仅使用寄存器在连续模式下对 STM32H747 ADC 进行编程
Programming STM32H747 ADC in continuous mode using registers only
在我的一个项目中，我使用DMA在STM32H747的两个内核之间共享数据，数据来自内核M7控制的ADC。在测试我的 DMA 时，我注意到 DMA 存储在内存中的数据没有变化，并注意到我的 ADC 没有按预期工作。我为我的 ADC 写了一个测试代码，让它在单端模式和连续模式下工作。所以首先我初始化我的 ADC :
void ADC_Init (void) {
uint32_t ISR = *ADC_ISR;
uint32_t IER = *ADC_IER;
uint32_t CR = *ADC_CR;
uint32_t CFGR = *ADC_CFGR;
uint32_t CFGR2 = *ADC_CFGR2;
uint32_t SMPR1 = *ADC_SMPR1;
uint32_t PCSEL = *ADC_PCSEL;
uint32_t DR = *ADC_DR;
uint32_t DIFSEL = *ADC_DIFSEL;
uint32_t SQR1 = *ADC_SQR1;
uint32_t SQR2 = *ADC_SQR2;
uint32_t SQR3 = *ADC_SQR3;
uint32_t SQR4 = *ADC_SQR4;
uint32_t CSR = *ADC1_CSR;
uint32_t CCR = *ADC1_CCR;
*RCC_AHB4ENR |= (1 << 0); //Enable clock GPIO port A
*GPIOA_MODER |= (3 << 0); //Analog mode port 0
/******Enable ADC Voltage regulator******/
CR = 0x00000000; //Fin du deep power down
*ADC_CR = CR;
CR = 0x10000000; //ADC voltage regulator Enable
*ADC_CR = CR;
while (*ADC_CR & (1 << 28) != 0) {} //check volatage enable (peut etre remplacé par un :
//delayMicroseconds(5); mais c'est moins safe)
//Petit interlude Differentiel ou single ended (a faire avant ADEN)---------
DIFSEL = 0x00000000;
*ADC_DIFSEL = DIFSEL;
//digitalWrite(LEDR, LOW);
//while (!(ADC1_ISR & (1<<12))); //LDORDY: ADC LDO output voltage ready bit
/******Calibrate ADC*********/
/******Enable ADC CLOCK******/
*RCC_AHB1ENR |= (1 << 5); //ADC peripheral clock enable
//RCC_D3CCIPR&= ~(7<<16)// ADCSEL[1:0]: SAR ADC kernel clock source selection default
digitalWrite(LEDB, LOW);
delay(2000);
digitalWrite(LEDB, HIGH);
delay(2000);
digitalWrite(LEDB, LOW);
delay(2000);
digitalWrite(LEDB, HIGH);
/******Set the prescalar******/
CCR = 0x000F0000;
*ADC1_CCR = CCR;
/******Set Scan Mode Data Management and resolution******/
CFGR |= (6 << 2); //RES[2:0]: Data resolution 110=12bits
CFGR &= ~(3 << 0); //DMNGT[1:0]: Data Management configuration 00 data stored in DR only
*ADC_CFGR = CFGR;
*ADC_CFGR2 |= (1 << 5);
//ADC regular sequence register 1
SQR1 = 0x0000040; //1st conv correspond au chan 0 (00000) et on réalise une conv par sequence de 1 conv(0000)
*ADC_SQR1 = SQR1;
/******Set the Continuous Conversion, ******/
CFGR |= (1 << 13); //CONT: Single / continuous conversion mode for regular conversions
*ADC_CFGR = CFGR;
/******Set the Sampling Time for the channels in ADC_SMPRx******/
SMPR1 = (7 << 0); //SMP0[2:0]: Channel 0 sampling time selection 011: 16.5 ADC clock cycles
*ADC_SMPR1 = SMPR1;
PCSEL |= (1 << 0); //PCSEL[19:0] :Channel 0 (VINP[i]) pre selection
*ADC_PCSEL = PCSEL;
/******Set singleEnded Input******/
DIFSEL &= ~(1 << 0); //DIFSEL[19:0]: single ended mode for channel 0
*ADC_DIFSEL = DIFSEL;
}
我从 :
开始
void ADC_start (void) {
uint32_t ISR = *ADC_ISR;
uint32_t IER = *ADC_IER;
uint32_t CR = *ADC_CR;
uint32_t CFGR = *ADC_CFGR;
uint32_t CFGR2 = *ADC_CFGR2;
uint32_t SMPR1 = *ADC_SMPR1;
uint32_t PCSEL = *ADC_PCSEL;
uint32_t DR = *ADC_DR;
uint32_t DIFSEL = *ADC_DIFSEL;
uint32_t SQR1 = *ADC_SQR1;
uint32_t SQR2 = *ADC_SQR2;
uint32_t SQR3 = *ADC_SQR3;
uint32_t SQR4 = *ADC_SQR4;
uint32_t CSR = *ADC1_CSR;
uint32_t CCR = *ADC1_CCR;
CR &= ~(1 << 30);
*ADC_CR = CR;
//On a deja ADCALDIF en single ended inputs mode par nos initialisations précédentes
CR = (1 << 16); //ADCALLIN calibration linéaire ET offset
*ADC_CR = CR;
//CR=0x90010001;
*ADC_CR |= (1 << 31); //Lancer une calibration ADCAL=1
//dataFromRegister=*ADC_CR;
while (*ADC_CR & (1 << 31) != 0) {
digitalWrite(LEDR, HIGH);
delay(1000);
digitalWrite(LEDR, LOW);
delay(1000);
} digitalWrite(LEDR, HIGH);
//On attends que la calibration soit complète par un reset de ADCAL
//Processus de calibration terminé (Serial.println(/*dataFromRegister,BIN*/"calibration");)
dataFromRegister=*ADC_CR;
Serial.println(dataFromRegister,BIN);
/******Enable ADC******/
*ADC_ISR |= (1 << 0); // Reset ADC ready flag
*ADC_CR |= (1 << 0); //Enable ADC
while (!(*ADC_ISR & (1 << 0))); //Wait for ready flag
*ADC_ISR |= (1 << 0);
//*ADC_CR |= (3 << 8);//11 boost if ADC Clock entre 25 et 50MHz
CR |= (1 << 2); //ADSTART
*ADC_CR = CR;
// if (*ADC_ISR & (1 << 1)) {
// CR |= (1 << 2); //ADSTART
// *ADC_CR = CR;
// }
//while(!(*ADC_ISR & (1 << 1)));
digitalWrite(LEDR, LOW);
}
