Zakaria ElQotbi / mbed-src

mbed library sources for airmote

Fork of mbed-src by mbed official

targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/serial_api.c@395:bfce16e86ea4, 2014-11-10 (annotated)

Committer:
mbed_official
Date:
Mon Nov 10 07:45:06 2014 +0000
Revision:
395:bfce16e86ea4
Parent:
340:28d1f895c6fe
Child:
407:bbbab616ce8f
Synchronized with git revision 8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b



Full URL: https://github.com/mbedmicro/mbed/commit/8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b/



Targets: LPC176X - Add repeater pinmode

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 85:e1a8e879a6a9 1 /* mbed Microcontroller Library
mbed_official 104:a6a92e2e5a92 2 * Copyright (c) 2013 Nordic Semiconductor
mbed_official 85:e1a8e879a6a9 3 *
mbed_official 85:e1a8e879a6a9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 85:e1a8e879a6a9 5 * you may not use this file except in compliance with the License.
mbed_official 85:e1a8e879a6a9 6 * You may obtain a copy of the License at
mbed_official 85:e1a8e879a6a9 7 *
mbed_official 85:e1a8e879a6a9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 85:e1a8e879a6a9 9 *
mbed_official 85:e1a8e879a6a9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 85:e1a8e879a6a9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 85:e1a8e879a6a9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 85:e1a8e879a6a9 13 * See the License for the specific language governing permissions and
mbed_official 85:e1a8e879a6a9 14 * limitations under the License.
mbed_official 85:e1a8e879a6a9 15 */
mbed_official 85:e1a8e879a6a9 16 // math.h required for floating point operations for baud rate calculation
mbed_official 85:e1a8e879a6a9 17 //#include <math.h>
mbed_official 85:e1a8e879a6a9 18 #include <string.h>
mbed_official 227:7bd0639b8911 19 #include "mbed_assert.h"
mbed_official 85:e1a8e879a6a9 20
mbed_official 85:e1a8e879a6a9 21 #include "serial_api.h"
mbed_official 85:e1a8e879a6a9 22 #include "cmsis.h"
mbed_official 85:e1a8e879a6a9 23 #include "pinmap.h"
mbed_official 227:7bd0639b8911 24
mbed_official 85:e1a8e879a6a9 25 /******************************************************************************
mbed_official 85:e1a8e879a6a9 26 * INITIALIZATION
mbed_official 85:e1a8e879a6a9 27 ******************************************************************************/
mbed_official 85:e1a8e879a6a9 28 #define UART_NUM 1
mbed_official 85:e1a8e879a6a9 29
mbed_official 85:e1a8e879a6a9 30 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 85:e1a8e879a6a9 31 static uart_irq_handler irq_handler;
mbed_official 300:55638feb26a4 32 static uint32_t acceptedSpeeds[16][2] = {{1200, UART_BAUDRATE_BAUDRATE_Baud1200},
mbed_official 300:55638feb26a4 33 {2400, UART_BAUDRATE_BAUDRATE_Baud2400},
mbed_official 300:55638feb26a4 34 {4800, UART_BAUDRATE_BAUDRATE_Baud4800},
mbed_official 300:55638feb26a4 35 {9600, UART_BAUDRATE_BAUDRATE_Baud9600},
mbed_official 300:55638feb26a4 36 {14400, UART_BAUDRATE_BAUDRATE_Baud14400},
mbed_official 300:55638feb26a4 37 {19200, UART_BAUDRATE_BAUDRATE_Baud19200},
mbed_official 300:55638feb26a4 38 {28800, UART_BAUDRATE_BAUDRATE_Baud28800},
mbed_official 300:55638feb26a4 39 {38400, UART_BAUDRATE_BAUDRATE_Baud38400},
mbed_official 300:55638feb26a4 40 {57600, UART_BAUDRATE_BAUDRATE_Baud57600},
mbed_official 300:55638feb26a4 41 {76800, UART_BAUDRATE_BAUDRATE_Baud76800},
mbed_official 300:55638feb26a4 42 {115200, UART_BAUDRATE_BAUDRATE_Baud115200},
