Lee Kai Xuan
mbed-os
Fork of
mbed-os
by 
erkin yucel
targets/TARGET_NORDIC/TARGET_NRF5/serial_api.c@1:3deb71413561, 2017-07-20 (annotated)
- Committer:
- xuaner
- Date:
- Thu Jul 20 14:26:57 2017 +0000
- Revision:
- 1:3deb71413561
- Parent:
- 0:f269e3021894
mbed_os
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| elessair | 0:f269e3021894 | 1 | /* |
| elessair | 0:f269e3021894 | 2 | * Copyright (c) 2013 Nordic Semiconductor ASA |
| elessair | 0:f269e3021894 | 3 | * All rights reserved. |
| elessair | 0:f269e3021894 | 4 | * |
| elessair | 0:f269e3021894 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
| elessair | 0:f269e3021894 | 6 | * are permitted provided that the following conditions are met: |
| elessair | 0:f269e3021894 | 7 | * |
| elessair | 0:f269e3021894 | 8 | * 1. Redistributions of source code must retain the above copyright notice, this list |
| elessair | 0:f269e3021894 | 9 | * of conditions and the following disclaimer. |
| elessair | 0:f269e3021894 | 10 | * |
| elessair | 0:f269e3021894 | 11 | * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA |
| elessair | 0:f269e3021894 | 12 | * integrated circuit in a product or a software update for such product, must reproduce |
| elessair | 0:f269e3021894 | 13 | * the above copyright notice, this list of conditions and the following disclaimer in |
| elessair | 0:f269e3021894 | 14 | * the documentation and/or other materials provided with the distribution. |
| elessair | 0:f269e3021894 | 15 | * |
| elessair | 0:f269e3021894 | 16 | * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be |
| elessair | 0:f269e3021894 | 17 | * used to endorse or promote products derived from this software without specific prior |
| elessair | 0:f269e3021894 | 18 | * written permission. |
| elessair | 0:f269e3021894 | 19 | * |
| elessair | 0:f269e3021894 | 20 | * 4. This software, with or without modification, must only be used with a |
| elessair | 0:f269e3021894 | 21 | * Nordic Semiconductor ASA integrated circuit. |
| elessair | 0:f269e3021894 | 22 | * |
| elessair | 0:f269e3021894 | 23 | * 5. Any software provided in binary or object form under this license must not be reverse |
| elessair | 0:f269e3021894 | 24 | * engineered, decompiled, modified and/or disassembled. |
| elessair | 0:f269e3021894 | 25 | * |
| elessair | 0:f269e3021894 | 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| elessair | 0:f269e3021894 | 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| elessair | 0:f269e3021894 | 28 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| elessair | 0:f269e3021894 | 29 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| elessair | 0:f269e3021894 | 30 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| elessair | 0:f269e3021894 | 31 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| elessair | 0:f269e3021894 | 32 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| elessair | 0:f269e3021894 | 33 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| elessair | 0:f269e3021894 | 34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| elessair | 0:f269e3021894 | 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| elessair | 0:f269e3021894 | 36 | * |
| elessair | 0:f269e3021894 | 37 | */ |
| elessair | 0:f269e3021894 | 38 | |
| elessair | 0:f269e3021894 | 39 | #include "serial_api.h" |
| elessair | 0:f269e3021894 | 40 | |
| elessair | 0:f269e3021894 | 41 | #if DEVICE_SERIAL |
| elessair | 0:f269e3021894 | 42 | |
| elessair | 0:f269e3021894 | 43 | #include <string.h> |
| elessair | 0:f269e3021894 | 44 | #include "mbed_assert.h" |
| elessair | 0:f269e3021894 | 45 | #include "mbed_error.h" |
| elessair | 0:f269e3021894 | 46 | #include "nrf_uart.h" |
| elessair | 0:f269e3021894 | 47 | #include "nrf_drv_common.h" |
| elessair | 0:f269e3021894 | 48 | #include "nrf_drv_config.h" |
| elessair | 0:f269e3021894 | 49 | #include "app_util_platform.h" |
| elessair | 0:f269e3021894 | 50 | #include "nrf_gpio.h" |
| elessair | 0:f269e3021894 | 51 | |
| elessair | 0:f269e3021894 | 52 | #define UART_INSTANCE_COUNT 1 |
| elessair | 0:f269e3021894 | 53 | #define UART_INSTANCE NRF_UART0 |
| elessair | 0:f269e3021894 | 54 | #define UART_IRQn UART0_IRQn |
| elessair | 0:f269e3021894 | 55 | #define UART_IRQ_HANDLER UART0_IRQHandler |
| elessair | 0:f269e3021894 | 56 | #define UART_INSTANCE_ID 0 |
| elessair | 0:f269e3021894 | 57 | #define UART_CB uart_cb[UART_INSTANCE_ID] |
| elessair | 0:f269e3021894 | 58 | |
| elessair | 0:f269e3021894 | 59 | #define UART_DEFAULT_BAUDRATE UART0_CONFIG_BAUDRATE |
| elessair | 0:f269e3021894 | 60 | #define UART_DEFAULT_PARITY UART0_CONFIG_PARITY |
| elessair | 0:f269e3021894 | 61 | |
| elessair | 0:f269e3021894 | 62 | // expected the macro from mbed configuration system |
| elessair | 0:f269e3021894 | 63 | #ifndef MBED_CONF_NORDIC_UART_HWFC |
| elessair | 0:f269e3021894 | 64 | #define MBED_CONF_NORDIC_UART_HWFC 1 |
| elessair | 0:f269e3021894 | 65 | #warning None of UART flow control configuration (expected macro MBED_CONF_NORDIC_UART_HWFC). The RTSCTS flow control is used by default . |
| elessair | 0:f269e3021894 | 66 | #endif |
| elessair | 0:f269e3021894 | 67 | |
| elessair | 0:f269e3021894 | 68 | #if MBED_CONF_NORDIC_UART_HWFC == 1 |
