Nrf24l01. Some examples to get start.

[Easyrider83]

Here I'll share my codes for this nordic wireless solution.
First of all I should warn that I'm not answering a stupid questions.
So, lets get start.

Some of my projects with NRF24L01 use.
Radio Key based on STM8S microcontroller, powered by CR2032 battery. Working range 1-10m depends of output power.
View attachment Schematic2_STM8.rar
Software example for previos project for IAR.
View attachment IAR_STM8S_RadioKey.rar
Initialization example with my code library:

unsigned char Init_NRF24L01 (void)
{
    /*24L01 INIT*/
  RF_InitTypeDef RF_InitStruct;
  RF_InitStruct.RF_Power_State=RF_Power_On;
  RF_InitStruct.RF_Config=RF_Config_IRQ_RX_Off|RF_Config_IRQ_TX_On|RF_Confing_IRQ_Max_Rt_On;
  RF_InitStruct.RF_CRC_Mode=RF_CRC16_On;
  RF_InitStruct.RF_Mode=RF_Mode_TX;
  RF_InitStruct.RF_Pipe_Auto_Ack=RF_Pipe0_Ack_Enable;
  RF_InitStruct.RF_Enable_Pipe=RF_Pipe0_Enable;
  RF_InitStruct.RF_Setup=RF_Setup_5_Byte_Adress;
  RF_InitStruct.RF_TX_Power=RF_TX_Power_High;
  RF_InitStruct.RF_Data_Rate=RF_Data_Rate_1Mbs;
  RF_InitStruct.RF_Channel=0x35;
  RF_InitStruct.RF_RX_Adress_Pipe0[0]='B';
  RF_InitStruct.RF_RX_Adress_Pipe0[1]='A';
  RF_InitStruct.RF_RX_Adress_Pipe0[2]='T';
  RF_InitStruct.RF_RX_Adress_Pipe0[3]='O';
  RF_InitStruct.RF_RX_Adress_Pipe0[4]='N';
  RF_InitStruct.RF_TX_Adress[0]='B';
  RF_InitStruct.RF_TX_Adress[1]='A';
  RF_InitStruct.RF_TX_Adress[2]='T';
  RF_InitStruct.RF_TX_Adress[3]='O';
  RF_InitStruct.RF_TX_Adress[4]='N';
  RF_InitStruct.RF_Payload_Size_Pipe0=16;
  RF_InitStruct.RF_Auto_Retransmit_Count=1;
  RF_InitStruct.RF_Auto_Retransmit_Delay=1;
  return RF_Init(&RF_InitStruct);
}

This picture should explain how this library works. The NRF24L01.c and header file are common for all processors and architectures.

For example, GPIO library for Microchip controllers looks like this:

void PIN_ON (char * port, char pin)
{
 *port|=(1<<pin);
}

void PIN_OFF (char * port, char pin)
{
 *port&=~(1<<pin);
}

For STM8S:

void PIN_ON(GPIO_TypeDef * GPIOx,u8 PINx)
{
	GPIOx->ODR=GPIOx->IDR|PINx;
}

void PIN_OFF(GPIO_TypeDef * GPIOx,u8 PINx)								
{
	GPIOx->ODR=GPIOx->IDR&(~(PINx));
}

u8 PIN_SYG(GPIO_TypeDef * GPIOx, u8 PINx)
{
        return GPIOx->IDR&PINx;
}

void PIN_IN (GPIO_TypeDef * GPIOx,u8 PINx)
{
        GPIOx->DDR&=(~PINx);
}

void PIN_OUT_PP (GPIO_TypeDef * GPIOx,u8 PINx)
{
        GPIOx->DDR|=PINx;
}

void PIN_INV(GPIO_TypeDef * GPIOx, u8 PINx)
{
	GPIOx->ODR=GPIOx->IDR^PINx;
}

For STM32 (shorted)

void PIN_ON(GPIO_TypeDef * GPIOx,u16 PINx)
{
	#ifdef STM32_BitBang
		GPIOx->BSRR=PINx;
	#else
		GPIOx->ODR=GPIOx->IDR|(PINx);
	#endif
}

Support bitbang for faster response.
The same way we are using SPI peripheral (you'll find an examples inside attachments).

For Keil uVision I wrote an Wizard that perform all initiation procedures. Attaching them too:
View attachment NRF24L01_STM32_Keil.rar
And for bonus today I have finished the wizard configuration utility:
**broken link removed**

And some example how to use NRF24L01 with ARM based STM32F100 for Keil uVision 4.
View attachment TEST_MODULEv2.rar
Hope I will have some time to support this topic.

 

[zia]

thanx, nice work
let see whether its working or not

 

[Easyrider83]

You kidding?
Sure it is working. A made a lot of wireless projects with this codes.

 

[zia]

thnx easyrider83 for your help in nrf24l01!
note: a good help of atmeage is just search google mirf v2 arduino and enjoy and for pic dyembedded is best site according to my observation.

 

[tuanhai1989]

good job!, very thank you. Can you tell me life time battery (CR2032) of this radio key, I'm developing a product same idea with you an it's life time of battery very short. I try open your schematic but not possible. Thank again :wink: