en 129 / mbed-src

[11U68]fix P0_11 to use GPIO

Fork of mbed-src by mbed official

targets/hal/TARGET_NXP/TARGET_LPC2460/serial_api.c@554:edd95c0879f8, 2015-06-01 (annotated)

Committer:
mbed_official
Date:
Mon Jun 01 11:00:11 2015 +0100
Revision:
554:edd95c0879f8
Synchronized with git revision 7a1d25e3dfbe5bc1457774d4af3c73383a0ff81d



Full URL: https://github.com/mbedmicro/mbed/commit/7a1d25e3dfbe5bc1457774d4af3c73383a0ff81d/



Silicon Labs - Initial test framework pin definitions for EFM32 platforms

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 554:edd95c0879f8 1 /* mbed Microcontroller Library
mbed_official 554:edd95c0879f8 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 554:edd95c0879f8 3 *
mbed_official 554:edd95c0879f8 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 554:edd95c0879f8 5 * you may not use this file except in compliance with the License.
mbed_official 554:edd95c0879f8 6 * You may obtain a copy of the License at
mbed_official 554:edd95c0879f8 7 *
mbed_official 554:edd95c0879f8 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 554:edd95c0879f8 9 *
mbed_official 554:edd95c0879f8 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 554:edd95c0879f8 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 554:edd95c0879f8 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 554:edd95c0879f8 13 * See the License for the specific language governing permissions and
mbed_official 554:edd95c0879f8 14 * limitations under the License.
mbed_official 554:edd95c0879f8 15 */
mbed_official 554:edd95c0879f8 16 // math.h required for floating point operations for baud rate calculation
mbed_official 554:edd95c0879f8 17 #include "mbed_assert.h"
mbed_official 554:edd95c0879f8 18 #include <math.h>
mbed_official 554:edd95c0879f8 19 #include <string.h>
mbed_official 554:edd95c0879f8 20 #include <stdlib.h>
mbed_official 554:edd95c0879f8 21
mbed_official 554:edd95c0879f8 22 #include "serial_api.h"
mbed_official 554:edd95c0879f8 23 #include "cmsis.h"
mbed_official 554:edd95c0879f8 24 #include "pinmap.h"
mbed_official 554:edd95c0879f8 25
mbed_official 554:edd95c0879f8 26 /******************************************************************************
mbed_official 554:edd95c0879f8 27 * INITIALIZATION
mbed_official 554:edd95c0879f8 28 ******************************************************************************/
mbed_official 554:edd95c0879f8 29 #define UART_NUM 4
mbed_official 554:edd95c0879f8 30
mbed_official 554:edd95c0879f8 31 static const PinMap PinMap_UART_TX[] = {
mbed_official 554:edd95c0879f8 32 {P0_0, UART_3, 2},
mbed_official 554:edd95c0879f8 33 {P0_2, UART_0, 1},
mbed_official 554:edd95c0879f8 34 {P0_10, UART_2, 1},
mbed_official 554:edd95c0879f8 35 {P0_15, UART_1, 1},
mbed_official 554:edd95c0879f8 36 {P0_25, UART_3, 3},
mbed_official 554:edd95c0879f8 37 {P2_0 , UART_1, 2},
mbed_official 554:edd95c0879f8 38 {P2_8 , UART_2, 2},
mbed_official 554:edd95c0879f8 39 {P4_28, UART_3, 3},
mbed_official 554:edd95c0879f8 40 {NC , NC , 0}
mbed_official 554:edd95c0879f8 41 };
mbed_official 554:edd95c0879f8 42
mbed_official 554:edd95c0879f8 43 static const PinMap PinMap_UART_RX[] = {
mbed_official 554:edd95c0879f8 44 {P0_1 , UART_3, 2},
mbed_official 554:edd95c0879f8 45 {P0_3 , UART_0, 1},
mbed_official 554:edd95c0879f8 46 {P0_11, UART_2, 1},
mbed_official 554:edd95c0879f8 47 {P0_16, UART_1, 1},
