Mouse code for the MacroRat
mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5_SDK13/serial_api.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* |
sahilmgandhi | 18:6a4db94011d3 | 2 | * Copyright (c) 2013 Nordic Semiconductor ASA |
sahilmgandhi | 18:6a4db94011d3 | 3 | * All rights reserved. |
sahilmgandhi | 18:6a4db94011d3 | 4 | * |
sahilmgandhi | 18:6a4db94011d3 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
sahilmgandhi | 18:6a4db94011d3 | 6 | * are permitted provided that the following conditions are met: |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * 1. Redistributions of source code must retain the above copyright notice, this list |
sahilmgandhi | 18:6a4db94011d3 | 9 | * of conditions and the following disclaimer. |
sahilmgandhi | 18:6a4db94011d3 | 10 | * |
sahilmgandhi | 18:6a4db94011d3 | 11 | * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA |
sahilmgandhi | 18:6a4db94011d3 | 12 | * integrated circuit in a product or a software update for such product, must reproduce |
sahilmgandhi | 18:6a4db94011d3 | 13 | * the above copyright notice, this list of conditions and the following disclaimer in |
sahilmgandhi | 18:6a4db94011d3 | 14 | * the documentation and/or other materials provided with the distribution. |
sahilmgandhi | 18:6a4db94011d3 | 15 | * |
sahilmgandhi | 18:6a4db94011d3 | 16 | * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be |
sahilmgandhi | 18:6a4db94011d3 | 17 | * used to endorse or promote products derived from this software without specific prior |
sahilmgandhi | 18:6a4db94011d3 | 18 | * written permission. |
sahilmgandhi | 18:6a4db94011d3 | 19 | * |
sahilmgandhi | 18:6a4db94011d3 | 20 | * 4. This software, with or without modification, must only be used with a |
sahilmgandhi | 18:6a4db94011d3 | 21 | * Nordic Semiconductor ASA integrated circuit. |
sahilmgandhi | 18:6a4db94011d3 | 22 | * |
sahilmgandhi | 18:6a4db94011d3 | 23 | * 5. Any software provided in binary or object form under this license must not be reverse |
sahilmgandhi | 18:6a4db94011d3 | 24 | * engineered, decompiled, modified and/or disassembled. |
sahilmgandhi | 18:6a4db94011d3 | 25 | * |
sahilmgandhi | 18:6a4db94011d3 | 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
sahilmgandhi | 18:6a4db94011d3 | 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
sahilmgandhi | 18:6a4db94011d3 | 28 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
sahilmgandhi | 18:6a4db94011d3 | 29 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
sahilmgandhi | 18:6a4db94011d3 | 30 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
sahilmgandhi | 18:6a4db94011d3 | 31 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
sahilmgandhi | 18:6a4db94011d3 | 32 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
sahilmgandhi | 18:6a4db94011d3 | 33 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
sahilmgandhi | 18:6a4db94011d3 | 34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
sahilmgandhi | 18:6a4db94011d3 | 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
sahilmgandhi | 18:6a4db94011d3 | 36 | * |
sahilmgandhi | 18:6a4db94011d3 | 37 | */ |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | #include "serial_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 40 | |
sahilmgandhi | 18:6a4db94011d3 | 41 | #if DEVICE_SERIAL |
sahilmgandhi | 18:6a4db94011d3 | 42 | |
sahilmgandhi | 18:6a4db94011d3 | 43 | #include <string.h> |
sahilmgandhi | 18:6a4db94011d3 | 44 | #include "mbed_assert.h" |
sahilmgandhi | 18:6a4db94011d3 | 45 | #include "mbed_error.h" |
sahilmgandhi | 18:6a4db94011d3 | 46 | #include "nrf_uart.h" |
sahilmgandhi | 18:6a4db94011d3 | 47 | #include "nrf_drv_common.h" |
sahilmgandhi | 18:6a4db94011d3 | 48 | #include "app_util_platform.h" |
sahilmgandhi | 18:6a4db94011d3 | 49 | #include "nrf_gpio.h" |
sahilmgandhi | 18:6a4db94011d3 | 50 | |
sahilmgandhi | 18:6a4db94011d3 | 51 | #define UART_INSTANCE_COUNT 1 |
sahilmgandhi | 18:6a4db94011d3 | 52 | #define UART_INSTANCE NRF_UART0 |
sahilmgandhi | 18:6a4db94011d3 | 53 | #define UART_IRQn UART0_IRQn |
sahilmgandhi | 18:6a4db94011d3 | 54 | #define UART_IRQ_HANDLER UART0_IRQHandler |
sahilmgandhi | 18:6a4db94011d3 | 55 | #define UART_INSTANCE_ID 0 |
sahilmgandhi | 18:6a4db94011d3 | 56 | #define UART_CB uart_cb[UART_INSTANCE_ID] |
sahilmgandhi | 18:6a4db94011d3 | 57 | |
sahilmgandhi | 18:6a4db94011d3 | 58 | #define UART_DEFAULT_BAUDRATE UART_DEFAULT_CONFIG_BAUDRATE |
sahilmgandhi | 18:6a4db94011d3 | 59 | #define UART_DEFAULT_PARITY UART_DEFAULT_CONFIG_PARITY |
sahilmgandhi | 18:6a4db94011d3 | 60 | |
sahilmgandhi | 18:6a4db94011d3 | 61 | // expected the macro from mbed configuration system |
sahilmgandhi | 18:6a4db94011d3 | 62 | #ifndef MBED_CONF_NORDIC_UART_HWFC |
sahilmgandhi | 18:6a4db94011d3 | 63 | #define MBED_CONF_NORDIC_UART_HWFC 1 |
sahilmgandhi | 18:6a4db94011d3 | 64 | #warning None of UART flow control configuration (expected macro MBED_CONF_NORDIC_UART_HWFC). The RTSCTS flow control is used by default . |
sahilmgandhi | 18:6a4db94011d3 | 65 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 66 | |
sahilmgandhi | 18:6a4db94011d3 | 67 | #if MBED_CONF_NORDIC_UART_HWFC == 1 |
sahilmgandhi | 18:6a4db94011d3 | 68 | #define UART_DEFAULT_HWFC UART_DEFAULT_CONFIG_HWFC |
sahilmgandhi | 18:6a4db94011d3 | 69 | #else |
sahilmgandhi | 18:6a4db94011d3 | 70 | #define UART_DEFAULT_HWFC NRF_UART_HWFC_DISABLED |
sahilmgandhi | 18:6a4db94011d3 | 71 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 72 | |
sahilmgandhi | 18:6a4db94011d3 | 73 | #define UART_DEFAULT_CTS CTS_PIN_NUMBER |
sahilmgandhi | 18:6a4db94011d3 | 74 | #define UART_DEFAULT_RTS RTS_PIN_NUMBER |
sahilmgandhi | 18:6a4db94011d3 | 75 | |
sahilmgandhi | 18:6a4db94011d3 | 76 | #ifdef NRF51 |
sahilmgandhi | 18:6a4db94011d3 | 77 | #define NRFx_MBED_UART_IRQ_PRIORITY APP_IRQ_PRIORITY_LOW |
