【M0】 MG32F02A 学习笔记⑫ 看门狗 IWDT

ti

   上回我们说到了MG32F02A的ADC的使用。
   这次来说说看门狗吧，看门狗的使用还是比较简单的，但是我目前没有发现能够定时看门狗多久复位的功能，只能让他自由计数复位，不知道要怎么实现自定时复位，像stm和ti家的倒是可以。
   代码实现比较简单，代码放在楼下。
   这句IWDT_RefreshCounter();就是我们俗称的喂狗，不停的喂狗CPU就不会复位了。    另外在IWDT初始化的地方我注释掉了/*=== 3. Configure RST module ===*/ 那段代码，如果不注释掉，看门狗复位时系统也不会复位。

#include "MG32x02z_DRV.H"
#include "MG32x02z_ADC_DRV.h"
#include
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
#define URTX URT0
void SysTick_Handler(void)
{
IncTick();
}
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
/* PLL */
/**********************************************************/
CSC_PLL_CFG.InputDivider=PLLI_DIV_2; // 12M/2=6M
CSC_PLL_CFG.Multiplication=PLLIx16; // 6M*16=96M
CSC_PLL_CFG.OutputDivider=PLLO_DIV_2; // PLLO=96M/2=48M
CSC_PLL_Config(&CSC_PLL_CFG);
CSC_PLL_Cmd(ENABLE);
while(CSC_GetSingleFlagStatus(CSC_PLLF) == DRV_Normal);
CSC_ClearFlag(CSC_PLLF);
/**********************************************************/
/* CK_MAIN */
CSC_CK_MAIN_Select(MAIN_CK_HS);
/* Configure ICKO function */
/* Configure peripheral clock */
CSC_PeriphProcessClockSource_Config(CSC_UART0_CKS, CK_APB);
CSC_PeriphOnModeClock_Config(CSC_ON_UART0,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_IWDT,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_PortB,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_PortE,ENABLE);
ProtectModuleReg(CSCprotect);
}
void Sample_URT0_Init(void)
{
URT_BRG_TypeDef URT_BRG;
URT_Data_TypeDef DataDef;
PIN_InitTypeDef PINX_InitStruct;
//==Set CSC init
//MG32x02z_CSC_Init.h(Configuration Wizard)
//Select CK_HS source = CK_IHRCO
//Select IHRCO = 11.0592M
//Select CK_MAIN Source = CK_HS
//Configure PLL->Select APB Prescaler = CK_MAIN/1
//Configure Peripheral On Mode Clock->Port B/URT0 = Enable
//Configure Peripheral On Mode Clock->URT0->Select URT0_PR Source = CK_APB(11.0592)
//==Set GPIO init
//MG32x02z_GPIO_Init.h(Configuration Wizard)->Use GPIOB->Pin8/9
//GPIO port initial is 0xFFFF
//Pin8 mode is PPO/Pin9 mode is ODO
//Pin8/9 pull-up resister Enable
//Pin8/9 function URT0_TX/RX
PINX_InitStruct.PINX_Mode = PINX_Mode_PushPull_O; // Pin select Push Pull 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 = 3; // Pin AFS = URT0_TX
GPIO_PinMode_Config(PINB(8),&PINX_InitStruct); // TXD at PB8
PINX_InitStruct.PINX_Mode = PINX_Mode_OpenDrain_O; // Pin select Open Drain mode
PINX_InitStruct.PINX_Alternate_Function = 3; // Pin AFS = URT0_RX
GPIO_PinMode_Config(PINB(9),&PINX_InitStruct); // RXD at PB9
//=====Set Clock=====//
//---Set BaudRate---//
URT_BRG.URT_InteranlClockSource = URT_BDClock_PROC;
URT_BRG.URT_BaudRateMode = URT_BDMode_Separated;
URT_BRG.URT_PrescalerCounterReload = 0; //Set PSR
URT_BRG.URT_BaudRateCounterReload = 3; //Set RLR
URT_BaudRateGenerator_Config(URTX, &URT_BRG); //BR115200 = f(CK_URTx)/(PSR+1)/(RLR+1)/(OS_NUM+1)
URT_BaudRateGenerator_Cmd(URTX, ENABLE); //Enable BaudRateGenerator
//---TX/RX Clock---//
URT_TXClockSource_Select(URTX, URT_TXClock_Internal); //URT_TX use BaudRateGenerator
URT_RXClockSource_Select(URTX, URT_RXClock_Internal); //URT_RX use BaudRateGenerator
URT_TXOverSamplingSampleNumber_Select(URTX, 25); //Set TX OS_NUM
URT_RXOverSamplingSampleNumber_Select(URTX, 25); //Set RX OS_NUM
URT_RXOverSamplingMode_Select(URTX, URT_RXSMP_3TIME);
URT_TX_Cmd(URTX, ENABLE); //Enable TX
URT_RX_Cmd(URTX, ENABLE); //Enable RX
//=====Set Mode=====//
//---Set Data character config---//
