3 phase sinusoidal pulse width modulation (PWM) TIM1

#include "stm32f10x.h"

int i=0;

//sinusoidal data for 256 point 
const u16 PWMdata[256]={
2884,2954,3025,3095,3165,3235,3305,3375,3444,3512, 
3581,3648,3715,3782,3848,3914,3978,4042,4105,4168, 
4229,4290,4349,4408,4466,4522,4578,4633,4686,4738, 
4789,4839,4887,4934,4980,5024,5067,5109,5149,5187, 
5224,5260,5294,5326,5357,5387,5414,5440,5465,5487, 
5508,5528,5545,5561,5575,5588,5598,5607,5614,5614, 
5614,5614,5614,5614,5614,5614,5607,5598,5588,5575, 
5561,5545,5528,5508,5487,5465,5440,5414,5387,5357, 
5326,5294,5260,5224,5187,5149,5109,5067,5024,4980, 
4934,4887,4839,4789,4738,4686,4633,4578,4522,4466, 
4408,4349,4290,4229,4168,4105,4042,3978,3914,3848, 
3782,3715,3648,3581,3512,3444,3375,3305,3235,3165, 
3095,3025,2954,2884,2813,2742,2672,2601,2531,2461, 
2391,2321,2251,2182,2114,2045,1978,1911,1844,1778, 
1712,1648,1584,1521,1458,1397,1336,1277,1218,1160, 
1104,1048,993 ,940 ,888 ,837 ,787 ,739 ,692 ,646 , 
602 ,559 ,517 ,477 ,439 ,402 ,366 ,332 ,300 ,269 , 
239 ,212 ,186 ,161 ,139 ,118 ,98 ,81 ,65 ,51 , 
38 ,28 ,19 ,12 ,10 ,10 ,10 ,10 ,10 ,10 , 
12 ,19 ,28 ,38 ,51 ,65 ,81 ,98 ,118 ,139 , 
161 ,186 ,212 ,239 ,269 ,300 ,332 ,366 ,402 ,439 , 
477 ,517 ,559 ,602 ,646 ,692 ,739 ,787 ,837 ,888 , 
940 ,993 ,1048,1104,1160,1218,1277,1336,1397,1458, 
1521,1584,1648,1712,1778,1844,1911,1978,2045,2114, 
2182,2251,2321,2391,2461,2531,2601,2672,2742,2813, 
2884,2954,3025,3095,3165,3235, 
};
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 
TIM_OCInitTypeDef TIM_OCInitStructure; 
GPIO_InitTypeDef GPIO_InitStructure; 
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

ErrorStatus HSEStartUpStatus;

/* Private function prototypes -----------------------------------------------*/ 
void RCC_Configuration(void); 
void GPIO_Configuration(void); 
void NVIC_Configuration(void);


int main(void) 
{ 
#ifdef DEBUG 
debug(); 
#endif 
/* System Clocks Configuration */ 
RCC_Configuration();

/* NVIC configuration */ 
NVIC_Configuration();

/* GPIO Configuration */ 
GPIO_Configuration();

/* TIM1 Configuration --------------------------------------------------- 
Generates 6 complemantary PWM signals with 4 sinusoidal data duty cycles: 
TIM1CLK = 72 MHz, Prescaler = 0, TIM1 counter clock = 72 MHz 
TIM1 frequency = TIM1CLK/(TIM1_Period + 1) = 
Time Base configuration */

/* TIM1 Peripheral Configuration ----------------------------------------*/ 
/* Time Base configuration */ 
TIM_TimeBaseStructure.TIM_Prescaler = 0; 
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
TIM_TimeBaseStructure.TIM_Period = 5625-1; 
TIM_TimeBaseStructure.TIM_ClockDivision = 0; 
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

/* Channel 3 Configuration in PWM mode */ 
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 
TIM_OCInitStructure.TIM_Pulse = PWMdata[0];//127; 
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; 
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC3Init(TIM1, &TIM_OCInitStructure);

/* Channel 2 Configuration in PWM mode */ 
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 
TIM_OCInitStructure.TIM_Pulse = PWMdata[0];//127; 
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; 
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC2Init(TIM1, &TIM_OCInitStructure);

/* Channel 1 Configuration in PWM mode */ 
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; 
TIM_OCInitStructure.TIM_Pulse = PWMdata[5];//127; 
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; 
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);

