PaulS:
Post all of your code for one side. Start with the sender. Explain what happens when that code is executed, and what does not happen.
This is the code I'm using for the sender:
#include <SD.h>
File myFile;
#include "NRF24L01.h"
//***************************************************
#define TX_ADR_WIDTH 5 // 5 unsigned chars TX(RX) address width
#define TX_PLOAD_WIDTH 32 // 32 unsigned chars TX payload
unsigned char TX_ADDRESS[TX_ADR_WIDTH] =
{
0x34,0x43,0x10,0x10,0x01
}; // Define a static TX address
unsigned char rx_buf[TX_PLOAD_WIDTH] = {0}; // initialize value
unsigned char tx_buf[TX_PLOAD_WIDTH] = {0};
//***************************************************
void setup()
{
pinMode(CE, OUTPUT);
pinMode(SCK, OUTPUT);
pinMode(CSN, OUTPUT);
pinMode(MOSI, OUTPUT);
pinMode(MISO, INPUT);
pinMode(IRQ, INPUT);
pinMode(CSN2, OUTPUT);
pinMode(10, OUTPUT); //SD code specifies pin 10 must be an OUTPUT
// attachInterrupt(1, _ISR, LOW);// interrupt enable
Serial.begin(9600);
//If this function is commented, then RF works.
//If used, then RF doesn't works.
SD_Init(); // Set SD memory
init_io(); // Initialize IO port
unsigned char status=SPI_Read(STATUS);
Serial.print("status = ");
Serial.println(status,HEX); // There is read the mode’s status register, the default value should be ‘E’
Serial.println("*******************TX_Mode Start****************************");
TX_Mode(); // set TX mode
}
void loop()
{
int k = 0;
for(;;)
{
for(int i=0; i<32; i++)
{
tx_buf[i] = k++;
Serial.println(tx_buf[i], HEX);
}
unsigned char status = SPI_Read(STATUS); // read register STATUS's value
if(status&TX_DS) // if receive data ready (TX_DS) interrupt
{
SPI_RW_Reg(FLUSH_TX,0);
SPI_Write_Buf(WR_TX_PLOAD,tx_buf,TX_PLOAD_WIDTH); // write playload to TX_FIFO
}
if(status&MAX_RT) // if receive data ready (MAX_RT) interrupt, this is retransmit than SETUP_RETR
{
SPI_RW_Reg(FLUSH_TX,0);
SPI_Write_Buf(WR_TX_PLOAD,tx_buf,TX_PLOAD_WIDTH); // disable standy-mode
}
SPI_RW_Reg(WRITE_REG+STATUS,status); // clear RX_DR or TX_DS or MAX_RT interrupt flag
delay(500);
}
}
//**************************************************
// Function: init_io();
// Description:
// flash led one time,chip enable(ready to TX or RX Mode),
// Spi disable,Spi clock line init high
//**************************************************
void init_io(void)
{
digitalWrite(IRQ, 0);
digitalWrite(CE, 0); // chip enable
digitalWrite(CSN, 1); // Spi disable
//For SD init????
digitalWrite(CSN2, 1); // Spi disable
}
/**************************************************
* Function: SPI_RW();
*
* Description:
* Writes one unsigned char to nRF24L01, and return the unsigned char read
* from nRF24L01 during write, according to SPI protocol
**************************************************/
unsigned char SPI_RW(unsigned char Byte)
{
unsigned char i;
for(i=0;i<8;i++) // output 8-bit
{
if(Byte&0x80)
{
digitalWrite(MOSI, 1);
}
else
{
digitalWrite(MOSI, 0);
}
digitalWrite(SCK, 1);
Byte <<= 1; // shift next bit into MSB..
if(digitalRead(MISO) == 1)
{
Byte |= 1; // capture current MISO bit
}
digitalWrite(SCK, 0);
}
return(Byte); // return read unsigned char
}
/**************************************************/
/**************************************************
* Function: SPI_RW_Reg();
*
* Description:
* Writes value 'value' to register 'reg'
/**************************************************/
unsigned char SPI_RW_Reg(unsigned char reg, unsigned char value)
{
unsigned char status;
digitalWrite(CSN, 0); // CSN low, init SPI transaction
status = SPI_RW(reg); // select register
SPI_RW(value); // ..and write value to it..
