stm32f103c8t6-nrf24l01

I use Keil C 5 (V 5.11.0.0) + STM32CubeMX (V4.21.0)

Pin connection:

Transmitter & Receiver (same pin connection)

STM32F103C8T6 | NRF24L01

3.3V --> VCC

PA1 --> CE

PA2 --> CSN

PA3 --> SCK

PA4 --> MOSI

PA5 --> MISO

GND --> GND

STM32CubeMX

Pinout:

RCC

--- High Speed Clock: Crystal/Ceramic Resonator

SYS

--- Debug: Serial Wire

UART1

--- Mode: Asynchronous

Clock Configuration

HCLK (MHz): 72 MHz

Configuration

GPIO PA1,PA2, PA3, PA4: GPIO_Output

PA5: GPIO_Input

(Optional) PC13: GPIO_Output

PA1,PA2, PA3, PA4: Maxium output speed: High (all from PA1 to PA4)

PA5: Maxium output speed: n/a

PC13: Maxium output speed: Low (==no change)

User Label:

PA1: NRF_CE

PA2: NRF_CSN

PA3: NRF_SCK

PA4: NRF_MOSI

PA5: NRF_MISO

UART1: NVIC settings: Enabled -> True

Then Generate code to Keil C 5 Mcu: STM32F103C8Tx

Firmware Package Name and Version:

STM32Cube FW_F1 V1.4.0

Use Default Firmware Location: C:\Users\YOURUSERNAME\STM32Cube\Repository\STM32Cube_FW_F1_V1.4.0

Keil C 5

Add CTR_nrf24l01.c to Application/User folder

in main.c Cut (in MX_GPIO_Init function) /*Configure GPIO pins : NRF_CE_Pin NRF_CSN_Pin NRF_SCK_Pin NRF_MOSI_Pin */ GPIO_InitStruct.Pin = NRF_CE_Pin|NRF_CSN_Pin|NRF_SCK_Pin|NRF_MOSI_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/*Configure GPIO pin : NRF_MISO_Pin */ GPIO_InitStruct.Pin = NRF_MISO_Pin; GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(NRF_MISO_GPIO_Port, &GPIO_InitStruct); Then paste to CTR_nrf24l01.h in CTR_nrfPinConfig

Cut (in main.h) #define NRF_CE_Pin GPIO_PIN_1 #define NRF_CE_GPIO_Port GPIOA #define NRF_CSN_Pin GPIO_PIN_2 #define NRF_CSN_GPIO_Port GPIOA #define NRF_SCK_Pin GPIO_PIN_3 #define NRF_SCK_GPIO_Port GPIOA #define NRF_MOSI_Pin GPIO_PIN_4 #define NRF_MOSI_GPIO_Port GPIOA #define NRF_MISO_Pin GPIO_PIN_5 #define NRF_MISO_GPIO_Port GPIOA to CTR_nrf24l01.h (overwrite existing one after line "#include "stm32f1xx_hal.h"")

main.c Add #include "CTR_nrf24l01.h"

#ifdef GNUC /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf set to 'Yes') calls __io_putchar() */ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #define GETCHAR_PROTOTYPE int fgetc(FILE f) #endif / GNUC / PUTCHAR_PROTOTYPE { / Place your implementation of fputc here / / e.g. write a character to the USART / HAL_UART_Transmit(&huart1, (uint8_t)&ch,1,100);

/* Loop until the end of transmission */

return ch; }

uint8_t CTR_SENDBUFF[32]; //Hung CTR_nrfInit(); //khoi tao CTR_nrfSetTX(); //chon chuc nang gui du lieu // Them doan ma can gui vao buffer gui sprintf(CTR_SENDBUFF, "Hello Hung-gui qua NRF24L01");

printf("Hello day la mach phat dung NRF24L01\r \n");

while (1) { /* USER CODE END WHILE */ HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);

// if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13) == 1){ printf("Sending package to receiver \r \n"); CTR_nrfSendPacket(CTR_SENDBUFF); CTR_nrfSetTX(); // } else{ // printf("Idling. Not sending any package\r \n"); // }

	HAL_Delay(1000);

/* USER CODE BEGIN 3 */

}

---

add CTR_nrfPinConfig(); to MX_GPIO_Init

Then Compile and Load to your MCU

Note: I use STLINK Mini to load code to MCU