sahilmgandhi | 18:6a4db94011d3 | 78 | #elif defined(NRF52) || defined(NRF52840_XXAA) |
sahilmgandhi | 18:6a4db94011d3 | 79 | #define NRFx_MBED_UART_IRQ_PRIORITY APP_IRQ_PRIORITY_LOWEST |
sahilmgandhi | 18:6a4db94011d3 | 80 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 81 | |
sahilmgandhi | 18:6a4db94011d3 | 82 | // Required by "retarget.cpp". |
sahilmgandhi | 18:6a4db94011d3 | 83 | int stdio_uart_inited = 0; |
sahilmgandhi | 18:6a4db94011d3 | 84 | serial_t stdio_uart; |
sahilmgandhi | 18:6a4db94011d3 | 85 | |
sahilmgandhi | 18:6a4db94011d3 | 86 | typedef struct |
sahilmgandhi | 18:6a4db94011d3 | 87 | { |
sahilmgandhi | 18:6a4db94011d3 | 88 | bool initialized; |
sahilmgandhi | 18:6a4db94011d3 | 89 | uint32_t irq_context; |
sahilmgandhi | 18:6a4db94011d3 | 90 | uart_irq_handler irq_handler; |
sahilmgandhi | 18:6a4db94011d3 | 91 | |
sahilmgandhi | 18:6a4db94011d3 | 92 | uint32_t pselrxd; |
sahilmgandhi | 18:6a4db94011d3 | 93 | uint32_t pseltxd; |
sahilmgandhi | 18:6a4db94011d3 | 94 | uint32_t pselcts; |
sahilmgandhi | 18:6a4db94011d3 | 95 | uint32_t pselrts; |
sahilmgandhi | 18:6a4db94011d3 | 96 | nrf_uart_hwfc_t hwfc; |
sahilmgandhi | 18:6a4db94011d3 | 97 | nrf_uart_parity_t parity; |
sahilmgandhi | 18:6a4db94011d3 | 98 | nrf_uart_baudrate_t baudrate; |
sahilmgandhi | 18:6a4db94011d3 | 99 | |
sahilmgandhi | 18:6a4db94011d3 | 100 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 101 | bool volatile rx_active; |
sahilmgandhi | 18:6a4db94011d3 | 102 | uint8_t *rx_buffer; |
sahilmgandhi | 18:6a4db94011d3 | 103 | size_t rx_length; |
sahilmgandhi | 18:6a4db94011d3 | 104 | size_t rx_pos; |
sahilmgandhi | 18:6a4db94011d3 | 105 | void (*rx_asynch_handler)(); |
sahilmgandhi | 18:6a4db94011d3 | 106 | uint8_t char_match; |
sahilmgandhi | 18:6a4db94011d3 | 107 | |
sahilmgandhi | 18:6a4db94011d3 | 108 | bool volatile tx_active; |
sahilmgandhi | 18:6a4db94011d3 | 109 | const uint8_t *tx_buffer; |
sahilmgandhi | 18:6a4db94011d3 | 110 | size_t tx_length; |
sahilmgandhi | 18:6a4db94011d3 | 111 | size_t tx_pos; |
sahilmgandhi | 18:6a4db94011d3 | 112 | void (*tx_asynch_handler)(); |
sahilmgandhi | 18:6a4db94011d3 | 113 | |
sahilmgandhi | 18:6a4db94011d3 | 114 | uint32_t events_wanted; |
sahilmgandhi | 18:6a4db94011d3 | 115 | uint32_t events_occured; |
sahilmgandhi | 18:6a4db94011d3 | 116 | |
sahilmgandhi | 18:6a4db94011d3 | 117 | #define UART_IRQ_TX 1 |
sahilmgandhi | 18:6a4db94011d3 | 118 | #define UART_IRQ_RX 2 |
sahilmgandhi | 18:6a4db94011d3 | 119 | uint8_t irq_enabled; |
sahilmgandhi | 18:6a4db94011d3 | 120 | #endif // DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 121 | } uart_ctlblock_t; |
sahilmgandhi | 18:6a4db94011d3 | 122 | |
sahilmgandhi | 18:6a4db94011d3 | 123 | static uart_ctlblock_t uart_cb[UART_INSTANCE_COUNT]; |
sahilmgandhi | 18:6a4db94011d3 | 124 | |
sahilmgandhi | 18:6a4db94011d3 | 125 | static void internal_set_hwfc(FlowControl type, |
sahilmgandhi | 18:6a4db94011d3 | 126 | PinName rxflow, PinName txflow); |
sahilmgandhi | 18:6a4db94011d3 | 127 | |
sahilmgandhi | 18:6a4db94011d3 | 128 | |
sahilmgandhi | 18:6a4db94011d3 | 129 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 130 | static void end_asynch_rx(void) |
sahilmgandhi | 18:6a4db94011d3 | 131 | { |
sahilmgandhi | 18:6a4db94011d3 | 132 | // If RX interrupt is activated for synchronous operations, |
sahilmgandhi | 18:6a4db94011d3 | 133 | // don't disable it, just stop handling it here. |
sahilmgandhi | 18:6a4db94011d3 | 134 | if (!(UART_CB.irq_enabled & UART_IRQ_RX)) |
sahilmgandhi | 18:6a4db94011d3 | 135 | { |
sahilmgandhi | 18:6a4db94011d3 | 136 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 137 | } |
sahilmgandhi | 18:6a4db94011d3 | 138 | UART_CB.rx_active = false; |
sahilmgandhi | 18:6a4db94011d3 | 139 | } |
sahilmgandhi | 18:6a4db94011d3 | 140 | static void end_asynch_tx(void) |
sahilmgandhi | 18:6a4db94011d3 | 141 | { |
sahilmgandhi | 18:6a4db94011d3 | 142 | // If TX interrupt is activated for synchronous operations, |
sahilmgandhi | 18:6a4db94011d3 | 143 | // don't disable it, just stop handling it here. |
sahilmgandhi | 18:6a4db94011d3 | 144 | if (!(UART_CB.irq_enabled & UART_IRQ_TX)) |
sahilmgandhi | 18:6a4db94011d3 | 145 | { |
sahilmgandhi | 18:6a4db94011d3 | 146 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 147 | } |
sahilmgandhi | 18:6a4db94011d3 | 148 | UART_CB.tx_active = false; |
sahilmgandhi | 18:6a4db94011d3 | 149 | } |
sahilmgandhi | 18:6a4db94011d3 | 150 | #endif // DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 151 | |
sahilmgandhi | 18:6a4db94011d3 | 152 | void UART_IRQ_HANDLER(void) |
sahilmgandhi | 18:6a4db94011d3 | 153 | { |
sahilmgandhi | 18:6a4db94011d3 | 154 | if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY) && |
sahilmgandhi | 18:6a4db94011d3 | 155 | nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)) |
sahilmgandhi | 18:6a4db94011d3 | 156 | { |
sahilmgandhi | 18:6a4db94011d3 | 157 | |
sahilmgandhi | 18:6a4db94011d3 | 158 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 159 | if (UART_CB.rx_active) |
sahilmgandhi | 18:6a4db94011d3 | 160 | { |
sahilmgandhi | 18:6a4db94011d3 | 161 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 162 | |
sahilmgandhi | 18:6a4db94011d3 | 163 | uint8_t rx_data = nrf_uart_rxd_get(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 164 | UART_CB.rx_buffer[UART_CB.rx_pos] = rx_data; |
sahilmgandhi | 18:6a4db94011d3 | 165 | |
sahilmgandhi | 18:6a4db94011d3 | 166 | bool end_rx = false; |
sahilmgandhi | 18:6a4db94011d3 | 167 | // If character matching should be performed, check if the current |
sahilmgandhi | 18:6a4db94011d3 | 168 | // data matches the given one. |
sahilmgandhi | 18:6a4db94011d3 | 169 | if (UART_CB.char_match != SERIAL_RESERVED_CHAR_MATCH && |
sahilmgandhi | 18:6a4db94011d3 | 170 | rx_data == UART_CB.char_match) |
sahilmgandhi | 18:6a4db94011d3 | 171 | { |
