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Software SPI problems on PIC16LF1455

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tienchuan

Joined: 25 Aug 2009
Posts: 175

Software SPI problems on PIC16LF1455

Posted: Thu Aug 13, 2015 4:44 am

Hi
I'm doing with NRF24L01+ with PIC16LF1455, using CCSC ver5.044 compiler.
In this project, I'm using software spi to connect with this RF module.
But when I check the signal by oscilloscope on pins such as: Mosi, Miso, Clk, EN, CSN, IRQ don't change.
So that I think have a problem with this spi connection.
Here is my config code:

Code:

#use delay(internal=16000000)
#USE SPI( FORCE_SW, MASTER, DI=PIN_C2, DO=PIN_C1, CLK=PIN_C0, BAUD=1000000, MODE=0, BITS=8, MSB_FIRST, STREAM=STREAM_SPI)

#define SPI_MISO PIN_C2 //RC2,RP13; SPI(Usar por hardware)
#define SPI_MOSI PIN_C1 //RC7,RP18; SPI(Usar por hardware)
#define SPI_CLK PIN_C0 //RB0,RP3; SPI(Usar por hardware)

//Driver nRF24L01P.C
#define RF24_IRQ PIN_C3 //RC5,RP16; interrupt nRF24L01+
#define RF24_CS PIN_A1 //RB1,RP4; chipselect nRF24L01+
#define RF24_CE PIN_A0 //RB2,RP5; chipEnable nRF24L01+
//!#define RF24_PERFORMANCE_MODE //performance mode ON

#define RF24_SPI_DISABLE_WARNING
#define RF24_SPI STREAM_SPI

#include "nRF24L01P.c"

And main program

Code:

void main(void)
{
delay_ms(100);
setup_oscillator(OSC_16MHZ | OSC_INTRC);
delay_ms(100);

set_tris_a(0);
set_tris_c(0x12);
setup_comparator(NC_NC_NC_NC);
setup_vref(VREF_OFF);
setup_dac(DAC_OFF);

setup_pwm1(PWM_DISABLED);
setup_pwm2(PWM_DISABLED);
setup_adc(ADC_OFF);

RF24_initPorts();
RF24_default_config();
RF24_TX_SET(); //Transmitter on
output_high(PIN_C4);

for(;;)
{

output_toggle(PIN_c4);
RF24_TX_putbuffer(false,1, 1);
while(RF24_IRQ_state()==false);
RF24_STATUS_clr_IRQs(IRQ_ALL);
RF24_driver_use_example_TXdata_simple();
delay_ms(500);
}

}

Pls help me to fix it, if it can't, I'll change code to PIC16F887 to test it. Thanks you
_________________
Begin Begin Begin !!!

Ttelmah

Joined: 11 Mar 2010
Posts: 19539


Posted: Thu Aug 13, 2015 7:00 am

You need to understand a fundamental thing about software/hardware SPI. There are two ways of configuring SPI in CCS. #USE SPI - which supports software _or_ hardware SPI, and must use spi_xfer to actually send the bytes or setup_spi - which only supports _hardware_ SPI, and uses spi_read/spi_write to send the bytes. The driver you have is written to use hardware SPI. It's not terribly hard to adapt. I'd suggest you get rid of the SPI #defines, remove all the spi configurations in the driver, and then using search and replace, replace all spi_read and write commands with the spi_xfer commands. Most already are, but he uses spi_read in one place, because of a bug in the early spi_xfer implementation. Currently the driver will be trying to configure hardware SPI on your software pins, which won't work.

tienchuan

Joined: 25 Aug 2009
Posts: 175

Posted: Thu Aug 13, 2015 7:41 am

Thanks for your support:)
About this driver, I'm using of nRF24L01+ full driver by Eduardo Guilherme Brandt in this forum.
As you told, in my program is using software spi, and I checked all read/write command are using spi_xfer() function
Can you check my driver is using:

Code:

/*
nRF24L01+
Single Chip 2.4GHz Transceiver Driver

Arquivo : nRF24L01P.C
Programador : Eduardo Guilherme Brandt
Criação : 17/11/2011 ( V 1.0 )
Modificado : 02/02/2012
Contato : [email protected]

Histórico : Versão 1.0 - 17/11/2011
Revision 1.1 - 29/01/2013

Functions :
See nRF24_commandList.c //Do not include this file. It´s just for reference.

Further information:
Ps: *Define SPI pins(RF24_CS, SPI_MISO, SPI_MOSI, SPI_CLK)
and control pins(RF24_CE, RF24_IRQ) for nRF24L01+
*Define SPI hardware controller stream RF24_SPI, too.
*SPI must be configured for more than 2Mbps.
*Software SPI can be too slow for. It can lead to a
poor system performance if slower than 4Mbps**

REQUIRES:
CCS PICC 4.124+,
uC with SPI
#device PASS_STRINGS=IN_RAM directive
spi_xfer(RF24_SPI, data, bits) //It has bugs in V4.124(not return read value). Some tricks was made.

Command-set:
see nRF24L01.h header file
ps: For more details, see nRF24L01+ datasheet.

Config example: See in RF24_default_config() function

Revision 1.1: The line below is a way of putting things work with hardware SPI in some CCS C compiller versions with some uCs. For example, with PIC16F876A hardware SPI it was not necessary. With software SPI it is never necessary. **You must comment(disable) every line with the code spi_read2() as the line below** in case the driver not work.