mbed_official 300:55638feb26a4 43 {230400, UART_BAUDRATE_BAUDRATE_Baud230400},
mbed_official 300:55638feb26a4 44 {250000, UART_BAUDRATE_BAUDRATE_Baud250000},
mbed_official 300:55638feb26a4 45 {460800, UART_BAUDRATE_BAUDRATE_Baud460800},
mbed_official 300:55638feb26a4 46 {921600, UART_BAUDRATE_BAUDRATE_Baud921600},
mbed_official 300:55638feb26a4 47 {1000000, UART_BAUDRATE_BAUDRATE_Baud1M}};
mbed_official 85:e1a8e879a6a9 48
mbed_official 85:e1a8e879a6a9 49 int stdio_uart_inited = 0;
mbed_official 85:e1a8e879a6a9 50 serial_t stdio_uart;
mbed_official 85:e1a8e879a6a9 51
mbed_official 85:e1a8e879a6a9 52
mbed_official 85:e1a8e879a6a9 53 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 288:17565898c031 54 UARTName uart = UART_0;
mbed_official 85:e1a8e879a6a9 55 obj->uart = (NRF_UART_Type *)uart;
mbed_official 300:55638feb26a4 56
mbed_official 227:7bd0639b8911 57 //pin configurations --
mbed_official 227:7bd0639b8911 58 //outputs
mbed_official 300:55638feb26a4 59 NRF_GPIO->DIR |= (1 << tx); //TX_PIN_NUMBER);
mbed_official 300:55638feb26a4 60 NRF_GPIO->DIR |= (1 << RTS_PIN_NUMBER);
mbed_official 85:e1a8e879a6a9 61
mbed_official 300:55638feb26a4 62 NRF_GPIO->DIR &= ~(1 << rx); //RX_PIN_NUMBER);
mbed_official 300:55638feb26a4 63 NRF_GPIO->DIR &= ~(1 << CTS_PIN_NUMBER);
mbed_official 300:55638feb26a4 64
mbed_official 85:e1a8e879a6a9 65 obj->uart->PSELRTS = RTS_PIN_NUMBER;
mbed_official 300:55638feb26a4 66 obj->uart->PSELTXD = tx; //TX_PIN_NUMBER;
mbed_official 300:55638feb26a4 67
mbed_official 85:e1a8e879a6a9 68 //inputs
mbed_official 85:e1a8e879a6a9 69 obj->uart->PSELCTS = CTS_PIN_NUMBER;
mbed_official 300:55638feb26a4 70 obj->uart->PSELRXD = rx; //RX_PIN_NUMBER;
mbed_official 300:55638feb26a4 71
mbed_official 300:55638feb26a4 72
mbed_official 85:e1a8e879a6a9 73 // set default baud rate and format
mbed_official 85:e1a8e879a6a9 74 serial_baud (obj, 9600);
mbed_official 85:e1a8e879a6a9 75 serial_format(obj, 8, ParityNone, 1);
mbed_official 300:55638feb26a4 76
mbed_official 300:55638feb26a4 77 obj->uart->ENABLE = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);
mbed_official 85:e1a8e879a6a9 78 obj->uart->TASKS_STARTTX = 1;
mbed_official 85:e1a8e879a6a9 79 obj->uart->TASKS_STARTRX = 1;
mbed_official 300:55638feb26a4 80 obj->uart->EVENTS_RXDRDY = 0;
mbed_official 300:55638feb26a4 81
mbed_official 85:e1a8e879a6a9 82 obj->index = 0;
mbed_official 300:55638feb26a4 83
mbed_official 85:e1a8e879a6a9 84 // set rx/tx pins in PullUp mode
mbed_official 339:40bd4701f3e2 85 if (tx != NC) {
mbed_official 339:40bd4701f3e2 86 pin_mode(tx, PullUp);
mbed_official 339:40bd4701f3e2 87 }
mbed_official 339:40bd4701f3e2 88 if (rx != NC) {
mbed_official 339:40bd4701f3e2 89 pin_mode(rx, PullUp);
mbed_official 339:40bd4701f3e2 90 }
mbed_official 300:55638feb26a4 91
mbed_official 85:e1a8e879a6a9 92 if (uart == STDIO_UART) {
mbed_official 85:e1a8e879a6a9 93 stdio_uart_inited = 1;
mbed_official 85:e1a8e879a6a9 94 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 85:e1a8e879a6a9 95 }
mbed_official 85:e1a8e879a6a9 96 }
mbed_official 85:e1a8e879a6a9 97
mbed_official 300:55638feb26a4 98 void serial_free(serial_t *obj)
mbed_official 300:55638feb26a4 99 {
mbed_official 85:e1a8e879a6a9 100 serial_irq_ids[obj->index] = 0;
mbed_official 85:e1a8e879a6a9 101 }
mbed_official 85:e1a8e879a6a9 102
mbed_official 85:e1a8e879a6a9 103 // serial_baud