mbed_official 554:edd95c0879f8 48 {P0_26, UART_3, 3},
mbed_official 554:edd95c0879f8 49 {P2_1 , UART_1, 2},
mbed_official 554:edd95c0879f8 50 {P2_9 , UART_2, 2},
mbed_official 554:edd95c0879f8 51 {P4_29, UART_3, 3},
mbed_official 554:edd95c0879f8 52 {NC , NC , 0}
mbed_official 554:edd95c0879f8 53 };
mbed_official 554:edd95c0879f8 54
mbed_official 554:edd95c0879f8 55 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 554:edd95c0879f8 56 static uart_irq_handler irq_handler;
mbed_official 554:edd95c0879f8 57
mbed_official 554:edd95c0879f8 58 int stdio_uart_inited = 0;
mbed_official 554:edd95c0879f8 59 serial_t stdio_uart;
mbed_official 554:edd95c0879f8 60
mbed_official 554:edd95c0879f8 61 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 554:edd95c0879f8 62 int is_stdio_uart = 0;
mbed_official 554:edd95c0879f8 63
mbed_official 554:edd95c0879f8 64 // determine the UART to use
mbed_official 554:edd95c0879f8 65 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 554:edd95c0879f8 66 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 554:edd95c0879f8 67 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 554:edd95c0879f8 68 MBED_ASSERT((int)uart != NC);
mbed_official 554:edd95c0879f8 69
mbed_official 554:edd95c0879f8 70 obj->uart = (LPC_UART_TypeDef *)uart;
mbed_official 554:edd95c0879f8 71 // enable power
mbed_official 554:edd95c0879f8 72 switch (uart) {
mbed_official 554:edd95c0879f8 73 case UART_0: LPC_SC->PCONP |= 1 << 3; break;
mbed_official 554:edd95c0879f8 74 case UART_1: LPC_SC->PCONP |= 1 << 4; break;
mbed_official 554:edd95c0879f8 75 case UART_2: LPC_SC->PCONP |= 1 << 24; break;
mbed_official 554:edd95c0879f8 76 case UART_3: LPC_SC->PCONP |= 1 << 25; break;
mbed_official 554:edd95c0879f8 77 }
mbed_official 554:edd95c0879f8 78
mbed_official 554:edd95c0879f8 79 // enable fifos and default rx trigger level
mbed_official 554:edd95c0879f8 80 obj->uart->FCR = 1 << 0 // FIFO Enable - 0 = Disables, 1 = Enabled
mbed_official 554:edd95c0879f8 81 | 0 << 1 // Rx Fifo Reset
mbed_official 554:edd95c0879f8 82 | 0 << 2 // Tx Fifo Reset
mbed_official 554:edd95c0879f8 83 | 0 << 6; // Rx irq trigger level - 0 = 1 char, 1 = 4 chars, 2 = 8 chars, 3 = 14 chars
mbed_official 554:edd95c0879f8 84
mbed_official 554:edd95c0879f8 85 // disable irqs
mbed_official 554:edd95c0879f8 86 obj->uart->IER = 0 << 0 // Rx Data available irq enable
mbed_official 554:edd95c0879f8 87 | 0 << 1 // Tx Fifo empty irq enable
mbed_official 554:edd95c0879f8 88 | 0 << 2; // Rx Line Status irq enable
mbed_official 554:edd95c0879f8 89
mbed_official 554:edd95c0879f8 90 // set default baud rate and format
mbed_official 554:edd95c0879f8 91 serial_baud (obj, 9600);
mbed_official 554:edd95c0879f8 92 serial_format(obj, 8, ParityNone, 1);
mbed_official 554:edd95c0879f8 93
mbed_official 554:edd95c0879f8 94 // pinout the chosen uart
mbed_official 554:edd95c0879f8 95 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 554:edd95c0879f8 96 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 554:edd95c0879f8 97
mbed_official 554:edd95c0879f8 98 // set rx/tx pins in PullUp mode
mbed_official 554:edd95c0879f8 99 if (tx != NC) {
mbed_official 554:edd95c0879f8 100 pin_mode(tx, PullUp);
mbed_official 554:edd95c0879f8 101 }
mbed_official 554:edd95c0879f8 102 if (rx != NC) {
mbed_official 554:edd95c0879f8 103 pin_mode(rx, PullUp);
