shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/serial_api.c@82:0b31dbcd4769, 2014-01-31 (annotated)

Committer:
mbed_official
Date:
Fri Jan 31 10:00:06 2014 +0000
Revision:
82:0b31dbcd4769
Child:
158:3121b9889f7b
Synchronized with git revision 74409cbd593d1daab530a57baaa563f30b04b018



Full URL: https://github.com/mbedmicro/mbed/commit/74409cbd593d1daab530a57baaa563f30b04b018/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 82:0b31dbcd4769 16 #include "serial_api.h"
mbed_official 82:0b31dbcd4769 17
mbed_official 82:0b31dbcd4769 18 // math.h required for floating point operations for baud rate calculation
mbed_official 82:0b31dbcd4769 19 #include <math.h>
mbed_official 82:0b31dbcd4769 20
mbed_official 82:0b31dbcd4769 21 #include <string.h>
mbed_official 82:0b31dbcd4769 22
mbed_official 82:0b31dbcd4769 23 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 24 #include "pinmap.h"
mbed_official 82:0b31dbcd4769 25 #include "error.h"
mbed_official 82:0b31dbcd4769 26 #include "clk_freqs.h"
mbed_official 82:0b31dbcd4769 27 #include "PeripheralPins.h"
mbed_official 82:0b31dbcd4769 28
mbed_official 82:0b31dbcd4769 29 //Devices either user UART0 or UARTLP
mbed_official 82:0b31dbcd4769 30 #ifndef UARTLP_BASES
mbed_official 82:0b31dbcd4769 31 #define UARTLP_C2_RE_MASK UART0_C2_RE_MASK
mbed_official 82:0b31dbcd4769 32 #define UARTLP_C2_TE_MASK UART0_C2_TE_MASK
mbed_official 82:0b31dbcd4769 33 #define UARTLP_BDH_SBNS_MASK UART0_BDH_SBNS_MASK
mbed_official 82:0b31dbcd4769 34 #define UARTLP_BDH_SBNS_SHIFT UART0_BDH_SBNS_SHIFT
mbed_official 82:0b31dbcd4769 35 #define UARTLP_S1_TDRE_MASK UART0_S1_TDRE_MASK
mbed_official 82:0b31dbcd4769 36 #define UARTLP_S1_OR_MASK UART0_S1_OR_MASK
mbed_official 82:0b31dbcd4769 37 #define UARTLP_C2_RIE_MASK UART0_C2_RIE_MASK
mbed_official 82:0b31dbcd4769 38 #define UARTLP_C2_TIE_MASK UART0_C2_TIE_MASK
mbed_official 82:0b31dbcd4769 39 #define UARTLP_C2_SBK_MASK UART0_C2_SBK_MASK
mbed_official 82:0b31dbcd4769 40 #define UARTLP_S1_RDRF_MASK UART0_S1_RDRF_MASK
mbed_official 82:0b31dbcd4769 41 #endif
mbed_official 82:0b31dbcd4769 42
mbed_official 82:0b31dbcd4769 43 #ifdef UART2
mbed_official 82:0b31dbcd4769 44 #define UART_NUM 3
mbed_official 82:0b31dbcd4769 45 #else
mbed_official 82:0b31dbcd4769 46 #define UART_NUM 1
mbed_official 82:0b31dbcd4769 47 #endif
mbed_official 82:0b31dbcd4769 48
mbed_official 82:0b31dbcd4769 49 /******************************************************************************
mbed_official 82:0b31dbcd4769 50 * INITIALIZATION
mbed_official 82:0b31dbcd4769 51 ******************************************************************************/
mbed_official 82:0b31dbcd4769 52
mbed_official 82:0b31dbcd4769 53 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 82:0b31dbcd4769 54 static uart_irq_handler irq_handler;
mbed_official 82:0b31dbcd4769 55
mbed_official 82:0b31dbcd4769 56 int stdio_uart_inited = 0;
mbed_official 82:0b31dbcd4769 57 serial_t stdio_uart;
mbed_official 82:0b31dbcd4769 58
mbed_official 82:0b31dbcd4769 59 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 82:0b31dbcd4769 60 // determine the UART to use
mbed_official 82:0b31dbcd4769 61 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 62 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 82:0b31dbcd4769 63 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 82:0b31dbcd4769 64 if ((int)uart == NC) {
mbed_official 82:0b31dbcd4769 65 error("Serial pinout mapping failed");
mbed_official 82:0b31dbcd4769 66 }
mbed_official 82:0b31dbcd4769 67
mbed_official 82:0b31dbcd4769 68 obj->uart = (UARTLP_Type *)uart;
mbed_official 82:0b31dbcd4769 69 // enable clk
mbed_official 82:0b31dbcd4769 70 switch (uart) {
mbed_official 82:0b31dbcd4769 71 case UART_0: if (mcgpllfll_frequency() != 0) //PLL/FLL is selected
mbed_official 82:0b31dbcd4769 72 SIM->SOPT2 |= (1<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 82:0b31dbcd4769 73 else
