_tick() - timer >= 1)
+        {
+        	GPIO_TogglePin(GPIOA, GPIO_Pin_14);
+            base_idx = (base_idx + 1) % PWM_TABLE_SIZE;
+            uvw_set_duty(base_idx);
+            timer = sys_get_tick();
+        }
+#endif
+
+#if 1
+        if (flag_24Khz_timer)
+        {
+            GPIO_TogglePin(GPIOA, GPIO_Pin_14);
+            base_idx = (base_idx + 1) % PWM_TABLE_SIZE;
+            uvw_set_duty(base_idx);
+            flag_24Khz_timer = false;
+        }
+#endif
+    }
+}