| elessair | 0:f269e3021894 | 69 | #define UART_DEFAULT_HWFC UART0_CONFIG_HWFC |
| elessair | 0:f269e3021894 | 70 | #else |
| elessair | 0:f269e3021894 | 71 | #define UART_DEFAULT_HWFC NRF_UART_HWFC_DISABLED |
| elessair | 0:f269e3021894 | 72 | #endif |
| elessair | 0:f269e3021894 | 73 | |
| elessair | 0:f269e3021894 | 74 | #define UART_DEFAULT_CTS UART0_CONFIG_PSEL_CTS |
| elessair | 0:f269e3021894 | 75 | #define UART_DEFAULT_RTS UART0_CONFIG_PSEL_RTS |
| elessair | 0:f269e3021894 | 76 | |
| elessair | 0:f269e3021894 | 77 | // Required by "retarget.cpp". |
| elessair | 0:f269e3021894 | 78 | int stdio_uart_inited = 0; |
| elessair | 0:f269e3021894 | 79 | serial_t stdio_uart; |
| elessair | 0:f269e3021894 | 80 | |
| elessair | 0:f269e3021894 | 81 | typedef struct { |
| elessair | 0:f269e3021894 | 82 | bool initialized; |
| elessair | 0:f269e3021894 | 83 | uint32_t irq_context; |
| elessair | 0:f269e3021894 | 84 | uart_irq_handler irq_handler; |
| elessair | 0:f269e3021894 | 85 | |
| elessair | 0:f269e3021894 | 86 | uint32_t pselrxd; |
| elessair | 0:f269e3021894 | 87 | uint32_t pseltxd; |
| elessair | 0:f269e3021894 | 88 | uint32_t pselcts; |
| elessair | 0:f269e3021894 | 89 | uint32_t pselrts; |
| elessair | 0:f269e3021894 | 90 | nrf_uart_hwfc_t hwfc; |
| elessair | 0:f269e3021894 | 91 | nrf_uart_parity_t parity; |
| elessair | 0:f269e3021894 | 92 | nrf_uart_baudrate_t baudrate; |
| elessair | 0:f269e3021894 | 93 | |
| elessair | 0:f269e3021894 | 94 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 95 | bool volatile rx_active; |
| elessair | 0:f269e3021894 | 96 | uint8_t *rx_buffer; |
| elessair | 0:f269e3021894 | 97 | size_t rx_length; |
| elessair | 0:f269e3021894 | 98 | size_t rx_pos; |
| elessair | 0:f269e3021894 | 99 | void (*rx_asynch_handler)(); |
| elessair | 0:f269e3021894 | 100 | uint8_t char_match; |
| elessair | 0:f269e3021894 | 101 | |
| elessair | 0:f269e3021894 | 102 | bool volatile tx_active; |
| elessair | 0:f269e3021894 | 103 | const uint8_t *tx_buffer; |
| elessair | 0:f269e3021894 | 104 | size_t tx_length; |
| elessair | 0:f269e3021894 | 105 | size_t tx_pos; |
| elessair | 0:f269e3021894 | 106 | void (*tx_asynch_handler)(); |
| elessair | 0:f269e3021894 | 107 | |
| elessair | 0:f269e3021894 | 108 | uint32_t events_wanted; |
| elessair | 0:f269e3021894 | 109 | uint32_t events_occured; |
| elessair | 0:f269e3021894 | 110 | |
| elessair | 0:f269e3021894 | 111 | #define UART_IRQ_TX 1 |
| elessair | 0:f269e3021894 | 112 | #define UART_IRQ_RX 2 |
| elessair | 0:f269e3021894 | 113 | uint8_t irq_enabled; |
| elessair | 0:f269e3021894 | 114 | #endif // DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 115 | } uart_ctlblock_t; |
| elessair | 0:f269e3021894 | 116 | |
| elessair | 0:f269e3021894 | 117 | static uart_ctlblock_t uart_cb[UART_INSTANCE_COUNT]; |
| elessair | 0:f269e3021894 | 118 | |
| elessair | 0:f269e3021894 | 119 | static void internal_set_hwfc(FlowControl type, |
| elessair | 0:f269e3021894 | 120 | PinName rxflow, PinName txflow); |
| elessair | 0:f269e3021894 | 121 | |
| elessair | 0:f269e3021894 | 122 | |
| elessair | 0:f269e3021894 | 123 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 124 | static void end_asynch_rx(void) |
| elessair | 0:f269e3021894 | 125 | { |
| elessair | 0:f269e3021894 | 126 | // If RX interrupt is activated for synchronous operations, |
| elessair | 0:f269e3021894 | 127 | // don't disable it, just stop handling it here. |
| elessair | 0:f269e3021894 | 128 | if (!(UART_CB.irq_enabled & UART_IRQ_RX)) { |
| elessair | 0:f269e3021894 | 129 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
| elessair | 0:f269e3021894 | 130 | } |
| elessair | 0:f269e3021894 | 131 | UART_CB.rx_active = false; |
| elessair | 0:f269e3021894 | 132 | } |
| elessair | 0:f269e3021894 | 133 | static void end_asynch_tx(void) |
| elessair | 0:f269e3021894 | 134 | { |
| elessair | 0:f269e3021894 | 135 | // If TX interrupt is activated for synchronous operations, |
| elessair | 0:f269e3021894 | 136 | // don't disable it, just stop handling it here. |
| elessair | 0:f269e3021894 | 137 | if (!(UART_CB.irq_enabled & UART_IRQ_TX)) { |
| elessair | 0:f269e3021894 | 138 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
| elessair | 0:f269e3021894 | 139 | } |
| elessair | 0:f269e3021894 | 140 | UART_CB.tx_active = false; |
| elessair | 0:f269e3021894 | 141 | } |
| elessair | 0:f269e3021894 | 142 | #endif // DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 143 | |
| elessair | 0:f269e3021894 | 144 | void UART_IRQ_HANDLER(void) |
| elessair | 0:f269e3021894 | 145 | { |
| elessair | 0:f269e3021894 | 146 | if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY) && |
| elessair | 0:f269e3021894 | 147 | nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)) { |
| elessair | 0:f269e3021894 | 148 | |
| elessair | 0:f269e3021894 | 149 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 150 | if (UART_CB.rx_active) { |
| elessair | 0:f269e3021894 | 151 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
| elessair | 0:f269e3021894 | 152 | |
| elessair | 0:f269e3021894 | 153 | uint8_t rx_data = nrf_uart_rxd_get(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 154 | UART_CB.rx_buffer[UART_CB.rx_pos] = rx_data; |
| elessair | 0:f269e3021894 | 155 | |