mbed_official 82:0b31dbcd4769 74 SIM->SOPT2 |= (2<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 82:0b31dbcd4769 75 SIM->SCGC4 |= SIM_SCGC4_UART0_MASK; break;
mbed_official 82:0b31dbcd4769 76 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 77 case UART_1: SIM->SCGC4 |= SIM_SCGC4_UART1_MASK; break;
mbed_official 82:0b31dbcd4769 78 case UART_2: SIM->SCGC4 |= SIM_SCGC4_UART2_MASK; break;
mbed_official 82:0b31dbcd4769 79 #endif
mbed_official 82:0b31dbcd4769 80 }
mbed_official 82:0b31dbcd4769 81 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 82 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 83
mbed_official 82:0b31dbcd4769 84 switch (uart) {
mbed_official 82:0b31dbcd4769 85 case UART_0: obj->index = 0; break;
mbed_official 82:0b31dbcd4769 86 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 87 case UART_1: obj->index = 1; break;
mbed_official 82:0b31dbcd4769 88 case UART_2: obj->index = 2; break;
mbed_official 82:0b31dbcd4769 89 #endif
mbed_official 82:0b31dbcd4769 90 }
mbed_official 82:0b31dbcd4769 91
mbed_official 82:0b31dbcd4769 92 // set default baud rate and format
mbed_official 82:0b31dbcd4769 93 serial_baud (obj, 9600);
mbed_official 82:0b31dbcd4769 94 serial_format(obj, 8, ParityNone, 1);
mbed_official 82:0b31dbcd4769 95
mbed_official 82:0b31dbcd4769 96 // pinout the chosen uart
mbed_official 82:0b31dbcd4769 97 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 98 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 82:0b31dbcd4769 99
mbed_official 82:0b31dbcd4769 100 // set rx/tx pins in PullUp mode
mbed_official 82:0b31dbcd4769 101 pin_mode(tx, PullUp);
mbed_official 82:0b31dbcd4769 102 pin_mode(rx, PullUp);
mbed_official 82:0b31dbcd4769 103
mbed_official 82:0b31dbcd4769 104 obj->uart->C2 |= (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 105
mbed_official 82:0b31dbcd4769 106 if (uart == STDIO_UART) {
mbed_official 82:0b31dbcd4769 107 stdio_uart_inited = 1;
mbed_official 82:0b31dbcd4769 108 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 82:0b31dbcd4769 109 }
mbed_official 82:0b31dbcd4769 110 }
mbed_official 82:0b31dbcd4769 111
mbed_official 82:0b31dbcd4769 112 void serial_free(serial_t *obj) {
mbed_official 82:0b31dbcd4769 113 serial_irq_ids[obj->index] = 0;
mbed_official 82:0b31dbcd4769 114 }
mbed_official 82:0b31dbcd4769 115
mbed_official 82:0b31dbcd4769 116 // serial_baud
mbed_official 82:0b31dbcd4769 117 //
mbed_official 82:0b31dbcd4769 118 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 82:0b31dbcd4769 119 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 82:0b31dbcd4769 120
mbed_official 82:0b31dbcd4769 121 // save C2 state
mbed_official 82:0b31dbcd4769 122 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 82:0b31dbcd4769 123
mbed_official 82:0b31dbcd4769 124 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 125 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 126
mbed_official 82:0b31dbcd4769 127 uint32_t PCLK;
mbed_official 82:0b31dbcd4769 128 if (obj->uart == UART0) {
mbed_official 82:0b31dbcd4769 129 if (mcgpllfll_frequency() != 0)
mbed_official 82:0b31dbcd4769 130 PCLK = mcgpllfll_frequency();
mbed_official 82:0b31dbcd4769 131 else
mbed_official 82:0b31dbcd4769 132 PCLK = extosc_frequency();
mbed_official 82:0b31dbcd4769 133 } else
mbed_official 82:0b31dbcd4769 134 PCLK = bus_frequency();
mbed_official 82:0b31dbcd4769 135
mbed_official 82:0b31dbcd4769 136 // First we check to see if the basic divide with no DivAddVal/MulVal
mbed_official 82:0b31dbcd4769 137 // ratio gives us an integer result. If it does, we set DivAddVal = 0,
mbed_official 82:0b31dbcd4769 138 // MulVal = 1. Otherwise, we search the valid ratio value range to find
mbed_official 82:0b31dbcd4769 139 // the closest match. This could be more elegant, using search methods
mbed_official 82:0b31dbcd4769 140 // and/or lookup tables, but the brute force method is not that much
mbed_official 82:0b31dbcd4769 141 // slower, and is more maintainable.
