[经验]

【M0】 MG32F02A 学习笔记③ 定时器0 1ms延时

2019-11-18 09:50:45

1034 单片机编程 Cortex-M0

上回我们说到了MG32F02A的GPIO的使用来进行点亮LED的实验，这次，我们来为这个点亮LED做一点改进，变成流水灯吧。
以下不使用Wizard的版本，此处要注意一点，我的初始化函数CSC_Init()与系统使用的初始化函数同名，要是用的话可以改名或者直接把mg32x02z_Init目录删除：

#include "MG32x02z_DRV.H"
#include
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
// Delay Period Setting
// Clock Prescaler (1~256) <1-256>
// Main Counter (1~256) <1-256>
//if user wants to delay 1ms and CK_TM00_PR is 12MHz.
//The Total clocks is 12M*1ms = 12000.
//User can set "clock prescaler"=100 and "pulse width"=120 .
#define Simple_Time_Prescaler 100
#define Simple_Time_MainCounter 120
void CSC_Init (void)
{
CSC_PLL_TyprDef CSC_PLL_CFG;
UnProtectModuleReg(MEMprotect); // Setting flash wait state
MEM_SetFlashWaitState(MEM_FWAIT_ONE); // 50MHz> Sysclk >=25MHz
ProtectModuleReg(MEMprotect);
UnProtectModuleReg(CSCprotect);
CSC_CK_APB_Divider_Select(APB_DIV_1); // Modify CK_APB divider APB=CK_MAIN/1
CSC_CK_AHB_Divider_Select(AHB_DIV_1); // Modify CK_AHB divider AHB=APB/1
/* CK_HS selection */
CSC_IHRCO_Select(IHRCO_12MHz); // IHRCO Sel 12MHz
CSC_IHRCO_Cmd(ENABLE);
while(CSC_GetSingleFlagStatus(CSC_IHRCOF) == DRV_Normal);
CSC_ClearFlag(CSC_IHRCOF);
CSC_CK_HS_Select(HS_CK_IHRCO); // CK_HS select IHRCO
/* CK_MAIN */
CSC_CK_MAIN_Select(MAIN_CK_HS);
/* Configure ICKO function */
/* Configure peripheral clock */
CSC_PeriphOnModeClock_Config(CSC_ON_PortE,ENABLE);
CSC_PeriphProcessClockSource_Config(CSC_TM00_CKS, CK_APB);
CSC_PeriphOnModeClock_Config(CSC_ON_TM00, ENABLE); // Enable IIC0 module clock
ProtectModuleReg(CSCprotect);
}
void TM00_Delay_Init(void)
{
TM_TimeBaseInitTypeDef TM_TimeBase_InitStruct;
// make sure :
//===Set CSC init====
//MG32x02z_CSC_Init.h(Configuration Wizard)
//Select CK_HS source = CK_IHRCO
//Select IHRCO = 12M
//Select CK_MAIN Source = CK_HS
//Configure PLL->Select APB Prescaler = CK_MAIN/1
//Configure Peripheral On Mode Clock->TM00 = Enable
// ----------------------------------------------------
// 1.initial TimeBase structure
TM_TimeBaseStruct_Init(&TM_TimeBase_InitStruct);
// modify parameter
TM_TimeBase_InitStruct.TM_Period = Simple_Time_MainCounter - 1;
TM_TimeBase_InitStruct.TM_Prescaler = Simple_Time_Prescaler - 1;
TM_TimeBase_InitStruct.TM_CounterMode = Cascade;
TM_TimeBase_Init(TM00, &TM_TimeBase_InitStruct);
TM_ClearFlag(TM00, TMx_TOF);
// ----------------------------------------------------
// 3.Start TM00
TM_Timer_Cmd(TM00, ENABLE);
// ----------------------------------------------------
// 4.until TOF flag event (polling)
while(TM_GetSingleFlagStatus(TM00, TMx_TOF) == DRV_UnHappened);
TM_ClearFlag(TM00, TMx_TOF); // clear TOF flag
// TM_Timer_Cmd(TM00, DISABLE);
}
void delay_ms(int i)
{
int x=0;
for(x=0;x {
while(TM_GetSingleFlagStatus(TM00, TMx_TOF) == DRV_UnHappened);
TM_ClearFlag(TM00, TMx_TOF); // clear TOF flag
}
}
int main()
{
PIN_InitTypeDef PINX_InitStruct;
CSC_Init();
PINX_InitStruct.PINX_Mode = PINX_Mode_PushPull_O; // Pin select digital input mode
PINX_InitStruct.PINX_PUResistant = PINX_PUResistant_Enable; // Enable pull up resistor
PINX_InitStruct.PINX_Speed = PINX_Speed_Low;
PINX_InitStruct.PINX_OUTDrive = PINX_OUTDrive_Level0; // Pin output driver full strength.
PINX_InitStruct.PINX_FilterDivider = PINX_FilterDivider_Bypass;// Pin input deglitch filter clock divider bypass
PINX_InitStruct.PINX_Inverse = PINX_Inverse_Disable; // Pin input data not inverse
PINX_InitStruct.PINX_Alternate_Function = 0; // Pin AFS = 0
GPIO_PinMode_Config(PINE(15),&PINX_InitStruct); // D6 setup at PE15
TM00_Delay_Init();
while(1)
{
delay_ms(1000);
PE15=~PE15;
}
}