Malcolm McCulloch
This is a work in progress for an NRF2401P
Dependents: NRF_receiver sender locker4 Weather_Station_Ofiicial ... more
About
This is a simple library to drive the nRF24l01+.
Hardware
This uses the commonly available breakout. The connections are shown below 
Software
Use case: For a simple transmitter
tx code snipet
#include "NRF2401P.h"
int main() {
*
* long long addr1=0xAB00CD; // setup address - any 5 byte number - same as RX
* int channel =0x12; // [0-126] setup channel, must be same as RX
* bool txOK;
* char msg[32];
* char ackData[32];
* char len;
*
* // Setup
* NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
* nrf1.quickTxSetup(channel, addr1); // sets nrf24l01+ as transmitter
*
* // transmit
* strcpy (msg, "Hello");
* txOK= nrf1.transmitData(msg,strlen(msg));
*
* // read ack data if available
* if (nrf1.isAckData()) {
* len= nrf1.getRxData(ackData); // len is number of bytes in ackData
* }
*}
Use case: For a simple receiver
rx code snipet
#include "NRF2401P.h"
*int main(){
*
* long long addr1=0xAB00CD; // setup address - any 5 byte number - same as TX
* int channel =0x12; // [0-126] setup channel, must be same as TX
* bool txOK;
* char msg[32];
* char ackData[32];
* char len;
*
* // Setup
* NRF2401P nrf1(PTD6,PTD7, PTD5,PTD4, PTC12); //mosi, miso, sclk, csn, ce)
* nrf1.quickRxSetup(channel, addr1); // sets nrf24l01+ as receiver, using pipe 1
*
* // set ack data
* sprintf(ackData,"Ack data");
* nrf1.acknowledgeData(ackData, strlen(ackData),1); // ack for pipe 1
*
* // receive
* while (! nrf1.isRxData()); // note this blocks until RX data
* len= nrf1.getRxData(msg); // gets the message, len is length of msg
*
*}
Diff: NRF2401P.cpp
- Revision:
- 17:b132fc1a27d2
- Parent:
- 16:a9b83d2b6915
- Child:
- 18:220df99d2d41
--- a/NRF2401P.cpp Thu Jan 28 14:37:32 2016 +0000
+++ b/NRF2401P.cpp Sun Feb 07 22:34:47 2016 +0000
@@ -75,7 +75,7 @@
void NRF2401P::start()
{
writeReg(CONFIG, 0x0c); // set 16 bit crc
- setTxRetry(0x01, 0x0f); // 500 uS, 15 retries
+ setTxRetry(0x05, 0x0f); // 500 uS, 15 retries
setRadio(0, 0x03); // 1MB/S 0dB
setDynamicPayload();
setChannel(76); // should be clear?
@@ -472,11 +472,12 @@
char NRF2401P::setTxAddress( long long address )
{
char buff[ 5 ];
- buff[ 0 ] = address & 0xff;
- buff[ 1 ] = ( address >> 8 ) & 0xFF;
- buff[ 2 ] = ( address >> 16 ) & 0xFF;
- buff[ 3 ] = ( address >> 24 ) & 0xFF;
- buff[ 4 ] = ( address >> 32 ) & 0xFF;
+ char width = addressWidth;
+
+ for (char w=0; w<width;w++){
+ char ww = width -w-1; // Reverse bytes
+ buff[w] = ( address >> (8*ww )) &0xFF;
+ }
return setTxAddress( buff );
}
@@ -522,11 +523,14 @@
char NRF2401P::setRxAddress( long long address, char pipe )
{
char buff[ 5 ];
