本次实验源程序：
////////////////////////////////////////////////////////////////////////////////
/// [url=home.php?mod=space&uid=288409]@file[/url] TIMER_PWM_IT.C
/// [url=home.php?mod=space&uid=187600]@author[/url] D Chen
/// [url=home.php?mod=space&uid=895143]@version[/url] v2.0.0
/// [url=home.php?mod=space&uid=212281]@date[/url] 2019-03-13
/// [url=home.php?mod=space&uid=247401]@brief[/url] THIS FILE PROVIDES ALL THE TIMER_PWM_IT EXAMPLE.
////////////////////////////////////////////////////////////////////////////////
/// @attention
///
/// THE EXISTING FIRMWARE IS ONLY FOR REFERENCE, WHICH IS DESIGNED TO PROVIDE
/// CUSTOMERS WITH CODING INFORMATION ABOUT THEIR PRODUCTS SO THEY CAN SAVE
/// TIME. THEREFORE, MINDMOTION SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT OR
/// CONSEQUENTIAL DAMAGES ABOUT ANY CLAIMS ARISING OUT OF THE CONTENT OF SUCH
/// HARDWARE AND/OR THE USE OF THE CODING INFORMATION CONTAINED HEREIN IN
/// CONNECTION WITH PRODUCTS MADE BY CUSTOMERS.
///
/// <H2><CENTER>© COPYRIGHT 2018-2019 MINDMOTION </CENTER></H2>
////////////////////////////////////////////////////////////////////////////////
// Define to prevent recursive inclusion --------------------------------------
#define _TIMER_C_
// Includes -------------------------------------------------------------------
#include <string.h>
#include "system_mm32.h"
#include "drv.h"
#include "timer.h"
#include "resource.h"
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup MM32_Example_Layer
/// @{
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup EXAMPLE_TIM
/// @{
////////////////////////////////////////////////////////////////////////////////
/// @addtogroup TIM_Exported_Functions
/// @{
////////////////////////////////////////////////////////////////////////////////
// @brief Timer update event callback
// @param TIMHandle: TIM handle.
// [url=home.php?mod=space&uid=536309]@NOTE[/url] This example shows a simple way to use timer update event, and you
// can add your own implementation.
// @retval None.
////////////////////////////////////////////////////////////////////////////////
void UpdateCallback(void* fPtr)
{
if (tickCnt > 0)
tickCnt++;
vdLED = 0x0f;
SysDisplay((u8*)&vdLED);
}
////////////////////////////////////////////////////////////////////////////////
// @brief Timer Compare/Capture event callback
// @param UartHandle: TIM handle
// @note This example shows a simple way to use timer Compare/Capture event,
// and you can add your own implementation.
// @retval None.
////////////////////////////////////////////////////////////////////////////////
void CCCallback(void* fPtr)
{
if (tickCnt > 0)
tickCnt++;
vdLED = 0x00;
SysDisplay((u8*)&vdLED);
}
////////////////////////////////////////////////////////////////////////////////
/// @brief This function handles App SysTick Handler.
/// @param None.
/// @retval None.
////////////////////////////////////////////////////////////////////////////////
void AppTaskTick()
{
if (tickCnt++ >= 50) {
tickCnt = 0;
tickFlag = true;
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief Main function, program entry.
/// @param None.
/// @retval None.
////////////////////////////////////////////////////////////////////////////////
int main(void)
{
// Step 1: Setting System Clock ------------------>>>>>
/* ==== System Clock & SysTick & AppTaskTick Setting ==== */
/* When the parameter is NULL, AppTaskTick function used */
MCUID = SetSystemClock(emSYSTICK_On, (u32*)&AppTaskTick);
/* When the parameter is NULL, AppTaskTick function not be used */
// MCUID = SetSystemClock(emSYSTICK_On, NULL);
// Step 2: Create File Device ---------------------->>>>>
HANDLE hTIM = CreateFile(emIP_TIM);
if (hTIM == NULL) while(1);
// Step 3: Assignment DCB structure --------------->>>>>
tAPP_TIM_DCB dcb = {
// Base parameter
.hSub = emFILE_TIM3, // 1:TIM1 2:TIM2 2:TIM3 ...
.mode = emTIM_PWM, // emPWM, emCapturePulse, emCapturePWM
// Timer base count configure
.cntFreq = 1000000, // unit: 1Hz ==> timer counter clock = 1MHz
.period = 1000, // period = 1 MHz * 1000 = 1KHz
// Timer channel configure
.ch = emTIM_CH3, // select config channel
.pulse = 500, // 500 / 1000 = 50% PWM dutycycle
// Callback function
.cbUp = (u32)&UpdateCallback, //NULL
.cbCc = (u32)&CCCallback, //NULL
// Operation mode
.type = emTYPE_IT, // emTYPE_IT, emTYPE_DMA
.sync = emTYPE_Sync, // emTYPE_Sync, emTYPE_ASync
.remapEn = false, // 0, 1
.remapIdx = 0, // u8 value
};
// Step 3: Open File Device ---------------------->>>>>
if (!OpenFile(hTIM, (void*)&dcb)) while(1);
u16 pwmValue = dcb.pulse; // set 50% PWM dutyCycle
while (1) {
if (SysKeyboard(&vkKey)) {
if (vkKey == VK_K2) {
pwmValue += 10; // Press K3
}
if (vkKey == VK_K3) {
pwmValue -= 10; // Press K4
}
}
// if (pwmValue > dcb.period) pwmValue = 10; // set TIM CCR1 value < TIM ARR value
// if (tickFlag) {
// WriteFile(hTIM, emFILE_TIM3, (u8*)&pwmValue, 1);
// tickFlag = false;
// }
#if defined(__SYS_RESOURCE_POLLING)
if (tickFlag) {
tickFlag = false;
// SysDisplay((u8*)&vdLED);
// if (vdLED == 0) vdLED = 1;
// else vdLED <<= 1;
// if (vdLED >= 0x10) vdLED = 0x0001;
//Ìí¼Ó´úÂ룺
static int8_t dir = 10;
pwmValue += dir;
if (pwmValue > dcb.period - 10) dir = -10;
if (pwmValue < 10) dir = 10;
WriteFile(hTIM, emFILE_TIM3, (u8*)&pwmValue, 1);
}
#endif
}
}
/// @}
/// @}
/// @}
timer_pwm_it.rar
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