Code:
//rv = spi_read2(); //It´s necessary due to spi_xfer read bug

Eduardo Guilherme Brandt 17/11/2011 */
//////////////////////////////////////////////////////////////////////////////////////////
//
//
#ifndef RF24_CS
#ERROR pino RF24_CS nao definido
#endif
#ifndef RF24_CE
#ERROR pino RF24_CE nao definido
#endif
#ifndef RF24_IRQ
#ERROR pino RF24_IRQ nao definido
#endif
#ifndef SPI_MISO
#ERROR pino SPI_MISO nao definido
#endif
#ifndef SPI_MOSI
#ERROR pino SPI_MOSI nao definido
#endif
#ifndef SPI_CLK
#ERROR pino SPI_CLK nao definido
#endif
#ifdef RF24_USE_DMA //nRF24 uses SPI DMA for multiple byte transfers
#warning Please, check if "spi_dma.c" is included
#endif
/*#ifdef RF24_PERFORMANCE_MODE //performance mode ON
#warning RF24 in performance mode. Not all call functions parameters checks are make.
#endif*/
#ifndef RF24_SPI_DISABLE_WARNING
#warning Initialize RF24_SPI stream for SPI communication with nRF24L01, as below:
#warning #USE SPI(SPI2, MASTER, BAUD=1000000, MODE=0, BITS=8, MSB_FIRST, STREAM=RF24_SPI) //this will set SPI in 4MHz(maximum for 16MHz Xtal. #Use SPI is a little buggy)
#warning At V4.124 compiler version, SPI must be SPI2, due to CCS compiler bug
#warning #define RF24_SPI_DISABLE_WARNING for disabling nRF24 SPI warning message.
#endif
#ifndef RF24_PWUPDELAY
#define RF24_PWUPDELAY() delay_ms(2) //Delay power on nRF24L01+
#endif
#ifndef RF24_CSDELAY
#define RF24_CSDELAY() delay_us(10) //em us
#endif
//
//
//
#include <nRF24L01P.h> //HEADER FILE
//
//
//
/*****************************************************************************************
******************************************************************************************
*************************SPI handshake and I/O commands***********************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
*************************SPI handshake and I/O commands***********************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
*************************SPI handshake and I/O commands***********************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
* DEFINED MACROS
* ex:
* RF24_select(); //Controls bit Chipselect
*/
#define RF24_xfer(xdata) spi_xfer(RF24_SPI, xdata) //Send/receive data through SPI(controls RF24_CS manualy)___DON´T USE RF24_xfer() ALIAS FOR MORE THAN 1 xdata PARAMETER
#define RF24_select() output_low(RF24_CS) //Controls bit Chipselect
#define RF24_unselect() output_high(RF24_CS) //Controls bit Chipselect
#define RF24_enable() output_high(RF24_CE) //Controls bit Chipenable
#define RF24_disable() output_low(RF24_CE) //Controls bit Chipenable
#define RF24_IRQ_state() !input(RF24_IRQ) //IsOn when receive or transmit Data IRQ asserted
/*****************************************************************************************
******************************************************************************************
*
* RF24_comm_in : Send command and receive input(variable lenght, or fixed only 1 input byte)
* RF24_comm_out: Send command and send output(variable lenght)
*
* Dependencies:
* #device PASS_STRINGS=IN_RAM
*
* Parameters:
*
* comm: command to send(before sending or receiving data)
* datain: pointer to data array for receiving
* dataout: pointer to data array for sending
* dataSZ: data size(number of bytes for receiving into "datain" pointer)
*
* ex:
* data=RF24_comm_in(R_REGISTER|CONFIGURATION); //Read RF24 config register(receive only one byte into data variable)
* RF24_comm_in(R_REGISTER|RX_ADDR_P0, *address, 3); //Send command R_REGISTER|RX_ADDR_P0. After that, receives 3 bytes to array(or pointer). You can send strings directly
* RF24_comm_out(W_REGISTER|TX_ADDR_P0, *address, 5); //Writes 5 bytes from pointer address. Please, set RX address too(for shockburst auto acknowledge)
* RF24_comm_out(W_REGISTER|TX_ADDR_P0, "test", 4); //Writes 4 ascii bytes from pointer(string "test"). You can put strings directly
*/
int RF24_comm_in(int comm) { //Send command and receive input(receive only one byte)
int rv;
RF24_select();
RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
rv = RF24_xfer(0);
//! rv = spi_read2(); //It´s necessary due to spi_xfer read bug
RF24_unselect();
return rv; //Returns read value
}
//
void RF24_comm_in(int comm, char *datain, int dataSZ) { //Send command and receive input(dataSZ=number of input bytes)(datain=pointer to data for receiving)
#ifndef RF24_USE_DMA int i; #endif
RF24_select();
RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
#ifdef RF24_USE_DMA
DMA_read(dataSZ, datain); //Simple DMA Read and start transfer
DMA_start(); //Start DMA transfer
while(DMA_is_busy()); //DMA is working
#else //Programed IO mode(Normal mode)
for(i=0;i<dataSZ;i++) {
*(datain+i)=RF24_xfer(0);
//! *(datain+i)=spi_read2(); //It´s necessary due to spi_xfer read bug
}
#endif
RF24_unselect();
}
//
int RF24_comm_out(int comm, char *dataout, int dataSZ) { //Send command and send output string(dataSZ=number of bytes to output)(dataout=pointer to data for sending)
#ifndef RF24_USE_DMA int i; #endif
int rv; //rv=return value(SPI read value)
RF24_select();
RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)