| elessair | 0:f269e3021894 | 156 | bool end_rx = false; |
| elessair | 0:f269e3021894 | 157 | // If character matching should be performed, check if the current |
| elessair | 0:f269e3021894 | 158 | // data matches the given one. |
| elessair | 0:f269e3021894 | 159 | if (UART_CB.char_match != SERIAL_RESERVED_CHAR_MATCH && |
| elessair | 0:f269e3021894 | 160 | rx_data == UART_CB.char_match) { |
| elessair | 0:f269e3021894 | 161 | // If it does, report the match and abort further receiving. |
| elessair | 0:f269e3021894 | 162 | UART_CB.events_occured |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
| elessair | 0:f269e3021894 | 163 | if (UART_CB.events_wanted & SERIAL_EVENT_RX_CHARACTER_MATCH) { |
| elessair | 0:f269e3021894 | 164 | end_rx = true; |
| elessair | 0:f269e3021894 | 165 | } |
| elessair | 0:f269e3021894 | 166 | } |
| elessair | 0:f269e3021894 | 167 | if (++UART_CB.rx_pos >= UART_CB.rx_length) { |
| elessair | 0:f269e3021894 | 168 | UART_CB.events_occured |= SERIAL_EVENT_RX_COMPLETE; |
| elessair | 0:f269e3021894 | 169 | end_rx = true; |
| elessair | 0:f269e3021894 | 170 | } |
| elessair | 0:f269e3021894 | 171 | if (end_rx) { |
| elessair | 0:f269e3021894 | 172 | end_asynch_rx(); |
| elessair | 0:f269e3021894 | 173 | |
| elessair | 0:f269e3021894 | 174 | if (UART_CB.rx_asynch_handler) { |
| elessair | 0:f269e3021894 | 175 | // Use local variable to make it possible to start a next |
| elessair | 0:f269e3021894 | 176 | // transfer from callback routine. |
| elessair | 0:f269e3021894 | 177 | void (*handler)() = UART_CB.rx_asynch_handler; |
| elessair | 0:f269e3021894 | 178 | UART_CB.rx_asynch_handler = NULL; |
| elessair | 0:f269e3021894 | 179 | handler(); |
| elessair | 0:f269e3021894 | 180 | } |
| elessair | 0:f269e3021894 | 181 | } |
| elessair | 0:f269e3021894 | 182 | } |
| elessair | 0:f269e3021894 | 183 | else |
| elessair | 0:f269e3021894 | 184 | #endif |
| elessair | 0:f269e3021894 | 185 | |
| elessair | 0:f269e3021894 | 186 | if (UART_CB.irq_handler) { |
| elessair | 0:f269e3021894 | 187 | UART_CB.irq_handler(UART_CB.irq_context, RxIrq); |
| elessair | 0:f269e3021894 | 188 | } |
| elessair | 0:f269e3021894 | 189 | } |
| elessair | 0:f269e3021894 | 190 | |
| elessair | 0:f269e3021894 | 191 | if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY) && |
| elessair | 0:f269e3021894 | 192 | nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) { |
| elessair | 0:f269e3021894 | 193 | |
| elessair | 0:f269e3021894 | 194 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 195 | if (UART_CB.tx_active) { |
| elessair | 0:f269e3021894 | 196 | if (++UART_CB.tx_pos <= UART_CB.tx_length) { |
| elessair | 0:f269e3021894 | 197 | // When there is still something to send, clear the TXDRDY event |
| elessair | 0:f269e3021894 | 198 | // and put next byte to transmitter. |
| elessair | 0:f269e3021894 | 199 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
| elessair | 0:f269e3021894 | 200 | nrf_uart_txd_set(UART_INSTANCE, |
| elessair | 0:f269e3021894 | 201 | UART_CB.tx_buffer[UART_CB.tx_pos]); |
| elessair | 0:f269e3021894 | 202 | } |
| elessair | 0:f269e3021894 | 203 | else { |
| elessair | 0:f269e3021894 | 204 | // When the TXDRDY event is set after the last byte to be sent |
| elessair | 0:f269e3021894 | 205 | // has been passed to the transmitter, the job is done and TX |
| elessair | 0:f269e3021894 | 206 | // complete can be indicated. |
| elessair | 0:f269e3021894 | 207 | // Don't clear the TXDRDY event, it needs to remain set for the |
| elessair | 0:f269e3021894 | 208 | // 'serial_writable' function to work properly. |
| elessair | 0:f269e3021894 | 209 | end_asynch_tx(); |
| elessair | 0:f269e3021894 | 210 | |
| elessair | 0:f269e3021894 | 211 | UART_CB.events_occured |= SERIAL_EVENT_TX_COMPLETE; |
| elessair | 0:f269e3021894 | 212 | if (UART_CB.tx_asynch_handler) { |
| elessair | 0:f269e3021894 | 213 | // Use local variable to make it possible to start a next |
| elessair | 0:f269e3021894 | 214 | // transfer from callback routine. |
| elessair | 0:f269e3021894 | 215 | void (*handler)() = UART_CB.tx_asynch_handler; |
| elessair | 0:f269e3021894 | 216 | UART_CB.tx_asynch_handler = NULL; |
| elessair | 0:f269e3021894 | 217 | handler(); |
| elessair | 0:f269e3021894 | 218 | } |
| elessair | 0:f269e3021894 | 219 | } |
| elessair | 0:f269e3021894 | 220 | } |
| elessair | 0:f269e3021894 | 221 | else |
| elessair | 0:f269e3021894 | 222 | #endif |
| elessair | 0:f269e3021894 | 223 | |
| elessair | 0:f269e3021894 | 224 | if (UART_CB.irq_handler) { |
| elessair | 0:f269e3021894 | 225 | UART_CB.irq_handler(UART_CB.irq_context, TxIrq); |
| elessair | 0:f269e3021894 | 226 | } |
| elessair | 0:f269e3021894 | 227 | } |
| elessair | 0:f269e3021894 | 228 | |
| elessair | 0:f269e3021894 | 229 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 230 | if (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_ERROR)) { |
| elessair | 0:f269e3021894 | 231 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_ERROR); |
| elessair | 0:f269e3021894 | 232 | |
| elessair | 0:f269e3021894 | 233 | uint8_t errorsrc = nrf_uart_errorsrc_get_and_clear(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 234 | if (UART_CB.rx_asynch_handler) { |
| elessair | 0:f269e3021894 | 235 | UART_CB.events_occured |= SERIAL_EVENT_ERROR; |