mbed_official 85:e1a8e879a6a9 104 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 300:55638feb26a4 105 void serial_baud(serial_t *obj, int baudrate)
mbed_official 300:55638feb26a4 106 {
mbed_official 300:55638feb26a4 107 if (baudrate<=1200) {
mbed_official 85:e1a8e879a6a9 108 obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200;
mbed_official 85:e1a8e879a6a9 109 return;
mbed_official 227:7bd0639b8911 110 }
mbed_official 300:55638feb26a4 111
mbed_official 300:55638feb26a4 112 for (int i = 1; i<16; i++) {
mbed_official 300:55638feb26a4 113 if (baudrate<acceptedSpeeds[i][0]) {
mbed_official 300:55638feb26a4 114 obj->uart->BAUDRATE = acceptedSpeeds[i - 1][1];
mbed_official 85:e1a8e879a6a9 115 return;
mbed_official 85:e1a8e879a6a9 116 }
mbed_official 85:e1a8e879a6a9 117 }
mbed_official 85:e1a8e879a6a9 118 obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M;
mbed_official 85:e1a8e879a6a9 119 }
mbed_official 85:e1a8e879a6a9 120
mbed_official 300:55638feb26a4 121 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
mbed_official 300:55638feb26a4 122 {
mbed_official 85:e1a8e879a6a9 123 // 0: 1 stop bits, 1: 2 stop bits
mbed_official 300:55638feb26a4 124 // int parity_enable, parity_select;
mbed_official 85:e1a8e879a6a9 125 switch (parity) {
mbed_official 227:7bd0639b8911 126 case ParityNone:
mbed_official 300:55638feb26a4 127 obj->uart->CONFIG = 0;
mbed_official 300:55638feb26a4 128 break;
mbed_official 85:e1a8e879a6a9 129 default:
mbed_official 300:55638feb26a4 130 obj->uart->CONFIG = (UART_CONFIG_PARITY_Included << UART_CONFIG_PARITY_Pos);
mbed_official 85:e1a8e879a6a9 131 return;
mbed_official 85:e1a8e879a6a9 132 }
mbed_official 85:e1a8e879a6a9 133 //no Flow Control
mbed_official 85:e1a8e879a6a9 134 }
mbed_official 85:e1a8e879a6a9 135
mbed_official 85:e1a8e879a6a9 136 //******************************************************************************
mbed_official 85:e1a8e879a6a9 137 // * INTERRUPT HANDLING
mbed_official 85:e1a8e879a6a9 138 //******************************************************************************
mbed_official 300:55638feb26a4 139 static inline void uart_irq(uint32_t iir, uint32_t index)
mbed_official 300:55638feb26a4 140 {
mbed_official 85:e1a8e879a6a9 141 SerialIrq irq_type;
mbed_official 85:e1a8e879a6a9 142 switch (iir) {
mbed_official 227:7bd0639b8911 143 case 1:
mbed_official 227:7bd0639b8911 144 irq_type = TxIrq;
mbed_official 300:55638feb26a4 145 break;
mbed_official 227:7bd0639b8911 146 case 2:
mbed_official 227:7bd0639b8911 147 irq_type = RxIrq;
mbed_official 300:55638feb26a4 148 break;
mbed_official 300:55638feb26a4 149
mbed_official 300:55638feb26a4 150 default:
mbed_official 300:55638feb26a4 151 return;
mbed_official 85:e1a8e879a6a9 152 }
mbed_official 300:55638feb26a4 153
mbed_official 300:55638feb26a4 154 if (serial_irq_ids[index] != 0) {
mbed_official 85:e1a8e879a6a9 155 irq_handler(serial_irq_ids[index], irq_type);
mbed_official 85:e1a8e879a6a9 156 }
mbed_official 85:e1a8e879a6a9 157 }
mbed_official 300:55638feb26a4 158
mbed_official 85:e1a8e879a6a9 159 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 160 extern "C" {
mbed_official 227:7bd0639b8911 161 #endif
mbed_official 85:e1a8e879a6a9 162 void UART0_IRQHandler()
mbed_official 85:e1a8e879a6a9 163 {
mbed_official 300:55638feb26a4 164 uint32_t irtype = 0;
mbed_official 300:55638feb26a4 165
mbed_official 340:28d1f895c6fe 166 if((NRF_UART0->INTENSET & 0x80) && NRF_UART0->EVENTS_TXDRDY) {
mbed_official 300:55638feb26a4 167 irtype = 1;
