/** * Copyright (c) 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. * */ #include #include #include #include "nrf.h" #include "nrf_drv_clock.h" #include "nrf_gpio.h" #include "nrf_delay.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_serial.h" #include "app_timer.h" #include "app_error.h" #include "app_util.h" #include "boards.h" /** @file * @defgroup nrf_serial_uartes_example main.c * @{ * @ingroup nrf_serial_uartes_example * @brief Example of @ref nrf_serial usage. Loopback example using two UARTE peripherals. * Please short Arduino SCL and SDA GPIOs to start transmission. * */ #define OP_QUEUES_SIZE 3 #define APP_TIMER_PRESCALER NRF_SERIAL_APP_TIMER_PRESCALER static void sleep_handler(void) { __WFE(); __SEV(); __WFE(); } NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uarte0_drv_config, RX_PIN_NUMBER, ARDUINO_SCL_PIN, RTS_PIN_NUMBER, CTS_PIN_NUMBER, NRF_UART_HWFC_DISABLED, NRF_UART_PARITY_EXCLUDED, NRF_UART_BAUDRATE_115200, UART_DEFAULT_CONFIG_IRQ_PRIORITY); NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uarte1_drv_config, ARDUINO_SDA_PIN, TX_PIN_NUMBER, RTS_PIN_NUMBER, CTS_PIN_NUMBER, NRF_UART_HWFC_DISABLED, NRF_UART_PARITY_EXCLUDED, NRF_UART_BAUDRATE_115200, UART_DEFAULT_CONFIG_IRQ_PRIORITY); #define SERIAL_FIFO_TX_SIZE 32 #define SERIAL_FIFO_RX_SIZE 32 NRF_SERIAL_QUEUES_DEF(serial0_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE); NRF_SERIAL_QUEUES_DEF(serial1_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE); #define SERIAL_BUFF_TX_SIZE 1 #define SERIAL_BUFF_RX_SIZE 1 NRF_SERIAL_BUFFERS_DEF(serial0_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE); NRF_SERIAL_BUFFERS_DEF(serial1_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE); NRF_SERIAL_CONFIG_DEF(serial0_config, NRF_SERIAL_MODE_DMA, &serial0_queues, &serial0_buffs, NULL, sleep_handler); NRF_SERIAL_CONFIG_DEF(serial1_config, NRF_SERIAL_MODE_DMA, &serial1_queues, &serial1_buffs, NULL, sleep_handler); NRF_SERIAL_UART_DEF(serial0_uarte, 0); NRF_SERIAL_UART_DEF(serial1_uarte, 1); static void uart_test(int test_num) { ret_code_t ret; ret = nrf_serial_init(&serial0_uarte, &m_uarte0_drv_config, &serial0_config); APP_ERROR_CHECK(ret); ret = nrf_serial_init(&serial1_uarte, &m_uarte1_drv_config, &serial1_config); APP_ERROR_CHECK(ret); static char tx_message[40]; snprintf(tx_message, sizeof(tx_message), "Hello nrf_serial! Test %d\n\r", test_num); ret = nrf_serial_write(&serial1_uarte, tx_message, strlen(tx_message), NULL, NRF_SERIAL_MAX_TIMEOUT); (void)nrf_serial_flush(&serial1_uarte, 0); int i = 0; while (true) { if(++i > 2) break; // break out after 10 timeouts (seconds) char c; ret = nrf_serial_read(&serial0_uarte, &c, sizeof(c), NULL, 1000); if (ret != NRF_SUCCESS) { continue; } (void)nrf_serial_write(&serial0_uarte, &c, sizeof(c), NULL, 0); (void)nrf_serial_flush(&serial0_uarte, 0); ret = nrf_serial_read(&serial1_uarte, &c, sizeof(c), NULL, 1000); if (ret != NRF_SUCCESS) { continue; } (void)nrf_serial_write(&serial1_uarte, &c, sizeof(c), NULL, 0); (void)nrf_serial_flush(&serial1_uarte, 0); } // Disable UART to reduce current consumption nrf_serial_uninit(&serial0_uarte); nrf_serial_uninit(&serial1_uarte); // Workaround by disabling the UART peripherals *(volatile uint32_t *)0x40002FFC = 0; // Power down UARTE0 *(volatile uint32_t *)0x40002FFC; // *(volatile uint32_t *)0x40002FFC = 1; // Power on UARTE0 so it is ready for next time *(volatile uint32_t *)0x40028FFC = 0; // Power down UARTE1 *(volatile uint32_t *)0x40028FFC; // *(volatile uint32_t *)0x40028FFC = 1; // Power on UARTE1 so it is ready for next time } int main(void) { ret_code_t ret; ret = nrf_drv_clock_init(); APP_ERROR_CHECK(ret); nrf_drv_clock_lfclk_request(NULL); ret = app_timer_init(); APP_ERROR_CHECK(ret); uart_test(0); uart_test(1); // Enter low power mode while (true) { __SEV(); __WFE(); __WFE(); } } /** @} */