Geremia G / mbed-src

- fix F411 F334 systeminit when HSI used - portinout always read IDR regardless of port direction

Fork of mbed-src by mbed official

targets/hal/TARGET_NORDIC/TARGET_NRF51822/serial_api.c@104:a6a92e2e5a92, 2014-02-21 (annotated)

Committer:
mbed_official
Date:
Fri Feb 21 12:15:10 2014 +0000
Revision:
104:a6a92e2e5a92
Parent:
85:e1a8e879a6a9
Child:
227:7bd0639b8911
Synchronized with git revision 195a50befc6da080be0051d0d9bc0838f6cb873e



Full URL: https://github.com/mbedmicro/mbed/commit/195a50befc6da080be0051d0d9bc0838f6cb873e/



nrf-mbed merge

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 85:e1a8e879a6a9 19
mbed_official 85:e1a8e879a6a9 20 #include "serial_api.h"
mbed_official 85:e1a8e879a6a9 21 #include "cmsis.h"
mbed_official 85:e1a8e879a6a9 22 #include "pinmap.h"
mbed_official 85:e1a8e879a6a9 23 #include "error.h"
mbed_official 85:e1a8e879a6a9 24 /******************************************************************************
mbed_official 85:e1a8e879a6a9 25 * INITIALIZATION
mbed_official 85:e1a8e879a6a9 26 ******************************************************************************/
mbed_official 85:e1a8e879a6a9 27 #define UART_NUM 1
mbed_official 85:e1a8e879a6a9 28
mbed_official 85:e1a8e879a6a9 29 static const PinMap PinMap_UART_TX[] = {
mbed_official 85:e1a8e879a6a9 30 {TX_PIN_NUMBER, UART_0, 1},
mbed_official 85:e1a8e879a6a9 31 { NC , NC , 0}
mbed_official 85:e1a8e879a6a9 32 };
mbed_official 85:e1a8e879a6a9 33
mbed_official 85:e1a8e879a6a9 34 static const PinMap PinMap_UART_RX[] = {
mbed_official 85:e1a8e879a6a9 35 {RX_PIN_NUMBER, UART_0, 1},
mbed_official 85:e1a8e879a6a9 36 {NC , NC , 0}
mbed_official 85:e1a8e879a6a9 37 };
mbed_official 85:e1a8e879a6a9 38
mbed_official 85:e1a8e879a6a9 39 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 85:e1a8e879a6a9 40 static uart_irq_handler irq_handler;
mbed_official 85:e1a8e879a6a9 41 static uint32_t acceptedSpeeds[16][2] = {{1200,UART_BAUDRATE_BAUDRATE_Baud1200},
mbed_official 85:e1a8e879a6a9 42 {2400,UART_BAUDRATE_BAUDRATE_Baud2400},
mbed_official 85:e1a8e879a6a9 43 {4800,UART_BAUDRATE_BAUDRATE_Baud4800},
mbed_official 85:e1a8e879a6a9 44 {9600,UART_BAUDRATE_BAUDRATE_Baud9600},
mbed_official 85:e1a8e879a6a9 45 {14400,UART_BAUDRATE_BAUDRATE_Baud14400},
mbed_official 85:e1a8e879a6a9 46 {19200,UART_BAUDRATE_BAUDRATE_Baud19200},
mbed_official 85:e1a8e879a6a9 47 {28800,UART_BAUDRATE_BAUDRATE_Baud28800},
mbed_official 85:e1a8e879a6a9 48 {38400,UART_BAUDRATE_BAUDRATE_Baud38400},
mbed_official 85:e1a8e879a6a9 49 {57600,UART_BAUDRATE_BAUDRATE_Baud57600},
mbed_official 85:e1a8e879a6a9 50 {76800,UART_BAUDRATE_BAUDRATE_Baud76800},
mbed_official 85:e1a8e879a6a9 51 {115200,UART_BAUDRATE_BAUDRATE_Baud115200},
mbed_official 85:e1a8e879a6a9 52 {230400,UART_BAUDRATE_BAUDRATE_Baud230400},
mbed_official 85:e1a8e879a6a9 53 {250000,UART_BAUDRATE_BAUDRATE_Baud250000},
mbed_official 85:e1a8e879a6a9 54 {460800,UART_BAUDRATE_BAUDRATE_Baud460800},
mbed_official 85:e1a8e879a6a9 55 {921600,UART_BAUDRATE_BAUDRATE_Baud921600},
mbed_official 85:e1a8e879a6a9 56 {1000000,UART_BAUDRATE_BAUDRATE_Baud1M}};
mbed_official 85:e1a8e879a6a9 57
mbed_official 85:e1a8e879a6a9 58 int stdio_uart_inited = 0;
mbed_official 85:e1a8e879a6a9 59 serial_t stdio_uart;
mbed_official 85:e1a8e879a6a9 60
mbed_official 85:e1a8e879a6a9 61
mbed_official 85:e1a8e879a6a9 62 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 85:e1a8e879a6a9 63 // determine the UART to use -- for mcu's with multiple uart connections