digitalWrite(CSN, 1); // CSN high again
return(status); // return nRF24L01 status unsigned char
}
/**************************************************/
/**************************************************
* Function: SPI_Read();
*
* Description:
* Read one unsigned char from nRF24L01 register, 'reg'
/**************************************************/
unsigned char SPI_Read(unsigned char reg)
{
unsigned char reg_val;
digitalWrite(CSN, 0); // CSN low, initialize SPI communication...
SPI_RW(reg); // Select register to read from..
reg_val = SPI_RW(0); // ..then read register value
digitalWrite(CSN, 1); // CSN high, terminate SPI communication
return(reg_val); // return register value
}
/**************************************************/
/**************************************************
* Function: SPI_Read_Buf();
*
* Description:
* Reads 'unsigned chars' #of unsigned chars from register 'reg'
* Typically used to read RX payload, Rx/Tx address
/**************************************************/
unsigned char SPI_Read_Buf(unsigned char reg, unsigned char *pBuf, unsigned char bytes)
{
unsigned char status,i;
digitalWrite(CSN, 0); // Set CSN low, init SPI tranaction
status = SPI_RW(reg); // Select register to write to and read status unsigned char
for(i=0;i<bytes;i++)
{
pBuf[i] = SPI_RW(0); // Perform SPI_RW to read unsigned char from nRF24L01
}
digitalWrite(CSN, 1); // Set CSN high again
return(status); // return nRF24L01 status unsigned char
}
/**************************************************/
/**************************************************
* Function: SPI_Write_Buf();
*
* Description:
* Writes contents of buffer '*pBuf' to nRF24L01
* Typically used to write TX payload, Rx/Tx address
/**************************************************/
unsigned char SPI_Write_Buf(unsigned char reg, unsigned char *pBuf, unsigned char bytes)
{
unsigned char status,i;
digitalWrite(CSN, 0); // Set CSN low, init SPI tranaction
status = SPI_RW(reg); // Select register to write to and read status unsigned char
for(i=0;i<bytes; i++) // then write all unsigned char in buffer(*pBuf)
{
SPI_RW(*pBuf++);
}
digitalWrite(CSN, 1); // Set CSN high again
return(status); // return nRF24L01 status unsigned char
}
/**************************************************/
/**************************************************
* Function: TX_Mode();
*
* Description:
* This function initializes one nRF24L01 device to
* TX mode, set TX address, set RX address for auto.ack,
* fill TX payload, select RF channel, datarate & TX pwr.
* PWR_UP is set, CRC(2 unsigned chars) is enabled, & PRIM:TX.
*
* ToDo: One high pulse(>10us) on CE will now send this
* packet and expext an acknowledgment from the RX device.
**************************************************/
void TX_Mode(void)
{
digitalWrite(CE, 0);
SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // Writes TX_Address to nRF24L01
SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // RX_Addr0 same as TX_Adr for Auto.Ack
SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans...
SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40
SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR
SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 unsigned chars) & Prim:TX. MAX_RT & TX_DS enabled..
SPI_Write_Buf(WR_TX_PLOAD,tx_buf,TX_PLOAD_WIDTH);
digitalWrite(CE, 1);
}
void SD_Init(void)
{
//SD code
//If I commemnt this then the transcevier works, if not, then the transceiver doesn't works.
//There is a code problem.
Serial.print("Initializing SD card...");
if (!SD.begin(7)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
These are the code objectives:
- Initialize SD
- Initialize RF
- Send a fixed payload (from 0x00 to 0x0F)
The system is not able to send the payload (I am noticed of that because I have a receiver prepared and for sure, the receivers works properly, because I have tested the code before for the receiver (sending a fix payload with a transmiter without an SD).