| elessair | 0:f269e3021894 | 236 | if (errorsrc & NRF_UART_ERROR_PARITY_MASK) { |
| elessair | 0:f269e3021894 | 237 | UART_CB.events_occured |= SERIAL_EVENT_RX_PARITY_ERROR; |
| elessair | 0:f269e3021894 | 238 | } |
| elessair | 0:f269e3021894 | 239 | if (errorsrc & NRF_UART_ERROR_FRAMING_MASK) { |
| elessair | 0:f269e3021894 | 240 | UART_CB.events_occured |= SERIAL_EVENT_RX_FRAMING_ERROR; |
| elessair | 0:f269e3021894 | 241 | } |
| elessair | 0:f269e3021894 | 242 | if (errorsrc & NRF_UART_ERROR_OVERRUN_MASK) { |
| elessair | 0:f269e3021894 | 243 | UART_CB.events_occured |= SERIAL_EVENT_RX_OVERRUN_ERROR; |
| elessair | 0:f269e3021894 | 244 | } |
| elessair | 0:f269e3021894 | 245 | UART_CB.rx_asynch_handler(); |
| elessair | 0:f269e3021894 | 246 | } |
| elessair | 0:f269e3021894 | 247 | } |
| elessair | 0:f269e3021894 | 248 | #endif // DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 249 | } |
| elessair | 0:f269e3021894 | 250 | |
| elessair | 0:f269e3021894 | 251 | void serial_init(serial_t *obj, PinName tx, PinName rx) { |
| elessair | 0:f269e3021894 | 252 | UART_CB.pseltxd = |
| elessair | 0:f269e3021894 | 253 | (tx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)tx; |
| elessair | 0:f269e3021894 | 254 | UART_CB.pselrxd = |
| elessair | 0:f269e3021894 | 255 | (rx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rx; |
| elessair | 0:f269e3021894 | 256 | if (UART_CB.pseltxd != NRF_UART_PSEL_DISCONNECTED) { |
| elessair | 0:f269e3021894 | 257 | nrf_gpio_pin_set(UART_CB.pseltxd); |
| elessair | 0:f269e3021894 | 258 | nrf_gpio_cfg_output(UART_CB.pseltxd); |
| elessair | 0:f269e3021894 | 259 | } |
| elessair | 0:f269e3021894 | 260 | if (UART_CB.pselrxd != NRF_UART_PSEL_DISCONNECTED) { |
| elessair | 0:f269e3021894 | 261 | nrf_gpio_cfg_input(UART_CB.pselrxd, NRF_GPIO_PIN_NOPULL); |
| elessair | 0:f269e3021894 | 262 | } |
| elessair | 0:f269e3021894 | 263 | |
| elessair | 0:f269e3021894 | 264 | if (UART_CB.initialized) { |
| elessair | 0:f269e3021894 | 265 | // For already initialized peripheral it is sufficient to reconfigure |
| elessair | 0:f269e3021894 | 266 | // RX/TX pins only. |
| elessair | 0:f269e3021894 | 267 | |
| elessair | 0:f269e3021894 | 268 | // Ensure that there is no unfinished TX transfer. |
| elessair | 0:f269e3021894 | 269 | while (!serial_writable(obj)) { |
| elessair | 0:f269e3021894 | 270 | } |
| elessair | 0:f269e3021894 | 271 | // UART pins can be configured only when the peripheral is disabled. |
| elessair | 0:f269e3021894 | 272 | nrf_uart_disable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 273 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
| elessair | 0:f269e3021894 | 274 | nrf_uart_enable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 275 | } |
| elessair | 0:f269e3021894 | 276 | else { |
| elessair | 0:f269e3021894 | 277 | UART_CB.baudrate = UART_DEFAULT_BAUDRATE; |
| elessair | 0:f269e3021894 | 278 | UART_CB.parity = UART_DEFAULT_PARITY; |
| elessair | 0:f269e3021894 | 279 | UART_CB.hwfc = UART_DEFAULT_HWFC; |
| elessair | 0:f269e3021894 | 280 | UART_CB.pselcts = UART_DEFAULT_CTS; |
| elessair | 0:f269e3021894 | 281 | UART_CB.pselrts = UART_DEFAULT_RTS; |
| elessair | 0:f269e3021894 | 282 | |
| elessair | 0:f269e3021894 | 283 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
| elessair | 0:f269e3021894 | 284 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
| elessair | 0:f269e3021894 | 285 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); |
| elessair | 0:f269e3021894 | 286 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); |
| elessair | 0:f269e3021894 | 287 | |
| elessair | 0:f269e3021894 | 288 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | |
| elessair | 0:f269e3021894 | 289 | NRF_UART_INT_MASK_TXDRDY); |
| elessair | 0:f269e3021894 | 290 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 291 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_ERROR); |
| elessair | 0:f269e3021894 | 292 | #endif |
| elessair | 0:f269e3021894 | 293 | nrf_drv_common_irq_enable(UART_IRQn, APP_IRQ_PRIORITY_LOW); |
| elessair | 0:f269e3021894 | 294 | |
| elessair | 0:f269e3021894 | 295 | // TX interrupt needs to be signaled when transmitter buffer is empty, |
| elessair | 0:f269e3021894 | 296 | // so a dummy transmission is needed to get the TXDRDY event initially |
| elessair | 0:f269e3021894 | 297 | // set. |
| elessair | 0:f269e3021894 | 298 | nrf_uart_configure(UART_INSTANCE, |
| elessair | 0:f269e3021894 | 299 | NRF_UART_PARITY_EXCLUDED, NRF_UART_HWFC_DISABLED); |
| elessair | 0:f269e3021894 | 300 | // Use maximum baud rate, so this dummy transmission takes as little |
| elessair | 0:f269e3021894 | 301 | // time as possible. |
| elessair | 0:f269e3021894 | 302 | nrf_uart_baudrate_set(UART_INSTANCE, NRF_UART_BAUDRATE_1000000); |
| elessair | 0:f269e3021894 | 303 | // Perform it with disconnected TX pin, so nothing actually comes out |
| elessair | 0:f269e3021894 | 304 | // of the device. |
| elessair | 0:f269e3021894 | 305 | nrf_uart_txrx_pins_disconnect(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 306 | nrf_uart_hwfc_pins_disconnect(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 307 | nrf_uart_enable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 308 | nrf_uart_txd_set(UART_INSTANCE, 0); |