#ifdef RF24_USE_DMA
DMA_write(dataSZ, dataout); //Simple DMA Write and start transfer
DMA_start(); //Start DMA transfer
while(DMA_is_busy()); //DMA is working
#else //Programed IO mode(Normal mode)
for(i=0;i<dataSZ;i++) {
RF24_xfer(*(dataout+i));
}
#endif
//! rv = RF24_xfer(comm); //just catch last spi_xfer received byte)
//! rv = spi_read2(); //It´s necessary due to spi_xfer read bug
RF24_unselect();
return rv; //Return last read value
}
/*****************************************************************************************
******************************************************************************************
* Send command (1 or 2 bytes), return status value of nRF24L01
*
* parameters:
* comm, comm1 : Commands to send
* commDS : Comm1 datasize in bits(8 to 32 bits, from lsb to msb)
*
* returns : It only returns nRF24 general STATUS register(see RF24_STATUS enum)
*
* ex:
* RF24_comm(W_REGISTER|CONFIGURATION, PWR_UP); //RF_packet CRC and nRF24L01+ configuration //1. Set PWR_UP = 1 and PRIM_RX = 0 in the CONFIG register.
* RF24_comm(W_REGISTER|RX_ADDR_P1, 0xA1A2A4, 24); //Address of data pipe 1. 5 Bytes maximumlength. (LSByte first). //Address was set as 0xA1A2A4 24bits(3 bytes)
*
*/
int RF24_comm(int comm) {
int rv; //rv=return value(SPI nRF24 status read value)
RF24_select();
rv=RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
//! rv=spi_read2(); //It´s necessary due to spi_xfer read bug
RF24_unselect();
return rv; //Return last read value
}
//
int RF24_comm(int comm, int comm1) {
int rv; //rv=return value(SPI nRF24 status read value)
RF24_select();
RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
rv=RF24_xfer(comm1); //Write config.value or command
//! rv=spi_read2(); //It´s necessary due to spi_xfer read bug
RF24_unselect();
return rv; //Return last read value
}
//
int RF24_comm(int comm, int32 comm1, int commDS) { //commDS=datasize(1 to 32 bits)
int rv; //rv=return value(SPI nRF24 status read value)
RF24_select();
RF24_xfer(comm); //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
rv=spi_xfer(RF24_SPI, comm1, commDS);//Write config.value or command(1 to 32 bits of data)___I CANNOT USE RF24_xfer() ALIAS BECAUSE IT NOT ACCEPTS MORE THAN 1 PARAMETER
//! rv=spi_read2(); //It´s necessary due to spi_xfer read bug
RF24_unselect();
return rv; //Return last read value
}
/*****************************************************************************************
******************************************************************************************
*************************General Driver commands******************************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
*************************General Driver commands******************************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
*************************General Driver commands******************************************
*****************************************************************************************/
/*****************************************************************************************
******************************************************************************************
* DEFINED MACROS
*
*
*/
//General command functions
//ex: RF24_FIFO_STATUS_TX_REUSE(RF24_FIFO_STATUS());
//
#define RF24_FLUSH_TX() RF24_comm(FLUSH_TX) //Flush TX FIFO, used in TX mode
#define RF24_FLUSH_RX() RF24_comm(FLUSH_RX) //Flush RX FIFO, used in RX mode. Should not be executed during transmission of acknowledge, that is, acknowledge package will not be completed.
#define RF24_REUSE_TX_PL() RF24_comm(REUSE_TX_PL) //(do not check for errors like TX_EMPTY)Reuse last transmitted payload. TX payload reuse is active until W_TX_PAYLOAD or FLUSH TX is executed. TX payload reuse must not be activated or deactivated during package transmission.
#define RF24_R_RX_PL_WID() RF24_comm_in(R_RX_PL_WID) //Read RX payload width for the top R_RX_PAYLOAD in the RX FIFO. Note: Flush RX FIFO if the read value is larger than 32 bytes.
#define RF24_W_TX_PAYLOAD_NOACK() RF24_comm(W_TX_PAYLOAD_NOACK) //Disables AUTOACK on this specific packet
//to be defined in function #define RF24_W_ACK_PAYLOAD(xpipe) RF24_comm(W_ACK_PAYLOAD&(xpipe&0b00000111))
//bits 0 to 2(value 0 a 5) Used in RX mode. Write Payload to be transmitted together with ACK packet on choosen Pipenumber(0 to 5). (Pipenumber valid in the range from 000 to 101[0d0 a 0d5]). Maximum three ACK packet payloads can be pending. Payloads with same pipenumber are handled using first in - first out principle. Write payload: 1– 32 bytes. A write operation always starts at byte 0.
//Several defined return functions(returns directly into input variable)
#define RF24_lost_packets() RF24_comm_in(R_REGISTER|OBSERVE_TX)>>4 //Know how many packets was lost during Transmition(with autoack feature enabled)
#define RF24_retry_packets() RF24_comm_in(R_REGISTER|OBSERVE_TX)&0b00001111 //Know how many retrys for transmit data(TX)(with autoack feature enabled)

#define RF24_RX_power_detector() RF24_comm_in(R_REGISTER|RX_POWER_DETECTOR) //Returns 1 if power is over -65dbm

#define RF24_setup_autoretry(delay,retrys) RF24_comm(W_REGISTER|SETUP_AUTORETRANSMISSION, (delay&0b11110000)|(retrys&0b00001111))
//delay=0to15(250 to 4000us)(delay between retrys, see datasheet), retrys=0to15(How many TX retrys)
//FIFO_STATUS defined functions(read fifo_status before check bits)
//ex: RF24_FIFO_STATUS_TX_REUSE(RF24_FIFO_STATUS());
//
#define RF24_FIFO_STATUS() RF24_comm_in(R_REGISTER|FIFO_STATUS) //Returns FIFO_STATUS Register
#define RF24_FIFO_STATUS_TX_REUSE(fstat) bit_test(fstat, 6) //(R)make RF24_enable for at least 10µs to Reuse last transmitted payload. TX payload reuse is active until W_TX_PAYLOAD or FLUSH TX is executed. TX_REUSE is set by the SPI command REUSE_TX_PL, and is reset by the SPI commands W_TX_PAYLOAD or FLUSH TX
#define RF24_FIFO_STATUS_TX_FULL(fstat) bit_test(fstat, 5) //(R)TX FIFO buffer full flag
#define RF24_FIFO_STATUS_TX_EMPTY(fstat) bit_test(fstat, 4) //(R)TX FIFO buffer empty
#define RF24_FIFO_STATUS_RX_FULL(fstat) bit_test(fstat, 1) //(R)RX FIFO buffer full flag
#define RF24_FIFO_STATUS_RX_EMPTY(fstat) bit_test(fstat, 0) //(R)RX FIFO buffer empty