mbed_official 340:28d1f895c6fe 168 } else if((NRF_UART0->INTENSET & 0x04) && NRF_UART0->EVENTS_RXDRDY) {
mbed_official 300:55638feb26a4 169 irtype = 2;
mbed_official 85:e1a8e879a6a9 170 }
mbed_official 85:e1a8e879a6a9 171 uart_irq(irtype, 0);
mbed_official 85:e1a8e879a6a9 172 }
mbed_official 300:55638feb26a4 173
mbed_official 85:e1a8e879a6a9 174 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 175 }
mbed_official 227:7bd0639b8911 176 #endif
mbed_official 300:55638feb26a4 177 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
mbed_official 300:55638feb26a4 178 {
mbed_official 300:55638feb26a4 179 irq_handler = handler;
mbed_official 85:e1a8e879a6a9 180 serial_irq_ids[obj->index] = id;
mbed_official 85:e1a8e879a6a9 181 }
mbed_official 85:e1a8e879a6a9 182
mbed_official 300:55638feb26a4 183 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
mbed_official 300:55638feb26a4 184 {
mbed_official 85:e1a8e879a6a9 185 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 85:e1a8e879a6a9 186
mbed_official 85:e1a8e879a6a9 187 switch ((int)obj->uart) {
mbed_official 300:55638feb26a4 188 case UART_0:
mbed_official 300:55638feb26a4 189 irq_n = UART0_IRQn;
mbed_official 85:e1a8e879a6a9 190 break;
mbed_official 85:e1a8e879a6a9 191 }
mbed_official 300:55638feb26a4 192
mbed_official 85:e1a8e879a6a9 193 if (enable) {
mbed_official 85:e1a8e879a6a9 194 switch (irq) {
mbed_official 300:55638feb26a4 195 case RxIrq:
mbed_official 300:55638feb26a4 196 obj->uart->INTENSET |= (UART_INTENSET_RXDRDY_Msk);
mbed_official 300:55638feb26a4 197 break;
mbed_official 300:55638feb26a4 198 case TxIrq:
mbed_official 300:55638feb26a4 199 obj->uart->INTENSET |= (UART_INTENSET_TXDRDY_Msk);
mbed_official 300:55638feb26a4 200 break;
mbed_official 85:e1a8e879a6a9 201 }
mbed_official 85:e1a8e879a6a9 202 NVIC_SetPriority(irq_n, 3);
mbed_official 85:e1a8e879a6a9 203 NVIC_EnableIRQ(irq_n);
mbed_official 300:55638feb26a4 204 } else { // disable
mbed_official 85:e1a8e879a6a9 205 int all_disabled = 0;
mbed_official 85:e1a8e879a6a9 206 switch (irq) {
mbed_official 300:55638feb26a4 207 case RxIrq:
mbed_official 300:55638feb26a4 208 obj->uart->INTENSET &= ~(UART_INTENSET_RXDRDY_Msk);
mbed_official 300:55638feb26a4 209 all_disabled = (obj->uart->INTENSET & (UART_INTENSET_TXDRDY_Msk))==0;
mbed_official 300:55638feb26a4 210 break;
mbed_official 300:55638feb26a4 211 case TxIrq:
mbed_official 300:55638feb26a4 212 obj->uart->INTENSET &= ~(UART_INTENSET_TXDRDY_Msk);
mbed_official 300:55638feb26a4 213 all_disabled = (obj->uart->INTENSET & (UART_INTENSET_RXDRDY_Msk))==0;
mbed_official 300:55638feb26a4 214 break;
mbed_official 85:e1a8e879a6a9 215 }
mbed_official 300:55638feb26a4 216
mbed_official 300:55638feb26a4 217 if (all_disabled) {
mbed_official 85:e1a8e879a6a9 218 NVIC_DisableIRQ(irq_n);
mbed_official 85:e1a8e879a6a9 219 }
mbed_official 85:e1a8e879a6a9 220 }
mbed_official 85:e1a8e879a6a9 221 }
mbed_official 85:e1a8e879a6a9 222
mbed_official 85:e1a8e879a6a9 223 //******************************************************************************
mbed_official 85:e1a8e879a6a9 224 //* READ/WRITE
mbed_official 85:e1a8e879a6a9 225 //******************************************************************************
mbed_official 300:55638feb26a4 226 int serial_getc(serial_t *obj)
mbed_official 300:55638feb26a4 227 {
mbed_official 300:55638feb26a4 228 while (!serial_readable(obj)) {
mbed_official 300:55638feb26a4 229 }
mbed_official 300:55638feb26a4 230
