Hello Hui Ma,
sorry, I can’t get it working, not even for a single module.
I altered the PWM Example from the SDK slightly. See below, I’ve highlighted my changes.
After calling
PWM1->SM[0].CTRL2 |= PWM_CTRL2_FORCE_MASK;
the Counter are not going to the init Value.
Thanks and best regards
Markus
/*!
* @brief Main function
*/
int main(void)
{
/* Structure of initialize PWM */
pwm_config_t pwmConfig;
static uint16_t delay;
uint32_t pwmVal = 4;
uint16_t i;
/* Board pin, clock, debug console init */
BOARD_ConfigMPU();
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();
CLOCK_SetDiv(kCLOCK_AhbDiv, 0x2); /* Set AHB PODF to 2, divide by 3 */
CLOCK_SetDiv(kCLOCK_IpgDiv, 0x3); /* Set IPG PODF to 3, divede by 4 */
/* Set the PWM Fault inputs to a low value */
XBARA_Init(XBARA1);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputLogicHigh, kXBARA1_OutputFlexpwm1Fault0);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputLogicHigh, kXBARA1_OutputFlexpwm1Fault1);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputLogicHigh, kXBARA1_OutputFlexpwm1234Fault2);
XBARA_SetSignalsConnection(XBARA1, kXBARA1_InputLogicHigh, kXBARA1_OutputFlexpwm1234Fault3);
PRINTF("FlexPWM driver example\n");
/*
* pwmConfig.enableDebugMode = false;
* pwmConfig.enableWait = false;
* pwmConfig.reloadSelect = kPWM_LocalReload;
* pwmConfig.faultFilterCount = 0;
* pwmConfig.faultFilterPeriod = 0;
* pwmConfig.clockSource = kPWM_BusClock;
* pwmConfig.prescale = kPWM_Prescale_Divide_1;
* pwmConfig.initializationControl = kPWM_Initialize_LocalSync;
* pwmConfig.forceTrigger = kPWM_Force_Local;
* pwmConfig.reloadFrequency = kPWM_LoadEveryOportunity;
* pwmConfig.reloadLogic = kPWM_ReloadImmediate;
* pwmConfig.pairOperation = kPWM_Independent;
*/
PWM_GetDefaultConfig(&pwmConfig);
/* Use full cycle reload */
pwmConfig.reloadLogic = kPWM_ReloadPwmFullCycle;
/* PWM A & PWM B form a complementary PWM pair */
pwmConfig.pairOperation = kPWM_ComplementaryPwmA;
pwmConfig.enableDebugMode = false;
/* Initialize submodule 0 */
if (PWM_Init(BOARD_PWM_BASEADDR, kPWM_Module_0, &pwmConfig) == kStatus_Fail)
{
PRINTF("PWM initialization failed\n");
return 1;
}
/* Initialize submodule 1 */
pwmConfig.clockSource = kPWM_Submodule0Clock;
pwmConfig.initializationControl = kPWM_Initialize_MasterSync;
pwmConfig.forceTrigger = kPWM_Force_Master;
if (PWM_Init(BOARD_PWM_BASEADDR, kPWM_Module_1, &pwmConfig) == kStatus_Fail)
{
PRINTF("PWM initialization failed\n");
return 1;
}
BOARD_PWM_BASEADDR->SM[kPWM_Module_1].CTRL2 |= PWM_CTRL2_FRCEN_MASK;
/* Initialize submodule 2 the same way as submodule 1 */
if (PWM_Init(BOARD_PWM_BASEADDR, kPWM_Module_2, &pwmConfig) == kStatus_Fail)
{
PRINTF("PWM initialization failed\n");
return 1;
}
BOARD_PWM_BASEADDR->SM[kPWM_Module_2].CTRL2 |= PWM_CTRL2_FRCEN_MASK;
/* Call the init function with demo configuration */
PWM_DRV_Init3PhPwm();
/* Set the load okay bit for all submodules to load registers from their buffer */
PWM_SetPwmLdok(BOARD_PWM_BASEADDR, kPWM_Control_Module_0 | kPWM_Control_Module_1 | kPWM_Control_Module_2, true);
/* Start the PWM generation from Submodules 0, 1 and 2 */
PWM_StartTimer(BOARD_PWM_BASEADDR, kPWM_Control_Module_0 | kPWM_Control_Module_1 | kPWM_Control_Module_2);
delay = 0x0fffU;
while (1U)
{
for (i = 0U; i < delay; i++)
{
__ASM volatile("nop");
}
pwmVal = pwmVal + 4;
/* Reset the duty cycle percentage */
if (pwmVal > 100)
{
pwmVal = 4;
PWM1->SM[0].CTRL2 |= PWM_CTRL2_FORCE_MASK;
}
/* Update duty cycles for all 3 PWM signals */
PWM_UpdatePwmDutycycle(BOARD_PWM_BASEADDR, kPWM_Module_0, kPWM_PwmA, kPWM_SignedCenterAligned, pwmVal);
PWM_UpdatePwmDutycycle(BOARD_PWM_BASEADDR, kPWM_Module_1, kPWM_PwmA, kPWM_SignedCenterAligned, (pwmVal >> 1));
PWM_UpdatePwmDutycycle(BOARD_PWM_BASEADDR, kPWM_Module_2, kPWM_PwmA, kPWM_SignedCenterAligned, (pwmVal >> 2));
/* Set the load okay bit for all submodules to load registers from their buffer */
PWM_SetPwmLdok(BOARD_PWM_BASEADDR, kPWM_Control_Module_0 | kPWM_Control_Module_1 | kPWM_Control_Module_2, true);
}
}