sahilmgandhi | 18:6a4db94011d3 | 172 | // If it does, report the match and abort further receiving. |
sahilmgandhi | 18:6a4db94011d3 | 173 | UART_CB.events_occured |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 174 | if (UART_CB.events_wanted & SERIAL_EVENT_RX_CHARACTER_MATCH) |
sahilmgandhi | 18:6a4db94011d3 | 175 | { |
sahilmgandhi | 18:6a4db94011d3 | 176 | end_rx = true; |
sahilmgandhi | 18:6a4db94011d3 | 177 | } |
sahilmgandhi | 18:6a4db94011d3 | 178 | } |
sahilmgandhi | 18:6a4db94011d3 | 179 | if (++UART_CB.rx_pos >= UART_CB.rx_length) |
sahilmgandhi | 18:6a4db94011d3 | 180 | { |
sahilmgandhi | 18:6a4db94011d3 | 181 | UART_CB.events_occured |= SERIAL_EVENT_RX_COMPLETE; |
sahilmgandhi | 18:6a4db94011d3 | 182 | end_rx = true; |
sahilmgandhi | 18:6a4db94011d3 | 183 | } |
sahilmgandhi | 18:6a4db94011d3 | 184 | if (end_rx) |
sahilmgandhi | 18:6a4db94011d3 | 185 | { |
sahilmgandhi | 18:6a4db94011d3 | 186 | end_asynch_rx(); |
sahilmgandhi | 18:6a4db94011d3 | 187 | |
sahilmgandhi | 18:6a4db94011d3 | 188 | if (UART_CB.rx_asynch_handler) |
sahilmgandhi | 18:6a4db94011d3 | 189 | { |
sahilmgandhi | 18:6a4db94011d3 | 190 | // Use local variable to make it possible to start a next |
sahilmgandhi | 18:6a4db94011d3 | 191 | // transfer from callback routine. |
sahilmgandhi | 18:6a4db94011d3 | 192 | void (*handler)() = UART_CB.rx_asynch_handler; |
sahilmgandhi | 18:6a4db94011d3 | 193 | UART_CB.rx_asynch_handler = NULL; |
sahilmgandhi | 18:6a4db94011d3 | 194 | handler(); |
sahilmgandhi | 18:6a4db94011d3 | 195 | } |
sahilmgandhi | 18:6a4db94011d3 | 196 | } |
sahilmgandhi | 18:6a4db94011d3 | 197 | } |
sahilmgandhi | 18:6a4db94011d3 | 198 | else |
sahilmgandhi | 18:6a4db94011d3 | 199 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 200 | |
sahilmgandhi | 18:6a4db94011d3 | 201 | if (UART_CB.irq_handler) |
sahilmgandhi | 18:6a4db94011d3 | 202 | { |
sahilmgandhi | 18:6a4db94011d3 | 203 | UART_CB.irq_handler(UART_CB.irq_context, RxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 204 | } |
sahilmgandhi | 18:6a4db94011d3 | 205 | } |
sahilmgandhi | 18:6a4db94011d3 | 206 | |
sahilmgandhi | 18:6a4db94011d3 | 207 | if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY) && |
sahilmgandhi | 18:6a4db94011d3 | 208 | nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) |
sahilmgandhi | 18:6a4db94011d3 | 209 | { |
sahilmgandhi | 18:6a4db94011d3 | 210 | |
sahilmgandhi | 18:6a4db94011d3 | 211 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 212 | if (UART_CB.tx_active) |
sahilmgandhi | 18:6a4db94011d3 | 213 | { |
sahilmgandhi | 18:6a4db94011d3 | 214 | if (++UART_CB.tx_pos <= UART_CB.tx_length) |
sahilmgandhi | 18:6a4db94011d3 | 215 | { |
sahilmgandhi | 18:6a4db94011d3 | 216 | // When there is still something to send, clear the TXDRDY event |
sahilmgandhi | 18:6a4db94011d3 | 217 | // and put next byte to transmitter. |
sahilmgandhi | 18:6a4db94011d3 | 218 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 219 | nrf_uart_txd_set(UART_INSTANCE, |
sahilmgandhi | 18:6a4db94011d3 | 220 | UART_CB.tx_buffer[UART_CB.tx_pos]); |
sahilmgandhi | 18:6a4db94011d3 | 221 | } |
sahilmgandhi | 18:6a4db94011d3 | 222 | else |
sahilmgandhi | 18:6a4db94011d3 | 223 | { |
sahilmgandhi | 18:6a4db94011d3 | 224 | // When the TXDRDY event is set after the last byte to be sent |
sahilmgandhi | 18:6a4db94011d3 | 225 | // has been passed to the transmitter, the job is done and TX |
sahilmgandhi | 18:6a4db94011d3 | 226 | // complete can be indicated. |
sahilmgandhi | 18:6a4db94011d3 | 227 | // Don't clear the TXDRDY event, it needs to remain set for the |
sahilmgandhi | 18:6a4db94011d3 | 228 | // 'serial_writable' function to work properly. |
sahilmgandhi | 18:6a4db94011d3 | 229 | end_asynch_tx(); |
sahilmgandhi | 18:6a4db94011d3 | 230 | |
sahilmgandhi | 18:6a4db94011d3 | 231 | UART_CB.events_occured |= SERIAL_EVENT_TX_COMPLETE; |
sahilmgandhi | 18:6a4db94011d3 | 232 | if (UART_CB.tx_asynch_handler) |
sahilmgandhi | 18:6a4db94011d3 | 233 | { |
sahilmgandhi | 18:6a4db94011d3 | 234 | // Use local variable to make it possible to start a next |
sahilmgandhi | 18:6a4db94011d3 | 235 | // transfer from callback routine. |
sahilmgandhi | 18:6a4db94011d3 | 236 | void (*handler)() = UART_CB.tx_asynch_handler; |
sahilmgandhi | 18:6a4db94011d3 | 237 | UART_CB.tx_asynch_handler = NULL; |
sahilmgandhi | 18:6a4db94011d3 | 238 | handler(); |
sahilmgandhi | 18:6a4db94011d3 | 239 | } |
sahilmgandhi | 18:6a4db94011d3 | 240 | } |
sahilmgandhi | 18:6a4db94011d3 | 241 | } |
sahilmgandhi | 18:6a4db94011d3 | 242 | else |
sahilmgandhi | 18:6a4db94011d3 | 243 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 244 | |
sahilmgandhi | 18:6a4db94011d3 | 245 | if (UART_CB.irq_handler) |
sahilmgandhi | 18:6a4db94011d3 | 246 | { |
sahilmgandhi | 18:6a4db94011d3 | 247 | UART_CB.irq_handler(UART_CB.irq_context, TxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 248 | } |
sahilmgandhi | 18:6a4db94011d3 | 249 | } |
sahilmgandhi | 18:6a4db94011d3 | 250 | |
sahilmgandhi | 18:6a4db94011d3 | 251 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 252 | if (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_ERROR)) |
sahilmgandhi | 18:6a4db94011d3 | 253 | { |
sahilmgandhi | 18:6a4db94011d3 | 254 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_ERROR); |
sahilmgandhi | 18:6a4db94011d3 | 255 | |
sahilmgandhi | 18:6a4db94011d3 | 256 | uint8_t errorsrc = nrf_uart_errorsrc_get_and_clear(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 257 | if (UART_CB.rx_asynch_handler) |
sahilmgandhi | 18:6a4db94011d3 | 258 | { |
sahilmgandhi | 18:6a4db94011d3 | 259 | UART_CB.events_occured |= SERIAL_EVENT_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 260 | if (errorsrc & NRF_UART_ERROR_PARITY_MASK) |
sahilmgandhi | 18:6a4db94011d3 | 261 | { |
sahilmgandhi | 18:6a4db94011d3 | 262 | UART_CB.events_occured |= SERIAL_EVENT_RX_PARITY_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 263 | } |
