void setup() { Wire.begin(); //creates a Wire object
// set I/O pins to outputs Wire.beginTransmission(0x20); //begins talking to the slave device Wire.write(0x00); //selects the IODIRA register Wire.write(0x00); //this sets all port A pins to outputs Wire.endTransmission(); //stops talking to device Wire.beginTransmission(0x20);//begins talking again to slave device Wire.write(0x01); //selects the IODIRB register Wire.write(0x00); // sets all port B pins to outputs Wire.endTransmission(); //ends communication with slave device }
void loop() { Wire.beginTransmission(0x20); //starts talking to slave device Wire.write(0x12); //selects the GPIOA pins Wire.write(00000011); // turns on pins 0 and 1 of GPIOA Wire.endTransmission(); //ends communication with the device Wire.beginTransmission(0x20); //starts talking to slave device Wire.write(0x13); //selects the GPIOB pins Wire.write(00000001); //turns on pin 0 of GPIOA Wire.endTransmission();//ends communication with the device }
void setup() { Wire.begin(); //creates a Wire object
// set I/O pins to outputs Wire.beginTransmission(0x20); //begins talking to the slave device Wire.write(0x00); //selects the IODIRA register Wire.write(0x00); //this sets all port A pins to outputs Wire.endTransmission(); //stops talking to device Wire.beginTransmission(0x20);//begins talking again to slave device Wire.write(0x01); //selects the IODIRB register Wire.write(0x00); // sets all port B pins to outputs Wire.endTransmission(); //ends communication with slave device }
void loop() { Wire.beginTransmission(0x20); //starts talking to slave device Wire.write(0x12); //selects the GPIOA pins Wire.write(00000011); // turns on pins 0 and 1 of GPIOA Wire.endTransmission(); //ends communication with the device Wire.beginTransmission(0x20); //starts talking to slave device Wire.write(0x13); //selects the GPIOB pins Wire.write(00000001); //turns on pin 0 of GPIOA Wire.endTransmission();//ends communication with the device }
Some messages aren’t supposed to last forever. There are some Telegram groups and conversations where it’s best if messages are automatically deleted in a day or a week. Here’s how to auto-delete messages in any Telegram chat. You can enable the auto-delete feature on a per-chat basis. It works for both one-on-one conversations and group chats. Previously, you needed to use the Secret Chat feature to automatically delete messages after a set time. At the time of writing, you can choose to automatically delete messages after a day or a week. Telegram starts the timer once they are sent, not after they are read. This won’t affect the messages that were sent before enabling the feature.
The SSE was the first modern stock exchange to open in China, with trading commencing in 1990. It has now grown to become the largest stock exchange in Asia and the third-largest in the world by market capitalization, which stood at RMB 50.6 trillion (US$7.8 trillion) as of September 2021. Stocks (both A-shares and B-shares), bonds, funds, and derivatives are traded on the exchange. The SEE has two trading boards, the Main Board and the Science and Technology Innovation Board, the latter more commonly known as the STAR Market. The Main Board mainly hosts large, well-established Chinese companies and lists both A-shares and B-shares.