mbed_official 85:e1a8e879a6a9 64 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 85:e1a8e879a6a9 65 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 85:e1a8e879a6a9 66 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 85:e1a8e879a6a9 67
mbed_official 85:e1a8e879a6a9 68 if ((int)uart == NC) {
mbed_official 85:e1a8e879a6a9 69 error("Serial pinout mapping failed");
mbed_official 85:e1a8e879a6a9 70 }
mbed_official 85:e1a8e879a6a9 71
mbed_official 85:e1a8e879a6a9 72 obj->uart = (NRF_UART_Type *)uart;
mbed_official 85:e1a8e879a6a9 73
mbed_official 85:e1a8e879a6a9 74 //pin configurations --
mbed_official 85:e1a8e879a6a9 75 //outputs
mbed_official 85:e1a8e879a6a9 76 NRF_GPIO->DIR |= (1<<tx);//TX_PIN_NUMBER);
mbed_official 85:e1a8e879a6a9 77 NRF_GPIO->DIR |= (1<<RTS_PIN_NUMBER);
mbed_official 85:e1a8e879a6a9 78
mbed_official 85:e1a8e879a6a9 79 NRF_GPIO->DIR &= ~(1<<rx);//RX_PIN_NUMBER);
mbed_official 85:e1a8e879a6a9 80 NRF_GPIO->DIR &= ~(1<<CTS_PIN_NUMBER);
mbed_official 85:e1a8e879a6a9 81
mbed_official 85:e1a8e879a6a9 82 obj->uart->PSELRTS = RTS_PIN_NUMBER;
mbed_official 85:e1a8e879a6a9 83 obj->uart->PSELTXD = tx;//TX_PIN_NUMBER;
mbed_official 85:e1a8e879a6a9 84
mbed_official 85:e1a8e879a6a9 85 //inputs
mbed_official 85:e1a8e879a6a9 86 obj->uart->PSELCTS = CTS_PIN_NUMBER;
mbed_official 85:e1a8e879a6a9 87 obj->uart->PSELRXD = rx;//RX_PIN_NUMBER;
mbed_official 85:e1a8e879a6a9 88
mbed_official 85:e1a8e879a6a9 89
mbed_official 85:e1a8e879a6a9 90 // set default baud rate and format
mbed_official 85:e1a8e879a6a9 91 serial_baud (obj, 9600);
mbed_official 85:e1a8e879a6a9 92 serial_format(obj, 8, ParityNone, 1);
mbed_official 85:e1a8e879a6a9 93
mbed_official 85:e1a8e879a6a9 94 obj->uart->ENABLE = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos);;
mbed_official 85:e1a8e879a6a9 95 obj->uart->TASKS_STARTTX = 1;
mbed_official 85:e1a8e879a6a9 96 obj->uart->TASKS_STARTRX = 1;
mbed_official 85:e1a8e879a6a9 97 obj->uart->EVENTS_RXDRDY =0;
mbed_official 85:e1a8e879a6a9 98
mbed_official 85:e1a8e879a6a9 99 obj->index = 0;
mbed_official 85:e1a8e879a6a9 100
mbed_official 85:e1a8e879a6a9 101 // set rx/tx pins in PullUp mode
mbed_official 85:e1a8e879a6a9 102 pin_mode(tx, PullUp);
mbed_official 85:e1a8e879a6a9 103 pin_mode(rx, PullUp);
mbed_official 85:e1a8e879a6a9 104
mbed_official 85:e1a8e879a6a9 105 if (uart == STDIO_UART) {
mbed_official 85:e1a8e879a6a9 106 stdio_uart_inited = 1;
mbed_official 85:e1a8e879a6a9 107 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 85:e1a8e879a6a9 108 }
mbed_official 85:e1a8e879a6a9 109 }
mbed_official 85:e1a8e879a6a9 110
mbed_official 85:e1a8e879a6a9 111 void serial_free(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 112 serial_irq_ids[obj->index] = 0;
mbed_official 85:e1a8e879a6a9 113 }
mbed_official 85:e1a8e879a6a9 114
mbed_official 85:e1a8e879a6a9 115 // serial_baud
mbed_official 85:e1a8e879a6a9 116 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 85:e1a8e879a6a9 117 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 85:e1a8e879a6a9 118 if(baudrate<=1200){
mbed_official 85:e1a8e879a6a9 119 obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200;
mbed_official 85:e1a8e879a6a9 120 return;
mbed_official 85:e1a8e879a6a9 121 }
mbed_official 85:e1a8e879a6a9 122
mbed_official 85:e1a8e879a6a9 123 for(int i=1;i<16;i++){
mbed_official 85:e1a8e879a6a9 124 if(baudrate<acceptedSpeeds[i][0]){
