feat: Synchronize ADC trigger with EPWM period via LPTIM0

pec930_sdk-v1.0.1/Examples/template/LLC_48V/inc/main.h

@@ -53,12 +53,12 @@ extern "C"
 //  武士 12V 變壓器 + 47nF 諧振頻率 ~ 75KHZ
 //  實測值 106uH + 47nF = 73KHZ --> PERIOD = 820 ~ 830
 //  高正 40uH + 68nF ~ 95KHZ
-#define LLC_PERIOD_SS     400                // 600 = 100khz (EPWM initial use)
+#define LLC_PERIOD_SS     300                // 300 = 200khz (EPWM initial use)
 #define DEAD_TIME         500                // ns
 #define DEAD_TIME_VALUE   (DEAD_TIME * 0.06) // double
 // LLC free run, 改控 vbus_set
-#define LLC_PERIOD_MIN    400 // MIN, 400 = 150KHZ (>760不會振)
-#define LLC_PERIOD_MAX    820 // MAX, 800 = 75KHZ // 可調範圍太大會共振
+#define LLC_PERIOD_MIN    300 // MIN, 300 = 200KHZ (>760不會振)
+#define LLC_PERIOD_MAX    600 // MAX, 600 = 100KHZ // 可調範圍太大會共振
 #define LLC_COMP_GAIN_BIT 10  // 要慢才不會振
 #define LLC_COMP_MAX      ((LLC_PERIOD_MAX - LLC_PERIOD_MIN) << LLC_COMP_GAIN_BIT)
 // LLC Soft Start 掃頻 2倍 ~ 1倍 = 150KHZ ~ 73KHZ
@@ -66,7 +66,7 @@ extern "C"
 #define LLC_SS_MAX        (LLC_PERIOD_MAX << 2)     // 精度不夠，放大 4 倍, 3280
 #define LLC_SS_COUNT      (LLC_SS_MAX - LLC_SS_MIN) // 3280 - 1600 = 1680 * 10us = 16.8ms
 // TIM0 參數 = ADC 取樣頻率
-#define TIM0_PERIOD       600 // 60M / 600 = 100KHZ
+#define TIM0_PERIOD       LLC_PERIOD_SS
 // IAC 參數
 #define I_COMP_MAX        16000 // = V_COMP_MAX * 1.414
 #define I_INT_GAIN_BIT    2
@@ -124,7 +124,7 @@ extern "C"
   void pfc_set_duty(uint16_t val);
   void pfc_pwm_enable();
   void pfc_pwm_disable();
-  void A_Pata_Reset();
+  void A_Para_Reset(void);
   void Vol_Loop_LLC(void);
   void Cur_Loop_PFC(void);
 

pec930_sdk-v1.0.1/Examples/template/LLC_48V/src/init.c

@@ -16,12 +16,15 @@
 void gpio_init(void)
 {
   GPIO_InitTypeDef gpio_init = { 0 };
-
-  // PA12, PWOK
-  gpio_init.GPIO_Pin = GPIO_Pin_12;
+  gpio_init.GPIO_Pin = GPIO_Pin_12;  // PA12, PWOK
+  gpio_init.GPIO_Pin |= GPIO_Pin_06; // PA6, test pin
+  gpio_init.GPIO_Pin |= GPIO_Pin_07; // PA7, test pin
   gpio_init.GPIO_Mode = GPIO_Mode_OUT;
   gpio_init.GPIO_PuPd = GPIO_PuPd_NOPULL;
   GPIO_Init(GPIOA, &gpio_init);
+
+  GPIO_WriteBit(GPIOA, GPIO_Pin_06, GPIO_PIN_LOW);
+  GPIO_WriteBit(GPIOA, GPIO_Pin_07, GPIO_PIN_LOW);
 }
 //===================================================================================
 void adc_init(void)
@@ -44,7 +47,7 @@ void adc_init(void)
   adc_init.DataAlign = ADC_DataAlign_Right;
   adc_init.Mode = ADC_Mode_Scan; // Scan mode
   ADC_Init(ADC0, &adc_init);
-  ADC_ExtTrigConfig(ADC0, ADC_ExtTrigSource_EPWM_CH1R, ADC_ExtTrigMode_Enable);
+  ADC_ExtTrigConfig(ADC0, ADC_ExtTrigSource_TIM0, ADC_ExtTrigMode_Enable);
 
   // ADC interrupt config
   sys_irq_attr_t irq_attr = {
@@ -79,7 +82,6 @@ void llc_pwm_init(void)
   };
   TIM_DeInit(EPWM);
   TIM_TimeBaseInit(EPWM, &tim_init);
-
   TIM_ARRPreloadConfig(EPWM, ENABLE);
 
