So if I want just read 2 bytes using I2C then I have to do something
like this?
uint8_t rbuffer[2]; // read buffer
uint16_t seconds; // global seconds
rbuffer[0] = rbuffer[1] = 0;
call I2CPacket.read(I2C_START | I2C_STOP, 0x51, 2, rbuffer)
async event void I2CPacket.readDone(error_t error, uint16_t addr,
uint8_t length, uint8_t* data) {
uint16_t val;
val = data[0]; // data[1] not used although 2 bytes read
seconds = val;
}
Does I2CPacket.readDone actually returns the same uint8_t rbuffer[2]
as uint8_t* data pointer?
Do I have to call all I2CPacket.read and I2CPacket.write functions
from event void Resource.granted()?
Andres Vahter
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