| elessair | 0:f269e3021894 | 309 | while (!nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) { |
| elessair | 0:f269e3021894 | 310 | } |
| elessair | 0:f269e3021894 | 311 | nrf_uart_disable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 312 | |
| elessair | 0:f269e3021894 | 313 | // Now everything is prepared to set the default configuration and |
| elessair | 0:f269e3021894 | 314 | // connect the peripheral to actual pins. |
| elessair | 0:f269e3021894 | 315 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
| elessair | 0:f269e3021894 | 316 | nrf_uart_baudrate_set(UART_INSTANCE, UART_CB.baudrate); |
| elessair | 0:f269e3021894 | 317 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
| elessair | 0:f269e3021894 | 318 | if (UART_CB.hwfc == NRF_UART_HWFC_ENABLED) { |
| elessair | 0:f269e3021894 | 319 | internal_set_hwfc(FlowControlRTSCTS, |
| elessair | 0:f269e3021894 | 320 | (PinName) UART_CB.pselrts, (PinName) UART_CB.pselcts); |
| elessair | 0:f269e3021894 | 321 | } |
| elessair | 0:f269e3021894 | 322 | |
| elessair | 0:f269e3021894 | 323 | nrf_uart_enable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 324 | |
| elessair | 0:f269e3021894 | 325 | UART_CB.initialized = true; |
| elessair | 0:f269e3021894 | 326 | } |
| elessair | 0:f269e3021894 | 327 | |
| elessair | 0:f269e3021894 | 328 | if (tx == STDIO_UART_TX && rx == STDIO_UART_RX) { |
| elessair | 0:f269e3021894 | 329 | stdio_uart_inited = 1; |
| elessair | 0:f269e3021894 | 330 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
| elessair | 0:f269e3021894 | 331 | } |
| elessair | 0:f269e3021894 | 332 | else { |
| elessair | 0:f269e3021894 | 333 | stdio_uart_inited = 0; |
| elessair | 0:f269e3021894 | 334 | } |
| elessair | 0:f269e3021894 | 335 | } |
| elessair | 0:f269e3021894 | 336 | |
| elessair | 0:f269e3021894 | 337 | void serial_free(serial_t *obj) |
| elessair | 0:f269e3021894 | 338 | { |
| elessair | 0:f269e3021894 | 339 | (void)obj; |
| elessair | 0:f269e3021894 | 340 | |
| elessair | 0:f269e3021894 | 341 | if (UART_CB.initialized) { |
| elessair | 0:f269e3021894 | 342 | nrf_uart_disable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 343 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | |
| elessair | 0:f269e3021894 | 344 | NRF_UART_INT_MASK_TXDRDY | |
| elessair | 0:f269e3021894 | 345 | NRF_UART_INT_MASK_ERROR); |
| elessair | 0:f269e3021894 | 346 | nrf_drv_common_irq_disable(UART_IRQn); |
| elessair | 0:f269e3021894 | 347 | UART_CB.initialized = false; |
| elessair | 0:f269e3021894 | 348 | |
| elessair | 0:f269e3021894 | 349 | // There is only one UART instance, thus at this point the stdio UART |
| elessair | 0:f269e3021894 | 350 | // can no longer be initialized. |
| elessair | 0:f269e3021894 | 351 | stdio_uart_inited = 0; |
| elessair | 0:f269e3021894 | 352 | } |
| elessair | 0:f269e3021894 | 353 | } |
| elessair | 0:f269e3021894 | 354 | |
| elessair | 0:f269e3021894 | 355 | void serial_baud(serial_t *obj, int baudrate) |
| elessair | 0:f269e3021894 | 356 | { |
| elessair | 0:f269e3021894 | 357 | // nrf_uart_baudrate_set() is not used here (registers are accessed |
| elessair | 0:f269e3021894 | 358 | // directly) to make it possible to set special baud rates like 56000 |
| elessair | 0:f269e3021894 | 359 | // or 31250. |
| elessair | 0:f269e3021894 | 360 | |
| elessair | 0:f269e3021894 | 361 | static uint32_t const acceptedSpeeds[][2] = { |
| elessair | 0:f269e3021894 | 362 | { 1200, UART_BAUDRATE_BAUDRATE_Baud1200 }, |
| elessair | 0:f269e3021894 | 363 | { 2400, UART_BAUDRATE_BAUDRATE_Baud2400 }, |
| elessair | 0:f269e3021894 | 364 | { 4800, UART_BAUDRATE_BAUDRATE_Baud4800 }, |
| elessair | 0:f269e3021894 | 365 | { 9600, UART_BAUDRATE_BAUDRATE_Baud9600 }, |
| elessair | 0:f269e3021894 | 366 | { 14400, UART_BAUDRATE_BAUDRATE_Baud14400 }, |
| elessair | 0:f269e3021894 | 367 | { 19200, UART_BAUDRATE_BAUDRATE_Baud19200 }, |
| elessair | 0:f269e3021894 | 368 | { 28800, UART_BAUDRATE_BAUDRATE_Baud28800 }, |
| elessair | 0:f269e3021894 | 369 | { 31250, (0x00800000UL) /* 31250 baud */ }, |
| elessair | 0:f269e3021894 | 370 | { 38400, UART_BAUDRATE_BAUDRATE_Baud38400 }, |
| elessair | 0:f269e3021894 | 371 | { 56000, (0x00E51000UL) /* 56000 baud */ }, |
| elessair | 0:f269e3021894 | 372 | { 57600, UART_BAUDRATE_BAUDRATE_Baud57600 }, |
| elessair | 0:f269e3021894 | 373 | { 76800, UART_BAUDRATE_BAUDRATE_Baud76800 }, |
| elessair | 0:f269e3021894 | 374 | { 115200, UART_BAUDRATE_BAUDRATE_Baud115200 }, |
| elessair | 0:f269e3021894 | 375 | { 230400, UART_BAUDRATE_BAUDRATE_Baud230400 }, |
| elessair | 0:f269e3021894 | 376 | { 250000, UART_BAUDRATE_BAUDRATE_Baud250000 }, |
| elessair | 0:f269e3021894 | 377 | { 460800, UART_BAUDRATE_BAUDRATE_Baud460800 }, |
| elessair | 0:f269e3021894 | 378 | { 921600, UART_BAUDRATE_BAUDRATE_Baud921600 }, |
| elessair | 0:f269e3021894 | 379 | { 1000000, UART_BAUDRATE_BAUDRATE_Baud1M } |
| elessair | 0:f269e3021894 | 380 | }; |
| elessair | 0:f269e3021894 | 381 | |
| elessair | 0:f269e3021894 | 382 | if (baudrate <= 1200) { |
| elessair | 0:f269e3021894 | 383 | UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200; |
| elessair | 0:f269e3021894 | 384 | return; |
| elessair | 0:f269e3021894 | 385 | } |