现在连续转换模式应该连续开始新的转换，并设置我可以检查的EOC（转换结束）标志去读取ADC_DR（数据寄存器）。这就是我在循环中所做的：
void loop() {
Serial.println("Begin Loop");
while ((*ADC_ISR & (1 << 2)) == 0) {
Serial.print(".");
delay(100);
}
dataFromADC = *ADC_DR;
*ADC_ISR|=(1<<2);
Serial.println(dataFromADC, BIN);
digitalWrite(LEDB, LOW);
}
根据数据表，如果我从 ADC_DR 寄存器中读取数据，EOC 标志应该会自行重置，但如果不强制它自行重置，此代码将无法工作（即使它随机工作）。我必须承认我在这里完全迷失了为什么它不起作用，我目前正在检查我的代码的每一部分（主要使用 digitalWrite 检查代码停止的位置并且没有 EOC 重置它在 EOC 检查中停止但仍然给我同样的 100000000000 ADC_DR 无论我在引脚 PA_0C 上输入什么信号都会读取。这是我定义寄存器的方式：
//GPIO REG----------------------------------------
volatile uint32_t* const GPIOA_MODER = (uint32_t *) 0x58020000;//Port GPIOA correspondant à l'ADC0
//--------------------ADC REGISTRES-------------------//
volatile uint32_t* const ADC_ISR = (uint32_t *) 0x40022000;//Interupt and status register
volatile uint32_t* const ADC_IER = (uint32_t *) 0x40022004;//Interupt enable register
volatile uint32_t* const ADC_CR = (uint32_t *) 0x40022008;//Control register
volatile uint32_t* const ADC_CFGR = (uint32_t *) 0x4002200C;//COnfiguration register
volatile uint32_t* const ADC_CFGR2 = (uint32_t *) 0x40022010;//2eme conf regrister
volatile uint32_t* const ADC_SMPR1 = (uint32_t *) 0x40022014; //Sample time reg (directement lié au temps de calc de l'ADC)
volatile uint32_t* const ADC_SMPR2 = (uint32_t *) 0x40022018;
volatile uint32_t* const ADC_PCSEL = (uint32_t*) 0x4002201C;//channel preselection register on choisis un chan pour la conv
volatile uint32_t* const ADC_DR = (uint32_t *) 0x40022040;//Registre où l'on stocke le resultat des conv
volatile uint32_t* const ADC_DIFSEL = (uint32_t *) 0x400220C0;
volatile uint32_t* const ADC_SQR1 = (uint32_t *) 0x40022030;
volatile uint32_t* const ADC_SQR2 = (uint32_t *) 0x40022034;
volatile uint32_t* const ADC_SQR3 = (uint32_t *) 0x40022038;
volatile uint32_t* const ADC_SQR4 = (uint32_t *) 0x4002203C;
volatile uint32_t* const ADC1_CSR = (uint32_t *) 0x40022300;//ADC1 common status register
volatile uint32_t* const ADC1_CCR = (uint32_t *)0x40022308; //ADC1 Common Control Register
//REG RCC-----------------------------------------------
volatile uint32_t* const RCC_APB4ENR = (uint32_t *) 0x580244F4;//to enable sysconf
volatile uint32_t* const RCC_AHB4ENR = (uint32_t *) 0x580244E0;
volatile uint32_t* const RCC_AHB1ENR = (uint32_t *) 0x580244D8;
volatile uint32_t* const RCC_CR = (uint32_t *) 0x58024400;
volatile uint32_t* const RCC_CFGR = (uint32_t *) 0x58024410;
volatile uint32_t* const RCC_D1CFGR = (uint32_t *) 0x58024418;
volatile uint32_t* const RCC_D2CFGR = (uint32_t *) 0x5802441C;
volatile uint32_t* const RCC_D3CFGR = (uint32_t *) 0x58024420;
volatile uint32_t* const RCC_PLLCKSELR = (uint32_t *) 0x58024428;
volatile uint32_t* const RCC_PLLCFGR = (uint32_t *) 0x5802442C;
volatile uint32_t* const RCC_PLL1DIVR = (uint32_t *) 0x58024430;
volatile uint32_t* const RCC_PLL1FRACR = (uint32_t *) 0x58024434;
volatile uint32_t* const RCC_PLL2DIVR = (uint32_t *) 0x58024438;
volatile uint32_t* const RCC_PLL2FRACR = (uint32_t *) 0x5802443C;
volatile uint32_t* const RCC_PLL3DIVR = (uint32_t *) 0x58024440;
volatile uint32_t* const RCC_PLL3FRACR = (uint32_t *) 0x58024444;
volatile uint32_t* const RCC_CIER = (uint32_t *) 0x58024460;
我必须说我不再确定 ADC1_CCR 地址，在数据表中他们说要向主基地址添加 0x300 偏移量，我认为基地址是 ADC1- 的地址ADC2 参考数据表第 140 页：https://www.st.com/resource/en/reference_manual/dm00176879-stm32h745755-and-stm32h747757-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
但是，如果我误解了 ADC1 和 ADC2 的主地址是什么，那将解释很多事情，因为不再定义时钟。
我会继续努力，欢迎任何建议。
这里的工作代码（我切换到 CMSIS）在我的第一个版本中有很多错误它似乎也只适用于 PA0_C 如果我使用 ADC2 而不是 ADC1:
#include <Arduino.h>
#define HWREG(x) (*((volatile uint32_t *)(x)))
// put your setup code here, to run once:
void GPIOH_Init();
void GPIOH_Port15_Toggle();
//void SystemClock_Config();
void SystemCLCKInit();
//void SysPinConfig(); //For future tests of ADC with EXTI1 IT (put the pin setup PA0 PA0_C here as well)
void ADC_start();
void ADC_Init();
//void VREFBUF_Init();
//void ADC_Reset();
uint32_t dataFromADC = 0;
int dataFromRegister = 0;
int nbSamples = 0;
void setup() {
Serial.begin(115200);
SystemCLCKInit();
// put your setup code here, to run once:
//SystemClock_Config();
GPIOH_Init();
digitalWrite(LEDR, LOW);
delay(1000);
VREFBUF_Init();
