SPI of NRF51822

1 /** @brief Function for initializing a SPI master driver.2  *3 * @param [in] p_instance Pointer to SPI Master driver instance.4  */5 Static voidSpi_master_init (nrf_drv_spi_tConst*p_instance)6 {7uint32_t Err_code =nrf_success;8      9nrf_drv_spi_config_t config =Ten     { One   A. irq_priority =App_irq_priority_low, -. Orc =0x80, -. Frequency =nrf_drv_spi_freq_1m, the. Mode =Nrf_drv_spi_mode_0, -. Bit_order =Nrf_drv_spi_bit_order_msb_first, -     }; -  +     #if(spi0_enabled = = 1) -     if(P_instance = = &m_spi_master_0) +     { AConfig.ss_pin =Spim0_ss_pin, atConfig.sck_pin =Spim0_sck_pin; -Config.mosi_pin =Spim0_mosi_pin; -Config.miso_pin =Spim0_miso_pin; -Err_code =Nrf_drv_spi_init (p_instance, -&Config, - Spi_master_0_event_handler); in     } -     Else to     #endif //(spi0_enabled = = 1) +  - App_error_check (err_code); the}

1 uint8_t Spi_write_reg (uint8_t ucregaddr, uint8_t ucregval)2 {3uint8_t buf[2];4 uint32_t Err_code;5     6Spi_xfer_done =false;7     8buf[0] = ucregaddr<<1;9buf[1] =Ucregval;Ten  OneErr_code = Nrf_drv_spi_transfer (&m_spi_master_0, buf,2Null0); A App_error_check (err_code); -      -      while(!Spi_xfer_done) the     { - __wfe (); -     } -     return true; + } -  +  A uint8_t Spi_read_reg (uint8_t ucregaddr) at { -uint8_t buf[2]; -uint8_t rx[2]; - uint32_t Err_code; -      -Spi_xfer_done =false; in      -buf[0] = (ucregaddr<<1) |0x80; tobuf[1] =0x00; +      -Err_code = Nrf_drv_spi_transfer (&m_spi_master_0,buf,2Rx2); the App_error_check (err_code); *      $      while(!Spi_xfer_done)Panax Notoginseng     { - __wfe (); the     } +      A     returnrx[1]; the}

Now we are testing the Spi_write_reg (uint8_t ucregaddr, uint8_t ucregval)

More according to our code in Saleae Logic 1.1.16C set as shown in

What does not understand the above configuration? Please turn right to the lesson http://www.cnblogs.com/libra13179/p/5740716.html

Spi_write_reg (0x00,0x00)

Spi_write_reg (0x01,0x02) deliberately leave a thought? Why is 0x02 not 0x01, and what does it do?

SPI of NRF51822