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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/uart/main.c')
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1 files changed, 196 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/uart/main.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/uart/main.c new file mode 100644 index 0000000..60bc836 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/examples/peripheral/uart/main.c @@ -0,0 +1,196 @@ +/** + * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +/** @file + * @defgroup uart_example_main main.c + * @{ + * @ingroup uart_example + * @brief UART Example Application main file. + * + * This file contains the source code for a sample application using UART. + * + */ + +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include "app_uart.h" +#include "app_error.h" +#include "nrf_delay.h" +#include "nrf.h" +#include "bsp.h" +#if defined (UART_PRESENT) +#include "nrf_uart.h" +#endif +#if defined (UARTE_PRESENT) +#include "nrf_uarte.h" +#endif + + +//#define ENABLE_LOOPBACK_TEST /**< if defined, then this example will be a loopback test, which means that TX should be connected to RX to get data loopback. */ + +#define MAX_TEST_DATA_BYTES (15U) /**< max number of test bytes to be used for tx and rx. */ +#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */ +#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */ + +void uart_error_handle(app_uart_evt_t * p_event) +{ + if (p_event->evt_type == APP_UART_COMMUNICATION_ERROR) + { + APP_ERROR_HANDLER(p_event->data.error_communication); + } + else if (p_event->evt_type == APP_UART_FIFO_ERROR) + { + APP_ERROR_HANDLER(p_event->data.error_code); + } +} + + +#ifdef ENABLE_LOOPBACK_TEST +/* Use flow control in loopback test. */ +#define UART_HWFC APP_UART_FLOW_CONTROL_ENABLED + +/** @brief Function for setting the @ref ERROR_PIN high, and then enter an infinite loop. + */ +static void show_error(void) +{ + + bsp_board_leds_on(); + while (true) + { + // Do nothing. + } +} + + +/** @brief Function for testing UART loop back. + * @details Transmitts one character at a time to check if the data received from the loopback is same as the transmitted data. + * @note @ref TX_PIN_NUMBER must be connected to @ref RX_PIN_NUMBER) + */ +static void uart_loopback_test() +{ + uint8_t * tx_data = (uint8_t *)("\r\nLOOPBACK_TEST\r\n"); + uint8_t rx_data; + + // Start sending one byte and see if you get the same + for (uint32_t i = 0; i < MAX_TEST_DATA_BYTES; i++) + { + uint32_t err_code; + while (app_uart_put(tx_data[i]) != NRF_SUCCESS); + + nrf_delay_ms(10); + err_code = app_uart_get(&rx_data); + + if ((rx_data != tx_data[i]) || (err_code != NRF_SUCCESS)) + { + show_error(); + } + } + return; +} +#else +/* When UART is used for communication with the host do not use flow control.*/ +#define UART_HWFC APP_UART_FLOW_CONTROL_DISABLED +#endif + + +/** + * @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); + +#ifndef ENABLE_LOOPBACK_TEST + printf("\r\nUART example started.\r\n"); + + while (true) + { + uint8_t cr; + while (app_uart_get(&cr) != NRF_SUCCESS); + while (app_uart_put(cr) != NRF_SUCCESS); + + if (cr == 'q' || cr == 'Q') + { + printf(" \r\nExit!\r\n"); + + while (true) + { + // Do nothing. + } + } + } +#else + + // This part of the example is just for testing the loopback . + while (true) + { + uart_loopback_test(); + } +#endif +} + + +/** @} */ |