digitalWrite(LEDR, HIGH);
digitalWrite(LEDB, LOW);
delay(1000);
ADC_Init();
//analogReference(EXTERNAL);
digitalWrite(LEDB, HIGH);
digitalWrite(LEDG, LOW);
delay(1000);
ADC_Start();
digitalWrite(LEDG, HIGH);
digitalWrite(LEDB, LOW);
}
void loop() {
// put your main code here, to run repeatedly:
while(ADC_ISR_EOC & ADC_ISR_EOC_Msk!=1){//check end of conversion
// dataFromRegister=READ_REG(ADC2->ISR);
// Serial.print("Flag :");
// Serial.println(dataFromRegister,BIN);
//delay(100);
}dataFromADC = READ_REG(ADC2->DR);
Serial.print("ADC_DR:");
Serial.println(dataFromADC);
GPIOH_Port15_Toggle();
}
void VREFBUF_Init(void) {
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_VREFEN_Msk);
//RCC_APB4ENR_VREFEN;
//RCC->APB4ENR|=(1<<RCC_APB4ENR_VREFEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("CLCK : ");
Serial.println(dataFromRegister,BIN);
delay(1000);
SET_BIT(VREFBUF->CSR,VREFBUF_CSR_ENVR_Msk);
CLEAR_BIT(VREFBUF->CSR,VREFBUF_CSR_HIZ_Msk);
while(VREFBUF_CSR_VRR & VREFBUF_CSR_VRR_Msk !=1){
dataFromRegister=READ_REG(VREFBUF->CSR);
Serial.println(dataFromRegister,BIN);
}
}
void ADC_Init(void) {
/***************CLOCK and PIN config******************/
// MODIFY_REG(RCC->D3CCIPR,RCC_D3CCIPR_ADCSEL_Msk,0x1L);
// delay(1000);
// dataFromRegister=READ_REG(RCC->D3CCIPR);
// Serial.print("D3CCIPR :");
// Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_SYSCFGEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("RCC_APB4ENR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_RTCAPBEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("RCC_APB4ENR1:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->AHB1ENR,RCC_AHB1ENR_ADC12EN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB1ENR);
Serial.print("RCC_AHB1ENR:");
Serial.println(dataFromRegister,BIN);
//GPIOA PORT 1------------------------------------
SET_BIT(RCC->AHB4ENR,RCC_AHB4ENR_GPIOAEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB4ENR);
Serial.print("RCC_AHB4ENR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(GPIOA->MODER, GPIO_MODER_MODE1_0);
SET_BIT(GPIOA->MODER, GPIO_MODER_MODE1_1);
CLEAR_BIT(GPIOA->PUPDR, GPIO_PUPDR_PUPD1_0);
CLEAR_BIT(GPIOA->PUPDR, GPIO_PUPDR_PUPD1_1);
SET_BIT(SYSCFG->PMCR, SYSCFG_PMCR_PA0SO_Msk);
delay(1000);
dataFromRegister=READ_REG(SYSCFG->PMCR);
Serial.print("SYSCFG->PMCR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->AHB1ENR,RCC_AHB1ENR_ADC12EN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB1ENR);
Serial.print("RCC->AHB1ENR2:");
Serial.println(dataFromRegister,BIN);
/***************ADC not Enabled yet********************/
//ADC VOLTAGE REGULATOR-----------------------------
CLEAR_BIT(ADC2->CR,ADC_CR_DEEPPWD_Msk);
//dataFromRegister=READ_REG(ADC2->CR);
//Serial.print("ADCR: ");
//Serial.println(dataFromRegister,BIN);
//delay(1000);
SET_BIT(ADC2->CR,ADC_CR_ADVREGEN_Msk);
delay(1000);
dataFromRegister=READ_REG(ADC2->CR);
Serial.print("ADCAL: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
//
//ADC CALIBRATION-----------------------------------
CLEAR_BIT(ADC2->CR,ADC_CR_ADCALDIF_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADCALLIN_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADCAL_Msk);
while(ADC_CR_ADCAL & ADC_CR_ADCAL_Msk!=0){
dataFromRegister=READ_REG(ADC2->CR);
Serial.print("ADC2_CR: ");
Serial.println(dataFromRegister,BIN);
}
//ADC prescaler selection clock and sample time delay
//MODIFY_REG(ADC22_COMMON->CCR,ADC_CCR_CKMODE | ADC_CCR_PRESC | ADC_CCR_DELAY ,0x3UL | 0x3UL | 0x8UL);
SET_BIT(ADC12_COMMON->CCR, ADC_CCR_CKMODE_0 | ADC_CCR_CKMODE_1 | ADC_CCR_PRESC_0 | ADC_CCR_PRESC_1 | ADC_CCR_DELAY_3);
// MODIFY_REG(ADC12_COMMON->CCR,ADC_CCR_PRESC_Msk,0x3UL);
// MODIFY_REG(ADC12_COMMON->CCR,ADC_CCR_DELAY_Msk,0x8UL);
dataFromRegister=READ_REG(ADC12_COMMON->CCR);
Serial.print("ADC_CCR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
//Set input mode------------------------------------
CLEAR_BIT(ADC2->DIFSEL,ADC_DIFSEL_DIFSEL_0);
/*******************ADC Enable**********************/
SET_BIT(ADC2->ISR,ADC_ISR_ADRDY_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADEN_Msk);
while(ADC_ISR_ADRDY & ADC_ISR_ADRDY_Msk !=1){}
SET_BIT(ADC2->ISR,ADC_ISR_ADRDY_Msk);
/********************ADC Enabled********************/
