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#define _nRF24L01_C_
#include "nRF24L01.h"
INT8U CE_Status = 0;
/*
================================================================================
Function : L01_GetCEStatus( )
Description : Get the status of the CE PIN
Input : NONE
Output: 1:CE=1, 0:CE=0
================================================================================
*/
INT8U L01_GetCEStatus( void )
{
return CE_Status;
}
/*
================================================================================
Function : L01_SetCE( )
Description : Set the CE PIN as 1 or 0
Input : -status, 1: CE=1, 0: CE=0
Output: None
================================================================================
*/
void L01_SetCE( INT8U status )
{
CE_Status = status;
if( status == 0 ) { L01_CE_LOW( ); }
else { L01_CE_HIGH( ); }
}
/*
================================================================================
Function : L01_ReadSingleReg( )
Description : Read a single register of nRF24L01
Input : -Addr, The address of the register
Output: The value read from the register
================================================================================
*/
INT8U L01_ReadSingleReg( INT8U Addr )
{
INT8U btmp;
L01_CSN_LOW( );//PB2輸出低電平
SPI_ExchangeByte( R_REGISTER | Addr );
btmp = SPI_ExchangeByte( 0xFF );
L01_CSN_HIGH( );//PB2輸出高電平
return btmp;
}
/*
================================================================================
Function : L01_ReadMultiReg( )
Description : Read several registers of nRF24L01
Input : -StartAddr, The start address of the registers
-nBytes, How many registers do you want to read
-pBuff, The buffer to save the values
Output: None
================================================================================
*/
/*void L01_ReadMultiReg( INT8U StartAddr, INT8U nBytes, INT8U *pBuff )
{
INT8U btmp;
L01_CSN_LOW( );
SPI_ExchangeByte( R_REGISTER | StartAddr );
for( btmp = 0; btmp < nBytes; btmp ++ )
{
*( pBuff + btmp ) = SPI_ExchangeByte( 0xFF );
}
L01_CSN_HIGH( );
}
================================================================================
Function : L01_WriteSingleReg( )
Description : Write a single byte to a register
Input : -Addr, The address of the register
-Value, The value to be written
Output: None
================================================================================
*/
void L01_WriteSingleReg( INT8U Addr, INT8U Value )
{
INT8U tmp = L01_GetCEStatus( );
L01_SetCE( 0 );
L01_CSN_LOW( );
SPI_ExchangeByte( W_REGISTER | Addr );
SPI_ExchangeByte( Value );
L01_CSN_HIGH( );
L01_SetCE( tmp );
}
/*
================================================================================
Function : L01_WriteMultiReg( )
Description : Read several registers of nRF24L01
Input : -StartAddr, The start address of the registers
-pBuff, The buffer store the values
-Length, How many registers do you want to write
Output: None
================================================================================
*/
void L01_WriteMultiReg( INT8U StartAddr, INT8U *pBuff, INT8U Length )
{
INT8U i;
INT8U tmp = L01_GetCEStatus( );
L01_SetCE( 0 );
L01_CSN_LOW( );
SPI_ExchangeByte( W_REGISTER | StartAddr );
for( i = 0; i < Length; i ++ )
{
SPI_ExchangeByte( *( pBuff + i ) );
}
L01_CSN_HIGH( );
L01_SetCE( tmp );
}
/*
================================================================================
Function : L01_FlushTX( )
Description : Flush the TX buffer
Input : None
Output: None
================================================================================
*/
void L01_FlushTX( void )
{
L01_CSN_LOW( );
SPI_ExchangeByte( FLUSH_TX );
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_FlushRX( )
Description : Flush the RX buffer
Input : None
Output: None
================================================================================
*/
void L01_FlushRX( void )
{
L01_CSN_LOW( );
SPI_ExchangeByte( FLUSH_RX );
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_ReuseTXPayload( )
Description : Reuse the last transmitted payload
Input : None
Output: None
================================================================================
*/
void L01_ReuseTXPayload( void )
{
L01_CSN_LOW( );
SPI_ExchangeByte( REUSE_TX_PL );
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_Nop( )
Description : nop operation of nRF24L01
Input : None
Output: None
================================================================================
*/
void L01_Nop( void )
{
L01_CSN_LOW( );
SPI_ExchangeByte( L01_NOP );
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_ReadStatusReg( )
Description : Read statu register of nRF24L01
Input : None
Output: Statu register of nRF24L01
================================================================================
*/
INT8U L01_ReadStatusReg( void )
{
INT8U Status;
L01_CSN_LOW( );
Status = SPI_ExchangeByte( R_REGISTER + L01REG_STATUS );
L01_CSN_HIGH( );
return Status;
}
/*
================================================================================
Function : L01_ClearIRQ( )
Description : Clear IRQ cuased by nRF24L01
Input : None
Output: None
================================================================================
*/
void L01_ClearIRQ( INT8U IRQ_Source )
{
INT8U btmp = 0;
IRQ_Source &= ( 1<<RX_DR ) | ( 1<<TX_DS ) | ( 1<<MAX_RT );
btmp = L01_ReadStatusReg( );