DataDef.URT_TX_DataLength = URT_DataLength_8;
DataDef.URT_RX_DataLength = URT_DataLength_8;
DataDef.URT_TX_DataOrder = URT_DataTyped_LSB;
DataDef.URT_RX_DataOrder = URT_DataTyped_LSB;
DataDef.URT_TX_Parity = URT_Parity_No;
DataDef.URT_RX_Parity = URT_Parity_No;
DataDef.URT_TX_StopBits = URT_StopBits_1_0;
DataDef.URT_RX_StopBits = URT_StopBits_1_0;
DataDef.URT_RX_DataInverse = DISABLE;
DataDef.URT_RX_DataInverse = DISABLE;
URT_DataCharacter_Config(URTX, &DataDef);
//---Set Mode Select---//
URT_Mode_Select(URTX, URT_URT_mode);
//---Set DataLine Select---//
URT_DataLine_Select(URTX, URT_DataLine_2);
//=====Set Error Control=====//
// to do...
//=====Set Bus Status Detect Control=====//
// to do...
//=====Set Data Control=====//
URT_RXShadowBufferThreshold_Select(URTX, URT_RXTH_1BYTE);
URT_IdlehandleMode_Select(URTX, URT_IDLEMode_No);
URT_TXGaudTime_Select(URTX, 0);
//=====Enable URT Interrupt=====//
URT_IT_Cmd(URTX, URT_IT_RX, ENABLE);
URT_ITEA_Cmd(URTX, ENABLE);
NVIC_EnableIRQ(URT0_IRQn);
//=====Enable URT=====//
URT_Cmd(URTX, ENABLE);
//==See MG32x02z_URT0_IRQ.c when interrupt in
}
int fputc(int ch,FILE *f)
{
URT_SetTXData(URTX,1,ch);
while(URT_GetITSingleFlagStatus(URTX,URT_IT_TC)==DRV_UnHappened);
URT_ClearITFlag(URTX,URT_IT_TC);
return ch;
}
void UartSendByte(int ch)
{
URT_SetTXData(URTX,1,ch);
while(URT_GetITSingleFlagStatus(URTX,URT_IT_TC)==DRV_UnHappened);
URT_ClearITFlag(URTX,URT_IT_TC);
}
void IWDT_Init (void)
{
//===Set CSC init====
//MG32x02z_CSC_Init.h(Configuration Wizard)
//Select CK_HS source = CK_IHRCO
//Select IHRCO = 12Mz
//Select CK_MAIN Source = CK_HS
//Configure PLL->Select APB Prescaler = CK_MAIN/1
//Configure Peripheral On Mode Clock->IWDT = Enable
//===Set RST init====
//MG32x02z_RST_Init.h(Configuration Wizard)
//Select Cold/WARM Reset Source ->IWDT = Enable //If you don't want a reset then disable it
// /*=== 1. Enable CSC to IWDT clock ===*/
// UnProtectModuleReg(CSCprotect); // Unprotect CSC module
// CSC_PeriphOnModeClock_Config(CSC_ON_IWDT, ENABLE); // Enable IWDT module clock
// ProtectModuleReg(CSCprotect); // protect CSC module
/*=== 2. Configure IWDT clock ===*/
UnProtectModuleReg(IWDTprotect); // Unprotect IWDT module
IWDT_Divider_Select(IWDT_DIV_256); // DIV output = CK_IWDT /256
/*=== 3. Configure RST module ===*/ //if you don't want to reset when timeout
// UnProtectModuleReg(RSTprotect);
RST_WRstSource_Config(RST_IWDT_WE, DISABLE);
// ProtectModuleReg(RSTprotect);
/*=== 3. Enable IWDT module ===*/
IWDT_Cmd(ENABLE); // Enable IWDT module
ProtectModuleReg(IWDTprotect); // Protect IWDT module
/*=== 4. Check flag action ===*/
while(IWDT_GetSingleFlagStatus(IWDT_EW1F) == DRV_UnHappened); // Wait IWDT early wakeup-1 happened
IWDT_ClearFlag(IWDT_EW1F); // Clear EW1F flag
while(IWDT_GetSingleFlagStatus(IWDT_EW0F) == DRV_UnHappened); // Wait IWDT early wakeup-0 happened
IWDT_ClearFlag(IWDT_EW0F); // Clear EW0F flag
IWDT_RefreshCounter(); // Clear IWDT timer
}
int main()
{
int i;
u16 x;
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
Sample_URT0_Init();
printf("hellon");
InitTick(12000000,0);
NVIC_EnableIRQ(SYS_IRQn);
IWDT_Init();
while(1)
{
Delay(10);
PE15=~PE15;
x=IWDT_GetCounter();
printf("%dn",x);
// if(x==0)
// IWDT_RefreshCounter(); // Clear IWDT timer when count to zero to prevent system reset
}
}

搜索历史

【M0】 MG32F02A 学习笔记⑫ 看门狗 IWDT

相关推荐

精选推荐

最新话题

热门话题

创建小组步骤

站长推荐 /5