mbed_official 85:e1a8e879a6a9 125 obj->uart->BAUDRATE = acceptedSpeeds[i-1][1];
mbed_official 85:e1a8e879a6a9 126 return;
mbed_official 85:e1a8e879a6a9 127 }
mbed_official 85:e1a8e879a6a9 128 }
mbed_official 85:e1a8e879a6a9 129 obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M;
mbed_official 85:e1a8e879a6a9 130 }
mbed_official 85:e1a8e879a6a9 131
mbed_official 85:e1a8e879a6a9 132 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 85:e1a8e879a6a9 133 // 0: 1 stop bits, 1: 2 stop bits
mbed_official 85:e1a8e879a6a9 134 // int parity_enable, parity_select;
mbed_official 85:e1a8e879a6a9 135 switch (parity) {
mbed_official 85:e1a8e879a6a9 136 case ParityNone:
mbed_official 85:e1a8e879a6a9 137 obj->uart->CONFIG = 0;
mbed_official 85:e1a8e879a6a9 138 break;
mbed_official 85:e1a8e879a6a9 139 default:
mbed_official 85:e1a8e879a6a9 140 obj->uart->CONFIG = (UART_CONFIG_PARITY_Included<<UART_CONFIG_PARITY_Pos);
mbed_official 85:e1a8e879a6a9 141 return;
mbed_official 85:e1a8e879a6a9 142 }
mbed_official 85:e1a8e879a6a9 143 //no Flow Control
mbed_official 85:e1a8e879a6a9 144 }
mbed_official 85:e1a8e879a6a9 145
mbed_official 85:e1a8e879a6a9 146 //******************************************************************************
mbed_official 85:e1a8e879a6a9 147 // * INTERRUPT HANDLING
mbed_official 85:e1a8e879a6a9 148 //******************************************************************************
mbed_official 85:e1a8e879a6a9 149 static inline void uart_irq(uint32_t iir, uint32_t index) {
mbed_official 85:e1a8e879a6a9 150 SerialIrq irq_type;
mbed_official 85:e1a8e879a6a9 151 switch (iir) {
mbed_official 85:e1a8e879a6a9 152 case 1:
mbed_official 85:e1a8e879a6a9 153 irq_type = TxIrq;
mbed_official 85:e1a8e879a6a9 154 break;
mbed_official 85:e1a8e879a6a9 155 case 2:
mbed_official 85:e1a8e879a6a9 156 irq_type = RxIrq;
mbed_official 85:e1a8e879a6a9 157 break;
mbed_official 85:e1a8e879a6a9 158
mbed_official 85:e1a8e879a6a9 159 default: return;
mbed_official 85:e1a8e879a6a9 160 }
mbed_official 85:e1a8e879a6a9 161
mbed_official 85:e1a8e879a6a9 162 if (serial_irq_ids[index] != 0){
mbed_official 85:e1a8e879a6a9 163 irq_handler(serial_irq_ids[index], irq_type);
mbed_official 85:e1a8e879a6a9 164 }
mbed_official 85:e1a8e879a6a9 165 }
mbed_official 85:e1a8e879a6a9 166 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 167 extern "C" {
mbed_official 85:e1a8e879a6a9 168 #endif
mbed_official 85:e1a8e879a6a9 169 void UART0_IRQHandler()
mbed_official 85:e1a8e879a6a9 170 {
mbed_official 85:e1a8e879a6a9 171 uint32_t irtype =0;
mbed_official 85:e1a8e879a6a9 172
mbed_official 85:e1a8e879a6a9 173 if(NRF_UART0->EVENTS_TXDRDY){
mbed_official 85:e1a8e879a6a9 174 irtype =1;
mbed_official 85:e1a8e879a6a9 175 }
mbed_official 85:e1a8e879a6a9 176 else if(NRF_UART0->EVENTS_RXDRDY){
mbed_official 85:e1a8e879a6a9 177 irtype =2;
mbed_official 85:e1a8e879a6a9 178 }
mbed_official 85:e1a8e879a6a9 179 uart_irq(irtype, 0);
mbed_official 85:e1a8e879a6a9 180 }
mbed_official 85:e1a8e879a6a9 181 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 182 }
mbed_official 85:e1a8e879a6a9 183 #endif
mbed_official 85:e1a8e879a6a9 184 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 85:e1a8e879a6a9 185 irq_handler = handler;
mbed_official 85:e1a8e879a6a9 186 serial_irq_ids[obj->index] = id;
mbed_official 85:e1a8e879a6a9 187 }
mbed_official 85:e1a8e879a6a9 188
