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9 years, 6 months ago.
GR-PEACH I2C not completely working
Hello GR-PEACH team,
I am reporting an issue with the GR-PEACH regarding I2C.
I2C works as long as you use the complex commands where a character buffer is required.
#define TESTADDRESS 0xd0 //typical for RTCs like DS1307, DS3232 ot M41T11 #define POINTER 0 //set up internal pointer to the i2c slave device's data data[0] = POINTER; wr_ack_ok = i2c.write(TESTADDRESS, &data[0], 1, true); rd_ack_ok = i2c.read((TESTADDRESS | 1), &data[0], 7, true);
However, using low level I2C commands (code below) does not work. In fact, I2C example above will stop working if the code below is executed. A power cycle is required in order for the above example to work again.
char reg0, reg1, reg2 = 0; i2c.start(); wr_ack_ok = i2c.write(TESTADDRESS); i2c.write(POINTER); i2c.stop(); i2c.start(); rd_ack_ok = i2c.write(TESTADDRESS | 1); reg0 = i2c.read(true); reg1 = i2c.read(true); reg2 = i2c.read(false); i2c.stop();
Regards,
...kevin