MCPWM (not for motor) for 1 mhz

[redowl]

mcpwm to full control a mosfet@1mhz, the bridge used in a power control a transformer 1Mhz (not khz)
the mcpwm not generate frequency to 1mhz
100khz

1mhz
for this usage 5 bit pwm
4 wire

have idea to increrase frequency to 1mhz ?

Code: [Select all] [Expand/Collapse]

1.  
2.  
3. #include <stdio.h>
4. #include <stdlib.h>
5. #include <iomanip>
6. #include <iostream>
7. using namespace std;
8. #include <WString.h>
9. #include <Arduino.h>
10.  
11.  
12.  
13.  
14.  
15.  
16. #include <ArduinoJson.h>
17. #include "driver/uart.h"
18. #include "driver/temp_sensor.h"
19. #include "driver/gpio.h"
20. #include "driver/ledc.h"
21.  
22.  
23.  
24.  
25. #include "esp_attr.h"
26.  
27. #include "driver/mcpwm.h"
28. #include "soc/mcpwm_periph.h"
29.  
30. #include "freertos/FreeRTOS.h"
31. #include "freertos/task.h"
32. #include "esp_system.h"
33. #include "esp_log.h"
34. #include "esp_err.h"
35. #include "SD.h"
36. #include "FS.h"
37. #include "SPI.h"
38.  
39.  
40. /********************************** SD **********************************************************/
41. #define SD_CS                       (GPIO_NUM_41)   // SD_CS     41
42. #define SDMMC_CMD                   (GPIO_NUM_40)   // SD_MOSI   40
43. #define SDMMC_CLK                   (GPIO_NUM_39)   // SD_CLK    39
44. #define SDMMC_D0                    (GPIO_NUM_38)   // SD_MISO   38
45. uint64_t SD_CARD_INFO[5]            = {0,0,0,0,0}; //type and present, size, totalbyte, used, freebyte
46.  
47.  
48.  
49.  
50.  
51.  
52.  
53.  
54.  
55.  
56. /** @brief ESP32 Phae-Shift-PWM Example
57.  *
58.  * Uses the driver for the MCPWM hardware modules on the Espressif ESP32
59.  * or ESP32-S3 SoC for generating a Phase-Shift-PWM waveform between
60.  * two pairs of hardware pins. (Not compatible with ESP32-S2)
61.  *
62.  * Application in power electronics, e.g. Zero-Voltage-Switching (ZVS)
63.  * Full-Bridge-, Dual-Active-Bridge- and LLC converters.
64.  *
65.  * 2021-05-21 Ulrich Lukas
66.  */
67.  
68.  
69.  
70. #define H_BRIDGE_H0                 (GPIO_NUM_20)       // PWM0A
71. #define H_BRIDGE_L0                 (GPIO_NUM_21)       // PWM0B
72. #define H_BRIDGE_D0                 (GPIO_NUM_42)       // disable
73.  
74.  
75. #define H_BRIDGE_H1                 (GPIO_NUM_35)       // PWM1A
76. #define H_BRIDGE_L1                 (GPIO_NUM_36)       // PWM1B
77. #define H_BRIDGE_D1                 (GPIO_NUM_37)       // disable
78.  
79.  
80. #define H_BRIDGE_FREQUENCY          27000 // max frequency is 1e5 i requred 1e6
81. #define H_BRIDGE_PWM_BIT            10 //not used
82. #define H_BRIDGE_PWM_PARTIAL        33
83.  
84.  
85.  
86.  
87.  
88.  
89.  
90.  
91.  
92.  
93. //************************************************************
94. void buck_Enable(){
95.  
96.  
97.  
98.  
99.  
100.  
101.  
102. mcpwm_config_t pwm_config;                                       //Timer configuration structure
103.     pwm_config.frequency = H_BRIDGE_FREQUENCY;    //frequency = 1000Hz
104.     pwm_config.cmpr_a = 0;
105.     pwm_config.cmpr_b = 0;
106.     pwm_config.counter_mode = MCPWM_UP_COUNTER;
107.     pwm_config.duty_mode = MCPWM_DUTY_MODE_0;
108.    
109.  
110.    MCPWM0.clk_cfg.clk_prescale = ( ( ( APB_CLK_FREQ / 1000000 ) * 2 ) - 1 ); //GROUP CLOCK_IN IS 160MHz, my target is 1us x tick
111.  
112.  
113.  
114. MCPWM0.timer[0].timer_cfg0.timer_prescale = 4; //THIS IS NOT WORKING!!!
115. MCPWM0.timer[0].timer_cfg1.timer_mod = 0;
116. MCPWM0.timer[0].timer_cfg0.timer_period = 5;
117.  
118.    // mcpwm_set_frequency(MCPWM_UNIT_0, MCPWM_TIMER_0,H_BRIDGE_FREQUENCY);
119.  
120.    mcpwm_init(MCPWM_UNIT_0, MCPWM_TIMER_0, &pwm_config);         //Timers 0 and 1 initialised with same setup
121.    mcpwm_init(MCPWM_UNIT_0, MCPWM_TIMER_1, &pwm_config);
122.  
123.    mcpwm_init(MCPWM_UNIT_1, MCPWM_TIMER_0, &pwm_config);         //Timers 0 and 1 initialised with same setup
124.    mcpwm_init(MCPWM_UNIT_1, MCPWM_TIMER_1, &pwm_config);
125.  
126.  
127.    mcpwm_deadtime_enable(MCPWM_UNIT_0,MCPWM_TIMER_0,MCPWM_ACTIVE_HIGH_COMPLIMENT_MODE,0,0); //Timer 0 deadtime setup
128.    mcpwm_deadtime_enable(MCPWM_UNIT_0,MCPWM_TIMER_1,MCPWM_ACTIVE_HIGH_COMPLIMENT_MODE,0,0); //Timer 1 deadtime setup
129.  
130.    mcpwm_deadtime_enable(MCPWM_UNIT_1,MCPWM_TIMER_0,MCPWM_ACTIVE_HIGH_COMPLIMENT_MODE,0,0); //Timer 0 deadtime setup
131.    mcpwm_deadtime_enable(MCPWM_UNIT_1,MCPWM_TIMER_1,MCPWM_ACTIVE_HIGH_COMPLIMENT_MODE,0,0); //Timer 1 deadtime setup