mbed_official 82:0b31dbcd4769 142 uint16_t DL = PCLK / (16 * baudrate);
mbed_official 82:0b31dbcd4769 143
mbed_official 82:0b31dbcd4769 144 // set BDH and BDL
mbed_official 82:0b31dbcd4769 145 obj->uart->BDH = (obj->uart->BDH & ~(0x1f)) | ((DL >> 8) & 0x1f);
mbed_official 82:0b31dbcd4769 146 obj->uart->BDL = (obj->uart->BDL & ~(0xff)) | ((DL >> 0) & 0xff);
mbed_official 82:0b31dbcd4769 147
mbed_official 82:0b31dbcd4769 148 // restore C2 state
mbed_official 82:0b31dbcd4769 149 obj->uart->C2 |= c2_state;
mbed_official 82:0b31dbcd4769 150 }
mbed_official 82:0b31dbcd4769 151
mbed_official 82:0b31dbcd4769 152 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 82:0b31dbcd4769 153
mbed_official 82:0b31dbcd4769 154 // save C2 state
mbed_official 82:0b31dbcd4769 155 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 82:0b31dbcd4769 156
mbed_official 82:0b31dbcd4769 157 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 158 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 159
mbed_official 82:0b31dbcd4769 160 // TODO: Support other number of data bits (also in the write method!)
mbed_official 82:0b31dbcd4769 161 if ((data_bits < 8) || (data_bits > 8)) {
mbed_official 82:0b31dbcd4769 162 error("Invalid number of bits (%d) in serial format, should be 8\r\n", data_bits);
mbed_official 82:0b31dbcd4769 163 }
mbed_official 82:0b31dbcd4769 164
mbed_official 82:0b31dbcd4769 165 uint8_t parity_enable, parity_select;
mbed_official 82:0b31dbcd4769 166 switch (parity) {
mbed_official 82:0b31dbcd4769 167 case ParityNone: parity_enable = 0; parity_select = 0; break;
mbed_official 82:0b31dbcd4769 168 case ParityOdd : parity_enable = 1; parity_select = 1; data_bits++; break;
mbed_official 82:0b31dbcd4769 169 case ParityEven: parity_enable = 1; parity_select = 0; data_bits++; break;
mbed_official 82:0b31dbcd4769 170 default:
mbed_official 82:0b31dbcd4769 171 error("Invalid serial parity setting\r\n");
mbed_official 82:0b31dbcd4769 172 return;
mbed_official 82:0b31dbcd4769 173 }
mbed_official 82:0b31dbcd4769 174
mbed_official 82:0b31dbcd4769 175 // 1 stop bits = 0, 2 stop bits = 1
mbed_official 82:0b31dbcd4769 176 if ((stop_bits != 1) && (stop_bits != 2)) {
mbed_official 82:0b31dbcd4769 177 error("Invalid stop bits specified\r\n");
mbed_official 82:0b31dbcd4769 178 }
mbed_official 82:0b31dbcd4769 179 stop_bits -= 1;
mbed_official 82:0b31dbcd4769 180
mbed_official 82:0b31dbcd4769 181 // data bits, parity and parity mode
mbed_official 82:0b31dbcd4769 182 obj->uart->C1 = ((parity_enable << 1)
mbed_official 82:0b31dbcd4769 183 | (parity_select << 0));
mbed_official 82:0b31dbcd4769 184
mbed_official 82:0b31dbcd4769 185 // stop bits
mbed_official 82:0b31dbcd4769 186 obj->uart->BDH &= ~UARTLP_BDH_SBNS_MASK;
mbed_official 82:0b31dbcd4769 187 obj->uart->BDH |= (stop_bits << UARTLP_BDH_SBNS_SHIFT);
mbed_official 82:0b31dbcd4769 188
mbed_official 82:0b31dbcd4769 189 // restore C2 state
mbed_official 82:0b31dbcd4769 190 obj->uart->C2 |= c2_state;
mbed_official 82:0b31dbcd4769 191 }
mbed_official 82:0b31dbcd4769 192
mbed_official 82:0b31dbcd4769 193 /******************************************************************************
