![]() ![]() When you do a pinMode (A8, OUTPUT), the pin that is set is 89/8 on the left side. (The whole point of using the ICSP connector for SPI shields like the Ethernet Shield is that they run SPI on all of (Uno, MEGA, Due.) Older shields (older versions of of the ethernet shield, even) connected up D11.13 but still used the SPI peripheral, and that wasnt where SPI WAS on the MEGA. Along the bottom edge, pin 53 is also shown as A8. put your main code here, to run repeatedly:Īnd here's the result using my 2560. On the mega, along the left side, port K (PK0) is shown variously as pin 8, pin 89, PK0, A8, and ADC8. put your setup code here, to run once:īyte inputArray // How many are there? Check the data sheet. This example fades 12 LEDs up and the down, one by one, on an Arduino Mega board, taking advantage of the increased number of PWM enabled digital pins of this board. #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit)) #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit)) (there are 8 speedsettings and faster probably results in less accurate readings) // needed to switch to adc-fast mode later ![]() be read at different speeds, I included normal (slowest) and fastest way. inverselogic: used to invert the sense of incoming bits (the default is normal logic).If set, SoftwareSerial treats a LOW (0v on the pin, normally) on the RX pin as a 1-bit (the idle state) and a HIGH (5V on the pin, normally) as a 0-bit. The Arduino Mega 2560 is a microcontroller board based on the ATmega2560 (datasheet). txPin: the pin on which to transmit serial data. Another way - you can generate PWM output by software, but it depends from required frequency and digital resolution. See Serial - Arduino Reference for details. PWM signal is produced by hardware timer, so only pins that are timer outputs can be used as PWM pins. The Mega has 3 more serial interfaces, Serial1, Serial2 and Serial3 which do not interfere with the USB interface, each with their own pins. With direct port manipulation, quite fast: byte inputArray // How many are there? Check the data sheet.ĭon't put them either of them in a loop, that just adds around 12uS per read.Īpparently the 2560 doesn't have a PORTI and PORTL is the last port.Īnyway, this is the code I used. rxPin: the pin on which to receive serial data. The pins marked Rx and Tx belong to the Serial interface but are shared with the USB interface which is used to upload code to the Mega, hence your problem.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |