NRF52832 RNG

1.在sdk_config.h中加入宏 // RNG_ENABLED - nrf_drv_rng - RNG peripheral driver - legacy layer //========================================================== #ifndef RNG_ENABLED #define RNG_ENABLED 1 #endif

#ifndef RNG_CONFIG_ERROR_CORRECTION #define RNG_CONFIG_ERROR_CORRECTION 1 #endif

// RNG_CONFIG_POOL_SIZE - Pool size  #ifndef RNG_CONFIG_POOL_SIZE #define RNG_CONFIG_POOL_SIZE 64 #endif

// RNG_CONFIG_IRQ_PRIORITY  - Interrupt priority  

// Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice // 0 (highest)  // 1  // 2  // 3  // 4  // 5  // 6  // 7 

#ifndef RNG_CONFIG_IRQ_PRIORITY #define RNG_CONFIG_IRQ_PRIORITY 6 #endif // NRFX_RNG_ENABLED - nrfx_rng - RNG peripheral driver //========================================================== #ifndef NRFX_RNG_ENABLED #define NRFX_RNG_ENABLED 1 #endif // NRFX_RNG_CONFIG_ERROR_CORRECTION  - Error correction #ifndef NRFX_RNG_CONFIG_ERROR_CORRECTION #define NRFX_RNG_CONFIG_ERROR_CORRECTION 1 #endif

// NRFX_RNG_CONFIG_IRQ_PRIORITY  - Interrupt priority   // 0 (highest)  // 1  // 2  // 3  // 4  // 5  // 6  // 7 

#ifndef NRFX_RNG_CONFIG_IRQ_PRIORITY #define NRFX_RNG_CONFIG_IRQ_PRIORITY 6 #endif

// NRFX_RNG_CONFIG_LOG_ENABLED - Enables logging in the module. //========================================================== #ifndef NRFX_RNG_CONFIG_LOG_ENABLED #define NRFX_RNG_CONFIG_LOG_ENABLED 0 #endif // NRFX_RNG_CONFIG_LOG_LEVEL  - Default Severity level   // Off  // Error  // Warning  // Info  // Debug 

#ifndef NRFX_RNG_CONFIG_LOG_LEVEL #define NRFX_RNG_CONFIG_LOG_LEVEL 3 #endif

// NRFX_RNG_CONFIG_INFO_COLOR  - ANSI escape code prefix.   // Default  // Black  // Red  // Green  // Yellow  // Blue  // Magenta  // Cyan  // White 

#ifndef NRFX_RNG_CONFIG_INFO_COLOR #define NRFX_RNG_CONFIG_INFO_COLOR 0 #endif

// NRFX_RNG_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.   // Default  // Black  // Red  // Green  // Yellow  // Blue  // Magenta  // Cyan  // White 

#ifndef NRFX_RNG_CONFIG_DEBUG_COLOR #define NRFX_RNG_CONFIG_DEBUG_COLOR 0 #endif // NRF_QUEUE_ENABLED - nrf_queue - Queue module //========================================================== #ifndef NRF_QUEUE_ENABLED #define NRF_QUEUE_ENABLED 1 #endif // NRF_QUEUE_CLI_CMDS  - Enable CLI commands specific to the module  

#ifndef NRF_QUEUE_CLI_CMDS #define NRF_QUEUE_CLI_CMDS 0 #endif

2.导入nrfx_rng.c,nrf_drv_rng.c,nrf_ringbuf.c,nrf_queue.c到工程

3.引入头文件

#include "nrf_drv_rng.h"

4.定义一个随机产生函数

#define RANDOM_BUFF_SIZE    16      /**< Random numbers buffer size. */

/** @brief Function for getting vector of random numbers.  *  * @param[out] p_buff       Pointer to unit8_t buffer for storing the bytes.  * @param[in]  length       Number of bytes to take from pool and place in p_buff.  *  * @retval     Number of bytes actually placed in p_buff.  */ static uint8_t random_vector_generate(uint8_t * p_buff, uint8_t size) {     uint32_t err_code;     uint8_t  available;

    nrf_drv_rng_bytes_available(&available); // nction for getting the number of currently available random bytes.                                              // Parameters                                             //[out]    p_bytes_available    The number of bytes currently available in the pool.     uint8_t length = MIN(size, available);  //得到最小长度

    err_code = nrf_drv_rng_rand(p_buff, length); // Function for getting the vector of random numbers.                                                  //   Parameters                                                 //  [out]    p_buff    Pointer to uint8_t buffer for storing the bytes.                                                 //  [in]    length    Number of bytes to take from the pool and place in p_buff.                                                 //  Return values                                                 //  NRF_SUCCESS    If the requested bytes were written to p_buff.                                                 //  NRF_ERROR_NOT_FOUND    If no bytes were written to the buffer because there were not enough bytes available in the pool.     APP_ERROR_CHECK(err_code);

    return length; }

5.在主函数中处理

/**  * @brief Function for main application entry.  */ int main(void) {     uint32_t err_code;

    bsp_board_init(BSP_INIT_LEDS);

    const app_uart_comm_params_t comm_params =       {           RX_PIN_NUMBER,           TX_PIN_NUMBER,           RTS_PIN_NUMBER,           CTS_PIN_NUMBER,           UART_HWFC,           false, #if defined (UART_PRESENT)           NRF_UART_BAUDRATE_115200 #else           NRF_UARTE_BAUDRATE_115200 #endif       };

    APP_UART_FIFO_INIT(&comm_params,                          UART_RX_BUF_SIZE,                          UART_TX_BUF_SIZE,                          uart_error_handle,                          APP_IRQ_PRIORITY_LOWEST,                          err_code);

    APP_ERROR_CHECK(err_code);

     err_code = nrf_drv_rng_init(NULL);  // Function for initializing the nrf_drv_rng module.                                          // Parameters                                          // [in]    p_config    Initial configuration.                                          // Return values                                          // NRF_SUCCESS    Driver was successfully initialized.                                         //  NRF_ERROR_MODULE_ALREADY_INITIALIZED    Driver was already initialized.

    APP_ERROR_CHECK(err_code);

    while (true)     {        uint8_t p_buff[RANDOM_BUFF_SIZE];         uint8_t length = random_vector_generate(p_buff,RANDOM_BUFF_SIZE);        printf("Random Vector:");         for(int i=0;i