mbed_official 554:edd95c0879f8 104 }
mbed_official 554:edd95c0879f8 105
mbed_official 554:edd95c0879f8 106 switch (uart) {
mbed_official 554:edd95c0879f8 107 case UART_0: obj->index = 0; break;
mbed_official 554:edd95c0879f8 108 case UART_1: obj->index = 1; break;
mbed_official 554:edd95c0879f8 109 case UART_2: obj->index = 2; break;
mbed_official 554:edd95c0879f8 110 case UART_3: obj->index = 3; break;
mbed_official 554:edd95c0879f8 111 }
mbed_official 554:edd95c0879f8 112
mbed_official 554:edd95c0879f8 113 is_stdio_uart = (uart == STDIO_UART) ? (1) : (0);
mbed_official 554:edd95c0879f8 114
mbed_official 554:edd95c0879f8 115 if (is_stdio_uart) {
mbed_official 554:edd95c0879f8 116 stdio_uart_inited = 1;
mbed_official 554:edd95c0879f8 117 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 554:edd95c0879f8 118 }
mbed_official 554:edd95c0879f8 119 }
mbed_official 554:edd95c0879f8 120
mbed_official 554:edd95c0879f8 121 void serial_free(serial_t *obj) {
mbed_official 554:edd95c0879f8 122 serial_irq_ids[obj->index] = 0;
mbed_official 554:edd95c0879f8 123 }
mbed_official 554:edd95c0879f8 124
mbed_official 554:edd95c0879f8 125 // serial_baud
mbed_official 554:edd95c0879f8 126 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 554:edd95c0879f8 127 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 554:edd95c0879f8 128 MBED_ASSERT((int)obj->uart <= UART_3);
mbed_official 554:edd95c0879f8 129 // The LPC2300 and LPC1700 have a divider and a fractional divider to control the
mbed_official 554:edd95c0879f8 130 // baud rate. The formula is:
mbed_official 554:edd95c0879f8 131 //
mbed_official 554:edd95c0879f8 132 // Baudrate = (1 / PCLK) * 16 * DL * (1 + DivAddVal / MulVal)
mbed_official 554:edd95c0879f8 133 // where:
mbed_official 554:edd95c0879f8 134 // 1 < MulVal <= 15
mbed_official 554:edd95c0879f8 135 // 0 <= DivAddVal < 14
mbed_official 554:edd95c0879f8 136 // DivAddVal < MulVal
mbed_official 554:edd95c0879f8 137 //
mbed_official 554:edd95c0879f8 138 // set pclk to /1
mbed_official 554:edd95c0879f8 139 switch ((int)obj->uart) {
mbed_official 554:edd95c0879f8 140 case UART_0: LPC_SC->PCLKSEL0 &= ~(0x3 << 6); LPC_SC->PCLKSEL0 |= (0x1 << 6); break;
mbed_official 554:edd95c0879f8 141 case UART_1: LPC_SC->PCLKSEL0 &= ~(0x3 << 8); LPC_SC->PCLKSEL0 |= (0x1 << 8); break;
mbed_official 554:edd95c0879f8 142 case UART_2: LPC_SC->PCLKSEL1 &= ~(0x3 << 16); LPC_SC->PCLKSEL1 |= (0x1 << 16); break;
mbed_official 554:edd95c0879f8 143 case UART_3: LPC_SC->PCLKSEL1 &= ~(0x3 << 18); LPC_SC->PCLKSEL1 |= (0x1 << 18); break;
mbed_official 554:edd95c0879f8 144 default: break;
mbed_official 554:edd95c0879f8 145 }
mbed_official 554:edd95c0879f8 146
mbed_official 554:edd95c0879f8 147 uint32_t PCLK = SystemCoreClock;
mbed_official 554:edd95c0879f8 148
mbed_official 554:edd95c0879f8 149 // First we check to see if the basic divide with no DivAddVal/MulVal
mbed_official 554:edd95c0879f8 150 // ratio gives us an integer result. If it does, we set DivAddVal = 0,
mbed_official 554:edd95c0879f8 151 // MulVal = 1. Otherwise, we search the valid ratio value range to find
mbed_official 554:edd95c0879f8 152 // the closest match. This could be more elegant, using search methods
mbed_official 554:edd95c0879f8 153 // and/or lookup tables, but the brute force method is not that much
mbed_official 554:edd95c0879f8 154 // slower, and is more maintainable.