- buff[ 0 ] = address & 0xff;
- buff[ 1 ] = ( address >> 8 ) & 0xFF;
- buff[ 2 ] = ( address >> 16 ) & 0xFF;
- buff[ 3 ] = ( address >> 24 ) & 0xFF;
- buff[ 4 ] = ( address >> 32 ) & 0xFF;
+ char width = addressWidth;
+ if (pipe>1){
+ width = 1;
+ }
+ for (char w=0; w<width;w++){
+ char ww = width -w-1; // Reverse bytes
+ buff[w] = ( address >> (8*ww ) )&0xFF;
+ }
return setRxAddress( buff, pipe );
}
@@ -628,6 +632,36 @@
}
/**
+* Sets PWR_UP = 0;
+* return 0 on success
+*/
+char NRF2401P::setPwrDown()
+{
+ char data;
+ char bit;
+ ce=1;
+ readReg(CONFIG, &data);
+ if (!((data>>1) &0x01)) {
+ return true; // Already powered up
+ };
+ data &= (0xFD); // clear bit 2
+ writeReg(CONFIG, data);
+ // check
+ readReg(CONFIG, &data);
+ bit = ( data >> 1 ) & 1;
+
+ wait(0.005); // wait 5ms
+ if(debug) {
+ sprintf(logMsg, "Set PWR_UP to %x", bit);
+ log(logMsg);
+ }
+ if (bit == 0) {
+ return 0;
+ } else {
+ return 1;
+ }
+}
+/**
* Sets PWR_UP = 1;
* return 0 on success
*/
@@ -657,7 +691,6 @@
return 1;
}
}
-
/**
* Sets PRIM_RX = 0;
*/
@@ -734,9 +767,24 @@
printf("\r\n");
}
}
-
+/*
+* Prints in reverse order for addresses
+*/
+void NRF2401P::printRegR(char* name, char address, char width, bool newline)
+{
+ char data[width];
+ readReg(address, data, width);
+ printf("%s = 0x", name);
+ for (int i=0; i<width; i++) {
+ printf("%02x", data[i]);
+ }
+ if (newline) {
+ printf("\r\n");
+ }
+}
void NRF2401P::printDetails() {
status = checkStatus();
+ char w=1;
printf("STATUS = 0x%02x RX_DR=%x TX_DS=%x MAX_RT=%x RX_P_NO=%x TX_FULL=%x\r\n", status,
(status & (1<<MASK_RX_DR))?1:0,
(status & (1<<MASK_TX_DS))?1:0,
@@ -744,13 +792,13 @@
(status >> RX_P_NO) & 7,
(status & (1<<TX_FULL))?1:0 );
- printReg("RX_ADDR_P0", RX_ADDR_P0, addressWidth);
- printReg("RX_ADDR_P1", RX_ADDR_P1, addressWidth);
- printReg("RX_ADDR_P2", RX_ADDR_P2, addressWidth);
- printReg("RX_ADDR_P3", RX_ADDR_P3, addressWidth);
- printReg("RX_ADDR_P4", RX_ADDR_P4, addressWidth);
- printReg("RX_ADDR_P5", RX_ADDR_P5, addressWidth);
- printReg("TX_ADDR", TX_ADDR, addressWidth);
+ printRegR("RX_ADDR_P0", RX_ADDR_P0, addressWidth);
+ printRegR("RX_ADDR_P1", RX_ADDR_P1, addressWidth);
+ printRegR("RX_ADDR_P2", RX_ADDR_P2, w);
+ printRegR("RX_ADDR_P3", RX_ADDR_P3, w);
+ printRegR("RX_ADDR_P4", RX_ADDR_P4, w);
+ printRegR("RX_ADDR_P5", RX_ADDR_P5, w);
+ printRegR("TX_ADDR", TX_ADDR, addressWidth);
printReg("RX_PW_P0", RX_PW_P0, false); // false for no newline, save some space
printReg(" RX_PW_P1", RX_PW_P1, false);
@@ -759,6 +807,8 @@
printReg(" RX_PW_P4", RX_PW_P4, false);
printReg(" RX_PW_P5", RX_PW_P5);
+
+ printReg("SETUP_RETR", SETUP_RETR);
printReg("EN_AA", EN_AA);
printReg("EN_RXADDR", EN_RXADDR);
printReg("RF_CH", RF_CH);
