[问答]

为什么无法编译ESP8266上的SPI？

问答对人有帮助，内容完整，我也想知道答案 0 我得到了一些代码，我知道这些代码对为我做测试项目的编码员有用（我无法向他们寻求额外帮助）。该项目是让 ESP8266 作为 SPI 从设备运行。测试代码除了证明 Slave 和 Master 之间可以进行通信外，不做任何事。我相信编码员一定使用了他发现的现有代码，因为我在其他地方找到了对它的单一引用，但不是我遇到的问题。我遇到的问题是，当我编译代码时，出现以下错误： “ SERCOM1 ”未在此范围内声明挣扎。完整的草图是：代码：全选 #include const int slaveAPin = 10; //SERCOM1 10; // SERCOM4 16; static int sendCounter = 0; static int cmd = 0; void setup() { Serial.begin(9600); pinMode(slaveAPin, INPUT_PULLUP); attachInterrupt(10, SERCOM1_Handler, FALLING); spiSlave_init(); SERCOM1->SPI.DATA.reg = 0x12; } void loop() { //waste some time in a loop int var = 0; while(var < 200){ var++; } } void SERCOM1_Handler() { Serial.println("In SPI Interrupt Handler"); uint8_t data = 0; uint8_t junk = 0; data =(uint8_t)SERCOM1->SPI.DATA.reg; SERCOM1->SPI.DATA.reg = 0x12; uint8_t interrupts = SERCOM1->SPI.INTFLAG.reg; //Read SPI interrupt register Serial.print("Interrupts: "); Serial.println(interrupts); // If error interrupt then clear down and ignore if(interrupts & (1<<7)) { Serial.println("Error Interrupt"); SERCOM1->SPI.INTFLAG.bit.ERROR = 1; return; } if(interrupts & (1<<3)) { Serial.println("SPI SSL Interupt"); SERCOM1->SPI.INTFLAG.bit.SSL = 1; //clear slave select interrupt } if(interrupts & (1<<2)) { Serial.println("SPI Data Receive Complete Interrupt"); Serial.print("B4 RXC flag cleared:"); Serial.println(SERCOM1->SPI.INTFLAG.bit.RXC); // Reading the DATA should clear the flag while( SERCOM1->SPI.INTFLAG.bit.RXC != 0) { //data = SERCOM1->SPI.DATA.bit.DATA; //eat up junk = SERCOM1->SPI.DATA.reg; //Read data register } Serial.print("After RXC flag cleared:"); Serial.println(SERCOM1->SPI.INTFLAG.bit.RXC); // Below should have no affect according to docs //SERCOM1->SPI.INTFLAG.bit.RXC = 1; //clear receive complete interrupt } if(interrupts & (1<<1)) { Serial.println("SPI Data Transmit Complete Interrupt. SSH"); SERCOM1->SPI.INTFLAG.bit.TXC = 1; //clear receive complete interrupt } if(interrupts & (1<<0)) { Serial.println("SPI Data Register Empty Interrupt. Ready for new data to transmit"); SERCOM1->SPI.DATA.reg = 0x12; } Serial.print("DATA: "); Serial.println(data); //Serial.print("CTRLA: "); Serial.println(SERCOM1->SPI.CTRLA.reg); } void spiSlave_init() { //Configure SERCOM1 SPI PINS //PORTA.DIR.reg &= ~PORT_PA16; //Set PA16 as input (MOSI) //PORTA.DIR.reg &= ~PORT_PA17; //Set PA17 as input (SCK) //PORTA.DIR.reg &= ~PORT_PA18; //Set PA18 as input (SS) //PORTA.DIR.reg \|= PORT_PA19; //Set PA19 as output (MISO) /* PORTA.PINCFG[16].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORTA.PMUX[8].bit.PMUXE = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORTA.PINCFG[17].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORTA.PMUX[8].bit.PMUXO = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORTA.PINCFG[18].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORTA.PMUX[9].bit.PMUXE = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORTA.PINCFG[19].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORTA.PMUX[9].bit.PMUXO = 0x2; //SERCOM 1 is selected for peripherial use of this pad / PORT->Group[PORTA].PINCFG[16].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORT->Group[PORTA].PMUX[8].bit.PMUXE = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORT->Group[PORTA].PINCFG[17].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORT->Group[PORTA].PMUX[8].bit.PMUXO = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORT->Group[PORTA].PINCFG[18].