mbed_official 554:edd95c0879f8 155 uint16_t DL = PCLK / (16 * baudrate);
mbed_official 554:edd95c0879f8 156
mbed_official 554:edd95c0879f8 157 uint8_t DivAddVal = 0;
mbed_official 554:edd95c0879f8 158 uint8_t MulVal = 1;
mbed_official 554:edd95c0879f8 159 int hit = 0;
mbed_official 554:edd95c0879f8 160 uint16_t dlv;
mbed_official 554:edd95c0879f8 161 uint8_t mv, dav;
mbed_official 554:edd95c0879f8 162 if ((PCLK % (16 * baudrate)) != 0) { // Checking for zero remainder
mbed_official 554:edd95c0879f8 163 int err_best = baudrate, b;
mbed_official 554:edd95c0879f8 164 for (mv = 1; mv < 16 && !hit; mv++)
mbed_official 554:edd95c0879f8 165 {
mbed_official 554:edd95c0879f8 166 for (dav = 0; dav < mv; dav++)
mbed_official 554:edd95c0879f8 167 {
mbed_official 554:edd95c0879f8 168 // baudrate = PCLK / (16 * dlv * (1 + (DivAdd / Mul))
mbed_official 554:edd95c0879f8 169 // solving for dlv, we get dlv = mul * PCLK / (16 * baudrate * (divadd + mul))
mbed_official 554:edd95c0879f8 170 // mul has 4 bits, PCLK has 27 so we have 1 bit headroom which can be used for rounding
mbed_official 554:edd95c0879f8 171 // for many values of mul and PCLK we have 2 or more bits of headroom which can be used to improve precision
mbed_official 554:edd95c0879f8 172 // note: X / 32 doesn't round correctly. Instead, we use ((X / 16) + 1) / 2 for correct rounding
mbed_official 554:edd95c0879f8 173
mbed_official 554:edd95c0879f8 174 if ((mv * PCLK * 2) & 0x80000000) // 1 bit headroom
mbed_official 554:edd95c0879f8 175 dlv = ((((2 * mv * PCLK) / (baudrate * (dav + mv))) / 16) + 1) / 2;
mbed_official 554:edd95c0879f8 176 else // 2 bits headroom, use more precision
mbed_official 554:edd95c0879f8 177 dlv = ((((4 * mv * PCLK) / (baudrate * (dav + mv))) / 32) + 1) / 2;
mbed_official 554:edd95c0879f8 178
mbed_official 554:edd95c0879f8 179 // datasheet says if DLL==DLM==0, then 1 is used instead since divide by zero is ungood
mbed_official 554:edd95c0879f8 180 if (dlv == 0)
mbed_official 554:edd95c0879f8 181 dlv = 1;
mbed_official 554:edd95c0879f8 182
mbed_official 554:edd95c0879f8 183 // datasheet says if dav > 0 then DL must be >= 2
mbed_official 554:edd95c0879f8 184 if ((dav > 0) && (dlv < 2))
mbed_official 554:edd95c0879f8 185 dlv = 2;
mbed_official 554:edd95c0879f8 186
mbed_official 554:edd95c0879f8 187 // integer rearrangement of the baudrate equation (with rounding)
mbed_official 554:edd95c0879f8 188 b = ((PCLK * mv / (dlv * (dav + mv) * 8)) + 1) / 2;
mbed_official 554:edd95c0879f8 189
mbed_official 554:edd95c0879f8 190 // check to see how we went
mbed_official 554:edd95c0879f8 191 b = abs(b - baudrate);
mbed_official 554:edd95c0879f8 192 if (b < err_best)
mbed_official 554:edd95c0879f8 193 {
mbed_official 554:edd95c0879f8 194 err_best = b;