//General STATUS register defined functions(read RF24 status[RF24_get_status()] before check bits)
//ex: RF24_STATUS_clr_IRQs(RF24_get_status());
//
#define RF24_get_status() RF24_comm(NOP) //Get nRF24 STATUS register in a fast way: It sends NO OPERATION command byte while receives STATUS register byte.
//
#define RF24_STATUS_extract_pipe_number(xstat) ((xstat&0b00001110)>>1) //Return received pipe number(0 to 5)
#define RF24_STATUS_RX_buffer_empty(xstat) (((xstat&RX_BUFFER_EMPTY)==RX_BUFFER_EMPTY)?true:false) //return true if RX_buffer_empty
#define RF24_STATUS_TX_buffer_full(xstat) bit_test(xstat, 0) //return true if TX_buffer_full
//
//Before commands below, use RF24_IRQ_state() to check if some interrupt occurred
#define RF24_STATUS_RX_dataready_IRQ(xstat) bit_test(xstat, 6) //return true if buffer_empty
#define RF24_STATUS_TX_datasent_IRQ(xstat) bit_test(xstat, 5) //return true if buffer_empty
#define RF24_STATUS_MAX_retrys_reached_IRQ(xstat) bit_test(xstat, 4) //return true if buffer_empty
//
//IRQs must be cleared through this command.
#define RF24_STATUS_clr_IRQs(xstat) RF24_comm(W_REGISTER|STATUS, xstat) //clear selected IRQs(in xstat)
//RF24_STATUS_clr_IRQs(IRQ_RX_dataready|IRQ_TX_datasent|IRQ_MAX_retransmit); //select IRQs to be cleared, or
//RF24_STATUS_clr_IRQs(IRQ_ALL); //clear all possible IRQs
//NOT_WORKS #define RF24_STATUS_clr_IRQs(xstat) RF24_comm(W_REGISTER|STATUS, (xstat&=IRQ_ALL) ) //clear selected IRQs(in xstat)
/*****************************************************************************************
******************************************************************************************
* DEFINED FUNCTIONS
*
*
*/
/*****************************************************************************************
******************************************************************************************
* Inicialize tris ports of uC
* ex: RF24_initPorts();
*/
void RF24_initPorts() {
int1 a;
//Control
RF24_unselect();
RF24_enable();
a=input(RF24_IRQ); //set tris register to input
//SPI initial states
a=input(SPI_MISO); //set tris register to input
output_low (SPI_MOSI);
output_low (SPI_CLK);
}
/*****************************************************************************************
******************************************************************************************
* Inicializa configuracao padrao nRF24L01+ (Ititializes default configuration for chip)
* ex: RF24_defconf();
*/
void RF24_default_config() { //Ititializes default configuration for chip nRF24L01+

#ifdef RF24_USE_DMA
DMA_default_config(); //Sets default DMA configuration
#endif

RF24_disable();

RF24_comm(W_REGISTER|CONFIGURATION, EN_CRC|CRC16|PWR_UP); //RF_packet CRC and nRF24L01+ configuration and initialization
//RF24_comm(W_REGISTER|CONFIGURATION, CRC16|PWR_UP); //NO_CRC, RF_packet CRC and nRF24L01+ configuration and initialization
RF24_PWUPDELAY();

RF24_comm(W_REGISTER|EN_AUTOACK, 0b00111111); //autoack in pipe 0,1,2,3,4 and 5
//RF24_comm(W_REGISTER|EN_AUTOACK, 0b00000000); //autoack in pipe 0,1,2,3,4 and 5

RF24_comm(W_REGISTER|EN_RXPIPES, 0b00000011); //****enable only pipes 0 and 1(pipes 2 to 5 are not used)

RF24_comm(W_REGISTER|SETUP_ADDRESSWIDTH, 1); //addresswidth setting[1 to 3(3 to 5 bytes)]
//ADDRESSWIDTH = 1 -> it means 3 bytes

RF24_comm(W_REGISTER|SETUP_AUTORETRANSMISSION, 0b00011111); //[7:4(250 to 4000us) autoretry delay, 3:0(0 to 15)Auto retry times]
//waitretry 500us , retry 15times //ARD=500µs is long enough for any ACK payload length in 1 or 2Mbps mode
RF24_comm(W_REGISTER|RF_CHANNEL, 0); //Set RF channel. F0= 2400 + RF_CHANNEL [MHz]. Use 1 channel of space for 250kbps to 1Mbps radios and 2 channels of space between 2Mbps radios.
// RF channel=0(2400MHz)
RF24_comm(W_REGISTER|RF_SETUP,RF_DR_2mbps|RF_PWR_0dBm); //Datarate 2Mbps. PowerAmplifier in 0dBm.

RF24_comm(W_REGISTER|STATUS, IRQ_RX_dataready|IRQ_TX_datasent|IRQ_MAX_retransmit); //Status Register (In parallel to the SPI command word applied on the MOSI pin, the STATUS register is shifted serially out on the MISO pin)
//Clear these tree interrupts

//RF24_comm(W_REGISTER|RX_ADDR_P0, //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
// 0xA1A2A300, 32); //Address 0xA1A2A3 24bits(3 bytes, the last fourth byte was written as 0x00)
RF24_comm_out(W_REGISTER|RX_ADDR_P0, //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
"0rdda", 5 ); //Address ascii "addr0"(5 bytes), LSB first. Because of that, it is writed on the contrary.
RF24_comm_out(W_REGISTER|RX_ADDR_P1, //Receive address data pipe 1. 5 Bytes maximumlength. (LSByte first)
"1rdda", 5 ); //Address ascii "addr1"(5 bytes), LSB first. Because of that, it is writed on the contrary.
RF24_comm_out(W_REGISTER|RX_ADDR_P2, //Receive address data pipe 2. 5 Bytes maximumlength. (LSByte first)
'2', 1); //Address ascii "addr2" (I can change only the LsByte)
RF24_comm_out(W_REGISTER|RX_ADDR_P3, //Receive address data pipe 3. 5 Bytes maximumlength. (LSByte first)
'3', 1); //Address ascii "addr3" (I can change only the LsByte)
RF24_comm_out(W_REGISTER|RX_ADDR_P4, //Receive address data pipe 4. 5 Bytes maximumlength. (LSByte first)
'4', 1); //Address ascii "addr4" (I can change only the LsByte)
RF24_comm_out(W_REGISTER|RX_ADDR_P5, //Receive address data pipe 5. 5 Bytes maximumlength. (LSByte first)
'5', 1); //Address ascii "addr5" (I can change only the LsByte)

RF24_comm_out(W_REGISTER|TX_ADDR, //(3 to 5 bytes)Transmit address. Used for a PTX device only.(LSByte first). Set RX_ADDR_P0 equal to this address to handle automatic acknowledge if Enhanced ShockBurst enabled
"0rdda", 5 ); //Address ascii "addr0"(5 bytes), LSB first. Because of that, it is writed on the contrary.

