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#include "stm32f7xx.h"
#include "stm32746g_discovery.h"
static void SystemClock_Config(void);
static void CPU_CACHE_Enable(void);
static void LED_SETUP(void);
static GPIO_InitTypeDef GPIO_InitStruct;
static void TIMER_SETUP(void);
static void TIMER_SETUP1(void);
void TIM3_IRQHandler(void);
TIM_HandleTypeDef TimHandle;
void TIM2_IRQHandler(void);
TIM_HandleTypeDef TimHandle2;
int main(void)
{
SystemClock_Config();
CPU_CACHE_Enable();
HAL_Init();
LED_SETUP();
TIMER_SETUP();
TIMER_SETUP1();
for(;;)
{
}
}
static void TIMER_SETUP(void)
{
HAL_RCC_GetHCLKFreq();
/* Compute the prescaler value to have TIMx counter clock equal to 10000 Hz */
uint32_t uwPrescalerValue = (uint32_t)((SystemCoreClock / 2) / 10000) - 1;
TimHandle.Instance = TIM3;
TimHandle.Init.Period = 10000 - 1;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
__HAL_RCC_TIM3_CLK_ENABLE();
HAL_NVIC_SetPriority(TIM3_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(TIM3_IRQn);
HAL_TIM_Base_Init(&TimHandle);
HAL_TIM_Base_Start_IT(&TimHandle);
}
static void TIMER_SETUP1(void)
{
HAL_RCC_GetHCLKFreq();
/* Compute the prescaler value to have TIMx counter clock equal to 10000 Hz */
uint32_t uwPrescalerValue = (uint32_t)((SystemCoreClock / 2) / 10000) - 1;
TimHandle2.Instance = TIM2;
TimHandle2.Init.Period = 1000 - 1;
TimHandle2.Init.Prescaler = uwPrescalerValue;
TimHandle2.Init.ClockDivision = 0;
TimHandle2.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle2.Init.RepetitionCounter = 0;
__HAL_RCC_TIM2_CLK_ENABLE();
HAL_NVIC_SetPriority(TIM2_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(TIM2_IRQn);
HAL_TIM_Base_Init(&TimHandle2);
HAL_TIM_Base_Start_IT(&TimHandle2);
}
void TIM2_IRQHandler(void)
{
HAL_TIM_IRQHandler(&TimHandle2);
}
void TIM3_IRQHandler(void)
{
HAL_TIM_IRQHandler(&TimHandle);
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
if (htim->Instance==TIM2)
{
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_6);
}
if (htim ->Instance==TIM3)
{
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_7);
}
}
static void LED_SETUP(void)
{
__HAL_RCC_GPIOC_CLK_ENABLE();
//First Enable the GPIO Port I Clock
//GREEN LED PORT I PIN 1
GPIO_InitStruct.Pin = GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_6;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 216000000
* HCLK(Hz) = 216000000
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSE Frequency(Hz) = 25000000
* PLL_M = 25
* PLL_N = 432
* PLL_P = 2
* PLL_Q = 9
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 7
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 25;
RCC_OscInitStruct.PLL.PLLN = 432;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 9;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7);
}
/**
* @brief CPU L1-Cache enable.
* @param None
* @retval None
*/
static void CPU_CACHE_Enable(void)
{
/* Enable I-Cache */
SCB_EnableICache();
/* Enable D-Cache */
SCB_EnableDCache();
}
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Last edited on
Quit using this site as a code dump.
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