【M0】 MG32F02A 学习笔记⑪ ADC转换

ti

上回我们说到了MG32F02A的中断。
这次讲讲ADC怎么用吧。另外，这次ADC我不建议使用DMA，因为这一版的M0的ADC是12位ADC，而DAT寄存器是32位，而且剩余的位并不是空白的，而是还塞了一些flag等信息在DAT寄存器里面。。所以就算你DMA把ADC抓出来，也会导致把不要的数据一起抓出来，最后你还是得自己去操作选择你的数据，所以DMA在这儿意义不大，不过据说这个问题到了下一版M0会修正，至于是啥时候，我就不知道了。
   代码放在楼下。
   烧进程序之后你看会发现，程序根本跑不动，这是为什么呢？你看数据手册：

   板子上的VREF+引脚也是需要供电，而此处的供电会影响ADC转换式，此处的IVREF就是你接的供电，此处我接的是5V，因此公式我带入的是5。

   OK，这样你的ADC就能使用啦。

#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 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_ADC0_CKS, CK_APB);
CSC_PeriphProcessClockSource_Config(CSC_UART0_CKS, CK_APB);
CSC_PeriphOnModeClock_Config(CSC_ON_ADC0,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_UART0,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_PortA,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 ADC_Init(void)
{
ADC_InitTypeDef ADC_Base;
// 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->ADC = Enable
//Configure Peripheral On Mode Clock->Port A = Enable
//==Set GPIO init
//MG32x02z_GPIO_Init.h(Configuration Wizard)->Use GPIOA->Pin4
//GPIO port initial is 0xFFFF
//Pin4 mode is AIO
//Pin4 function GPA4
ADC_DeInit(ADC0);
// ------------------------------------------------------------------------
// 1.Config ADC base parameter
ADC_BaseStructure_Init(&ADC_Base);
// modify parameter
ADC_Base.ADCMainClockSelect = ADC_CKADC;
ADC_Base.ADC_IntCK_Div = ADC_IntDIV16; // for internal clock divider
// ADC data alignment mode (Right or Left)
ADC_Base.ADC_DataAlign = ADC_RightJustified;
// ADC conversion resolution 8, 10 or 12 bit
ADC_Base.ADC_ResolutionSel = ADC_12BitData;
// ADC overwritten data or keep data
ADC_Base.ADC_DataOverrunEvent = ADC_DataOverWritten;
ADC_Base_Init(ADC0, &ADC_Base);
// ------------------------------------------------------------------------
// 2.Enable ADC
ADC_Cmd(ADC0, ENABLE);
// ------------------------------------------------------------------------
// 3.Config ADC Mode
ADC_ConversionMode_Select(ADC0, ADCMode); // one-shot
ADC_PGA_Cmd(ADC0, DISABLE); // Disable PGA
ADC_SingleDifferentMode_Select(ADC0, ADC_SingleMode); // Single Mode
// ------------------------------------------------------------------------
// 4.Clear all flag
ADC_ClearFlag(ADC0, 0xFFFFFFFF);
// ------------------------------------------------------------------------
// 5.Start Calibration
ADC_StartCalibration(ADC0, ENABLE);
// 6.Select Exnternal Channel (PA4)
// ADC_ExternalChannel_Select(ADC0, ADC_ExtAIN4);
ADC_InternalChannel_Select(ADC0, ADC_INT_IVREF);
// ADC_ExternalChannel_Select(ADC0, ADC_ExtAIN4);
// ------------------------------------------------------------------------
// 7.Trigger Source select and Start conversion
ADC_TriggerSource_Select(ADC0, ADC_START);
}
int main()
{
int i;
double y;
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
PINX_InitStruct.PINX_Mode = PINX_Mode_Analog_IO; // Pin select digital input mode
PINX_InitStruct.PINX_Alternate_Function = 0; // Pin AFS = 0
GPIO_PinMode_Config(PINA(4),&PINX_InitStruct); // D6 setup at PA4
Sample_URT0_Init();
printf("hellon");
ADC_Init();
for(i=0;i<200;i++);
i=0;
while(1)
{
i++;
if(i>=500000)
{
// PE15=~PE15;
i=1;
ADC_SoftwareConversion_Cmd(ADC0, ENABLE);
// ------------------------------------------------------------------------
// 8.until E1CNVF & clear flag
while(ADC_GetSingleFlagStatus(ADC0, ADC_E1CNVF) == DRV_UnHappened);
ADC_ClearFlag(ADC0, ADC_E1CNVF);
y=((ADC_GetDAT0Data(ADC0)*5)/4096.0); //This is the Voltage of PA4
printf("%lfn",y);
}
}
}

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