/* Automatic Output enable, Break, dead time and lock configuration*/ 
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable; 
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable; 
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1; 
TIM_BDTRInitStructure.TIM_DeadTime = 5; 
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; 
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High; 
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;

TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
/* TIM1 counter enable */
//clear tim1 interrupt flag 
TIM_ClearFlag(TIM1, TIM_FLAG_CC1);
//TIM1 interrupt source
TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
TIM_Cmd(TIM1, ENABLE);

/* Main Output Enable */ 
TIM_CtrlPWMOutputs(TIM1, ENABLE);
while (1) 
{

} 
}

/******************************************************************************* 
* Function Name : RCC_Configuration 
* Description : Configures the different system clocks. 
* Input : None 
* Output : None 
* Return : None 
*******************************************************************************/
void RCC_Configuration(void) 
{ 
/* RCC system reset(for debug purpose) */ 
RCC_DeInit();

/* Enable HSE */ 
RCC_HSEConfig(RCC_HSE_ON);

/* Wait till HSE is ready */ 
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if (HSEStartUpStatus == SUCCESS) 
{ 
/* Enable Prefetch Buffer */ 
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

/* Flash 2 wait state */ 
FLASH_SetLatency(FLASH_Latency_2);

/* HCLK = SYSCLK */ 
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* PCLK2 = HCLK */ 
RCC_PCLK2Config(RCC_HCLK_Div1);

/* PCLK1 = HCLK/2 */ 
RCC_PCLK1Config(RCC_HCLK_Div2);

/* ADCCLK = PCLK2/4 */ 
RCC_ADCCLKConfig(RCC_PCLK2_Div6);

/* PLLCLK = 8MHz * 9 = 72 MHz */ 
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* Enable PLL */ 
RCC_PLLCmd(ENABLE);

/* Wait till PLL is ready */ 
while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) 
{}

/* Select PLL as system clock source */ 
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

/* Wait till PLL is used as system clock source */ 
while (RCC_GetSYSCLKSource() != 0x08) 
{} 
}

/* TIM1, GPIOA and GPIOB clock enable */ 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | 
RCC_APB2Periph_GPIOB| 
RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD, ENABLE);
}
/******************************************************************************* 
* Function Name : GPIO_Configuration 
* Description : Configure the TIM1 Pins. 
* Input : None 
* Output : None 
* Return : None 
*******************************************************************************/ 
void GPIO_Configuration(void) 
{ 
GPIO_InitTypeDef GPIO_InitStructure;

/* GPIOA Configuration: Channel 1, 2, 3 and 4 as alternate function push-pull */ 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */ 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_6 | GPIO_Pin_7; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
GPIO_Init(GPIOC, &GPIO_InitStructure); 
}

/******************************************************************************* 
* Function Name : NVIC_Configuration 
* Description : Configures Vector Table base location. 
* Input : None 
* Output : None 
* Return : None 
*******************************************************************************/ 
void NVIC_Configuration(void) 
{ 
NVIC_InitTypeDef NVIC_InitStructure;

#ifdef VECT_TAB_RAM 
/* Set the Vector Table base location at 0x20000000 */ 
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); 
#else /* VECT_TAB_FLASH */ 
/* Set the Vector Table base location at 0x08000000 */ 
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); 
#endif

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn; 
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; 
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; 
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; 
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
NVIC_Init(&NVIC_InitStructure);
}
#ifdef DEBUG 
/******************************************************************************* 
* Function Name : assert_failed 
* Description : Reports the name of the source file and the source line number 
* where the assert_param error has occurred. 
* Input : - file: pointer to the source file name 
* - line: assert_param error line source number 
* Output : None 
* Return : None 
*******************************************************************************/ 
void assert_failed(u8* file, u32 line) 
{ 
/* User can add his own implementation to report the file name and line number, 
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

while (1) 
{} 
} 
#endif

/******************* *****END OF FILE****/

void TIM1_CC_IRQHandler(void)
{ 
i++;
TIM_OCInitStructure.TIM_Pulse = PWMdata[i];
TIM_OC1Init(TIM1, &TIM_OCInitStructure); 
TIM_OC2Init(TIM1, &TIM_OCInitStructure); 
TIM_OC3Init(TIM1, &TIM_OCInitStructure);

/* check if array's index reaches the max: 255 */
if (i == 255)
{
i = 0;
}
TIM_ClearFlag(TIM1,TIM_FLAG_CC1);
}