Cansat
/
RFM69_LowPowerLab
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #26 from damadmai/ctlbyte 

Save program space by calculating CTLbyte instead of fixed literal
This commit is contained in:
Felix Rusu 2015-02-10 09:29:11 -05:00
parent 48da5357e0 c9440c9249
commit 74fb811e64
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
RFM69.cpp
View File

@ -264,19 +264,20 @@ void RFM69::sendFrame(uint8_t toAddress, const void* buffer, uint8_t bufferSize,
writeReg(REG_DIOMAPPING1, RF_DIOMAPPING1_DIO0_00); // DIO0 is "Packet Sent"
if (bufferSize > RF69_MAX_DATA_LEN) bufferSize = RF69_MAX_DATA_LEN;
// control byte
uint8_t CTLbyte = 0x00;
if (sendACK)
CTLbyte = 0x80;
else if (requestACK)
CTLbyte = 0x40;
// write to FIFO
select();
SPI.transfer(REG_FIFO | 0x80);
SPI.transfer(bufferSize + 3);
SPI.transfer(toAddress);
SPI.transfer(_address);
// control byte
if (sendACK)
SPI.transfer(0x80);
else if (requestACK)
SPI.transfer(0x40);
else SPI.transfer(0x00);
SPI.transfer(CTLbyte);
for (uint8_t i = 0; i < bufferSize; i++)
SPI.transfer(((uint8_t*) buffer)[i]);