RF24_comm(W_REGISTER|RX_PW_P0, 32); //(set 1 to 32)RX payload size pipe0 set to 32 bytes
RF24_comm(W_REGISTER|RX_PW_P1, 32); //(set 1 to 32)RX payload size pipe1 set to 32 bytes
RF24_comm(W_REGISTER|RX_PW_P2, 32); //(set 1 to 32)RX payload size pipe2 set to 32 bytes
RF24_comm(W_REGISTER|RX_PW_P3, 32); //(set 1 to 32)RX payload size pipe3 set to 32 bytes
RF24_comm(W_REGISTER|RX_PW_P4, 32); //(set 1 to 32)RX payload size pipe4 set to 32 bytes
RF24_comm(W_REGISTER|RX_PW_P5, 32); //(set 1 to 32)RX payload size pipe5 set to 32 bytes
//although other pipes(pipe 2 to 5) are not used(see EN_RXPIPES setting)
RF24_comm(W_REGISTER|EN_DYNAMIC_PAYLOAD,0b00111111); //bits 0 to 5 enables in pipe0 to pipe5
//Dynamic payload Enabled in all pipes(pipe 0 to 5)

RF24_comm(W_REGISTER|DYN_PAYLOAD_CONFIG,EN_DPL|EN_ACK_PAY|EN_DYN_ACK); //Enables (DPL)Dynamic payload length feature. Enable to be able to transmit variable data lenght packets(from 1 to 32 data bytes)
//All DPL functions enabled

RF24_comm(W_REGISTER|FLUSH_RX); //Delete RX buffer(already transfered to buffer)
RF24_comm(W_REGISTER|FLUSH_TX); //Delete TX buffer(already transfered to buffer)
RF24_STATUS_clr_IRQs(IRQ_ALL); //clear IRQs

RF24_disable();
}//
/*****************************************************************************************
******************************************************************************************
* Constant carrier wave output for testing:
* (TX is always on transmitting sinc signal)
*
* The output power of a radio is a critical factor for achieving wanted range. Output
* power is also the first test criteria needed to qualify for all telecommunication regulations.
* Datasheet, see last page.
*/
void RF24_waveout_testing(int channel) { //TX is always on transmitting sinc signal

RF24_comm(W_REGISTER|CONFIGURATION, //RF_packet CRC and nRF24L01+ configuration
PWR_UP); //1. Set PWR_UP = 1 and PRIM_RX = 0 in the CONFIG register.
RF24_PWUPDELAY(); //2. Wait 1.5ms PWR_UP->standby.

RF24_comm(W_REGISTER|RF_SETUP, //3. In the RF register set: CONT_WAVE = 1. PLL_LOCK = 1. RF_PWR.
CONT_WAVE|PLL_LOCK|RF_DR_2Mbps|RF_PWR_0dBm); //Datarate 2Mbps. PowerAmplifier in 0dBm.

RF24_comm(W_REGISTER|RF_CHANNEL, channel);//4. Set the wanted RF channel. //If RF channel=0(2400MHz)(increases 1MHz per channel)

RF24_enable(); //5. Set CE high.
// //6. Keep CE high as long as the carrier is needed.
}//
/************************************************************************************
* Enhanced ShockBurst transmitting payload:
* Datasheet, see page 75.
*
*
*/
int RF24_TX_SET() { //Enhanced ShockBurst transmitting payload(return 1 if ok, return other number if error)
int data;
RF24_disable();
//
data=RF24_comm_in(R_REGISTER|CONFIGURATION); //Read RF24 config register
if ((data&PWR_UP)!=PWR_UP) return 0x02; //Error: Turn PWR_UP on before transmit
data&=~PRIM_RX; //1. Set the configuration bit PRIM_RX low.
RF24_comm(W_REGISTER|CONFIGURATION, data); //rewrite config data with PRIM_RX off(transmitter mode)//RF24_PWUPDELAY();

RF24_enable(); //3. A high pulse on CE starts the transmission. The minimum pulse width on CE is 10µs.
delay_us(10);
RF24_disable();

/*
2. When the application MCU has data to transmit, clock the address for the receiving node
(TX_ADDR) and payload data (TX_PLD) into nRF24L01+ through the SPI. The width of TX-payload
is counted from the number of bytes written into the TX FIFO from the MCU. TX_PLD must
be written continuously while holding CSN low. TX_ADDR does not have to be rewritten if it is
unchanged from last transmit. If the PTX device shall receive acknowledge, configure data pipe 0
to receive the ACK packet. The RX address for data pipe 0 (RX_ADDR_P0) must be equal to the
TX address (TX_ADDR) in the PTX device. For the example in Figure 14. on page 41 perform the
following address settings for the TX5 device and the RX device:
TX5 device: TX_ADDR = 0xB3B4B5B605
TX5 device: RX_ADDR_P0 = 0xB3B4B5B605
RX device: RX_ADDR_P5 = 0xB3B4B5B605
4. nRF24L01+ ShockBurst:
Radio is powered up.
16MHz internal clock is started.
RF packet is completed (see the packet description).
Data is transmitted at high speed (1Mbps or 2Mbps configured by MCU).
5. If auto acknowledgement is activated (ENAA_P0=1) the radio goes into RX mode immediately,
unless the NO_ACK bit is set in the received packet. If a valid packet is received in the valid
acknowledgement time window, the transmission is considered a success. The TX_DS bit in the
STATUS register is set high and the payload is removed from TX FIFO. If a valid ACK packet is
not received in the specified time window, the payload is retransmitted (if auto retransmit is
enabled). If the auto retransmit counter (ARC_CNT) exceeds the programmed maximum limit
(ARC), the MAX_RT bit in the STATUS register is set high. The payload in TX FIFO is NOT
removed. The IRQ pin is active when MAX_RT or TX_DS is high. To turn off the IRQ pin, reset the
interrupt source by writing to the STATUS register (see Interrupt chapter). If no ACK packet is
received for a packet after the maximum number of retransmits, no further packets can be transmitted
before the MAX_RT interrupt is cleared. The packet loss counter (PLOS_CNT) is incremented
at each MAX_RT interrupt. That is, ARC_CNT counts the number of retransmits that were
required to get a single packet through. PLOS_CNT counts the number of packets that did not get
through after the maximum number of retransmits.
6. nRF24L01+ goes into standby-I mode if CE is low. Otherwise, next payload in TX FIFO is transmitted.
If TX FIFO is empty and CE is still high, nRF24L01+ enters standby-II mode.
7. If nRF24L01+ is in standby-II mode, it goes to standby-I mode immediately if CE is set low.
*/
return 1; //Operation success
}//
/************************************************************************************
* Enhanced ShockBurst receiving payload:
* Datasheet, see page 76.
*
*
*/
int RF24_RX_SET() { //Enhanced ShockBurst receiving payload(return 1 if ok, return other number if error)
int i,data;