//ADC CFGR------------------------------------------
SET_BIT(ADC2->CFGR, ADC_CFGR_RES_2 | ADC_CFGR_RES_1 | ADC_CFGR_OVRMOD_Msk | ADC_CFGR_CONT_Msk);
CLEAR_BIT(ADC2->CFGR, ADC_CFGR_DMNGT_0 | ADC_CFGR_DMNGT_1 | ADC_CFGR_RES_0 | ADC_CFGR_EXTEN_0 | ADC_CFGR_EXTEN_1);
//DATA ALIGNEMENT-----------------------------------
// ADC PCSEL----------------------------------------
SET_BIT(ADC2->PCSEL,ADC_PCSEL_PCSEL_0);
//ADC SQR1------------------------------------------
//SET_BIT(ADC2->SQR1,ADC_SQR1_SQ1_1);
//ADC SMPR1-----------------------------------------
SET_BIT(ADC2->SMPR1,ADC_SMPR1_SMP0_0 | ADC_SMPR1_SMP0_1);
}
void ADC_Start(void) {
SET_BIT(ADC2->CR,ADC_CR_ADSTART_Msk);
}
void GPIOH_Init(void) {
SET_BIT(RCC->AHB4ENR,RCC_AHB4ENR_GPIOHEN_Msk);
delay(1000);
SET_BIT(GPIOH->MODER, GPIO_MODER_MODE15_0);
CLEAR_BIT(GPIOH->MODER, GPIO_MODER_MODE15_1);
CLEAR_BIT(GPIOH->OTYPER, GPIO_OTYPER_OT15);
}
void GPIOH_Port15_Toggle(void) {
SET_BIT(GPIOH->BSRR, GPIO_BSRR_BS15);
CLEAR_BIT(GPIOH->BSRR, GPIO_BSRR_BS15);
SET_BIT(GPIOH->BSRR, GPIO_BSRR_BR15);
CLEAR_BIT(GPIOH->BSRR, GPIO_BSRR_BR15);
}
void SystemCLCKInit(void) {
/* Enable the floating-point unit. Any configuration of the
floating-point unit must be done here prior to it being enabled */
HWREG(0xE000ED88) = ((HWREG(0xE000ED88) & ~0x00F00000) | 0x00F00000);
/*------- Reset the RCC clock configuration to the default reset state -------*/
/* Set HSION bit */
RCC->CR |= 0x00000001;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset CFGR register */
RCC->CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->CFGR);
Serial.print("RCC->CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset HSEON, CSSON , CSION,RC48ON, CSIKERON PLL1ON, PLL2ON and PLL3ON bits */
RCC->CR &= (uint32_t)0xEAF6ED7F;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("RCC->CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D1CFGR register */
RCC->D1CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D1CFGR);
Serial.print("RCC->D1CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D2CFGR register */
RCC->D2CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D2CFGR);
Serial.print("RCC->D2CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D3CFGR register */
RCC->D3CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D3CFGR);
Serial.print("RCC->D3CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLLCKSELR register */
RCC->PLLCKSELR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLLCKSELR);
Serial.print("RCC->PLLCKSELR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLLCFGR register */
RCC->PLLCFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLLCFGR);
Serial.print("RCC->PLLCFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL1DIVR register */
RCC->PLL1DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL1DIVR);
Serial.print("RCC->PLL1DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL1FRACR register */
RCC->PLL1FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL1FRACR);
Serial.print("RCC->PLL1FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL2DIVR register */
RCC->PLL2DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL2DIVR);
Serial.print("RCC->PLL2DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL2FRACR register */
RCC->PLL2FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL2FRACR);
Serial.print("RCC->PLL2FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL3DIVR register */
RCC->PLL3DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL3DIVR);
Serial.print("RCC->PLL3DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL3FRACR register */
RCC->PLL3FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL3FRACR);
Serial.print("RCC->PLL3FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset HSEBYP bit */
RCC->CR &= (uint32_t)0xFFFBFFFF;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("RCC->CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Disable all interrupts */
RCC->CIER = 0x00000000;
dataFromRegister=READ_REG(RCC->CIER);
Serial.print("RCC->CIER : ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Change the switch matrix read issuing capability to 1 for the AXI SRAM target (Target 7) */
HWREG(0x51008108) = 0x000000001;
}