mbed_official 85:e1a8e879a6a9 231 obj->uart->EVENTS_RXDRDY = 0;
mbed_official 300:55638feb26a4 232
mbed_official 85:e1a8e879a6a9 233 return (uint8_t)obj->uart->RXD;
mbed_official 85:e1a8e879a6a9 234 }
mbed_official 85:e1a8e879a6a9 235
mbed_official 300:55638feb26a4 236 void serial_putc(serial_t *obj, int c)
mbed_official 300:55638feb26a4 237 {
mbed_official 85:e1a8e879a6a9 238 obj->uart->TXD = (uint8_t)c;
mbed_official 300:55638feb26a4 239
mbed_official 300:55638feb26a4 240 while (!serial_writable(obj)) {
mbed_official 300:55638feb26a4 241 }
mbed_official 300:55638feb26a4 242
mbed_official 300:55638feb26a4 243 obj->uart->EVENTS_TXDRDY = 0;
mbed_official 85:e1a8e879a6a9 244 }
mbed_official 85:e1a8e879a6a9 245
mbed_official 300:55638feb26a4 246 int serial_readable(serial_t *obj)
mbed_official 300:55638feb26a4 247 {
mbed_official 85:e1a8e879a6a9 248 return (obj->uart->EVENTS_RXDRDY == 1);
mbed_official 85:e1a8e879a6a9 249 }
mbed_official 85:e1a8e879a6a9 250
mbed_official 300:55638feb26a4 251 int serial_writable(serial_t *obj)
mbed_official 300:55638feb26a4 252 {
mbed_official 85:e1a8e879a6a9 253 return (obj->uart->EVENTS_TXDRDY ==1);
mbed_official 85:e1a8e879a6a9 254 }
mbed_official 85:e1a8e879a6a9 255
mbed_official 300:55638feb26a4 256 void serial_break_set(serial_t *obj)
mbed_official 300:55638feb26a4 257 {
mbed_official 85:e1a8e879a6a9 258 obj->uart->TASKS_SUSPEND = 1;
mbed_official 85:e1a8e879a6a9 259 }
mbed_official 85:e1a8e879a6a9 260
mbed_official 300:55638feb26a4 261 void serial_break_clear(serial_t *obj)
mbed_official 300:55638feb26a4 262 {
mbed_official 85:e1a8e879a6a9 263 obj->uart->TASKS_STARTTX = 1;
mbed_official 85:e1a8e879a6a9 264 obj->uart->TASKS_STARTRX = 1;
mbed_official 85:e1a8e879a6a9 265 }
mbed_official 340:28d1f895c6fe 266
mbed_official 340:28d1f895c6fe 267 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
mbed_official 340:28d1f895c6fe 268 {
mbed_official 340:28d1f895c6fe 269
mbed_official 340:28d1f895c6fe 270 if (type == FlowControlRTSCTS || type == FlowControlRTS) {
mbed_official 340:28d1f895c6fe 271 NRF_GPIO->DIR |= (1<<rxflow);
mbed_official 340:28d1f895c6fe 272 pin_mode(rxflow, PullUp);
mbed_official 340:28d1f895c6fe 273 obj->uart->PSELRTS = rxflow;
mbed_official 340:28d1f895c6fe 274
mbed_official 340:28d1f895c6fe 275 obj->uart->CONFIG |= 0x01; // Enable HWFC
mbed_official 340:28d1f895c6fe 276 }
mbed_official 340:28d1f895c6fe 277
mbed_official 340:28d1f895c6fe 278 if (type == FlowControlRTSCTS || type == FlowControlCTS) {
mbed_official 340:28d1f895c6fe 279 NRF_GPIO->DIR &= ~(1<<txflow);
mbed_official 340:28d1f895c6fe 280 pin_mode(txflow, PullUp);
mbed_official 340:28d1f895c6fe 281 obj->uart->PSELCTS = txflow;
mbed_official 340:28d1f895c6fe 282
mbed_official 340:28d1f895c6fe 283 obj->uart->CONFIG |= 0x01; // Enable HWFC;
mbed_official 340:28d1f895c6fe 284 }
mbed_official 340:28d1f895c6fe 285
mbed_official 340:28d1f895c6fe 286 if (type == FlowControlNone) {
mbed_official 340:28d1f895c6fe 287 obj->uart->PSELRTS = 0xFFFFFFFF; // Disable RTS
mbed_official 340:28d1f895c6fe 288 obj->uart->PSELCTS = 0xFFFFFFFF; // Disable CTS
mbed_official 340:28d1f895c6fe 289
mbed_official 340:28d1f895c6fe 290 obj->uart->CONFIG &= ~0x01; // Enable HWFC;
mbed_official 340:28d1f895c6fe 291 }
mbed_official 340:28d1f895c6fe 292 }
mbed_official 340:28d1f895c6fe 293
mbed_official 340:28d1f895c6fe 294 void serial_clear(serial_t *obj) {
mbed_official 340:28d1f895c6fe 295 }