sahilmgandhi | 18:6a4db94011d3 | 264 | if (errorsrc & NRF_UART_ERROR_FRAMING_MASK) |
sahilmgandhi | 18:6a4db94011d3 | 265 | { |
sahilmgandhi | 18:6a4db94011d3 | 266 | UART_CB.events_occured |= SERIAL_EVENT_RX_FRAMING_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 267 | } |
sahilmgandhi | 18:6a4db94011d3 | 268 | if (errorsrc & NRF_UART_ERROR_OVERRUN_MASK) |
sahilmgandhi | 18:6a4db94011d3 | 269 | { |
sahilmgandhi | 18:6a4db94011d3 | 270 | UART_CB.events_occured |= SERIAL_EVENT_RX_OVERRUN_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 271 | } |
sahilmgandhi | 18:6a4db94011d3 | 272 | UART_CB.rx_asynch_handler(); |
sahilmgandhi | 18:6a4db94011d3 | 273 | } |
sahilmgandhi | 18:6a4db94011d3 | 274 | } |
sahilmgandhi | 18:6a4db94011d3 | 275 | #endif // DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 276 | } |
sahilmgandhi | 18:6a4db94011d3 | 277 | |
sahilmgandhi | 18:6a4db94011d3 | 278 | |
sahilmgandhi | 18:6a4db94011d3 | 279 | void serial_init(serial_t *obj, PinName tx, PinName rx) |
sahilmgandhi | 18:6a4db94011d3 | 280 | { |
sahilmgandhi | 18:6a4db94011d3 | 281 | |
sahilmgandhi | 18:6a4db94011d3 | 282 | NVIC_SetVector(UART0_IRQn, (uint32_t) UART0_IRQHandler); |
sahilmgandhi | 18:6a4db94011d3 | 283 | |
sahilmgandhi | 18:6a4db94011d3 | 284 | |
sahilmgandhi | 18:6a4db94011d3 | 285 | UART_CB.pseltxd = |
sahilmgandhi | 18:6a4db94011d3 | 286 | (tx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)tx; |
sahilmgandhi | 18:6a4db94011d3 | 287 | UART_CB.pselrxd = |
sahilmgandhi | 18:6a4db94011d3 | 288 | (rx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rx; |
sahilmgandhi | 18:6a4db94011d3 | 289 | if (UART_CB.pseltxd != NRF_UART_PSEL_DISCONNECTED) |
sahilmgandhi | 18:6a4db94011d3 | 290 | { |
sahilmgandhi | 18:6a4db94011d3 | 291 | nrf_gpio_pin_set(UART_CB.pseltxd); |
sahilmgandhi | 18:6a4db94011d3 | 292 | nrf_gpio_cfg_output(UART_CB.pseltxd); |
sahilmgandhi | 18:6a4db94011d3 | 293 | } |
sahilmgandhi | 18:6a4db94011d3 | 294 | if (UART_CB.pselrxd != NRF_UART_PSEL_DISCONNECTED) |
sahilmgandhi | 18:6a4db94011d3 | 295 | { |
sahilmgandhi | 18:6a4db94011d3 | 296 | nrf_gpio_cfg_input(UART_CB.pselrxd, NRF_GPIO_PIN_NOPULL); |
sahilmgandhi | 18:6a4db94011d3 | 297 | } |
sahilmgandhi | 18:6a4db94011d3 | 298 | |
sahilmgandhi | 18:6a4db94011d3 | 299 | if (UART_CB.initialized) |
sahilmgandhi | 18:6a4db94011d3 | 300 | { |
sahilmgandhi | 18:6a4db94011d3 | 301 | // For already initialized peripheral it is sufficient to reconfigure |
sahilmgandhi | 18:6a4db94011d3 | 302 | // RX/TX pins only. |
sahilmgandhi | 18:6a4db94011d3 | 303 | |
sahilmgandhi | 18:6a4db94011d3 | 304 | // Ensure that there is no unfinished TX transfer. |
sahilmgandhi | 18:6a4db94011d3 | 305 | while (!serial_writable(obj)) |
sahilmgandhi | 18:6a4db94011d3 | 306 | { |
sahilmgandhi | 18:6a4db94011d3 | 307 | } |
sahilmgandhi | 18:6a4db94011d3 | 308 | // UART pins can be configured only when the peripheral is disabled. |
sahilmgandhi | 18:6a4db94011d3 | 309 | nrf_uart_disable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 310 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
sahilmgandhi | 18:6a4db94011d3 | 311 | nrf_uart_enable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 312 | } |
sahilmgandhi | 18:6a4db94011d3 | 313 | else |
sahilmgandhi | 18:6a4db94011d3 | 314 | { |
sahilmgandhi | 18:6a4db94011d3 | 315 | UART_CB.baudrate = (nrf_uart_baudrate_t)UART_DEFAULT_BAUDRATE; |
sahilmgandhi | 18:6a4db94011d3 | 316 | UART_CB.parity = (nrf_uart_parity_t)UART_DEFAULT_PARITY; |
sahilmgandhi | 18:6a4db94011d3 | 317 | UART_CB.hwfc = (nrf_uart_hwfc_t)UART_DEFAULT_HWFC; |
sahilmgandhi | 18:6a4db94011d3 | 318 | UART_CB.pselcts = UART_DEFAULT_CTS; |
sahilmgandhi | 18:6a4db94011d3 | 319 | UART_CB.pselrts = UART_DEFAULT_RTS; |
sahilmgandhi | 18:6a4db94011d3 | 320 | |
sahilmgandhi | 18:6a4db94011d3 | 321 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 322 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 323 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); |
sahilmgandhi | 18:6a4db94011d3 | 324 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); |
sahilmgandhi | 18:6a4db94011d3 | 325 | |
sahilmgandhi | 18:6a4db94011d3 | 326 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | |
sahilmgandhi | 18:6a4db94011d3 | 327 | NRF_UART_INT_MASK_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 328 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 329 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_ERROR); |
sahilmgandhi | 18:6a4db94011d3 | 330 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 331 | nrf_drv_common_irq_enable(UART_IRQn, NRFx_MBED_UART_IRQ_PRIORITY); |
sahilmgandhi | 18:6a4db94011d3 | 332 | |
sahilmgandhi | 18:6a4db94011d3 | 333 | // TX interrupt needs to be signaled when transmitter buffer is empty, |
sahilmgandhi | 18:6a4db94011d3 | 334 | // so a dummy transmission is needed to get the TXDRDY event initially |
sahilmgandhi | 18:6a4db94011d3 | 335 | // set. |
sahilmgandhi | 18:6a4db94011d3 | 336 | nrf_uart_configure(UART_INSTANCE, |
sahilmgandhi | 18:6a4db94011d3 | 337 | NRF_UART_PARITY_EXCLUDED, NRF_UART_HWFC_DISABLED); |
sahilmgandhi | 18:6a4db94011d3 | 338 | // Use maximum baud rate, so this dummy transmission takes as little |
sahilmgandhi | 18:6a4db94011d3 | 339 | // time as possible. |
sahilmgandhi | 18:6a4db94011d3 | 340 | nrf_uart_baudrate_set(UART_INSTANCE, NRF_UART_BAUDRATE_1000000); |
sahilmgandhi | 18:6a4db94011d3 | 341 | // Perform it with disconnected TX pin, so nothing actually comes out |
sahilmgandhi | 18:6a4db94011d3 | 342 | // of the device. |
sahilmgandhi | 18:6a4db94011d3 | 343 | nrf_uart_txrx_pins_disconnect(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 344 | nrf_uart_hwfc_pins_disconnect(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 345 | nrf_uart_enable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 346 | nrf_uart_txd_set(UART_INSTANCE, 0); |