i = RF24_comm_in(R_REGISTER|FIFO_STATUS);
if ((i&RX_FULL)==RX_FULL) return 0; //Error: RX FIFO buffer full flag, must be read before receive new packets(REVISION 1.1)
//
data = RF24_comm_in(R_REGISTER|CONFIGURATION);
if ((data&PWR_UP)!=PWR_UP) return 0x02; //Error: Turn PWR_UP on before transmit
data|=PRIM_RX; //1. Select RX by setting the PRIM_RX bit in the CONFIG register to high.
RF24_comm(W_REGISTER|CONFIGURATION, data);
/*
All data pipes that receive
data must be enabled (EN_RXADDR register), enable auto acknowledgement for all pipes running
Enhanced ShockBurst (EN_AA register), and set the correct payload widths (RX_PW_Px registers).
Set up addresses as described in item 2 in the Enhanced ShockBurst transmitting payload
example above.
*/
RF24_enable(); //2. Start Active RX mode by setting CE high.
// //3. After 130µs nRF24L01+ monitors the air for incoming communication.
/*4. When a valid packet is received (matching address and correct CRC), the payload is stored in the
RX-FIFO, and the RX_DR bit in STATUS register is set high. The IRQ pin is active when RX_DR is
high. RX_P_NO in STATUS register indicates what data pipe the payload has been received in.
5. If auto acknowledgement is enabled, an ACK packet is transmitted back, unless the NO_ACK bit
is set in the received packet. If there is a payload in the TX_PLD FIFO, this payload is added to
the ACK packet.*/
//RF24_disable(); //6. MCU sets the CE pin low to enter standby-I mode (low current mode).
// //7. MCU can clock out the payload data at a suitable rate through the SPI.
// //8. nRF24L01+ is now ready for entering TX or RX mode or power down mode.
return true; //Success
}//
/************************************************************************************
* Change address for transmiting data:
*
* Parameters:
*
* address : transmit address
* addrsize : address size in bits(3 to 5 bytes). (can be int32, array or pointer)
* ShockBurst: set true if shockburst is active(because it have to change TX and RX receive address)
* returns //True if ok. 0 if error
*
* Ex:
* RF24_TX_setaddress(*addr, 5, true) or //5 bytes address lenght read from pointer *addr, set. Shockburst on mode(Sets Pipe0 receive address as the same).
* RF24_TX_setaddress("6aA7G", 5, true) //5 bytes address lenght(ascii) read and set as "6aA7G". Shockburst on mode(Sets Pipe0 receive address as the same).
*/
short int RF24_TX_setaddress(char *address, int addrsize, short int ShockBurst) { //Change address for transmiting data(with or without shockburst)
if ((addrsize<3)||(addrsize>5)) return 0; //Error: Wrong address size
//
RF24_comm_out(W_REGISTER|TX_ADDR, address, addrsize); //Set TX address

if (ShockBurst) { //Set RX_ADDR_P0 equal to this address to handle automatic acknowledge if Enhanced ShockBurst enabled
RF24_comm_out(W_REGISTER|RX_ADDR_P0, address, addrsize); //Set RX address(for shockburst auto acknowledge)
}
return true; //Success
}//
/************************************************************************************
* Transmit data(1 to 32 bytes) to actual address:
*
* Parameters:
*
* datasize : number of bytes in TX pointer_buffer(1 to 32) for transmiting
* burst : This function disable packet acknowledge receiving. It makes the link less reliable, but tree times faster.
* true: No returning acknowledge(triplicates datarate in 2Mbps). You can reach max. transfer speed(200KByte/s).
* false: Without burst, the max speed is 70KByte/s(It´s good when in low power, long range or noise is present).
* buffer : buffer where data for transmiting is
* returns : Returns true(1) if data put into buffer. Other if not(error)
*
*/
int RF24_TX_putbuffer(short int burst, int datasize, char *buffer) {//Transmit data(1 to 32 bytes) to actual address
int i;
//
if ((datasize==0)||(datasize>32)) return 2; //datasize must be 1 to 32
//
i = RF24_get_status(); //receive status data in i.
if (RF24_STATUS_TX_buffer_full(i)) return 3; //error: buffer full(Flush TX buffer)
if (RF24_IRQ_state()) { //Check what interrupt was set
if (RF24_STATUS_TX_datasent_IRQ(i)) return 4; //Error: TX interrupt not cleared
if (RF24_STATUS_MAX_retrys_reached_IRQ(i)) return 5;//Error: TX interrupt MAX_RETRYS not cleared
}
//
//Load data to nRF24L01+
if (burst==true) //No returning acknowledge(triplicates datarate in 2Mbps)
RF24_comm_out(W_TX_PAYLOAD_NOACK, buffer, datasize); //Send command and send output string(dataSZ=number of bytes to output)(dataout=pointer to data for sending)
else //Normal(waits for aknowledge). It´s good when in low power, long range or noise is present.
RF24_comm_out(W_TX_PAYLOAD, buffer, datasize); //Send command and send output string(dataSZ=number of bytes to output)(dataout=pointer to data for sending)
//
RF24_enable();
return true; //Data transmited
}//
/************************************************************************************
* Ckeck TX acknowledge register:
*
* returns //Returns true(1) if data transmited(with ACK received). Other if not(error)
*
*/
//NOT IMPLEMENTED
//
/************************************************************************************
* Retransmit last TX data present in TX buffer.
*
* returns : Returns true(1) if data transmited(with ACK received). Other if not(error)
* ps : FLUX_TX if do not want to retransmit infinitely
*/
int RF24_TX_reusebuffer() { //Retransmit last TX data present in TX buffer
int i;
i = RF24_comm_in(R_REGISTER|FIFO_STATUS);
if (i==TX_EMPTY) return 0; //Error: TX_Flushed
//
//Load data to nRF24L01+
RF24_comm(REUSE_TX_PL); //Reuse last transmitted payload. TX payload reuse is active until W_TX_PAYLOAD or FLUSH TX is executed. TX payload reuse must not be activated or deactivated during package transmission.

