标题: NRF51822的一个串口通信例程源码 [打印本页]
作者: q745904106    时间: 2018-10-15 17:36
标题: NRF51822的一个串口通信例程源码
NRF51822的一个串口通信例程

单片机源程序如下:
  1. /* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.
  2. *
  3. * The information contained herein is property of Nordic Semiconductor ASA.
  4. * Terms and conditions of usage are described in detail in NORDIC
  5. * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
  6. *
  7. * Licensees are granted free, non-transferable use of the information. NO
  8. * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
  9. * the file.
  10. *
  11. */

  13. #include <stdint.h>

  15. #include "nrf.h"
  16. #include "simple_uart.h"
  17. #include "nrf_delay.h"
  18. #include "nrf_gpio.h"

  20. uint8_t simple_uart_get(void)
  21. {
  22.   while (NRF_UART0->EVENTS_RXDRDY != 1)
  23.   {
  24.     // Wait for RXD data to be received
  25.   }
  26.   
  27.   NRF_UART0->EVENTS_RXDRDY = 0;
  28.   return (uint8_t)NRF_UART0->RXD;
  29. }

  31. bool simple_uart_get_with_timeout(int32_t timeout_ms, uint8_t *rx_data)
  32. {
  33.   bool ret = true;
  34.   
  35.   while (NRF_UART0->EVENTS_RXDRDY != 1)
  36.   {
  37.     if (timeout_ms-- >= 0)
  38.     {
  39.       // wait in 1ms chunk before checking for status
  40.       nrf_delay_us(1000);
  41.     }
  42.     else
  43.     {
  44.       ret = false;
  45.       break;
  46.     }
  47.   }  // Wait for RXD data to be received

  49.   if (timeout_ms >= 0)
  50.   {
  51.     // clear the event and set rx_data with received byte
  52.       NRF_UART0->EVENTS_RXDRDY = 0;
  53.       *rx_data = (uint8_t)NRF_UART0->RXD;
  54.   }

  56.   return ret;
  57. }

  59. void simple_uart_put(uint8_t cr)
  60. {
  61.   NRF_UART0->TXD = (uint8_t)cr;

  63.   while (NRF_UART0->EVENTS_TXDRDY!=1)
  64.   {
  65.     // Wait for TXD data to be sent
  66.   }

  68.   NRF_UART0->EVENTS_TXDRDY=0;
  69. }

  71. void simple_uart_putstring(const uint8_t *str)
  72. {
  73.   uint_fast8_t i = 0;
  74.   uint8_t ch = str[i++];
  75.   while (ch != '\0')
  76.   {
  77.     simple_uart_put(ch);
  78.     ch = str[i++];
  79.   }
  80. }

  82. void simple_uart_config(  uint8_t rts_pin_number,
  83.                           uint8_t txd_pin_number,
  84.                           uint8_t cts_pin_number,
  85.                           uint8_t rxd_pin_number,
  86.                           bool    hwfc)
  87. {
  88. /** @snippet [Configure UART RX and TX pin] */
  89.   nrf_gpio_cfg_output(txd_pin_number);
  90.   nrf_gpio_cfg_input(rxd_pin_number, NRF_GPIO_PIN_NOPULL);  

  92.   NRF_UART0->PSELTXD = txd_pin_number;
  93.   NRF_UART0->PSELRXD = rxd_pin_number;
  94. /** @snippet [Configure UART RX and TX pin] */
  95.   if (hwfc)
  96.   {
  97.     nrf_gpio_cfg_output(rts_pin_number);
  98.     nrf_gpio_cfg_input(cts_pin_number, NRF_GPIO_PIN_NOPULL);
  99.     NRF_UART0->PSELCTS = cts_pin_number;
  100.     NRF_UART0->PSELRTS = rts_pin_number;
  101.     NRF_UART0->CONFIG  = (UART_CONFIG_HWFC_Enabled << UART_CONFIG_HWFC_Pos);
  102.   }

  104.   NRF_UART0->BAUDRATE         = (UART_BAUDRATE_BAUDRATE_Baud115200 << UART_BAUDRATE_BAUDRATE_Pos);
  105.   NRF_UART0->ENABLE           = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);
  106.   NRF_UART0->TASKS_STARTTX    = 1;
  107.   NRF_UART0->TASKS_STARTRX    = 1;
  108.   NRF_UART0->EVENTS_RXDRDY    = 0;
  109. }



  113. /**********************************************
  114. * 函数功能：串口处理
  115. * 入口参数：无
  116. * 返回值：无
  117. **********************************************/
  118. void Usart_Pro(void)
  119. {
  120.         simple_uart_putstring("123456\r\n");
  121. }


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NRF51822_USART.7z (321.13 KB, 下载次数: 39)


作者: cnc202    时间: 2018-12-27 22:02
good job



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