mbed_official 82:0b31dbcd4769 194 * INTERRUPTS HANDLING
mbed_official 82:0b31dbcd4769 195 ******************************************************************************/
mbed_official 82:0b31dbcd4769 196 static inline void uart_irq(uint8_t status, uint32_t index) {
mbed_official 82:0b31dbcd4769 197 if (serial_irq_ids[index] != 0) {
mbed_official 82:0b31dbcd4769 198 if (status & UARTLP_S1_TDRE_MASK)
mbed_official 82:0b31dbcd4769 199 irq_handler(serial_irq_ids[index], TxIrq);
mbed_official 82:0b31dbcd4769 200
mbed_official 82:0b31dbcd4769 201 if (status & UARTLP_S1_RDRF_MASK)
mbed_official 82:0b31dbcd4769 202 irq_handler(serial_irq_ids[index], RxIrq);
mbed_official 82:0b31dbcd4769 203 }
mbed_official 82:0b31dbcd4769 204 }
mbed_official 82:0b31dbcd4769 205
mbed_official 82:0b31dbcd4769 206 void uart0_irq() {
mbed_official 82:0b31dbcd4769 207 uart_irq(UART0->S1, 0);
mbed_official 82:0b31dbcd4769 208 if (UART0->S1 & UARTLP_S1_OR_MASK)
mbed_official 82:0b31dbcd4769 209 UART0->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 210 }
mbed_official 82:0b31dbcd4769 211 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 212 void uart1_irq() {uart_irq(UART1->S1, 1);}
mbed_official 82:0b31dbcd4769 213 void uart2_irq() {uart_irq(UART2->S1, 2);}
mbed_official 82:0b31dbcd4769 214 #endif
mbed_official 82:0b31dbcd4769 215
mbed_official 82:0b31dbcd4769 216 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 217 irq_handler = handler;
mbed_official 82:0b31dbcd4769 218 serial_irq_ids[obj->index] = id;
mbed_official 82:0b31dbcd4769 219 }
mbed_official 82:0b31dbcd4769 220
mbed_official 82:0b31dbcd4769 221 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 82:0b31dbcd4769 222 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 82:0b31dbcd4769 223 uint32_t vector = 0;
mbed_official 82:0b31dbcd4769 224 switch ((int)obj->uart) {
mbed_official 82:0b31dbcd4769 225 case UART_0: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 82:0b31dbcd4769 226 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 227 case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 82:0b31dbcd4769 228 case UART_2: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 82:0b31dbcd4769 229 #endif
mbed_official 82:0b31dbcd4769 230 }
mbed_official 82:0b31dbcd4769 231
mbed_official 82:0b31dbcd4769 232 if (enable) {
mbed_official 82:0b31dbcd4769 233 switch (irq) {
mbed_official 82:0b31dbcd4769 234 case RxIrq: obj->uart->C2 |= (UARTLP_C2_RIE_MASK); break;
mbed_official 82:0b31dbcd4769 235 case TxIrq: obj->uart->C2 |= (UARTLP_C2_TIE_MASK); break;
mbed_official 82:0b31dbcd4769 236 }
mbed_official 82:0b31dbcd4769 237 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 238 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 239
mbed_official 82:0b31dbcd4769 240 } else { // disable
mbed_official 82:0b31dbcd4769 241 int all_disabled = 0;
mbed_official 82:0b31dbcd4769 242 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 82:0b31dbcd4769 243 switch (irq) {
mbed_official 82:0b31dbcd4769 244 case RxIrq: obj->uart->C2 &= ~(UARTLP_C2_RIE_MASK); break;