| elessair | 0:f269e3021894 | 386 | |
| elessair | 0:f269e3021894 | 387 | int const item_cnt = sizeof(acceptedSpeeds)/sizeof(acceptedSpeeds[0]); |
| elessair | 0:f269e3021894 | 388 | for (int i = 1; i < item_cnt; i++) { |
| elessair | 0:f269e3021894 | 389 | if ((uint32_t)baudrate < acceptedSpeeds[i][0]) { |
| elessair | 0:f269e3021894 | 390 | UART_INSTANCE->BAUDRATE = acceptedSpeeds[i - 1][1]; |
| elessair | 0:f269e3021894 | 391 | return; |
| elessair | 0:f269e3021894 | 392 | } |
| elessair | 0:f269e3021894 | 393 | } |
| elessair | 0:f269e3021894 | 394 | |
| elessair | 0:f269e3021894 | 395 | UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M; |
| elessair | 0:f269e3021894 | 396 | } |
| elessair | 0:f269e3021894 | 397 | |
| elessair | 0:f269e3021894 | 398 | void serial_format(serial_t *obj, |
| elessair | 0:f269e3021894 | 399 | int data_bits, SerialParity parity, int stop_bits) |
| elessair | 0:f269e3021894 | 400 | { |
| elessair | 0:f269e3021894 | 401 | (void)obj; |
| elessair | 0:f269e3021894 | 402 | |
| elessair | 0:f269e3021894 | 403 | if (data_bits != 8) { |
| elessair | 0:f269e3021894 | 404 | error("UART supports only 8 data bits.\r\n"); |
| elessair | 0:f269e3021894 | 405 | } |
| elessair | 0:f269e3021894 | 406 | if (stop_bits != 1) { |
| elessair | 0:f269e3021894 | 407 | error("UART supports only 1 stop bits.\r\n"); |
| elessair | 0:f269e3021894 | 408 | } |
| elessair | 0:f269e3021894 | 409 | if (parity == ParityNone) { |
| elessair | 0:f269e3021894 | 410 | UART_CB.parity = NRF_UART_PARITY_EXCLUDED; |
| elessair | 0:f269e3021894 | 411 | } else if (parity == ParityEven) { |
| elessair | 0:f269e3021894 | 412 | UART_CB.parity = NRF_UART_PARITY_INCLUDED; |
| elessair | 0:f269e3021894 | 413 | } else { |
| elessair | 0:f269e3021894 | 414 | error("UART supports only even parity.\r\n"); |
| elessair | 0:f269e3021894 | 415 | } |
| elessair | 0:f269e3021894 | 416 | |
| elessair | 0:f269e3021894 | 417 | // Reconfigure UART peripheral. |
| elessair | 0:f269e3021894 | 418 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
| elessair | 0:f269e3021894 | 419 | } |
| elessair | 0:f269e3021894 | 420 | |
| elessair | 0:f269e3021894 | 421 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) |
| elessair | 0:f269e3021894 | 422 | { |
| elessair | 0:f269e3021894 | 423 | (void)obj; |
| elessair | 0:f269e3021894 | 424 | UART_CB.irq_handler = handler; |
| elessair | 0:f269e3021894 | 425 | UART_CB.irq_context = id; |
| elessair | 0:f269e3021894 | 426 | } |
| elessair | 0:f269e3021894 | 427 | |
| elessair | 0:f269e3021894 | 428 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) |
| elessair | 0:f269e3021894 | 429 | { |
| elessair | 0:f269e3021894 | 430 | (void)obj; |
| elessair | 0:f269e3021894 | 431 | if (enable) { |
| elessair | 0:f269e3021894 | 432 | switch (irq) { |
| elessair | 0:f269e3021894 | 433 | case RxIrq: |
| elessair | 0:f269e3021894 | 434 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 435 | UART_CB.irq_enabled |= UART_IRQ_RX; |
| elessair | 0:f269e3021894 | 436 | #endif |
| elessair | 0:f269e3021894 | 437 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
| elessair | 0:f269e3021894 | 438 | break; |
| elessair | 0:f269e3021894 | 439 | |
| elessair | 0:f269e3021894 | 440 | case TxIrq: |
| elessair | 0:f269e3021894 | 441 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 442 | UART_CB.irq_enabled |= UART_IRQ_TX; |
| elessair | 0:f269e3021894 | 443 | #endif |
| elessair | 0:f269e3021894 | 444 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
| elessair | 0:f269e3021894 | 445 | break; |
| elessair | 0:f269e3021894 | 446 | } |
| elessair | 0:f269e3021894 | 447 | } else { |
| elessair | 0:f269e3021894 | 448 | switch (irq) { |
| elessair | 0:f269e3021894 | 449 | case RxIrq: |
| elessair | 0:f269e3021894 | 450 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 451 | UART_CB.irq_enabled &= ~UART_IRQ_RX; |
| elessair | 0:f269e3021894 | 452 | if (!UART_CB.rx_active) |
| elessair | 0:f269e3021894 | 453 | #endif |
| elessair | 0:f269e3021894 | 454 | { |
| elessair | 0:f269e3021894 | 455 | nrf_uart_int_disable(UART_INSTANCE, |
| elessair | 0:f269e3021894 | 456 | NRF_UART_INT_MASK_RXDRDY); |
| elessair | 0:f269e3021894 | 457 | } |
| elessair | 0:f269e3021894 | 458 | break; |
| elessair | 0:f269e3021894 | 459 | |
| elessair | 0:f269e3021894 | 460 | case TxIrq: |
| elessair | 0:f269e3021894 | 461 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 462 | UART_CB.irq_enabled &= ~UART_IRQ_TX; |
| elessair | 0:f269e3021894 | 463 | if (!UART_CB.tx_active) |
| elessair | 0:f269e3021894 | 464 | #endif |
| elessair | 0:f269e3021894 | 465 | { |
| elessair | 0:f269e3021894 | 466 | nrf_uart_int_disable(UART_INSTANCE, |
| elessair | 0:f269e3021894 | 467 | NRF_UART_INT_MASK_TXDRDY); |
| elessair | 0:f269e3021894 | 468 | } |
| elessair | 0:f269e3021894 | 469 | break; |
| elessair | 0:f269e3021894 | 470 | } |
| elessair | 0:f269e3021894 | 471 | } |
| elessair | 0:f269e3021894 | 472 | } |
| elessair | 0:f269e3021894 | 473 | |
| elessair | 0:f269e3021894 | 474 | int serial_getc(serial_t *obj) |
| elessair | 0:f269e3021894 | 475 | { |
| elessair | 0:f269e3021894 | 476 | while (!serial_readable(obj)) { |
| elessair | 0:f269e3021894 | 477 | } |
| elessair | 0:f269e3021894 | 478 | |
