/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*System clock configuration*/
SystemInit();
/* CPIO configuration */
GPIO_Setting();
/* Timer mode configuration for PWM3*/
PrescalerValue = (SystemCoreClock / 1000000) / 10; // Prescale is 2 for 10MHz
TimerModeStructure.PWM_CHn_PR = PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = 80000;
TimerModeStructure.PWM_CHn_LR = 100000; // 80% duty cycle
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(PWM_CH3, &TimerModeStructure);
/* Timer mode configuration for PWM4*/
TimerModeStructure.PWM_CHn_PR = PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = 30000;
TimerModeStructure.PWM_CHn_LR = 100000; // 30% duty cycle
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(PWM_CH4, &TimerModeStructure);
/* Timer mode configuration for PWM5*/
TimerModeStructure.PWM_CHn_PR = PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = 4294900000UL;
TimerModeStructure.PWM_CHn_LR = 4294800000UL;
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_DownCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Oneshot;
PWM_TimerModeInit(PWM_CH5, &TimerModeStructure);
/* PWM output enable */
PWM_CtrlPWMOutputEnable(PWM_CH3);
PWM_CtrlPWMOutputEnable(PWM_CH4);
PWM_CtrlPWMOutputEnable(PWM_CH5);
/* PWM start */
PWM_CHn_Start(PWM_CH3);
PWM_CHn_Start(PWM_CH4);
PWM_CHn_Start(PWM_CH5);
while(1);
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/*System clock configuration*/
SystemInit();
// *(volatile uint32_t *)(0x41001014) = 0x0060100; //clock setting 48MHz
/* CLK OUT Set */
// PAD_AFConfig(PAD_PA,GPIO_Pin_2, PAD_AF2); // PAD Config - CLKOUT used 3nd Function
/* NVIC configuration */
NVIC_Configuration();
/* CPIO configuration */
GPIO_Setting();
/* Timer mode configuration */
PrescalerValue = ((SystemFrequency / 1000000) / 10); // Prescale is 2 for 10MHz
TimerModeStructure.PWM_CHn_PR = PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = 600000;
TimerModeStructure.PWM_CHn_LR = 1200000;
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(PWM_CH0, &TimerModeStructure);
/* PWM interrupt configuration */
PWM_IntConfig(PWM_CH0, ENABLE);
PWM_CHn_IntConfig(PWM_CH0, PWM_CHn_IER_MIE | PWM_CHn_IER_OIE, ENABLE);
/* PWM channel 0 start */
PWM_CHn_Start(PWM_CH0);
while(1);
}
void us_ticker_init(void)
{
if (us_ticker_inited) return;
us_ticker_inited = 1;
SystemCoreClockUpdate();
TimerInitType.PWM_CHn_PR = (GetSystemClock() / 1000000) -1;
TimerInitType.PWM_CHn_LR = 0xFFFFFFFF;
TimerInitType.PWM_CHn_PDMR = 1;
PWM_TimerModeInit(TIMER_1, &TimerInitType);
PWM_CHn_Start(TIMER_1);
}
void pwmout_period_us(pwmout_t* obj, int us)
{
PWM_CHn_Stop(obj->PWM_CHx);
// Update the SystemCoreClock variable
SystemCoreClockUpdate();
obj->period = (us * 2) - 1;
obj->pulse = us / 2;
obj->PrescalerValue = (SystemCoreClock / 1000000) / 2;
TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = obj->pulse;
TimerModeStructure.PWM_CHn_LR = obj->period;
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
PWM_CtrlPWMOutputEnable(obj->PWM_CHx);
}
void pwmout_write(pwmout_t* obj, float value)
{
if (value < (float)0.0) {
value = 0.0;
} else if (value > (float)1.0) {
value = 1.0;
}
obj->pulse = (uint32_t)((float)obj->period * value);
PWM_CHn_Stop(obj->PWM_CHx);
TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
TimerModeStructure.PWM_CHn_MR = obj->pulse;
TimerModeStructure.PWM_CHn_LR = obj->period;
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
PWM_CHn_Start(obj->PWM_CHx);
}
void rtc_init(void) {
PWM_TimerModeInitTypeDef TimerModeStructure;
*(volatile uint32_t *)(0x410010e0) = 0x03;
/* Timer mode configuration */
TimerModeStructure.PWM_CHn_PR = 7;
TimerModeStructure.PWM_CHn_MR = 1;
TimerModeStructure.PWM_CHn_LR = 0xF4240;
TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
PWM_TimerModeInit(PWM_CH3, &TimerModeStructure);
/* PWM interrupt configuration */
PWM_IntConfig(PWM_CH3, ENABLE);
PWM_CHn_IntConfig(PWM_CH3, PWM_CHn_IER_OIE, ENABLE);
/* PWM channel 0 start */
PWM_CHn_Start(PWM_CH3);
NVIC_SetVector(PWM3_IRQn, (uint32_t)PWM3_Handler);
NVIC_EnableIRQ(PWM3_IRQn);
rtc_enabled = 1;
}