mbed_official 82:0b31dbcd4769 245 case TxIrq: obj->uart->C2 &= ~(UARTLP_C2_TIE_MASK); break;
mbed_official 82:0b31dbcd4769 246 }
mbed_official 82:0b31dbcd4769 247 switch (other_irq) {
mbed_official 82:0b31dbcd4769 248 case RxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_RIE_MASK)) == 0; break;
mbed_official 82:0b31dbcd4769 249 case TxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_TIE_MASK)) == 0; break;
mbed_official 82:0b31dbcd4769 250 }
mbed_official 82:0b31dbcd4769 251 if (all_disabled)
mbed_official 82:0b31dbcd4769 252 NVIC_DisableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 253 }
mbed_official 82:0b31dbcd4769 254 }
mbed_official 82:0b31dbcd4769 255
mbed_official 82:0b31dbcd4769 256 /******************************************************************************
mbed_official 82:0b31dbcd4769 257 * READ/WRITE
mbed_official 82:0b31dbcd4769 258 ******************************************************************************/
mbed_official 82:0b31dbcd4769 259 int serial_getc(serial_t *obj) {
mbed_official 82:0b31dbcd4769 260 while (!serial_readable(obj));
mbed_official 82:0b31dbcd4769 261 return obj->uart->D;
mbed_official 82:0b31dbcd4769 262 }
mbed_official 82:0b31dbcd4769 263
mbed_official 82:0b31dbcd4769 264 void serial_putc(serial_t *obj, int c) {
mbed_official 82:0b31dbcd4769 265 while (!serial_writable(obj));
mbed_official 82:0b31dbcd4769 266 obj->uart->D = c;
mbed_official 82:0b31dbcd4769 267 }
mbed_official 82:0b31dbcd4769 268
mbed_official 82:0b31dbcd4769 269 int serial_readable(serial_t *obj) {
mbed_official 82:0b31dbcd4769 270 // check overrun
mbed_official 82:0b31dbcd4769 271 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 82:0b31dbcd4769 272 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 273 }
mbed_official 82:0b31dbcd4769 274 return (obj->uart->S1 & UARTLP_S1_RDRF_MASK);
mbed_official 82:0b31dbcd4769 275 }
mbed_official 82:0b31dbcd4769 276
mbed_official 82:0b31dbcd4769 277 int serial_writable(serial_t *obj) {
mbed_official 82:0b31dbcd4769 278 // check overrun
mbed_official 82:0b31dbcd4769 279 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 82:0b31dbcd4769 280 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 281 }
mbed_official 82:0b31dbcd4769 282 return (obj->uart->S1 & UARTLP_S1_TDRE_MASK);
mbed_official 82:0b31dbcd4769 283 }
mbed_official 82:0b31dbcd4769 284
mbed_official 82:0b31dbcd4769 285 void serial_clear(serial_t *obj) {
mbed_official 82:0b31dbcd4769 286 }
mbed_official 82:0b31dbcd4769 287
mbed_official 82:0b31dbcd4769 288 void serial_pinout_tx(PinName tx) {
mbed_official 82:0b31dbcd4769 289 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 290 }
mbed_official 82:0b31dbcd4769 291
mbed_official 82:0b31dbcd4769 292 void serial_break_set(serial_t *obj) {
mbed_official 82:0b31dbcd4769 293 obj->uart->C2 |= UARTLP_C2_SBK_MASK;
mbed_official 82:0b31dbcd4769 294 }
mbed_official 82:0b31dbcd4769 295
mbed_official 82:0b31dbcd4769 296 void serial_break_clear(serial_t *obj) {
mbed_official 82:0b31dbcd4769 297 obj->uart->C2 &= ~UARTLP_C2_SBK_MASK;
mbed_official 82:0b31dbcd4769 298 }
mbed_official 82:0b31dbcd4769 299