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RF24: Minor power optimization (#1069)

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tekka
2018-04-04 20:48:36 +02:00
committed by Mikael Falkvidd
parent 3c0b2727a5
commit 2994d83e53
1 changed files with 2 additions and 1 deletions
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drivers/RF24/RF24.cpp
+2 -1
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@@ -302,13 +302,14 @@ LOCAL bool RF24_sendMessage(const uint8_t recipient, const void *buf, const uint
RF24_CMD_WRITE_TX_PAYLOAD, (uint8_t *)buf, len, false ); RF24_CMD_WRITE_TX_PAYLOAD, (uint8_t *)buf, len, false );
// go, TX starts after ~10us, CE high also enables PA+LNA on supported HW // go, TX starts after ~10us, CE high also enables PA+LNA on supported HW
RF24_ce(HIGH); RF24_ce(HIGH);
delayMicroseconds(10); // datasheet: Pulse CE at least 10us
RF24_ce(LOW);
// timeout counter to detect HW issues // timeout counter to detect HW issues
uint16_t timeout = 0xFFFF; uint16_t timeout = 0xFFFF;
do { do {
RF24_status = RF24_getStatus(); RF24_status = RF24_getStatus();
} while (!(RF24_status & ( _BV(RF24_MAX_RT) | _BV(RF24_TX_DS) )) && timeout--); } while (!(RF24_status & ( _BV(RF24_MAX_RT) | _BV(RF24_TX_DS) )) && timeout--);
// timeout value after successful TX on 16Mhz AVR ~ 65500, i.e. msg is transmitted after ~36 loop cycles // timeout value after successful TX on 16Mhz AVR ~ 65500, i.e. msg is transmitted after ~36 loop cycles
RF24_ce(LOW);
// reset interrupts // reset interrupts
RF24_setStatus(_BV(RF24_TX_DS) | _BV(RF24_MAX_RT) ); RF24_setStatus(_BV(RF24_TX_DS) | _BV(RF24_MAX_RT) );
// Max retries exceeded // Max retries exceeded