| elessair | 0:f269e3021894 | 479 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
| elessair | 0:f269e3021894 | 480 | return nrf_uart_rxd_get(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 481 | } |
| elessair | 0:f269e3021894 | 482 | |
| elessair | 0:f269e3021894 | 483 | void serial_putc(serial_t *obj, int c) |
| elessair | 0:f269e3021894 | 484 | { |
| elessair | 0:f269e3021894 | 485 | while (!serial_writable(obj)) { |
| elessair | 0:f269e3021894 | 486 | } |
| elessair | 0:f269e3021894 | 487 | |
| elessair | 0:f269e3021894 | 488 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
| elessair | 0:f269e3021894 | 489 | nrf_uart_txd_set(UART_INSTANCE, (uint8_t)c); |
| elessair | 0:f269e3021894 | 490 | } |
| elessair | 0:f269e3021894 | 491 | |
| elessair | 0:f269e3021894 | 492 | int serial_readable(serial_t *obj) |
| elessair | 0:f269e3021894 | 493 | { |
| elessair | 0:f269e3021894 | 494 | (void)obj; |
| elessair | 0:f269e3021894 | 495 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 496 | if (UART_CB.rx_active) { |
| elessair | 0:f269e3021894 | 497 | return 0; |
| elessair | 0:f269e3021894 | 498 | } |
| elessair | 0:f269e3021894 | 499 | #endif |
| elessair | 0:f269e3021894 | 500 | return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)); |
| elessair | 0:f269e3021894 | 501 | } |
| elessair | 0:f269e3021894 | 502 | |
| elessair | 0:f269e3021894 | 503 | int serial_writable(serial_t *obj) |
| elessair | 0:f269e3021894 | 504 | { |
| elessair | 0:f269e3021894 | 505 | (void)obj; |
| elessair | 0:f269e3021894 | 506 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 507 | if (UART_CB.tx_active) { |
| elessair | 0:f269e3021894 | 508 | return 0; |
| elessair | 0:f269e3021894 | 509 | } |
| elessair | 0:f269e3021894 | 510 | #endif |
| elessair | 0:f269e3021894 | 511 | return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)); |
| elessair | 0:f269e3021894 | 512 | } |
| elessair | 0:f269e3021894 | 513 | |
| elessair | 0:f269e3021894 | 514 | void serial_break_set(serial_t *obj) |
| elessair | 0:f269e3021894 | 515 | { |
| elessair | 0:f269e3021894 | 516 | (void)obj; |
| elessair | 0:f269e3021894 | 517 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_SUSPEND); |
| elessair | 0:f269e3021894 | 518 | nrf_uart_txrx_pins_disconnect(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 519 | nrf_gpio_pin_clear(UART_CB.pseltxd); |
| elessair | 0:f269e3021894 | 520 | } |
| elessair | 0:f269e3021894 | 521 | |
| elessair | 0:f269e3021894 | 522 | void serial_break_clear(serial_t *obj) |
| elessair | 0:f269e3021894 | 523 | { |
| elessair | 0:f269e3021894 | 524 | (void)obj; |
| elessair | 0:f269e3021894 | 525 | nrf_gpio_pin_set(UART_CB.pseltxd); |
| elessair | 0:f269e3021894 | 526 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
| elessair | 0:f269e3021894 | 527 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); |
| elessair | 0:f269e3021894 | 528 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); |
| elessair | 0:f269e3021894 | 529 | } |
| elessair | 0:f269e3021894 | 530 | |
| elessair | 0:f269e3021894 | 531 | |
| elessair | 0:f269e3021894 | 532 | static void internal_set_hwfc(FlowControl type, |
| elessair | 0:f269e3021894 | 533 | PinName rxflow, PinName txflow) |
| elessair | 0:f269e3021894 | 534 | { |
| elessair | 0:f269e3021894 | 535 | UART_CB.pselrts = |
| elessair | 0:f269e3021894 | 536 | ((rxflow == NC) || (type == FlowControlCTS)) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rxflow; |
| elessair | 0:f269e3021894 | 537 | UART_CB.pselcts = |
| elessair | 0:f269e3021894 | 538 | ((txflow == NC) || (type == FlowControlRTS)) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)txflow; |
| elessair | 0:f269e3021894 | 539 | |
| elessair | 0:f269e3021894 | 540 | if (UART_CB.pselrts != NRF_UART_PSEL_DISCONNECTED) { |
| elessair | 0:f269e3021894 | 541 | nrf_gpio_pin_set(UART_CB.pselrts); |
| elessair | 0:f269e3021894 | 542 | nrf_gpio_cfg_output(UART_CB.pselrts); |
| elessair | 0:f269e3021894 | 543 | } |
| elessair | 0:f269e3021894 | 544 | if (UART_CB.pselcts != NRF_UART_PSEL_DISCONNECTED) { |
| elessair | 0:f269e3021894 | 545 | nrf_gpio_cfg_input(UART_CB.pselcts, NRF_GPIO_PIN_NOPULL); |
| elessair | 0:f269e3021894 | 546 | } |
| elessair | 0:f269e3021894 | 547 | |
| elessair | 0:f269e3021894 | 548 | UART_CB.hwfc = (type == FlowControlNone)? NRF_UART_HWFC_DISABLED : UART0_CONFIG_HWFC; |
| elessair | 0:f269e3021894 | 549 | |
| elessair | 0:f269e3021894 | 550 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
| elessair | 0:f269e3021894 | 551 | nrf_uart_hwfc_pins_set(UART_INSTANCE, UART_CB.pselrts, UART_CB.pselcts); |
| elessair | 0:f269e3021894 | 552 | } |
| elessair | 0:f269e3021894 | 553 | |
| elessair | 0:f269e3021894 | 554 | void serial_set_flow_control(serial_t *obj, FlowControl type, |
| elessair | 0:f269e3021894 | 555 | PinName rxflow, PinName txflow) |
| elessair | 0:f269e3021894 | 556 | { |
| elessair | 0:f269e3021894 | 557 | (void)obj; |
| elessair | 0:f269e3021894 | 558 | |
| elessair | 0:f269e3021894 | 559 | nrf_uart_disable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 560 | internal_set_hwfc(type, rxflow, txflow); |
| elessair | 0:f269e3021894 | 561 | nrf_uart_enable(UART_INSTANCE); |
| elessair | 0:f269e3021894 | 562 | } |