感谢您以某种方式帮助我用 CMSIS 重新定义一切，突出了我的一些错误。
在我的一个项目中，我使用DMA在STM32H747的两个内核之间共享数据，数据来自内核M7控制的ADC。在测试我的 DMA 时，我注意到 DMA 存储在内存中的数据没有变化，并注意到我的 ADC 没有按预期工作。我为我的 ADC 写了一个测试代码，让它在单端模式和连续模式下工作。所以首先我初始化我的 ADC :
void ADC_Init (void) {
uint32_t ISR = *ADC_ISR;
uint32_t IER = *ADC_IER;
uint32_t CR = *ADC_CR;
uint32_t CFGR = *ADC_CFGR;
uint32_t CFGR2 = *ADC_CFGR2;
uint32_t SMPR1 = *ADC_SMPR1;
uint32_t PCSEL = *ADC_PCSEL;
uint32_t DR = *ADC_DR;
uint32_t DIFSEL = *ADC_DIFSEL;
uint32_t SQR1 = *ADC_SQR1;
uint32_t SQR2 = *ADC_SQR2;
uint32_t SQR3 = *ADC_SQR3;
uint32_t SQR4 = *ADC_SQR4;
uint32_t CSR = *ADC1_CSR;
uint32_t CCR = *ADC1_CCR;
*RCC_AHB4ENR |= (1 << 0); //Enable clock GPIO port A
*GPIOA_MODER |= (3 << 0); //Analog mode port 0
/******Enable ADC Voltage regulator******/
CR = 0x00000000; //Fin du deep power down
*ADC_CR = CR;
CR = 0x10000000; //ADC voltage regulator Enable
*ADC_CR = CR;
while (*ADC_CR & (1 << 28) != 0) {} //check volatage enable (peut etre remplacé par un :
//delayMicroseconds(5); mais c'est moins safe)
//Petit interlude Differentiel ou single ended (a faire avant ADEN)---------
DIFSEL = 0x00000000;
*ADC_DIFSEL = DIFSEL;
//digitalWrite(LEDR, LOW);
//while (!(ADC1_ISR & (1<<12))); //LDORDY: ADC LDO output voltage ready bit
/******Calibrate ADC*********/
/******Enable ADC CLOCK******/
*RCC_AHB1ENR |= (1 << 5); //ADC peripheral clock enable
//RCC_D3CCIPR&= ~(7<<16)// ADCSEL[1:0]: SAR ADC kernel clock source selection default
digitalWrite(LEDB, LOW);
delay(2000);
digitalWrite(LEDB, HIGH);
delay(2000);
digitalWrite(LEDB, LOW);
delay(2000);
digitalWrite(LEDB, HIGH);
/******Set the prescalar******/
CCR = 0x000F0000;
*ADC1_CCR = CCR;
/******Set Scan Mode Data Management and resolution******/
CFGR |= (6 << 2); //RES[2:0]: Data resolution 110=12bits
CFGR &= ~(3 << 0); //DMNGT[1:0]: Data Management configuration 00 data stored in DR only
*ADC_CFGR = CFGR;
*ADC_CFGR2 |= (1 << 5);
//ADC regular sequence register 1
SQR1 = 0x0000040; //1st conv correspond au chan 0 (00000) et on réalise une conv par sequence de 1 conv(0000)
*ADC_SQR1 = SQR1;
/******Set the Continuous Conversion, ******/
CFGR |= (1 << 13); //CONT: Single / continuous conversion mode for regular conversions
*ADC_CFGR = CFGR;
/******Set the Sampling Time for the channels in ADC_SMPRx******/
SMPR1 = (7 << 0); //SMP0[2:0]: Channel 0 sampling time selection 011: 16.5 ADC clock cycles
*ADC_SMPR1 = SMPR1;
PCSEL |= (1 << 0); //PCSEL[19:0] :Channel 0 (VINP[i]) pre selection
*ADC_PCSEL = PCSEL;
/******Set singleEnded Input******/
DIFSEL &= ~(1 << 0); //DIFSEL[19:0]: single ended mode for channel 0
*ADC_DIFSEL = DIFSEL;
}
我从 :
开始void ADC_start (void) {
uint32_t ISR = *ADC_ISR;
uint32_t IER = *ADC_IER;
uint32_t CR = *ADC_CR;
uint32_t CFGR = *ADC_CFGR;
uint32_t CFGR2 = *ADC_CFGR2;
uint32_t SMPR1 = *ADC_SMPR1;
uint32_t PCSEL = *ADC_PCSEL;
uint32_t DR = *ADC_DR;
uint32_t DIFSEL = *ADC_DIFSEL;
uint32_t SQR1 = *ADC_SQR1;
uint32_t SQR2 = *ADC_SQR2;
uint32_t SQR3 = *ADC_SQR3;
uint32_t SQR4 = *ADC_SQR4;
uint32_t CSR = *ADC1_CSR;
uint32_t CCR = *ADC1_CCR;
CR &= ~(1 << 30);
*ADC_CR = CR;
//On a deja ADCALDIF en single ended inputs mode par nos initialisations précédentes
CR = (1 << 16); //ADCALLIN calibration linéaire ET offset
*ADC_CR = CR;
//CR=0x90010001;
*ADC_CR |= (1 << 31); //Lancer une calibration ADCAL=1
//dataFromRegister=*ADC_CR;
while (*ADC_CR & (1 << 31) != 0) {
digitalWrite(LEDR, HIGH);
delay(1000);
digitalWrite(LEDR, LOW);
delay(1000);
} digitalWrite(LEDR, HIGH);
//On attends que la calibration soit complète par un reset de ADCAL
//Processus de calibration terminé (Serial.println(/*dataFromRegister,BIN*/"calibration");)
dataFromRegister=*ADC_CR;
Serial.println(dataFromRegister,BIN);
/******Enable ADC******/
*ADC_ISR |= (1 << 0); // Reset ADC ready flag
*ADC_CR |= (1 << 0); //Enable ADC
while (!(*ADC_ISR & (1 << 0))); //Wait for ready flag
*ADC_ISR |= (1 << 0);
//*ADC_CR |= (3 << 8);//11 boost if ADC Clock entre 25 et 50MHz
CR |= (1 << 2); //ADSTART
*ADC_CR = CR;
// if (*ADC_ISR & (1 << 1)) {
// CR |= (1 << 2); //ADSTART
// *ADC_CR = CR;
// }
//while(!(*ADC_ISR & (1 << 1)));
digitalWrite(LEDR, LOW);
}
现在连续转换模式应该连续开始新的转换，并设置我可以检查的EOC（转换结束）标志去读取ADC_DR（数据寄存器）。这就是我在循环中所做的：
void loop() {
Serial.println("Begin Loop");