sahilmgandhi | 18:6a4db94011d3 | 347 | |
sahilmgandhi | 18:6a4db94011d3 | 348 | while (!nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) |
sahilmgandhi | 18:6a4db94011d3 | 349 | { |
sahilmgandhi | 18:6a4db94011d3 | 350 | } |
sahilmgandhi | 18:6a4db94011d3 | 351 | nrf_uart_disable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 352 | |
sahilmgandhi | 18:6a4db94011d3 | 353 | // Now everything is prepared to set the default configuration and |
sahilmgandhi | 18:6a4db94011d3 | 354 | // connect the peripheral to actual pins. |
sahilmgandhi | 18:6a4db94011d3 | 355 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
sahilmgandhi | 18:6a4db94011d3 | 356 | nrf_uart_baudrate_set(UART_INSTANCE, UART_CB.baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 357 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
sahilmgandhi | 18:6a4db94011d3 | 358 | if (UART_CB.hwfc == NRF_UART_HWFC_ENABLED) |
sahilmgandhi | 18:6a4db94011d3 | 359 | { |
sahilmgandhi | 18:6a4db94011d3 | 360 | internal_set_hwfc(FlowControlRTSCTS, |
sahilmgandhi | 18:6a4db94011d3 | 361 | (PinName) UART_CB.pselrts, (PinName) UART_CB.pselcts); |
sahilmgandhi | 18:6a4db94011d3 | 362 | } |
sahilmgandhi | 18:6a4db94011d3 | 363 | |
sahilmgandhi | 18:6a4db94011d3 | 364 | nrf_uart_enable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 365 | |
sahilmgandhi | 18:6a4db94011d3 | 366 | UART_CB.initialized = true; |
sahilmgandhi | 18:6a4db94011d3 | 367 | } |
sahilmgandhi | 18:6a4db94011d3 | 368 | |
sahilmgandhi | 18:6a4db94011d3 | 369 | if (tx == STDIO_UART_TX && rx == STDIO_UART_RX) |
sahilmgandhi | 18:6a4db94011d3 | 370 | { |
sahilmgandhi | 18:6a4db94011d3 | 371 | stdio_uart_inited = 1; |
sahilmgandhi | 18:6a4db94011d3 | 372 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
sahilmgandhi | 18:6a4db94011d3 | 373 | } |
sahilmgandhi | 18:6a4db94011d3 | 374 | else |
sahilmgandhi | 18:6a4db94011d3 | 375 | { |
sahilmgandhi | 18:6a4db94011d3 | 376 | stdio_uart_inited = 0; |
sahilmgandhi | 18:6a4db94011d3 | 377 | } |
sahilmgandhi | 18:6a4db94011d3 | 378 | } |
sahilmgandhi | 18:6a4db94011d3 | 379 | |
sahilmgandhi | 18:6a4db94011d3 | 380 | void serial_free(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 381 | { |
sahilmgandhi | 18:6a4db94011d3 | 382 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 383 | |
sahilmgandhi | 18:6a4db94011d3 | 384 | if (UART_CB.initialized) |
sahilmgandhi | 18:6a4db94011d3 | 385 | { |
sahilmgandhi | 18:6a4db94011d3 | 386 | nrf_uart_disable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 387 | nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | |
sahilmgandhi | 18:6a4db94011d3 | 388 | NRF_UART_INT_MASK_TXDRDY | |
sahilmgandhi | 18:6a4db94011d3 | 389 | NRF_UART_INT_MASK_ERROR); |
sahilmgandhi | 18:6a4db94011d3 | 390 | nrf_drv_common_irq_disable(UART_IRQn); |
sahilmgandhi | 18:6a4db94011d3 | 391 | UART_CB.initialized = false; |
sahilmgandhi | 18:6a4db94011d3 | 392 | |
sahilmgandhi | 18:6a4db94011d3 | 393 | // There is only one UART instance, thus at this point the stdio UART |
sahilmgandhi | 18:6a4db94011d3 | 394 | // can no longer be initialized. |
sahilmgandhi | 18:6a4db94011d3 | 395 | stdio_uart_inited = 0; |
sahilmgandhi | 18:6a4db94011d3 | 396 | } |
sahilmgandhi | 18:6a4db94011d3 | 397 | } |
sahilmgandhi | 18:6a4db94011d3 | 398 | |
sahilmgandhi | 18:6a4db94011d3 | 399 | void serial_baud(serial_t *obj, int baudrate) |
sahilmgandhi | 18:6a4db94011d3 | 400 | { |
sahilmgandhi | 18:6a4db94011d3 | 401 | // nrf_uart_baudrate_set() is not used here (registers are accessed |
sahilmgandhi | 18:6a4db94011d3 | 402 | // directly) to make it possible to set special baud rates like 56000 |
sahilmgandhi | 18:6a4db94011d3 | 403 | // or 31250. |
sahilmgandhi | 18:6a4db94011d3 | 404 | |
sahilmgandhi | 18:6a4db94011d3 | 405 | static uint32_t const acceptedSpeeds[][2] = { |
sahilmgandhi | 18:6a4db94011d3 | 406 | { 1200, UART_BAUDRATE_BAUDRATE_Baud1200 }, |
sahilmgandhi | 18:6a4db94011d3 | 407 | { 2400, UART_BAUDRATE_BAUDRATE_Baud2400 }, |
sahilmgandhi | 18:6a4db94011d3 | 408 | { 4800, UART_BAUDRATE_BAUDRATE_Baud4800 }, |
sahilmgandhi | 18:6a4db94011d3 | 409 | { 9600, UART_BAUDRATE_BAUDRATE_Baud9600 }, |
sahilmgandhi | 18:6a4db94011d3 | 410 | { 14400, UART_BAUDRATE_BAUDRATE_Baud14400 }, |
sahilmgandhi | 18:6a4db94011d3 | 411 | { 19200, UART_BAUDRATE_BAUDRATE_Baud19200 }, |
sahilmgandhi | 18:6a4db94011d3 | 412 | { 28800, UART_BAUDRATE_BAUDRATE_Baud28800 }, |
sahilmgandhi | 18:6a4db94011d3 | 413 | { 31250, (0x00800000UL) /* 31250 baud */ }, |
sahilmgandhi | 18:6a4db94011d3 | 414 | { 38400, UART_BAUDRATE_BAUDRATE_Baud38400 }, |
sahilmgandhi | 18:6a4db94011d3 | 415 | { 56000, (0x00E51000UL) /* 56000 baud */ }, |
sahilmgandhi | 18:6a4db94011d3 | 416 | { 57600, UART_BAUDRATE_BAUDRATE_Baud57600 }, |
sahilmgandhi | 18:6a4db94011d3 | 417 | { 76800, UART_BAUDRATE_BAUDRATE_Baud76800 }, |
sahilmgandhi | 18:6a4db94011d3 | 418 | { 115200, UART_BAUDRATE_BAUDRATE_Baud115200 }, |
sahilmgandhi | 18:6a4db94011d3 | 419 | { 230400, UART_BAUDRATE_BAUDRATE_Baud230400 }, |
sahilmgandhi | 18:6a4db94011d3 | 420 | { 250000, UART_BAUDRATE_BAUDRATE_Baud250000 }, |
sahilmgandhi | 18:6a4db94011d3 | 421 | { 460800, UART_BAUDRATE_BAUDRATE_Baud460800 }, |
sahilmgandhi | 18:6a4db94011d3 | 422 | { 921600, UART_BAUDRATE_BAUDRATE_Baud921600 }, |
sahilmgandhi | 18:6a4db94011d3 | 423 | { 1000000, UART_BAUDRATE_BAUDRATE_Baud1M } |
sahilmgandhi | 18:6a4db94011d3 | 424 | }; |
sahilmgandhi | 18:6a4db94011d3 | 425 | |
sahilmgandhi | 18:6a4db94011d3 | 426 | if (baudrate <= 1200) |
sahilmgandhi | 18:6a4db94011d3 | 427 | { |
sahilmgandhi | 18:6a4db94011d3 | 428 | UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200; |
sahilmgandhi | 18:6a4db94011d3 | 429 | return; |
sahilmgandhi | 18:6a4db94011d3 | 430 | } |
sahilmgandhi | 18:6a4db94011d3 | 431 | |