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORT->Group[PORTA].PMUX[9].bit.PMUXE = 0x2; //SERCOM 1 is selected for peripherial use of this pad PORT->Group[PORTA].PINCFG[19].bit.PMUXEN = 0x1; //Enable Peripheral Multiplexing for SERCOM1 SPI PA18 Arduino PIN10 PORT->Group[PORTA].PMUX[9].bit.PMUXO = 0x2; //SERCOM 1 is selected for peripherial use of this pad //Disable SPI 1 SERCOM1->SPI.CTRLA.bit.ENABLE =0; while(SERCOM1->SPI.SYNCBUSY.bit.ENABLE); //Reset SPI 1 SERCOM1->SPI.CTRLA.bit.SWRST = 1; while(SERCOM1->SPI.CTRLA.bit.SWRST \|\| SERCOM1->SPI.SYNCBUSY.bit.SWRST); //Setting up NVIC NVIC_EnableIRQ(SERCOM1_IRQn); NVIC_SetPriority(SERCOM1_IRQn,2); //Setting Generic Clock Controller!!!! GCLK->CLKCTRL.reg = GCLK_CLKCTRL_ID(GCM_SERCOM1_CORE) \| //Generic Clock 0 GCLK_CLKCTRL_GEN_GCLK0 \| // Generic Clock Generator 0 is the source GCLK_CLKCTRL_CLKEN; // Enable Generic Clock Generator while(GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY); //Wait for synchronisation //Set up SPI Control A Register SERCOM1->SPI.CTRLA.bit.DORD = 0; //MSB first SERCOM1->SPI.CTRLA.bit.CPOL = 0; //SCK is low when idle, leading edge is rising edge SERCOM1->SPI.CTRLA.bit.CPHA = 0; //data sampled on leading sck edge and changed on a trailing sck edge SERCOM1->SPI.CTRLA.bit.FORM = 0x0; //Frame format = SPI SERCOM1->SPI.CTRLA.bit.DIPO = 0x0; //DATA PAD0 MOSI is used as input (slave mode) SERCOM1->SPI.CTRLA.bit.DOPO = 0x2; //DATA PAD3 MISO is used as output SERCOM1->SPI.CTRLA.bit.MODE = 0x2; //SPI in Slave mode SERCOM1->SPI.CTRLA.bit.IBON = 0x1; //Buffer Overflow notification SERCOM1->SPI.CTRLA.bit.RUNSTDBY = 1; //wake on receiver complete //Set up SPI control B register //SERCOM1->SPI.CTRLB.bit.RXEN = 0x1; //Enable Receiver SERCOM1->SPI.CTRLB.bit.SSDE = 0x1; //Slave Selecte Detection Enabled SERCOM1->SPI.CTRLB.bit.CHSIZE = 0; //character size 8 Bit //SERCOM1->SPI.CTRLB.bit.PLOADEN = 0x1; //Enable Preload Data Register //while (SERCOM1->SPI.SYNCBUSY.bit.CTRLB); //Set up SPI interrupts SERCOM1->SPI.INTENSET.bit.SSL = 0x1; //Enable Slave Select low interrupt SERCOM1->SPI.INTENSET.bit.RXC = 0x1; //Receive complete interrupt SERCOM1->SPI.INTENSET.bit.TXC = 0x1; //Transmit complete interrupt SERCOM1->SPI.INTENSET.bit.ERROR = 0x1; //Error interrupt SERCOM1->SPI.INTENSET.bit.DRE = 0x1; //Data Register Empty interrupt //init SPI CLK //SERCOM1->SPI.BAUD.reg = SERCOM_FREQ_REF / (24000000u)-1; //Enable SPI SERCOM1->SPI.CTRLA.bit.ENABLE = 1; while(SERCOM1->SPI.SYNCBUSY.bit.ENABLE); SERCOM1->SPI.CTRLB.bit.RXEN = 0x1; //Enable Receiver, this is done here due to errate issue while(SERCOM1->SPI.SYNCBUSY.bit.CTRLB); //wait until receiver is enabled } 0
2023-2-24 06:34:10　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 38 个回答。邀请回答 hgimtk 该类别下有 38 个回答。邀请回答新星之火12138 该类别下有 33 个回答。邀请回答 chm5 该类别下有 32 个回答。邀请回答 zyh34997 该类别下有 32 个回答。邀请回答就好国dd 该类别下有 32 个回答。邀请回答 zaichenxi 该类别下有 31 个回答。邀请回答 heks 该类别下有 31 个回答。邀请回答四川赵赵该类别下有 29 个回答。邀请回答 flowerddd 该类别下有 29 个回答。邀请回答 muwersddg 该类别下有 29 个回答。邀请回答星星公交站该类别下有 28 个回答。邀请回答 vinww特烦恼该类别下有 28 个回答。邀请回答 caosurround 该类别下有 28 个回答。邀请回答 723662364d 该类别下有 27 个回答。邀请回答 overheat 该类别下有 27 个回答。邀请回答 gvjhvbc 该类别下有 27 个回答。邀请回答安德森大该类别下有 27 个回答。邀请回答 xwgc888 该类别下有 27 个回答。邀请回答 h1654155143.8331 该类别下有 27 个回答。邀请回答举报 djelje 相关推荐 • ESP8266MOD和BME280的电源问题如何解决？ 272 • 请问ESP8266为什么无法加入AP？ 262 • 无法编程或闪存ESP8266怎么解决？ 319 • 请问从哪里获得ESP8266 RTOS SDK的SPI驱动程序？ 607 • 在Ubuntu上安装了Arduino IDE，无法为其添加ESP8266功能怎么解决？ 371 • 为什么无法为ESP8266编译示例草图? 238 • esp8266使用DDRB PORTB或DDRD PORTD的代码不起作用是为什么?如何解决？ 250 • Arduino IDE (1.6.8) 安装ESP8266开发板附件，无法编译新安装的原因？ 350 • 无法从串行监视器控制ESP8266怎么解决？ 270 • BLYNKESP8266编译错误的原因？如何解决？ 256