while ((*ADC_ISR & (1 << 2)) == 0) {
Serial.print(".");
delay(100);
}
dataFromADC = *ADC_DR;
*ADC_ISR|=(1<<2);
Serial.println(dataFromADC, BIN);
digitalWrite(LEDB, LOW);
}
根据数据表，如果我从 ADC_DR 寄存器中读取数据，EOC 标志应该会自行重置，但如果不强制它自行重置，此代码将无法工作（即使它随机工作）。我必须承认我在这里完全迷失了为什么它不起作用，我目前正在检查我的代码的每一部分（主要使用 digitalWrite 检查代码停止的位置并且没有 EOC 重置它在 EOC 检查中停止但仍然给我同样的 100000000000 ADC_DR 无论我在引脚 PA_0C 上输入什么信号都会读取。这是我定义寄存器的方式：
//GPIO REG----------------------------------------
volatile uint32_t* const GPIOA_MODER = (uint32_t *) 0x58020000;//Port GPIOA correspondant à l'ADC0
//--------------------ADC REGISTRES-------------------//
volatile uint32_t* const ADC_ISR = (uint32_t *) 0x40022000;//Interupt and status register
volatile uint32_t* const ADC_IER = (uint32_t *) 0x40022004;//Interupt enable register
volatile uint32_t* const ADC_CR = (uint32_t *) 0x40022008;//Control register
volatile uint32_t* const ADC_CFGR = (uint32_t *) 0x4002200C;//COnfiguration register
volatile uint32_t* const ADC_CFGR2 = (uint32_t *) 0x40022010;//2eme conf regrister
volatile uint32_t* const ADC_SMPR1 = (uint32_t *) 0x40022014; //Sample time reg (directement lié au temps de calc de l'ADC)
volatile uint32_t* const ADC_SMPR2 = (uint32_t *) 0x40022018;
volatile uint32_t* const ADC_PCSEL = (uint32_t*) 0x4002201C;//channel preselection register on choisis un chan pour la conv
volatile uint32_t* const ADC_DR = (uint32_t *) 0x40022040;//Registre où l'on stocke le resultat des conv
volatile uint32_t* const ADC_DIFSEL = (uint32_t *) 0x400220C0;
volatile uint32_t* const ADC_SQR1 = (uint32_t *) 0x40022030;
volatile uint32_t* const ADC_SQR2 = (uint32_t *) 0x40022034;
volatile uint32_t* const ADC_SQR3 = (uint32_t *) 0x40022038;
volatile uint32_t* const ADC_SQR4 = (uint32_t *) 0x4002203C;
volatile uint32_t* const ADC1_CSR = (uint32_t *) 0x40022300;//ADC1 common status register
volatile uint32_t* const ADC1_CCR = (uint32_t *)0x40022308; //ADC1 Common Control Register
//REG RCC-----------------------------------------------
volatile uint32_t* const RCC_APB4ENR = (uint32_t *) 0x580244F4;//to enable sysconf
volatile uint32_t* const RCC_AHB4ENR = (uint32_t *) 0x580244E0;
volatile uint32_t* const RCC_AHB1ENR = (uint32_t *) 0x580244D8;
volatile uint32_t* const RCC_CR = (uint32_t *) 0x58024400;
volatile uint32_t* const RCC_CFGR = (uint32_t *) 0x58024410;
volatile uint32_t* const RCC_D1CFGR = (uint32_t *) 0x58024418;
volatile uint32_t* const RCC_D2CFGR = (uint32_t *) 0x5802441C;
volatile uint32_t* const RCC_D3CFGR = (uint32_t *) 0x58024420;
volatile uint32_t* const RCC_PLLCKSELR = (uint32_t *) 0x58024428;
volatile uint32_t* const RCC_PLLCFGR = (uint32_t *) 0x5802442C;
volatile uint32_t* const RCC_PLL1DIVR = (uint32_t *) 0x58024430;
volatile uint32_t* const RCC_PLL1FRACR = (uint32_t *) 0x58024434;
volatile uint32_t* const RCC_PLL2DIVR = (uint32_t *) 0x58024438;
volatile uint32_t* const RCC_PLL2FRACR = (uint32_t *) 0x5802443C;
volatile uint32_t* const RCC_PLL3DIVR = (uint32_t *) 0x58024440;
volatile uint32_t* const RCC_PLL3FRACR = (uint32_t *) 0x58024444;
volatile uint32_t* const RCC_CIER = (uint32_t *) 0x58024460;
我必须说我不再确定 ADC1_CCR 地址，在数据表中他们说要向主基地址添加 0x300 偏移量，我认为基地址是 ADC1- 的地址ADC2 参考数据表第 140 页：https://www.st.com/resource/en/reference_manual/dm00176879-stm32h745755-and-stm32h747757-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
但是，如果我误解了 ADC1 和 ADC2 的主地址是什么，那将解释很多事情，因为不再定义时钟。
我会继续努力，欢迎任何建议。
这里的工作代码（我切换到 CMSIS）在我的第一个版本中有很多错误它似乎也只适用于 PA0_C 如果我使用 ADC2 而不是 ADC1:
#include <Arduino.h>
#define HWREG(x) (*((volatile uint32_t *)(x)))
// put your setup code here, to run once:
void GPIOH_Init();
void GPIOH_Port15_Toggle();
//void SystemClock_Config();
void SystemCLCKInit();
//void SysPinConfig(); //For future tests of ADC with EXTI1 IT (put the pin setup PA0 PA0_C here as well)
void ADC_start();
void ADC_Init();
//void VREFBUF_Init();
//void ADC_Reset();
uint32_t dataFromADC = 0;
int dataFromRegister = 0;
int nbSamples = 0;
void setup() {
Serial.begin(115200);
SystemCLCKInit();
// put your setup code here, to run once:
//SystemClock_Config();
GPIOH_Init();
digitalWrite(LEDR, LOW);
delay(1000);
VREFBUF_Init();
digitalWrite(LEDR, HIGH);
digitalWrite(LEDB, LOW);
delay(1000);
ADC_Init();