sahilmgandhi | 18:6a4db94011d3 | 432 | int const item_cnt = sizeof(acceptedSpeeds)/sizeof(acceptedSpeeds[0]); |
sahilmgandhi | 18:6a4db94011d3 | 433 | |
sahilmgandhi | 18:6a4db94011d3 | 434 | for (int i = 1; i < item_cnt; i++) |
sahilmgandhi | 18:6a4db94011d3 | 435 | { |
sahilmgandhi | 18:6a4db94011d3 | 436 | if ((uint32_t)baudrate < acceptedSpeeds[i][0]) |
sahilmgandhi | 18:6a4db94011d3 | 437 | { |
sahilmgandhi | 18:6a4db94011d3 | 438 | UART_INSTANCE->BAUDRATE = acceptedSpeeds[i - 1][1]; |
sahilmgandhi | 18:6a4db94011d3 | 439 | return; |
sahilmgandhi | 18:6a4db94011d3 | 440 | } |
sahilmgandhi | 18:6a4db94011d3 | 441 | } |
sahilmgandhi | 18:6a4db94011d3 | 442 | |
sahilmgandhi | 18:6a4db94011d3 | 443 | UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M; |
sahilmgandhi | 18:6a4db94011d3 | 444 | } |
sahilmgandhi | 18:6a4db94011d3 | 445 | |
sahilmgandhi | 18:6a4db94011d3 | 446 | void serial_format(serial_t *obj, |
sahilmgandhi | 18:6a4db94011d3 | 447 | int data_bits, SerialParity parity, int stop_bits) |
sahilmgandhi | 18:6a4db94011d3 | 448 | { |
sahilmgandhi | 18:6a4db94011d3 | 449 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 450 | |
sahilmgandhi | 18:6a4db94011d3 | 451 | if (data_bits != 8) |
sahilmgandhi | 18:6a4db94011d3 | 452 | { |
sahilmgandhi | 18:6a4db94011d3 | 453 | error("UART supports only 8 data bits.\r\n"); |
sahilmgandhi | 18:6a4db94011d3 | 454 | } |
sahilmgandhi | 18:6a4db94011d3 | 455 | if (stop_bits != 1) |
sahilmgandhi | 18:6a4db94011d3 | 456 | { |
sahilmgandhi | 18:6a4db94011d3 | 457 | error("UART supports only 1 stop bits.\r\n"); |
sahilmgandhi | 18:6a4db94011d3 | 458 | } |
sahilmgandhi | 18:6a4db94011d3 | 459 | if (parity == ParityNone) |
sahilmgandhi | 18:6a4db94011d3 | 460 | { |
sahilmgandhi | 18:6a4db94011d3 | 461 | UART_CB.parity = NRF_UART_PARITY_EXCLUDED; |
sahilmgandhi | 18:6a4db94011d3 | 462 | } |
sahilmgandhi | 18:6a4db94011d3 | 463 | else if (parity == ParityEven) |
sahilmgandhi | 18:6a4db94011d3 | 464 | { |
sahilmgandhi | 18:6a4db94011d3 | 465 | UART_CB.parity = NRF_UART_PARITY_INCLUDED; |
sahilmgandhi | 18:6a4db94011d3 | 466 | } |
sahilmgandhi | 18:6a4db94011d3 | 467 | else |
sahilmgandhi | 18:6a4db94011d3 | 468 | { |
sahilmgandhi | 18:6a4db94011d3 | 469 | error("UART supports only even parity.\r\n"); |
sahilmgandhi | 18:6a4db94011d3 | 470 | } |
sahilmgandhi | 18:6a4db94011d3 | 471 | |
sahilmgandhi | 18:6a4db94011d3 | 472 | // Reconfigure UART peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 473 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
sahilmgandhi | 18:6a4db94011d3 | 474 | } |
sahilmgandhi | 18:6a4db94011d3 | 475 | |
sahilmgandhi | 18:6a4db94011d3 | 476 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) |
sahilmgandhi | 18:6a4db94011d3 | 477 | { |
sahilmgandhi | 18:6a4db94011d3 | 478 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 479 | UART_CB.irq_handler = handler; |
sahilmgandhi | 18:6a4db94011d3 | 480 | UART_CB.irq_context = id; |
sahilmgandhi | 18:6a4db94011d3 | 481 | } |
sahilmgandhi | 18:6a4db94011d3 | 482 | |
sahilmgandhi | 18:6a4db94011d3 | 483 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 484 | { |
sahilmgandhi | 18:6a4db94011d3 | 485 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 486 | if (enable) |
sahilmgandhi | 18:6a4db94011d3 | 487 | { |
sahilmgandhi | 18:6a4db94011d3 | 488 | switch (irq) |
sahilmgandhi | 18:6a4db94011d3 | 489 | { |
sahilmgandhi | 18:6a4db94011d3 | 490 | case RxIrq: |
sahilmgandhi | 18:6a4db94011d3 | 491 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 492 | UART_CB.irq_enabled |= UART_IRQ_RX; |
sahilmgandhi | 18:6a4db94011d3 | 493 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 494 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 495 | break; |
sahilmgandhi | 18:6a4db94011d3 | 496 | |
sahilmgandhi | 18:6a4db94011d3 | 497 | case TxIrq: |
sahilmgandhi | 18:6a4db94011d3 | 498 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 499 | UART_CB.irq_enabled |= UART_IRQ_TX; |
sahilmgandhi | 18:6a4db94011d3 | 500 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 501 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 502 | break; |
sahilmgandhi | 18:6a4db94011d3 | 503 | } |
sahilmgandhi | 18:6a4db94011d3 | 504 | } |
sahilmgandhi | 18:6a4db94011d3 | 505 | else |
sahilmgandhi | 18:6a4db94011d3 | 506 | { |
sahilmgandhi | 18:6a4db94011d3 | 507 | switch (irq) |
sahilmgandhi | 18:6a4db94011d3 | 508 | { |
sahilmgandhi | 18:6a4db94011d3 | 509 | case RxIrq: |
sahilmgandhi | 18:6a4db94011d3 | 510 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 511 | UART_CB.irq_enabled &= ~UART_IRQ_RX; |
sahilmgandhi | 18:6a4db94011d3 | 512 | if (!UART_CB.rx_active) |
sahilmgandhi | 18:6a4db94011d3 | 513 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 514 | { |
sahilmgandhi | 18:6a4db94011d3 | 515 | nrf_uart_int_disable(UART_INSTANCE, |
sahilmgandhi | 18:6a4db94011d3 | 516 | NRF_UART_INT_MASK_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 517 | } |
sahilmgandhi | 18:6a4db94011d3 | 518 | break; |
sahilmgandhi | 18:6a4db94011d3 | 519 | |
sahilmgandhi | 18:6a4db94011d3 | 520 | case TxIrq: |
sahilmgandhi | 18:6a4db94011d3 | 521 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 522 | UART_CB.irq_enabled &= ~UART_IRQ_TX; |
sahilmgandhi | 18:6a4db94011d3 | 523 | if (!UART_CB.tx_active) |
sahilmgandhi | 18:6a4db94011d3 | 524 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 525 | { |
sahilmgandhi | 18:6a4db94011d3 | 526 | nrf_uart_int_disable(UART_INSTANCE, |
sahilmgandhi | 18:6a4db94011d3 | 527 | NRF_UART_INT_MASK_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 528 | } |
sahilmgandhi | 18:6a4db94011d3 | 529 | break; |
sahilmgandhi | 18:6a4db94011d3 | 530 | } |
sahilmgandhi | 18:6a4db94011d3 | 531 | } |
sahilmgandhi | 18:6a4db94011d3 | 532 | } |
sahilmgandhi | 18:6a4db94011d3 | 533 | |
