![]() The errors in the pin definitions with switching them and the constructor call here actually canceled out previously in your example. The SPIClass constructor takes SPIClass(uint8_t mosi, uint8_t miso, uint8_t sclk, uint8_t ssel = (uint8_t)NC) Īka, MOSI + MISO, not MOSI + MISO. ![]() I have included a detailed specification, pin diagram, and code for SPI communication between two Arduino boards. The first and most common method is with the hardware SPI controller. Serial.println("SPI(2) data transfer end") This article will give you all the necessary information about the Serial Peripheral Interface (SPI) communication protocol of the AVR microcontroller used in Arduino UNO and Arduino Mega board. There are two general ways to implement SPI communication on the Arduino or any MCU. Even if you define (PINWIRESDA) to another I2C1 pair or 12C0 pair, it will allow those re-definitions during compilation and Serial printing, but still won't illuminate your SSD1306. Pi Pico will always default to using GP6 and GP7 (I2C1). Serial.println("SPI(2) data transfer begin") One can use Serial.println (SDA) and it will compile for the Arduino Nano, but not for the Pi Pico. Serial.println("SPI(1) data transfer end") Serial.println("SPI(1) data transfer begin") Serial.println("Sending data Completed") Any idea what I am doing wrong? I am guessing it fails at the data transfer but I don t really understand why. I have tried running your code with the following change at the end of the loop. It seems now that the begin and end transactions are successful but when I try to transfer data to the system its crashes. I have updated to the latest core version (There used to be an issue with compilation at version 6.1).Īnd switched the MOSI MISO which were indeed wrong. Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H. Serial.println("SPI(2) transaction done") Serial.println("SPI(1) transaction done") SPIClass SPI_2(P_MISO2, P_MOSI2, P_SCK2) If I test the following code on my bluepill #include SPIClass SPI_2(P_MISO2,P_MOSI2,P_SCK2,P_CS_UP) Īlso you you shouldn’t give the instantiated SPI object the chip-select pin, because otherwise it’ll assume thaht’s a hardware NSS pin. SPI_2.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE3)) īuild_flags = -DDALEK_1_3 -O3 COMMENT THIS FOR MANUAL FLIGHT ON DALEK 1_3 SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE3)) SPIClass SPI_2(P_MISO2,P_MOSI2,P_SCK2,P_CS_UP) SPI.setMISO(P_MISO) The board freezes when I try to begin the 2nd SPI Serial.Sure thing, thank you for taking the time. Serial.println("Previous value of registers: ") Serial.println("Starting motor at 500.") ![]() Serial.println(ReadRegister16(RegStatus_1) & 0xFFFFul, BIN) Serial.println(ReadRegister16(RegControl_2) & 0xFFFFul, BIN) Serial.println(ReadRegister16(RegControl_1) & 0xFFFFul, BIN) Void WriteRegister16(uint8_t Address, uint16_t Data) #include Ĭonst int RegControl_1 = 0x1A // Control 3 registerĬonst int RegControl_2 = 0x1B // Control 2 registerĬonst int RegStatus_1 = 0x1C // Status register I forgot you need to set Bit 7 in the address byte when you want to Write a register. As if data is not being delivered to registers and we are just reading the pre-stored values. I changed c11,c12,c21,c22 values to random numbers but still the serial monitor shows the same output. Bn c th kim sot 1 hoc nhiu thit b s dng SPI. i vi Arduino Mega MISO l 50, MOSI l 51, SCK l 52 v SS thng l 53. Motor doesn't start and serial monitor output is still unchanged. i vi Arduino Uno cc chn giao tip SPI Ln lt l SS-10 MOSI-11 MISO-12 SCK-13. I even tried following just in case: digitalWrite(CS, LOW) To verify what was sent to registers, I added the following additional snippet (after first transfer) to read and print it later: digitalWrite(CS, LOW) įollowing was serial monitor output text: 23:23:39.926 -> 11000000 I tried both of the approaches you suggested.
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