gomaomao/DIY-Multiprotocol-TX-Module
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Split checksum into MSB and LSB fields to avoid endian issue

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This commit is contained in:
Dennis 2017-04-19 18:25:44 -04:00
parent f1089ad268
commit 255353a054
1 changed files with 5 additions and 3 deletions
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8
Multiprotocol/CABELL_nrf224l01.ino
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@ -65,7 +65,6 @@ typedef struct {
* mask 0x80>>7 Unused by RX. Contains max power override flag for Multiprotocol T module * mask 0x80>>7 Unused by RX. Contains max power override flag for Multiprotocol T module
*/ */
uint8_t modelNum; uint8_t modelNum;
uint16_t checkSum;
uint8_t payloadValue [CABELL_PAYLOAD_BYTES] = {0}; //12 bits per channel value, unsigned uint8_t payloadValue [CABELL_PAYLOAD_BYTES] = {0}; //12 bits per channel value, unsigned
} CABELL_RxTxPacket_t; } CABELL_RxTxPacket_t;
@ -180,7 +179,7 @@ static void __attribute__((unused)) CABELL_send_packet(uint8_t bindMode)
} }
TxPacket.reserved = 0; TxPacket.reserved = 0;
TxPacket.modelNum = RX_num; TxPacket.modelNum = RX_num;
TxPacket.checkSum = TxPacket.modelNum + TxPacket.option + TxPacket.RxMode + TxPacket.reserved; // Start Calculate checksum uint16_t checkSum = TxPacket.modelNum + TxPacket.option + TxPacket.RxMode + TxPacket.reserved; // Start Calculate checksum
int adjusted_x; int adjusted_x;
int payloadIndex = 0; int payloadIndex = 0;
@ -221,9 +220,12 @@ static void __attribute__((unused)) CABELL_send_packet(uint8_t bindMode)
} }
for(int x = 0; x < maxPayloadValueIndex ; x++) { for(int x = 0; x < maxPayloadValueIndex ; x++) {
TxPacket.checkSum = TxPacket.checkSum + TxPacket.payloadValue[x]; // Finish Calculate checksum checkSum += TxPacket.payloadValue[x]; // Finish Calculate checksum
} }
TxPacket.checkSum_MSB = checkSum >> 8;
TxPacket.checkSum_LSB = checkSum & 0x00FF;
// Set channel for next transmission // Set channel for next transmission
rf_ch_num = CABELL_getNextChannel (hopping_frequency,CABELL_RADIO_CHANNELS, rf_ch_num); rf_ch_num = CABELL_getNextChannel (hopping_frequency,CABELL_RADIO_CHANNELS, rf_ch_num);
NRF24L01_WriteReg(NRF24L01_05_RF_CH,rf_ch_num); NRF24L01_WriteReg(NRF24L01_05_RF_CH,rf_ch_num);