114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/**
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* Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_config.h"
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#include "nrf_drv_spis.h"
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#include "nrf_gpio.h"
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#include "boards.h"
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#include "app_error.h"
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#include <string.h>
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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#define SPIS_INSTANCE 1 /**< SPIS instance index. */
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static const nrf_drv_spis_t spis = NRF_DRV_SPIS_INSTANCE(SPIS_INSTANCE);/**< SPIS instance. */
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#define TEST_STRING "Nordic"
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static uint8_t m_tx_buf[] = TEST_STRING; /**< TX buffer. */
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static uint8_t m_rx_buf[sizeof(TEST_STRING) + 1]; /**< RX buffer. */
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static const uint8_t m_length = sizeof(m_tx_buf); /**< Transfer length. */
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static volatile bool spis_xfer_done; /**< Flag used to indicate that SPIS instance completed the transfer. */
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/**
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* @brief SPIS user event handler.
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*
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* @param event
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*/
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void spis_event_handler(nrf_drv_spis_event_t event)
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{
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if (event.evt_type == NRF_DRV_SPIS_XFER_DONE)
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{
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spis_xfer_done = true;
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NRF_LOG_INFO(" Transfer completed. Received: %s",(uint32_t)m_rx_buf);
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}
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}
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int main(void)
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{
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// Enable the constant latency sub power mode to minimize the time it takes
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// for the SPIS peripheral to become active after the CSN line is asserted
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// (when the CPU is in sleep mode).
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NRF_POWER->TASKS_CONSTLAT = 1;
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bsp_board_init(BSP_INIT_LEDS);
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APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
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NRF_LOG_DEFAULT_BACKENDS_INIT();
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NRF_LOG_INFO("SPIS example");
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nrf_drv_spis_config_t spis_config = NRF_DRV_SPIS_DEFAULT_CONFIG;
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spis_config.csn_pin = APP_SPIS_CS_PIN;
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spis_config.miso_pin = APP_SPIS_MISO_PIN;
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spis_config.mosi_pin = APP_SPIS_MOSI_PIN;
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spis_config.sck_pin = APP_SPIS_SCK_PIN;
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APP_ERROR_CHECK(nrf_drv_spis_init(&spis, &spis_config, spis_event_handler));
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while (1)
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{
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memset(m_rx_buf, 0, m_length);
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spis_xfer_done = false;
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APP_ERROR_CHECK(nrf_drv_spis_buffers_set(&spis, m_tx_buf, m_length, m_rx_buf, m_length));
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while (!spis_xfer_done)
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{
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__WFE();
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}
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NRF_LOG_FLUSH();
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bsp_board_led_invert(BSP_BOARD_LED_0);
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}
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}
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