//analogReference(EXTERNAL);
digitalWrite(LEDB, HIGH);
digitalWrite(LEDG, LOW);
delay(1000);
ADC_Start();
digitalWrite(LEDG, HIGH);
digitalWrite(LEDB, LOW);
}
void loop() {
// put your main code here, to run repeatedly:
while(ADC_ISR_EOC & ADC_ISR_EOC_Msk!=1){//check end of conversion
// dataFromRegister=READ_REG(ADC2->ISR);
// Serial.print("Flag :");
// Serial.println(dataFromRegister,BIN);
//delay(100);
}dataFromADC = READ_REG(ADC2->DR);
Serial.print("ADC_DR:");
Serial.println(dataFromADC);
GPIOH_Port15_Toggle();
}
void VREFBUF_Init(void) {
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_VREFEN_Msk);
//RCC_APB4ENR_VREFEN;
//RCC->APB4ENR|=(1<<RCC_APB4ENR_VREFEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("CLCK : ");
Serial.println(dataFromRegister,BIN);
delay(1000);
SET_BIT(VREFBUF->CSR,VREFBUF_CSR_ENVR_Msk);
CLEAR_BIT(VREFBUF->CSR,VREFBUF_CSR_HIZ_Msk);
while(VREFBUF_CSR_VRR & VREFBUF_CSR_VRR_Msk !=1){
dataFromRegister=READ_REG(VREFBUF->CSR);
Serial.println(dataFromRegister,BIN);
}
}
void ADC_Init(void) {
/***************CLOCK and PIN config******************/
// MODIFY_REG(RCC->D3CCIPR,RCC_D3CCIPR_ADCSEL_Msk,0x1L);
// delay(1000);
// dataFromRegister=READ_REG(RCC->D3CCIPR);
// Serial.print("D3CCIPR :");
// Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_SYSCFGEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("RCC_APB4ENR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->APB4ENR,RCC_APB4ENR_RTCAPBEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->APB4ENR);
Serial.print("RCC_APB4ENR1:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->AHB1ENR,RCC_AHB1ENR_ADC12EN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB1ENR);
Serial.print("RCC_AHB1ENR:");
Serial.println(dataFromRegister,BIN);
//GPIOA PORT 1------------------------------------
SET_BIT(RCC->AHB4ENR,RCC_AHB4ENR_GPIOAEN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB4ENR);
Serial.print("RCC_AHB4ENR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(GPIOA->MODER, GPIO_MODER_MODE1_0);
SET_BIT(GPIOA->MODER, GPIO_MODER_MODE1_1);
CLEAR_BIT(GPIOA->PUPDR, GPIO_PUPDR_PUPD1_0);
CLEAR_BIT(GPIOA->PUPDR, GPIO_PUPDR_PUPD1_1);
SET_BIT(SYSCFG->PMCR, SYSCFG_PMCR_PA0SO_Msk);
delay(1000);
dataFromRegister=READ_REG(SYSCFG->PMCR);
Serial.print("SYSCFG->PMCR:");
Serial.println(dataFromRegister,BIN);
SET_BIT(RCC->AHB1ENR,RCC_AHB1ENR_ADC12EN_Msk);
delay(1000);
dataFromRegister=READ_REG(RCC->AHB1ENR);
Serial.print("RCC->AHB1ENR2:");
Serial.println(dataFromRegister,BIN);
/***************ADC not Enabled yet********************/
//ADC VOLTAGE REGULATOR-----------------------------
CLEAR_BIT(ADC2->CR,ADC_CR_DEEPPWD_Msk);
//dataFromRegister=READ_REG(ADC2->CR);
//Serial.print("ADCR: ");
//Serial.println(dataFromRegister,BIN);
//delay(1000);
SET_BIT(ADC2->CR,ADC_CR_ADVREGEN_Msk);
delay(1000);
dataFromRegister=READ_REG(ADC2->CR);
Serial.print("ADCAL: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
//
//ADC CALIBRATION-----------------------------------
CLEAR_BIT(ADC2->CR,ADC_CR_ADCALDIF_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADCALLIN_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADCAL_Msk);
while(ADC_CR_ADCAL & ADC_CR_ADCAL_Msk!=0){
dataFromRegister=READ_REG(ADC2->CR);
Serial.print("ADC2_CR: ");
Serial.println(dataFromRegister,BIN);
}
//ADC prescaler selection clock and sample time delay
//MODIFY_REG(ADC22_COMMON->CCR,ADC_CCR_CKMODE | ADC_CCR_PRESC | ADC_CCR_DELAY ,0x3UL | 0x3UL | 0x8UL);
SET_BIT(ADC12_COMMON->CCR, ADC_CCR_CKMODE_0 | ADC_CCR_CKMODE_1 | ADC_CCR_PRESC_0 | ADC_CCR_PRESC_1 | ADC_CCR_DELAY_3);
// MODIFY_REG(ADC12_COMMON->CCR,ADC_CCR_PRESC_Msk,0x3UL);
// MODIFY_REG(ADC12_COMMON->CCR,ADC_CCR_DELAY_Msk,0x8UL);
dataFromRegister=READ_REG(ADC12_COMMON->CCR);
Serial.print("ADC_CCR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
//Set input mode------------------------------------
CLEAR_BIT(ADC2->DIFSEL,ADC_DIFSEL_DIFSEL_0);
/*******************ADC Enable**********************/
SET_BIT(ADC2->ISR,ADC_ISR_ADRDY_Msk);
SET_BIT(ADC2->CR,ADC_CR_ADEN_Msk);
while(ADC_ISR_ADRDY & ADC_ISR_ADRDY_Msk !=1){}
SET_BIT(ADC2->ISR,ADC_ISR_ADRDY_Msk);
/********************ADC Enabled********************/
//ADC CFGR------------------------------------------