132.    
133.  
134.   //Star using the PWM Duty values such that both driver inputs are set LOW i.e both Half bridge transistos are off
135.   mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_0,MCPWM_GEN_A,0);      //set to 0%
136.   mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_1,MCPWM_GEN_A,100);    //start up set to 100% PWM
137.  
138.   mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_0,MCPWM_GEN_A,0);      //set to 0%
139.   mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_1,MCPWM_GEN_A,100);    //start up set to 100% PWM
140.  
141.  
142.  
143.  
144. //Sync all timers. Generate a sync output of timer0 by invoking mcpwm_set_timer_sync_output()
145. //and selecting desired event to generate sync output from:-
146.    mcpwm_set_timer_sync_output(MCPWM_UNIT_0, MCPWM_TIMER_0,MCPWM_SWSYNC_SOURCE_TEZ);   //'MCPWM_SWSYNC_SOURCE_TEZ' = the sync signal is generated when Timer0 counts to zero
147.    
148. //Sync all timers
149.    mcpwm_sync_enable(MCPWM_UNIT_0, MCPWM_TIMER_0,MCPWM_SELECT_TIMER0_SYNC, 0);   // sync source is from TIMER_0
150.    mcpwm_sync_enable(MCPWM_UNIT_0, MCPWM_TIMER_1,MCPWM_SELECT_TIMER0_SYNC, 0);    //creates 2nd phase on Pin13, a full cycle is 1000
151.   // mcpwm_sync_enable(MCPWM_UNIT_1, MCPWM_TIMER_0,MCPWM_SELECT_TIMER0_SYNC, 500);    //creates 3rd phase on Pin14,    
152.   // mcpwm_sync_enable(MCPWM_UNIT_1, MCPWM_TIMER_1,MCPWM_SELECT_TIMER0_SYNC, 500);    //creates 3rd phase on Pin14,    
153.    
154.    mcpwm_set_timer_sync_output(MCPWM_UNIT_1, MCPWM_TIMER_0,MCPWM_SWSYNC_SOURCE_TEZ);
155.    mcpwm_sync_enable(MCPWM_UNIT_1, MCPWM_TIMER_0,MCPWM_SELECT_TIMER0_SYNC, 0);
156.    mcpwm_sync_enable(MCPWM_UNIT_1, MCPWM_TIMER_1,MCPWM_SELECT_TIMER0_SYNC, 0);      
157.  
158.    mcpwm_gpio_init(MCPWM_UNIT_0, MCPWM0A, H_BRIDGE_H0);   // PWM generation commences following init commands
159.    mcpwm_gpio_init(MCPWM_UNIT_0, MCPWM1B, H_BRIDGE_L0);
160.  
161.    mcpwm_gpio_init(MCPWM_UNIT_1, MCPWM0A, H_BRIDGE_H1);   // PWM generation commences following init commands
162.    mcpwm_gpio_init(MCPWM_UNIT_1, MCPWM1B, H_BRIDGE_L1);
163.  
164. /*
165.   mcpwm_stop(MCPWM_UNIT_0, MCPWM_TIMER_0);   //Saw comments that stop-start is recommended but doesnt seem to be needed??
166.   // vTaskDelay(pdMS_TO_TICKS(10));
167.   mcpwm_start(MCPWM_UNIT_0, MCPWM_TIMER_0);  //give a clean cycle start to PWM generator, no part duty waveforms
168.  
169.   mcpwm_stop(MCPWM_UNIT_0, MCPWM_TIMER_1);  
170.   // vTaskDelay(pdMS_TO_TICKS(10));
171.   mcpwm_start(MCPWM_UNIT_0, MCPWM_TIMER_1);  
172.  */
173.  
174.  // digitalWrite(GPIO_TOGGLE_OUT, HIGH);     //Toggle a pin..for scope diagnostic purposes
175.  
176.  }
177.  
178. //****************************************************************
179. void Set_PWM(float duty){
180.     if(duty>4){      
181.         mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_0,MCPWM_GEN_A,duty);
182.         mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_1,MCPWM_GEN_A,duty);
183.  
184.         mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_0,MCPWM_GEN_A,duty);
185.         mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_1,MCPWM_GEN_A,duty);
186.     }
187.     else{   //Disable the driver inputs by setting both inputs LOW
188.       mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_0,MCPWM_GEN_A,0);   //0%PWM = A LOW
189.       mcpwm_set_duty(MCPWM_UNIT_0,MCPWM_TIMER_1,MCPWM_GEN_A,100); //100% PWM, B compliment = LOW
190.  
191.       mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_0,MCPWM_GEN_A,0);   //0%PWM = A LOW
192.       mcpwm_set_duty(MCPWM_UNIT_1,MCPWM_TIMER_1,MCPWM_GEN_A,100); //100% PWM, B compliment = LOW
193.     }
194. }
195. //*****************************************************************
196.  
197. void setup() {
198.   pinMode(H_BRIDGE_D1, OUTPUT);    // sets the digital pin 13 as output
199.   digitalWrite(H_BRIDGE_D1, HIGH); // sets the status monitor pin low
200.   pinMode(H_BRIDGE_D0, OUTPUT);    // sets the digital pin 13 as output
201.   digitalWrite(H_BRIDGE_D0, HIGH); // sets the status monitor pin low
202.  
203.  
204.   buck_Enable();
205.   Set_PWM(H_BRIDGE_PWM_PARTIAL);
206.   delay(500);
207.   digitalWrite(H_BRIDGE_D0,LOW); // sets the status monitor pin low  
208.   digitalWrite(H_BRIDGE_D1,LOW); // sets the status monitor pin low  
209.  
210.  
211.  
212. }
213.  
214. //**********************************************************************
215. void loop(){
216.  
217.  
218.  
219. }

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[redowl]

generate 1hz

Code: [Select all] [Expand/Collapse]

1.  
2.  
3. #define H_BRIDGE_FREQUENCY          1
4. #define H_BRIDGE_PWM_PARTIAL        50
5. #define NW_RESOLUTION 1e3         // porto la risoluzione dei bit da 1e3 a (1hz)

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generate 1Mhz

Code: [Select all] [Expand/Collapse]

1.  
2. #define H_BRIDGE_FREQUENCY          1e6
3. #define H_BRIDGE_PWM_PARTIAL        50
4. #define NW_RESOLUTION 1e8         // porto la risoluzione dei bit da 1e8 a (1Mhz)

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Code: [Select all] [Expand/Collapse]

1. void buck_Enable(){
2.  
3. //configures two MCPWM Operators to create complimentary PWM signals with a set dead time on rising edges...
4.  
5. mcpwm_timer_set_resolution(MCPWM_UNIT_0, MCPWM_TIMER_0, NW_RESOLUTION);
6. mcpwm_timer_set_resolution(MCPWM_UNIT_1, MCPWM_TIMER_1, NW_RESOLUTION);  //Found necessary to apply this to all timers
7. mcpwm_group_set_resolution(MCPWM_UNIT_0, NW_RESOLUTION);
8. mcpwm_group_set_resolution(MCPWM_UNIT_1, NW_RESOLUTION);
9.  
10. .....

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