   // pwm
@@ -90,10 +92,10 @@ void llc_pwm_init(void)
     .TIM_OCIdleState = TIM_OCIdleState_Reset,
     .TIM_OutputNState = TIM_OutputNState_Disable,
     .TIM_OCNPolarity = TIM_OCPolarity_High,
-    .TIM_Pulse = 1,
+    .TIM_Pulse = LLC_PERIOD_SS >> 1,
   };
   TIM_OC1Init(EPWM, &pwm_init);
-  TIM_OC2Init(EPWM, &pwm_init);
+  TIM_OC1PreloadConfig(EPWM, ENABLE); // Output Compare 1 preload enable
 
   { /* Automatic Output enable, Break, dead time and lock configuration */
     TIM_BDTRInitTypeDef bdtr_init = { 0 };
@@ -101,10 +103,6 @@ void llc_pwm_init(void)
     bdtr_init.TIM_DeadTime = DEAD_TIME_VALUE;
     TIM_BDTRConfig(EPWM, &bdtr_init);
   }
-
-  TIM_Cmd(EPWM, ENABLE);
-  TIM_CtrlPWMOutputs(EPWM, ENABLE);
-  EPWM->CCMR1_OUTPUT_b.OC1PE = 1; // Output Compare 1 preload enable
 }
 //===================================================================================
 void tim0_init(void)
@@ -116,8 +114,6 @@ void tim0_init(void)
     .LPTIM_MatchValue = TIM0_PERIOD,
   };
   LPTIM_Init(TIM0, &tim0_init);
-
-  LPTIM_Enable(TIM0);
 }
 //===================================================================================
 void sysclk_init(void)
@@ -140,5 +136,14 @@ void SYS_Config(void)
 
   llc_pwm_init();
 
+  tim0_init();
+
+  // EPWM enable
+  TIM_Cmd(EPWM, ENABLE);            // enable EPWM
+  TIM_CtrlPWMOutputs(EPWM, ENABLE); // enable PWM OUT
+
+  // TIM0 enable
+  LPTIM_Enable(TIM0);
+
   uart_init();
 }

pec930_sdk-v1.0.1/Examples/template/LLC_48V/src/main.c

@@ -119,7 +119,7 @@ uint16_t capture_packet_gap_ms = 1000;
 //=============================================================================
 //                  Private Function Definition
 //=============================================================================
-void A_Para_Reset()
+void A_Para_Reset(void)
 {
   digital_vcomp = (LLC_PERIOD_MAX - LLC_PERIOD_MIN) << LLC_COMP_GAIN_BIT;
   // vbus_set = (VBUS_SET * 4096 / VBUS_2ADC / 3.3);
@@ -131,13 +131,12 @@ void A_Para_Reset()
   iac_comp_2 = 0;
 
   // set default value
-  TIM2->ARR = PFC_PERIOD;
-  TIM2->CCR1 = PFC_DUTY_MIN; // min for ss
-  TIM2->EGR |= 0x01;
   EPWM->ARR = LLC_PERIOD_SS;
-  EPWM->CCR1 = (LLC_PERIOD_SS >> 1);
+  EPWM->CCR1 = LLC_PERIOD_SS >> 1;
   EPWM->EGR |= 0x01;
-  llc_period_ss = 0;
+  llc_period_ss = LLC_SS_MIN;
+
+  TIM0->MR0 = LLC_PERIOD_SS;
 
   pfc_running = 0;
   llc_running = 0;
@@ -201,6 +200,7 @@ void llc_set_period(uint16_t val)
 {
   if (val > LLC_PERIOD_MAX) val = LLC_PERIOD_MAX; // 可以小，不能過大
   EPWM->ARR = val;
+  TIM0->MR0 = val;
   EPWM->CCR1 = val >> 1;
 }
 //===================================================================================
@@ -502,6 +502,7 @@ void Vol_Loop_LLC(void) // 測試可工作
 //=================================================================================
 __INTERRUPT void isr_adc_handle(void)
 {
+  GPIO_TogglePin(GPIOA, GPIO_Pin_06); // debug
   SAVE_IRQ_CSR_CONTEXT();
   ADC_ClearITFlag(ADC0);
 
@@ -598,6 +599,7 @@ int main(void)
 
   // system initial configuration
   SYS_Config();
+  A_Para_Reset();
   sys_delay(10); // delay 10ms
 
   // read plot param from flash
@@ -616,6 +618,7 @@ int main(void)
   cloop_p->a2 = 3737;
 
   cur_loop_fun_en = 1; // 開啟電流環，專測電流環
+
   while (1)
   {
     uart_rx_task();