L01_CSN_LOW( );
L01_WriteSingleReg( L01REG_STATUS, IRQ_Source | btmp );
L01_CSN_HIGH( );
L01_ReadStatusReg( );
}
/*
================================================================================
Function : L01_ReadIRQSource( )
Description : Read the IRQ source of nRF24L01+
Input : None
Output: IRQ source mask code
================================================================================
*/
INT8U L01_ReadIRQSource( void )
{
return ( L01_ReadStatusReg( ) & ( ( 1<<RX_DR ) | ( 1<<TX_DS ) | ( 1<<MAX_RT ) ) );
}
/*
================================================================================
Function : L01_ReadTopFIFOWidth( )
Description : Read the payload width of the top buffer of FIFO
Input : None
Output: The width of the pipe buffer
================================================================================
*/
INT8U L01_ReadTopFIFOWidth( void )
{
INT8U btmp;
L01_CSN_LOW( );
SPI_ExchangeByte( R_RX_PL_WID );
btmp = SPI_ExchangeByte( 0xFF );
L01_CSN_HIGH( );
return btmp;
}
/*
================================================================================
Function : L01_ReadRXPayload( )
Description : Read the RX payload from internal buffer
Input : -pBuff, buffer to store the data
Output: The length of data read
================================================================================
*/
INT8U L01_ReadRXPayload( INT8U *pBuff )
{
INT8U width, PipeNum;
PipeNum = ( L01_ReadSingleReg( L01REG_STATUS ) >> 1 ) & 0x07;
width = L01_ReadTopFIFOWidth( );
L01_CSN_LOW( );
SPI_ExchangeByte( R_RX_PAYLOAD );
for( PipeNum = 0; PipeNum < width; PipeNum ++ )
{
*( pBuff + PipeNum ) = SPI_ExchangeByte( 0xFF );
}
L01_CSN_HIGH( );
L01_FlushRX( );
return width;
}
/*
================================================================================
Function : L01_WriteTXPayload( )
Description : Write TX payload to a pipe and prx will return ack back
Input : -PipeNum, number of the pipe
-pBuff, A buffer stores the data
-nBytes, How many bytes to be wrote to
Output: None
================================================================================
*/
void L01_WriteTXPayload_Ack( INT8U *pBuff, INT8U nBytes )
{
INT8U btmp;
INT8U length = ( nBytes > 32 ) ? 32 : nBytes;
L01_FlushTX( );
L01_CSN_LOW( );
SPI_ExchangeByte( W_TX_PAYLOAD );
for( btmp = 0; btmp < length; btmp ++ )
{
SPI_ExchangeByte( *( pBuff + btmp ) );
}
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_WritePayload_NoAck( )
Description : write data in tx mode, and prx won't return ack back
Input : -Data, A buffer stores the address data
-Data_Length, How many bytes of the data buff
Output: None
================================================================================
*/
void L01_WriteTXPayload_NoAck( INT8U *Data, INT8U Data_Length )
{
if( Data_Length > 32 || Data_Length == 0 )
{
return ;
}
L01_CSN_LOW( );
SPI_ExchangeByte( W_TX_PAYLOAD_NOACK );
while( Data_Length-- )
{
SPI_ExchangeByte( *Data++ );
}
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_WritePayload_InAck( )
Description : write data in tx fifo when rx mode
Input : -Data, A buffer stores the address data
-Data_Length, How many bytes of the data buff
Output: None
================================================================================
*/
void L01_WriteRXPayload_InAck( INT8U *pData, INT8U Data_Length )
{
INT8U length = ( Data_Length > 32 ) ? 32 : Data_Length;
INT8U btmp;
L01_CSN_LOW( );
SPI_ExchangeByte( W_ACK_PAYLOAD );
for( btmp = 0; btmp < length; btmp ++ )
{
SPI_ExchangeByte( *( pData + btmp ) );
}
L01_CSN_HIGH( );
}
/*
================================================================================
Function : L01_SetTXAddr( )
Description : Write address for the own device
Input : -pAddr, A buffer stores the address data
-Addr_Length, How many bytes of the address
Output: None
================================================================================
*/
void L01_SetTXAddr( INT8U *pAddr, INT8U Addr_Length )
{
INT8U Length = ( Addr_Length > 5 ) ? 5 : Addr_Length;
L01_WriteMultiReg( L01REG_TX_ADDR, pAddr, Length );
}
/*
================================================================================
Function : L01_SetRXAddr( )
Description : Write address for a RX pipe
Input : -PipeNum, number of the pipe
-pAddr, A buffer stores the address data
-Addr_Length, How many bytes of the address
Output: None
================================================================================
*/
void L01_SetRXAddr( INT8U PipeNum, INT8U *pAddr, INT8U Addr_Length )
{
INT8U Length = ( Addr_Length > 5 ) ? 5 : Addr_Length;
INT8U pipe = ( PipeNum > 5 ) ? 5 : PipeNum;
L01_WriteMultiReg( L01REG_RX_ADDR_P0 + pipe, pAddr, Length );
}
/*
================================================================================
Function : L01_SetSpeed )
Description : Send the communication speed of the RF device
Input : speed,
Output: None
================================================================================
*/
void L01_SetSpeed( L01SPD speed )
{
INT8U btmp = L01_ReadSingleReg( L01REG_RF_SETUP );
btmp &= ~( ( 1<<5 ) | ( 1<<3 ) );
if( speed == SPD_250K ) //250K
{
btmp |= ( 1<<5 );
}
else if( speed == SPD_1M ) //1M
{
btmp &= ~( ( 1<<5 ) | ( 1<<3 ) );
}
else if( speed == SPD_2M ) //2M
{
btmp |= ( 1<<3 );
}
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