![]() ![]() En bref, cette carte représente le niveau supérieur : vous pourrez faire des choses que vous ne pouvez pas réaliser avec une carte plus classique. r a r d u i n o s a d i s c l a i m s a l l o t h e r a w a. La carte Mega est donc plus puissante, permet une marge de manuvre beaucoup plus importante et des montages plus poussés qu’avec d’autres cartes Arduino. Currently, I am merging the work of several Arduino Diecimilas onto one Arduino Mega but I cant find any conclusive information about how the Mega Pinout corresponds to the higher port registers (PORTE, PORTF, etc). r e f e r e n c e u d e s i g n s a r e p r o v i d e d ' a s i s ' a n d ' w i t h u a l l t f a u l t s. They don't appear to be labled on the added pins next to AREF, so picking the wrong one on this attempt is 50/50. Hi there, My Arduino program uses port registers extensively (PORTB, PORTD, etc). Can any harm arise from accidentally swapping the SDA for the SCL? I'm thinking no, as its just a zero to 5 volt square wave on either. It all works so slick and easy like everything else with the Duemilanove, just not with the Mega 2560 R3.įor fun, I am going to try the other two SDA and SCL pins. ![]() I checked the output on the Mega's I2C pins with an oscilloscope, and there is certainly a 0 to 5v signal coming out of both SCL and SDA on the Mega. I've tried a variety of values of pull up resistors, and also no pull ups, and still get no I2C function on the Mega. I have another Mega on order, and perhaps it will be the same, or it might work. There are pin mappings to Atmega8 and Atmega 168/328 as well. Below is the pin mapping for the Atmega2560. When I run any of 3 I2C scanners on my Mega, nothing shows up for the I2C devices. A diagram showing the correspondence between the pins on an Arduino board and those of the ATmega2560 microcontroller. The HX711 communicates with the microcontroller using two-wire interface (Clock and Data). You wire the load cell wires on one side, and the microcontroller on the other side. I now know that the devices, a compass and lcd work perfectly with my Duemilanove. The HX711 amplifier is a breakout board that allows you to easily read load cells to measure weight. I've been struggling with an otherwise excellent Mega 2560 R3, that for some reason doesn't communicate with any I2C device. ![]()
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