RF24_enable();

return true; //Success
}//
/************************************************************************************
* Receive data(1 to 32 bytes) into buffer:
*
* Parameters:
*
* pipe //return number of received pipe(0 to 5)
* datasize //return number of received bytes in RX buffer(1 to 32)
* buffer //32bytes buffer for received data(can be a pointer or an array)
* returns //Returns true(1) if data received. False(0) if not
*
*/
int RF24_RX_getbuffer(int *pipe, int *datasize, char *buffer) { //Receive data(1 to 32 bytes) into buffer
int i;
//
RF24_enable(); //Enables receiver
if (!RF24_IRQ_state()) return 0; //No data received(no IRQ set)
//
i = RF24_get_status(); //receive status data in i.
if (!RF24_STATUS_RX_dataready_IRQ(i)) return 2; //No data received(another IRQ was set)
//
*pipe = RF24_STATUS_extract_pipe_number(i); //Extract received pipe number(0 to 5)
//
*datasize = RF24_comm_in(R_RX_PL_WID); //Read RX payload width for the top R_RX_PAYLOAD in the RX FIFO.
if (*datasize>32 || *datasize==0) { //Note: Flush RX FIFO if the read value is larger than 32 bytes.
RF24_comm(FLUSH_RX); //Delete RX buffer
RF24_STATUS_clr_IRQs(IRQ_RX_dataready); //clear RX IRQ
return 3; //RX error
}
//
//hehe
RF24_STATUS_clr_IRQs(IRQ_RX_dataready); //clear RX IRQ
//RF24_STATUS_clr_IRQs(IRQ_ALL); //clear All irqs
//Load data from nRF24L01+
RF24_comm_in(R_RX_PAYLOAD, buffer, *datasize); //Read RX-payload: 1 – 32 bytes. A read operation always starts at byte 0. Payload is deleted from FIFO after it is read. Used in RX mode.
return true; //Data received
}//
/************************************************************************************
* Beep if there is RFsignal stronger that -64dB on choosen channel
*
* returns //Returns true(1) if data received. False(0) if not
*
*/
#define buzzer_on() set_pwm1_duty(61) //Liga Buzzer
#define buzzer_off() set_pwm1_duty(0) //Desliga Buzzer
int RF24_check_rfsignal() { //Beep if there is RFsignal stronger that -64dB on choosen channel
int rfstat=0;
while(true) {
RF24_comm_in(R_REGISTER|RX_POWER_DETECTOR, &rfstat, 1);
if (rfstat==0) {
buzzer_off(); delay_ms(1);
return false; }
else {
buzzer_on(); delay_ms(1);
return true;
}
}
}//
/************************************************************************************
* Check actual configuration
* (only for debugging purposes, stop in each delay)
*
*
*/
void RF24_check_config() { //Check actual configuration(only for debugging purposes, stop in each delay)
int bbuf[40];

RF24_comm_in(R_REGISTER|CONFIGURATION, bbuf, 1); //EN_CRC|CRC16|PWR_UP); //RF_packet CRC and nRF24L01+ configuration and initialization
delay_ms(10);

RF24_comm_in(R_REGISTER|EN_AUTOACK, bbuf, 1); //0b00011111); //autoack in pipe 0,1,2,3,4 and 5
delay_ms(10);

RF24_comm_in(R_REGISTER|EN_RXPIPES, bbuf, 1); //0b00000011); //****enable only pipes 0 and 1(pipes 2 to 5 are not used)
delay_ms(10);

RF24_comm_in(R_REGISTER|SETUP_ADDRESSWIDTH, bbuf, 1); //, 1); //addresswidth setting[1 to 3(3 to 5 bytes)]//ADDRESSWIDTH = 1 -> it means 3 bytes
delay_ms(10);
RF24_comm_in(R_REGISTER|SETUP_AUTORETRANSMISSION, bbuf, 1); //[7:4(250 to 4000us) autoretry delay, 3:0(0 to 15)Auto retry times]
//0b00011111); //waitretry 500us , retry 15times //ARD=500µs is long enough for any ACK payload length in 1 or 2Mbps mode
delay_ms(10);

RF24_comm_in(R_REGISTER|RF_CHANNEL, bbuf, 1); //, 0); //Set RF channel. F0= 2400 + RF_CHANNEL [MHz]. Use 1 channel of space for 250kbps to 1Mbps radios and 2 channels of space between 2Mbps radios.//RF channel=0(2400MHz)
delay_ms(10);
RF24_comm_in(R_REGISTER|RF_SETUP, bbuf, 1); //, RF_DR_2Mbps|RF_PWR_0dBm); //Datarate 2Mbps. PowerAmplifier in 0dBm.
delay_ms(10);

RF24_comm_in(R_REGISTER|STATUS, bbuf, 1); //, //Status Register (In parallel to the SPI command word applied on the MOSI pin, the STATUS register is shifted serially out on the MISO pin)
//IRQ_RX_dataready|IRQ_TX_datasent|IRQ_MAX_retransmit); //Clear these tree interrupts
delay_ms(10);

