S32KのトピックRe: When using the S32K396 eFlexPWM to output complementary PWM, only PWMA has an output.

When using the S32K396 eFlexPWM to output complementary PWM, only PWMA has an output.

qingwang_a — Thu, 22 Aug 2024 10:18:14 GMT

When I use the eFlexPWM submodule 0 of the S32K396 to generate complementary PWM, the PWMA channel has output, but the PWMB channel does not. However, when I use PWMB to output PWM separately, the PWMB channel outputs normally. Below are my configurations and code in the S32DS.

/* Including necessary configuration files. */

#include "Mcal.h"

//#include "Siul2_Dio_Ip.h"

#include "Siul2_Port_Ip.h"

#include "Clock_Ip.h"

#include "FlexPwm_Ip.h"

#define INSTANCE_0 (uint8)0U

#define SubModule_0 (uint8)0U

#define SubModule_1 (uint8)1U

#define SubModule_2 (uint8)2U

/* User includes */

/*!

\brief The main function for the project.

\details The startup initialization sequence is the following:

* - startup asm routine

* - main()

int main(void)

{

/* Write your code here */

Clock_Ip_Init(Clock_Ip_aClockConfig);

Siul2_Port_Ip_Init(NUM_OF_CONFIGURED_PINS_PortContainer_0_BOARD_InitPeripherals, g_pin_mux_InitConfigArr_PortContainer_0_BOARD_InitPeripherals);

FlexPwm_Ip_Init(INSTANCE_0,&FlexPwm_Ip_InstanceCfg_I0);

// FlexPwm_Ip_ClearLoadValue(INSTANCE_0, 1U << SubModule_0);

// FlexPwm_Ip_UpdateDutyCycle(INSTANCE_0, SubModule_0, FLEXPWM_IP_PWMA, 200);

// FlexPwm_Ip_LoadValue(INSTANCE_0, 1U << SubModule_0, TRUE);

// FlexPwm_Ip_ClearLoadValue(INSTANCE_0, 1U << SubModule_1);

// FlexPwm_Ip_UpdateDutyCycle(INSTANCE_0, SubModule_1, FLEXPWM_IP_PWMA, 0x200);

// FlexPwm_Ip_LoadValue(INSTANCE_0, 1U << SubModule_1, TRUE);

// FlexPwm_Ip_ClearLoadValue(INSTANCE_0, 1U << SubModule_2);

// FlexPwm_Ip_UpdateDutyCycle(INSTANCE_0, SubModule_2, FLEXPWM_IP_PWMA, 0x300);

// FlexPwm_Ip_LoadValue(INSTANCE_0, 1U << SubModule_2, TRUE);

while(1)

{

}

Could you please tell me how to configure it so that the complementary channel PWMB outputs normally? Thank you.

Re: When using the S32K396 eFlexPWM to output complementary PWM, only PWMA has an output.

_Leo_ — Wed, 11 Sep 2024 23:12:07 GMT

Hi,

Thank you so much for your interest in our products and for using our community.

You could refer to the attached project created in S32DS-S32PLATFORM v.3.5 and RTD 3.0.0 (for SW detail please refer to Getting Started With S32K396-BGA-DC1 Evaluation Board).

The demo outputs the PWM signals, in complementary mode, in PWM1_A_0 (PTC31) and PWM1_B_0 (PTA6), you will need to use the S32X-MB and connect the scope in P13-1 and P13-5, respectively.

Hope it helps you.

Have a nice day!

Re: When using the S32K396 eFlexPWM to output complementary PWM, only PWMA has an output.

qingwang_a — Thu, 19 Sep 2024 09:01:19 GMT

Thank you, I found the reason. When I enabled the error channels, the complementary channels defaulted to opening all the error channels. Although I was only using error channels 1 and 2, everything worked fine after I individually disabled error channels 3 and 4 of the complementary channels.