mbed_official 554:edd95c0879f8 195
mbed_official 554:edd95c0879f8 196 DL = dlv;
mbed_official 554:edd95c0879f8 197 MulVal = mv;
mbed_official 554:edd95c0879f8 198 DivAddVal = dav;
mbed_official 554:edd95c0879f8 199
mbed_official 554:edd95c0879f8 200 if (b == baudrate)
mbed_official 554:edd95c0879f8 201 {
mbed_official 554:edd95c0879f8 202 hit = 1;
mbed_official 554:edd95c0879f8 203 break;
mbed_official 554:edd95c0879f8 204 }
mbed_official 554:edd95c0879f8 205 }
mbed_official 554:edd95c0879f8 206 }
mbed_official 554:edd95c0879f8 207 }
mbed_official 554:edd95c0879f8 208 }
mbed_official 554:edd95c0879f8 209
mbed_official 554:edd95c0879f8 210 // set LCR[DLAB] to enable writing to divider registers
mbed_official 554:edd95c0879f8 211 obj->uart->LCR |= (1 << 7);
mbed_official 554:edd95c0879f8 212
mbed_official 554:edd95c0879f8 213 // set divider values
mbed_official 554:edd95c0879f8 214 obj->uart->DLM = (DL >> 8) & 0xFF;
mbed_official 554:edd95c0879f8 215 obj->uart->DLL = (DL >> 0) & 0xFF;
mbed_official 554:edd95c0879f8 216 obj->uart->FDR = (uint32_t) DivAddVal << 0
mbed_official 554:edd95c0879f8 217 | (uint32_t) MulVal << 4;
mbed_official 554:edd95c0879f8 218
mbed_official 554:edd95c0879f8 219 // clear LCR[DLAB]
mbed_official 554:edd95c0879f8 220 obj->uart->LCR &= ~(1 << 7);
mbed_official 554:edd95c0879f8 221 }
mbed_official 554:edd95c0879f8 222
mbed_official 554:edd95c0879f8 223 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 554:edd95c0879f8 224 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits
mbed_official 554:edd95c0879f8 225 MBED_ASSERT((data_bits > 4) && (data_bits < 9)); // 0: 5 data bits ... 3: 8 data bits
mbed_official 554:edd95c0879f8 226 MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven) ||
mbed_official 554:edd95c0879f8 227 (parity == ParityForced1) || (parity == ParityForced0));
mbed_official 554:edd95c0879f8 228
mbed_official 554:edd95c0879f8 229 stop_bits -= 1;
mbed_official 554:edd95c0879f8 230 data_bits -= 5;
mbed_official 554:edd95c0879f8 231
mbed_official 554:edd95c0879f8 232 int parity_enable = 0, parity_select = 0;
mbed_official 554:edd95c0879f8 233 switch (parity) {
mbed_official 554:edd95c0879f8 234 case ParityNone: parity_enable = 0; parity_select = 0; break;
mbed_official 554:edd95c0879f8 235 case ParityOdd : parity_enable = 1; parity_select = 0; break;
mbed_official 554:edd95c0879f8 236 case ParityEven: parity_enable = 1; parity_select = 1; break;
mbed_official 554:edd95c0879f8 237 case ParityForced1: parity_enable = 1; parity_select = 2; break;
mbed_official 554:edd95c0879f8 238 case ParityForced0: parity_enable = 1; parity_select = 3; break;
mbed_official 554:edd95c0879f8 239 default:
mbed_official 554:edd95c0879f8 240 break;
mbed_official 554:edd95c0879f8 241 }