mbed_official 85:e1a8e879a6a9 189 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 85:e1a8e879a6a9 190 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 85:e1a8e879a6a9 191
mbed_official 85:e1a8e879a6a9 192 switch ((int)obj->uart) {
mbed_official 85:e1a8e879a6a9 193 case UART_0: irq_n=UART0_IRQn ;
mbed_official 85:e1a8e879a6a9 194 break;
mbed_official 85:e1a8e879a6a9 195 }
mbed_official 85:e1a8e879a6a9 196
mbed_official 85:e1a8e879a6a9 197 if (enable) {
mbed_official 85:e1a8e879a6a9 198 switch (irq) {
mbed_official 85:e1a8e879a6a9 199 case RxIrq: obj->uart->INTENSET |= (UART_INTENSET_RXDRDY_Msk);break;
mbed_official 85:e1a8e879a6a9 200 case TxIrq: obj->uart->INTENSET |= (UART_INTENSET_TXDRDY_Msk);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 85:e1a8e879a6a9 204 }
mbed_official 85:e1a8e879a6a9 205 else { // disable
mbed_official 85:e1a8e879a6a9 206 int all_disabled = 0;
mbed_official 85:e1a8e879a6a9 207 switch (irq) {
mbed_official 85:e1a8e879a6a9 208 case RxIrq: obj->uart->INTENSET &= ~(UART_INTENSET_RXDRDY_Msk);
mbed_official 85:e1a8e879a6a9 209 all_disabled = (obj->uart->INTENSET& (UART_INTENSET_TXDRDY_Msk))==0;
mbed_official 85:e1a8e879a6a9 210 break;
mbed_official 85:e1a8e879a6a9 211 case TxIrq: obj->uart->INTENSET &= ~(UART_INTENSET_TXDRDY_Msk);
mbed_official 85:e1a8e879a6a9 212 all_disabled = (obj->uart->INTENSET& (UART_INTENSET_RXDRDY_Msk))==0;
mbed_official 85:e1a8e879a6a9 213 break;
mbed_official 85:e1a8e879a6a9 214 }
mbed_official 85:e1a8e879a6a9 215
mbed_official 85:e1a8e879a6a9 216 if (all_disabled){
mbed_official 85:e1a8e879a6a9 217 NVIC_DisableIRQ(irq_n);
mbed_official 85:e1a8e879a6a9 218 }
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 //* READ/WRITE
mbed_official 85:e1a8e879a6a9 224 //******************************************************************************
mbed_official 85:e1a8e879a6a9 225 int serial_getc(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 226 while (!serial_readable(obj));
mbed_official 85:e1a8e879a6a9 227
mbed_official 85:e1a8e879a6a9 228 obj->uart->EVENTS_RXDRDY = 0;
mbed_official 85:e1a8e879a6a9 229
mbed_official 85:e1a8e879a6a9 230 return (uint8_t)obj->uart->RXD;
mbed_official 85:e1a8e879a6a9 231 }
mbed_official 85:e1a8e879a6a9 232
mbed_official 85:e1a8e879a6a9 233 void serial_putc(serial_t *obj, int c) {
mbed_official 85:e1a8e879a6a9 234 obj->uart->TXD = (uint8_t)c;
mbed_official 85:e1a8e879a6a9 235
mbed_official 85:e1a8e879a6a9 236 while (!serial_writable(obj));
mbed_official 85:e1a8e879a6a9 237
mbed_official 85:e1a8e879a6a9 238 obj->uart->EVENTS_TXDRDY =0;
mbed_official 85:e1a8e879a6a9 239 }
mbed_official 85:e1a8e879a6a9 240
mbed_official 85:e1a8e879a6a9 241 int serial_readable(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 242 return (obj->uart->EVENTS_RXDRDY == 1);
mbed_official 85:e1a8e879a6a9 243 }
mbed_official 85:e1a8e879a6a9 244
mbed_official 85:e1a8e879a6a9 245 int serial_writable(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 246 return (obj->uart->EVENTS_TXDRDY ==1);
mbed_official 85:e1a8e879a6a9 247 }
mbed_official 85:e1a8e879a6a9 248
mbed_official 85:e1a8e879a6a9 249 void serial_break_set(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 250 obj->uart->TASKS_SUSPEND = 1;
mbed_official 85:e1a8e879a6a9 251 }
mbed_official 85:e1a8e879a6a9 252
mbed_official 85:e1a8e879a6a9 253 void serial_break_clear(serial_t *obj) {
mbed_official 85:e1a8e879a6a9 254 obj->uart->TASKS_STARTTX = 1;
mbed_official 85:e1a8e879a6a9 255 obj->uart->TASKS_STARTRX = 1;
mbed_official 85:e1a8e879a6a9 256 }