sahilmgandhi | 18:6a4db94011d3 | 534 | int serial_getc(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 535 | { |
sahilmgandhi | 18:6a4db94011d3 | 536 | while (!serial_readable(obj)) |
sahilmgandhi | 18:6a4db94011d3 | 537 | { |
sahilmgandhi | 18:6a4db94011d3 | 538 | } |
sahilmgandhi | 18:6a4db94011d3 | 539 | |
sahilmgandhi | 18:6a4db94011d3 | 540 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 541 | return nrf_uart_rxd_get(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 542 | } |
sahilmgandhi | 18:6a4db94011d3 | 543 | |
sahilmgandhi | 18:6a4db94011d3 | 544 | void serial_putc(serial_t *obj, int c) |
sahilmgandhi | 18:6a4db94011d3 | 545 | { |
sahilmgandhi | 18:6a4db94011d3 | 546 | while (!serial_writable(obj)) |
sahilmgandhi | 18:6a4db94011d3 | 547 | { |
sahilmgandhi | 18:6a4db94011d3 | 548 | } |
sahilmgandhi | 18:6a4db94011d3 | 549 | |
sahilmgandhi | 18:6a4db94011d3 | 550 | nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 551 | nrf_uart_txd_set(UART_INSTANCE, (uint8_t)c); |
sahilmgandhi | 18:6a4db94011d3 | 552 | } |
sahilmgandhi | 18:6a4db94011d3 | 553 | |
sahilmgandhi | 18:6a4db94011d3 | 554 | int serial_readable(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 555 | { |
sahilmgandhi | 18:6a4db94011d3 | 556 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 557 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 558 | if (UART_CB.rx_active) |
sahilmgandhi | 18:6a4db94011d3 | 559 | { |
sahilmgandhi | 18:6a4db94011d3 | 560 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 561 | } |
sahilmgandhi | 18:6a4db94011d3 | 562 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 563 | return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)); |
sahilmgandhi | 18:6a4db94011d3 | 564 | } |
sahilmgandhi | 18:6a4db94011d3 | 565 | |
sahilmgandhi | 18:6a4db94011d3 | 566 | int serial_writable(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 567 | { |
sahilmgandhi | 18:6a4db94011d3 | 568 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 569 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 570 | if (UART_CB.tx_active) |
sahilmgandhi | 18:6a4db94011d3 | 571 | { |
sahilmgandhi | 18:6a4db94011d3 | 572 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 573 | } |
sahilmgandhi | 18:6a4db94011d3 | 574 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 575 | return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)); |
sahilmgandhi | 18:6a4db94011d3 | 576 | } |
sahilmgandhi | 18:6a4db94011d3 | 577 | |
sahilmgandhi | 18:6a4db94011d3 | 578 | void serial_break_set(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 579 | { |
sahilmgandhi | 18:6a4db94011d3 | 580 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 581 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_SUSPEND); |
sahilmgandhi | 18:6a4db94011d3 | 582 | nrf_uart_txrx_pins_disconnect(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 583 | nrf_gpio_pin_clear(UART_CB.pseltxd); |
sahilmgandhi | 18:6a4db94011d3 | 584 | } |
sahilmgandhi | 18:6a4db94011d3 | 585 | |
sahilmgandhi | 18:6a4db94011d3 | 586 | void serial_break_clear(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 587 | { |
sahilmgandhi | 18:6a4db94011d3 | 588 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 589 | nrf_gpio_pin_set(UART_CB.pseltxd); |
sahilmgandhi | 18:6a4db94011d3 | 590 | nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); |
sahilmgandhi | 18:6a4db94011d3 | 591 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); |
sahilmgandhi | 18:6a4db94011d3 | 592 | nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); |
sahilmgandhi | 18:6a4db94011d3 | 593 | } |
sahilmgandhi | 18:6a4db94011d3 | 594 | |
sahilmgandhi | 18:6a4db94011d3 | 595 | |
sahilmgandhi | 18:6a4db94011d3 | 596 | static void internal_set_hwfc(FlowControl type, |
sahilmgandhi | 18:6a4db94011d3 | 597 | PinName rxflow, PinName txflow) |
sahilmgandhi | 18:6a4db94011d3 | 598 | { |
sahilmgandhi | 18:6a4db94011d3 | 599 | UART_CB.pselrts = |
sahilmgandhi | 18:6a4db94011d3 | 600 | ((rxflow == NC) || (type == FlowControlCTS)) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rxflow; |
sahilmgandhi | 18:6a4db94011d3 | 601 | UART_CB.pselcts = |
sahilmgandhi | 18:6a4db94011d3 | 602 | ((txflow == NC) || (type == FlowControlRTS)) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)txflow; |
sahilmgandhi | 18:6a4db94011d3 | 603 | |
sahilmgandhi | 18:6a4db94011d3 | 604 | if (UART_CB.pselrts != NRF_UART_PSEL_DISCONNECTED) |
sahilmgandhi | 18:6a4db94011d3 | 605 | { |
sahilmgandhi | 18:6a4db94011d3 | 606 | nrf_gpio_pin_set(UART_CB.pselrts); |
sahilmgandhi | 18:6a4db94011d3 | 607 | nrf_gpio_cfg_output(UART_CB.pselrts); |
sahilmgandhi | 18:6a4db94011d3 | 608 | } |
sahilmgandhi | 18:6a4db94011d3 | 609 | if (UART_CB.pselcts != NRF_UART_PSEL_DISCONNECTED) |
sahilmgandhi | 18:6a4db94011d3 | 610 | { |
sahilmgandhi | 18:6a4db94011d3 | 611 | nrf_gpio_cfg_input(UART_CB.pselcts, NRF_GPIO_PIN_NOPULL); |
sahilmgandhi | 18:6a4db94011d3 | 612 | } |
sahilmgandhi | 18:6a4db94011d3 | 613 | |
sahilmgandhi | 18:6a4db94011d3 | 614 | UART_CB.hwfc = (nrf_uart_hwfc_t)((type == FlowControlNone)? NRF_UART_HWFC_DISABLED : UART_DEFAULT_CONFIG_HWFC); |
sahilmgandhi | 18:6a4db94011d3 | 615 | |
sahilmgandhi | 18:6a4db94011d3 | 616 | nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); |
sahilmgandhi | 18:6a4db94011d3 | 617 | nrf_uart_hwfc_pins_set(UART_INSTANCE, UART_CB.pselrts, UART_CB.pselcts); |
sahilmgandhi | 18:6a4db94011d3 | 618 | } |
sahilmgandhi | 18:6a4db94011d3 | 619 | |
sahilmgandhi | 18:6a4db94011d3 | 620 | void serial_set_flow_control(serial_t *obj, FlowControl type, |
sahilmgandhi | 18:6a4db94011d3 | 621 | PinName rxflow, PinName txflow) |
sahilmgandhi | 18:6a4db94011d3 | 622 | { |
sahilmgandhi | 18:6a4db94011d3 | 623 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 624 | |
sahilmgandhi | 18:6a4db94011d3 | 625 | nrf_uart_disable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 626 | internal_set_hwfc(type, rxflow, txflow); |