SET_BIT(ADC2->CFGR, ADC_CFGR_RES_2 | ADC_CFGR_RES_1 | ADC_CFGR_OVRMOD_Msk | ADC_CFGR_CONT_Msk);
CLEAR_BIT(ADC2->CFGR, ADC_CFGR_DMNGT_0 | ADC_CFGR_DMNGT_1 | ADC_CFGR_RES_0 | ADC_CFGR_EXTEN_0 | ADC_CFGR_EXTEN_1);
//DATA ALIGNEMENT-----------------------------------
// ADC PCSEL----------------------------------------
SET_BIT(ADC2->PCSEL,ADC_PCSEL_PCSEL_0);
//ADC SQR1------------------------------------------
//SET_BIT(ADC2->SQR1,ADC_SQR1_SQ1_1);
//ADC SMPR1-----------------------------------------
SET_BIT(ADC2->SMPR1,ADC_SMPR1_SMP0_0 | ADC_SMPR1_SMP0_1);
}
void ADC_Start(void) {
SET_BIT(ADC2->CR,ADC_CR_ADSTART_Msk);
}
void GPIOH_Init(void) {
SET_BIT(RCC->AHB4ENR,RCC_AHB4ENR_GPIOHEN_Msk);
delay(1000);
SET_BIT(GPIOH->MODER, GPIO_MODER_MODE15_0);
CLEAR_BIT(GPIOH->MODER, GPIO_MODER_MODE15_1);
CLEAR_BIT(GPIOH->OTYPER, GPIO_OTYPER_OT15);
}
void GPIOH_Port15_Toggle(void) {
SET_BIT(GPIOH->BSRR, GPIO_BSRR_BS15);
CLEAR_BIT(GPIOH->BSRR, GPIO_BSRR_BS15);
SET_BIT(GPIOH->BSRR, GPIO_BSRR_BR15);
CLEAR_BIT(GPIOH->BSRR, GPIO_BSRR_BR15);
}
void SystemCLCKInit(void) {
/* Enable the floating-point unit. Any configuration of the
floating-point unit must be done here prior to it being enabled */
HWREG(0xE000ED88) = ((HWREG(0xE000ED88) & ~0x00F00000) | 0x00F00000);
/*------- Reset the RCC clock configuration to the default reset state -------*/
/* Set HSION bit */
RCC->CR |= 0x00000001;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset CFGR register */
RCC->CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->CFGR);
Serial.print("RCC->CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset HSEON, CSSON , CSION,RC48ON, CSIKERON PLL1ON, PLL2ON and PLL3ON bits */
RCC->CR &= (uint32_t)0xEAF6ED7F;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("RCC->CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D1CFGR register */
RCC->D1CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D1CFGR);
Serial.print("RCC->D1CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D2CFGR register */
RCC->D2CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D2CFGR);
Serial.print("RCC->D2CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset D3CFGR register */
RCC->D3CFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->D3CFGR);
Serial.print("RCC->D3CFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLLCKSELR register */
RCC->PLLCKSELR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLLCKSELR);
Serial.print("RCC->PLLCKSELR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLLCFGR register */
RCC->PLLCFGR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLLCFGR);
Serial.print("RCC->PLLCFGR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL1DIVR register */
RCC->PLL1DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL1DIVR);
Serial.print("RCC->PLL1DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL1FRACR register */
RCC->PLL1FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL1FRACR);
Serial.print("RCC->PLL1FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL2DIVR register */
RCC->PLL2DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL2DIVR);
Serial.print("RCC->PLL2DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL2FRACR register */
RCC->PLL2FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL2FRACR);
Serial.print("RCC->PLL2FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL3DIVR register */
RCC->PLL3DIVR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL3DIVR);
Serial.print("RCC->PLL3DIVR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset PLL3FRACR register */
RCC->PLL3FRACR = 0x00000000;
dataFromRegister=READ_REG(RCC->PLL3FRACR);
Serial.print("RCC->PLL3FRACR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Reset HSEBYP bit */
RCC->CR &= (uint32_t)0xFFFBFFFF;
dataFromRegister=READ_REG(RCC->CR);
Serial.print("RCC->CR: ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Disable all interrupts */
RCC->CIER = 0x00000000;
dataFromRegister=READ_REG(RCC->CIER);
Serial.print("RCC->CIER : ");
Serial.println(dataFromRegister,BIN);
delay(1000);
/* Change the switch matrix read issuing capability to 1 for the AXI SRAM target (Target 7) */
HWREG(0x51008108) = 0x000000001;
}
感谢您以某种方式帮助我用 CMSIS 重新定义一切，突出了我的一些错误。