| elessair | 0:f269e3021894 | 563 | |
| elessair | 0:f269e3021894 | 564 | |
| elessair | 0:f269e3021894 | 565 | void serial_clear(serial_t *obj) { |
| elessair | 0:f269e3021894 | 566 | (void)obj; |
| elessair | 0:f269e3021894 | 567 | } |
| elessair | 0:f269e3021894 | 568 | |
| elessair | 0:f269e3021894 | 569 | #if DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 570 | |
| elessair | 0:f269e3021894 | 571 | int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, |
| elessair | 0:f269e3021894 | 572 | uint8_t tx_width, uint32_t handler, uint32_t event, |
| elessair | 0:f269e3021894 | 573 | DMAUsage hint) |
| elessair | 0:f269e3021894 | 574 | { |
| elessair | 0:f269e3021894 | 575 | (void)obj; |
| elessair | 0:f269e3021894 | 576 | (void)tx_width; |
| elessair | 0:f269e3021894 | 577 | (void)hint; |
| elessair | 0:f269e3021894 | 578 | if (UART_CB.tx_active || !tx_length) { |
| elessair | 0:f269e3021894 | 579 | return 0; |
| elessair | 0:f269e3021894 | 580 | } |
| elessair | 0:f269e3021894 | 581 | |
| elessair | 0:f269e3021894 | 582 | UART_CB.tx_buffer = tx; |
| elessair | 0:f269e3021894 | 583 | UART_CB.tx_length = tx_length; |
| elessair | 0:f269e3021894 | 584 | UART_CB.tx_pos = 0; |
| elessair | 0:f269e3021894 | 585 | UART_CB.tx_asynch_handler = (void(*)())handler; |
| elessair | 0:f269e3021894 | 586 | UART_CB.events_wanted &= ~SERIAL_EVENT_TX_ALL; |
| elessair | 0:f269e3021894 | 587 | UART_CB.events_wanted |= event; |
| elessair | 0:f269e3021894 | 588 | |
| elessair | 0:f269e3021894 | 589 | UART_CB.tx_active = true; |
| elessair | 0:f269e3021894 | 590 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
| elessair | 0:f269e3021894 | 591 | |
| elessair | 0:f269e3021894 | 592 | return 0; |
| elessair | 0:f269e3021894 | 593 | } |
| elessair | 0:f269e3021894 | 594 | |
| elessair | 0:f269e3021894 | 595 | void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, |
| elessair | 0:f269e3021894 | 596 | uint8_t rx_width, uint32_t handler, uint32_t event, |
| elessair | 0:f269e3021894 | 597 | uint8_t char_match, DMAUsage hint) |
| elessair | 0:f269e3021894 | 598 | { |
| elessair | 0:f269e3021894 | 599 | (void)obj; |
| elessair | 0:f269e3021894 | 600 | (void)rx_width; |
| elessair | 0:f269e3021894 | 601 | (void)hint; |
| elessair | 0:f269e3021894 | 602 | if (UART_CB.rx_active || !rx_length) { |
| elessair | 0:f269e3021894 | 603 | return; |
| elessair | 0:f269e3021894 | 604 | } |
| elessair | 0:f269e3021894 | 605 | |
| elessair | 0:f269e3021894 | 606 | UART_CB.rx_buffer = rx; |
| elessair | 0:f269e3021894 | 607 | UART_CB.rx_length = rx_length; |
| elessair | 0:f269e3021894 | 608 | UART_CB.rx_pos = 0; |
| elessair | 0:f269e3021894 | 609 | UART_CB.rx_asynch_handler = (void(*)())handler; |
| elessair | 0:f269e3021894 | 610 | UART_CB.events_wanted &= ~SERIAL_EVENT_RX_ALL; |
| elessair | 0:f269e3021894 | 611 | UART_CB.events_wanted |= event; |
| elessair | 0:f269e3021894 | 612 | UART_CB.char_match = char_match; |
| elessair | 0:f269e3021894 | 613 | |
| elessair | 0:f269e3021894 | 614 | UART_CB.rx_active = true; |
| elessair | 0:f269e3021894 | 615 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
| elessair | 0:f269e3021894 | 616 | } |
| elessair | 0:f269e3021894 | 617 | |
| elessair | 0:f269e3021894 | 618 | uint8_t serial_tx_active(serial_t *obj) |
| elessair | 0:f269e3021894 | 619 | { |
| elessair | 0:f269e3021894 | 620 | (void)obj; |
| elessair | 0:f269e3021894 | 621 | return UART_CB.tx_active; |
| elessair | 0:f269e3021894 | 622 | } |
| elessair | 0:f269e3021894 | 623 | |
| elessair | 0:f269e3021894 | 624 | uint8_t serial_rx_active(serial_t *obj) |
| elessair | 0:f269e3021894 | 625 | { |
| elessair | 0:f269e3021894 | 626 | (void)obj; |
| elessair | 0:f269e3021894 | 627 | return UART_CB.rx_active; |
| elessair | 0:f269e3021894 | 628 | } |
| elessair | 0:f269e3021894 | 629 | |
| elessair | 0:f269e3021894 | 630 | int serial_irq_handler_asynch(serial_t *obj) |
| elessair | 0:f269e3021894 | 631 | { |
| elessair | 0:f269e3021894 | 632 | (void)obj; |
| elessair | 0:f269e3021894 | 633 | uint32_t events_to_report = UART_CB.events_wanted & UART_CB.events_occured; |
| elessair | 0:f269e3021894 | 634 | UART_CB.events_occured &= (~events_to_report); |
| elessair | 0:f269e3021894 | 635 | return events_to_report; |
| elessair | 0:f269e3021894 | 636 | } |
| elessair | 0:f269e3021894 | 637 | |
| elessair | 0:f269e3021894 | 638 | void serial_tx_abort_asynch(serial_t *obj) |
| elessair | 0:f269e3021894 | 639 | { |
| elessair | 0:f269e3021894 | 640 | (void)obj; |
| elessair | 0:f269e3021894 | 641 | end_asynch_tx(); |
| elessair | 0:f269e3021894 | 642 | UART_CB.tx_asynch_handler = NULL; |
| elessair | 0:f269e3021894 | 643 | } |
| elessair | 0:f269e3021894 | 644 | |
| elessair | 0:f269e3021894 | 645 | void serial_rx_abort_asynch(serial_t *obj) |
| elessair | 0:f269e3021894 | 646 | { |
| elessair | 0:f269e3021894 | 647 | (void)obj; |
| elessair | 0:f269e3021894 | 648 | end_asynch_rx(); |
| elessair | 0:f269e3021894 | 649 | UART_CB.rx_asynch_handler = NULL; |
| elessair | 0:f269e3021894 | 650 | } |
| elessair | 0:f269e3021894 | 651 | |
| elessair | 0:f269e3021894 | 652 | #endif // DEVICE_SERIAL_ASYNCH |
| elessair | 0:f269e3021894 | 653 | |
| elessair | 0:f269e3021894 | 654 | #endif // DEVICE_SERIAL |