sahilmgandhi | 18:6a4db94011d3 | 627 | nrf_uart_enable(UART_INSTANCE); |
sahilmgandhi | 18:6a4db94011d3 | 628 | } |
sahilmgandhi | 18:6a4db94011d3 | 629 | |
sahilmgandhi | 18:6a4db94011d3 | 630 | |
sahilmgandhi | 18:6a4db94011d3 | 631 | void serial_clear(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 632 | { |
sahilmgandhi | 18:6a4db94011d3 | 633 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 634 | } |
sahilmgandhi | 18:6a4db94011d3 | 635 | |
sahilmgandhi | 18:6a4db94011d3 | 636 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 637 | |
sahilmgandhi | 18:6a4db94011d3 | 638 | int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, |
sahilmgandhi | 18:6a4db94011d3 | 639 | uint8_t tx_width, uint32_t handler, uint32_t event, |
sahilmgandhi | 18:6a4db94011d3 | 640 | DMAUsage hint) |
sahilmgandhi | 18:6a4db94011d3 | 641 | { |
sahilmgandhi | 18:6a4db94011d3 | 642 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 643 | (void)tx_width; |
sahilmgandhi | 18:6a4db94011d3 | 644 | (void)hint; |
sahilmgandhi | 18:6a4db94011d3 | 645 | if (UART_CB.tx_active || !tx_length) |
sahilmgandhi | 18:6a4db94011d3 | 646 | { |
sahilmgandhi | 18:6a4db94011d3 | 647 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 648 | } |
sahilmgandhi | 18:6a4db94011d3 | 649 | |
sahilmgandhi | 18:6a4db94011d3 | 650 | UART_CB.tx_buffer = tx; |
sahilmgandhi | 18:6a4db94011d3 | 651 | UART_CB.tx_length = tx_length; |
sahilmgandhi | 18:6a4db94011d3 | 652 | UART_CB.tx_pos = 0; |
sahilmgandhi | 18:6a4db94011d3 | 653 | UART_CB.tx_asynch_handler = (void(*)())handler; |
sahilmgandhi | 18:6a4db94011d3 | 654 | UART_CB.events_wanted &= ~SERIAL_EVENT_TX_ALL; |
sahilmgandhi | 18:6a4db94011d3 | 655 | UART_CB.events_wanted |= event; |
sahilmgandhi | 18:6a4db94011d3 | 656 | |
sahilmgandhi | 18:6a4db94011d3 | 657 | UART_CB.tx_active = true; |
sahilmgandhi | 18:6a4db94011d3 | 658 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 659 | |
sahilmgandhi | 18:6a4db94011d3 | 660 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 661 | } |
sahilmgandhi | 18:6a4db94011d3 | 662 | |
sahilmgandhi | 18:6a4db94011d3 | 663 | void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, |
sahilmgandhi | 18:6a4db94011d3 | 664 | uint8_t rx_width, uint32_t handler, uint32_t event, |
sahilmgandhi | 18:6a4db94011d3 | 665 | uint8_t char_match, DMAUsage hint) |
sahilmgandhi | 18:6a4db94011d3 | 666 | { |
sahilmgandhi | 18:6a4db94011d3 | 667 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 668 | (void)rx_width; |
sahilmgandhi | 18:6a4db94011d3 | 669 | (void)hint; |
sahilmgandhi | 18:6a4db94011d3 | 670 | if (UART_CB.rx_active || !rx_length) |
sahilmgandhi | 18:6a4db94011d3 | 671 | { |
sahilmgandhi | 18:6a4db94011d3 | 672 | return; |
sahilmgandhi | 18:6a4db94011d3 | 673 | } |
sahilmgandhi | 18:6a4db94011d3 | 674 | |
sahilmgandhi | 18:6a4db94011d3 | 675 | UART_CB.rx_buffer = rx; |
sahilmgandhi | 18:6a4db94011d3 | 676 | UART_CB.rx_length = rx_length; |
sahilmgandhi | 18:6a4db94011d3 | 677 | UART_CB.rx_pos = 0; |
sahilmgandhi | 18:6a4db94011d3 | 678 | UART_CB.rx_asynch_handler = (void(*)())handler; |
sahilmgandhi | 18:6a4db94011d3 | 679 | UART_CB.events_wanted &= ~SERIAL_EVENT_RX_ALL; |
sahilmgandhi | 18:6a4db94011d3 | 680 | UART_CB.events_wanted |= event; |
sahilmgandhi | 18:6a4db94011d3 | 681 | UART_CB.char_match = char_match; |
sahilmgandhi | 18:6a4db94011d3 | 682 | |
sahilmgandhi | 18:6a4db94011d3 | 683 | UART_CB.rx_active = true; |
sahilmgandhi | 18:6a4db94011d3 | 684 | nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); |
sahilmgandhi | 18:6a4db94011d3 | 685 | } |
sahilmgandhi | 18:6a4db94011d3 | 686 | |
sahilmgandhi | 18:6a4db94011d3 | 687 | uint8_t serial_tx_active(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 688 | { |
sahilmgandhi | 18:6a4db94011d3 | 689 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 690 | return UART_CB.tx_active; |
sahilmgandhi | 18:6a4db94011d3 | 691 | } |
sahilmgandhi | 18:6a4db94011d3 | 692 | |
sahilmgandhi | 18:6a4db94011d3 | 693 | uint8_t serial_rx_active(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 694 | { |
sahilmgandhi | 18:6a4db94011d3 | 695 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 696 | return UART_CB.rx_active; |
sahilmgandhi | 18:6a4db94011d3 | 697 | } |
sahilmgandhi | 18:6a4db94011d3 | 698 | |
sahilmgandhi | 18:6a4db94011d3 | 699 | int serial_irq_handler_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 700 | { |
sahilmgandhi | 18:6a4db94011d3 | 701 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 702 | uint32_t events_to_report = UART_CB.events_wanted & UART_CB.events_occured; |
sahilmgandhi | 18:6a4db94011d3 | 703 | UART_CB.events_occured &= (~events_to_report); |
sahilmgandhi | 18:6a4db94011d3 | 704 | return events_to_report; |
sahilmgandhi | 18:6a4db94011d3 | 705 | } |
sahilmgandhi | 18:6a4db94011d3 | 706 | |
sahilmgandhi | 18:6a4db94011d3 | 707 | void serial_tx_abort_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 708 | { |
sahilmgandhi | 18:6a4db94011d3 | 709 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 710 | end_asynch_tx(); |
sahilmgandhi | 18:6a4db94011d3 | 711 | UART_CB.tx_asynch_handler = NULL; |
sahilmgandhi | 18:6a4db94011d3 | 712 | } |
sahilmgandhi | 18:6a4db94011d3 | 713 | |
sahilmgandhi | 18:6a4db94011d3 | 714 | void serial_rx_abort_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 715 | { |
sahilmgandhi | 18:6a4db94011d3 | 716 | (void)obj; |
sahilmgandhi | 18:6a4db94011d3 | 717 | end_asynch_rx(); |
sahilmgandhi | 18:6a4db94011d3 | 718 | UART_CB.rx_asynch_handler = NULL; |
sahilmgandhi | 18:6a4db94011d3 | 719 | } |
sahilmgandhi | 18:6a4db94011d3 | 720 | |
sahilmgandhi | 18:6a4db94011d3 | 721 | #endif // DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 722 | |
sahilmgandhi | 18:6a4db94011d3 | 723 | #endif // DEVICE_SERIAL |