RF24_comm_in(R_REGISTER|RX_ADDR_P0, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 ) //, //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
//0xA1A2A3, 24); //Address 0xA1A2A3 24bits(3 bytes)
delay_ms(10);
RF24_comm_in(R_REGISTER|RX_ADDR_P1, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 ) //, //Receive address data pipe 1. 5 Bytes maximumlength. (LSByte first)
//0xA1A2A4, 24); //Address 0xA1A2A4 24bits(3 bytes)
delay_ms(10);

RF24_comm_in(R_REGISTER|TX_ADDR, bbuf, 5); //, //(3 to 5 bytes)Transmit address. Used for a PTX device only.(LSByte first). Set RX_ADDR_P0 equal to this address to handle automatic acknowledge if Enhanced ShockBurst enabled
//0xA1A2A3, 24); //Address 0xA1A2A3 24bits(3 bytes)
delay_ms(10);

RF24_comm_in(R_REGISTER|RX_PW_P0, bbuf, 1); //, 32); //(set 1 to 32)RX payload size pipe0 set to 32 bytes
delay_ms(10);
RF24_comm_in(R_REGISTER|RX_PW_P1, bbuf, 1); //, 32); //(set 1 to 32)RX payload size pipe1 set to 32 bytes
delay_ms(10);

RF24_comm_in(R_REGISTER|EN_DYNAMIC_PAYLOAD, bbuf, 1); //,//bits 0 to 5 enables in pipe0 to pipe5
//0b00111111); //Dynamic payload Enabled in all pipes(pipe 0 to 5)
delay_ms(10);
}//

I think tomorow,I'll port code to PIC16F887 for testing:
Do you have an idea to slove this error?
Thanks you.
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temtronic

Joined: 01 Jul 2010
Posts: 9243
Location: Greensville,Ontario


Posted: Thu Aug 13, 2015 9:08 am

items that quickly come to mind. 1) Is the PIC powered with 3 volts? I have those nRF2401 devices and they are 3 volts only, so the PIC needs to be 3 volts as well for direct connections 2) MOSI for the PIC goes to MISO of the RF unit, and vice versa. 3) Does the PIC run a '1Hz LED program? Do that first to confirm hardware/programming works. 4) Have you the correct pullups for the IRQ line ? Jay

tienchuan

Joined: 25 Aug 2009
Posts: 175

Posted: Thu Aug 13, 2015 9:20 am

temtronic wrote:

items that quickly come to mind.
1) Is the PIC powered with 3 volts? I have those nRF2401 devices and they are 3 volts only, so the PIC needs to be 3 volts as well for direct connections

2) MOSI for the PIC goes to MISO of the RF unit, and vice versa.

3) Does the PIC run a '1Hz LED program? Do that first to confirm hardware/programming works.

4) Have you the correct pullups for the IRQ line ?

Jay

Thanks for your support:)
About steps 1 to 3 I checked, and it's OK, PIC and NRF24L01 is supplied 3.27V from 3.3V regulator IC AMS1117, so that I think a power supply is OK ( I also added 10uF/16V // 100nF at Vcc and ground of NRF24L01 module, but the result not change)
And I done a program with led blink 1hZ to check internal osscilator, and it blinked right.
And only step4, I dont use a R pullup for IRQ pin , maybe I forgot it ( serious if it is an error :D, tomorrow, i 'll try with your cmt)
THanks you Smile

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Ttelmah

Joined: 11 Mar 2010
Posts: 19539


Posted: Thu Aug 13, 2015 2:24 pm

OK. The version you have, already has the spi_read's commented out. Your problem is the stream name. The SPI stream needs to be called RF24_SPI. This is what the driver talks to....

tienchuan

Joined: 25 Aug 2009
Posts: 175

Posted: Thu Aug 13, 2015 10:18 pm

Hi everybody Smile

Today, I tried to adding a pullup resistor on IRQ pin but doesn't change.
And about the stream name, in software spi, i config and re-define it same, can you check it in below:

Code:

#USE SPI( FORCE_SW,MASTER, DI=PIN_C1, DO=PIN_C2, CLK=PIN_C0, BAUD=1000000, MODE=0, BITS=8, MSB_FIRST, STREAM=STREAM_SPI)

Code:

#define RF24_SPI STREAM_SPI

I don't known why both hardware spi and software spi can not init on this pic :(
Can you have another ideas to fix it ?:|
Thanks you!
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Ttelmah

Joined: 11 Mar 2010
Posts: 19539


Posted: Fri Aug 14, 2015 12:19 am

Why not just call the stream RF24_SPI as required?. The define route 'ought' to work, but it is relying on stream names being subject to the standard MACRO expansion. No guarantees that they are. It's like a lot of things. It 'ought' to be possible to do, 'why stretch the limits'?.

tienchuan

Joined: 25 Aug 2009
Posts: 175

Posted: Fri Aug 14, 2015 12:36 am

Hi Ttelmah:
I also used the old driver on this forum, I don't change any:)
I don't sure about your ideas , maybe my English is bad :|
I tried to replace stream spi as you told ( I think ) to don't use the define stream for SPI and use it direct in spi_xfer() function, so that I changed put a cmt with stream define

Code:

//!#define RF24_SPI STREAM_SPI

And change in NRF24L01.c file

Code:

#define RF24_xfer(xdata) spi_xfer[b](STREAM_SPI[/b], xdata)

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Ttelmah

Joined: 11 Mar 2010
Posts: 19539

Posted: Fri Aug 14, 2015 4:24 am

Code:

#USE SPI( FORCE_SW, MASTER, DI=PIN_C2, DO=PIN_C1, CLK=PIN_C0, BAUD=1000000, MODE=0, BITS=8, MSB_FIRST, STREAM=RF24_SPI)

tienchuan

Joined: 25 Aug 2009
Posts: 175


Posted: Mon Aug 17, 2015 1:22 am

Huhmm:D Today I find an errors in my circuit, I used PIN_A1 and PIN_A0 of PIC16LF1455 to output, but I checked a datasheet, those pins is only input pin> I change to Pin_A5 and Pin_A4, it run well. Sorry about my careless, thanks for all supports! _________________ Begin Begin Begin !!!

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