mbed_official 554:edd95c0879f8 242
mbed_official 554:edd95c0879f8 243 obj->uart->LCR = data_bits << 0
mbed_official 554:edd95c0879f8 244 | stop_bits << 2
mbed_official 554:edd95c0879f8 245 | parity_enable << 3
mbed_official 554:edd95c0879f8 246 | parity_select << 4;
mbed_official 554:edd95c0879f8 247 }
mbed_official 554:edd95c0879f8 248
mbed_official 554:edd95c0879f8 249 /******************************************************************************
mbed_official 554:edd95c0879f8 250 * INTERRUPTS HANDLING
mbed_official 554:edd95c0879f8 251 ******************************************************************************/
mbed_official 554:edd95c0879f8 252 static inline void uart_irq(uint32_t iir, uint32_t index) {
mbed_official 554:edd95c0879f8 253 // [Chapter 14] LPC17xx UART0/2/3: UARTn Interrupt Handling
mbed_official 554:edd95c0879f8 254 SerialIrq irq_type;
mbed_official 554:edd95c0879f8 255 switch (iir) {
mbed_official 554:edd95c0879f8 256 case 1: irq_type = TxIrq; break;
mbed_official 554:edd95c0879f8 257 case 2: irq_type = RxIrq; break;
mbed_official 554:edd95c0879f8 258 default: return;
mbed_official 554:edd95c0879f8 259 }
mbed_official 554:edd95c0879f8 260
mbed_official 554:edd95c0879f8 261 if (serial_irq_ids[index] != 0){
mbed_official 554:edd95c0879f8 262 irq_handler(serial_irq_ids[index], irq_type);
mbed_official 554:edd95c0879f8 263 }
mbed_official 554:edd95c0879f8 264 }
mbed_official 554:edd95c0879f8 265
mbed_official 554:edd95c0879f8 266 void uart0_irq() {uart_irq((LPC_UART0->IIR >> 1) & 0x7, 0);}
mbed_official 554:edd95c0879f8 267 void uart1_irq() {uart_irq((LPC_UART1->IIR >> 1) & 0x7, 1);}
mbed_official 554:edd95c0879f8 268 void uart2_irq() {uart_irq((LPC_UART2->IIR >> 1) & 0x7, 2);}
mbed_official 554:edd95c0879f8 269 void uart3_irq() {uart_irq((LPC_UART3->IIR >> 1) & 0x7, 3);}
mbed_official 554:edd95c0879f8 270
mbed_official 554:edd95c0879f8 271 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 554:edd95c0879f8 272 irq_handler = handler;
mbed_official 554:edd95c0879f8 273 serial_irq_ids[obj->index] = id;
mbed_official 554:edd95c0879f8 274 }
mbed_official 554:edd95c0879f8 275
mbed_official 554:edd95c0879f8 276 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 554:edd95c0879f8 277 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 554:edd95c0879f8 278 uint32_t vector = 0;
mbed_official 554:edd95c0879f8 279 switch ((int)obj->uart) {
mbed_official 554:edd95c0879f8 280 case UART_0: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 554:edd95c0879f8 281 case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 554:edd95c0879f8 282 case UART_2: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 554:edd95c0879f8 283 case UART_3: irq_n=UART3_IRQn; vector = (uint32_t)&uart3_irq; break;
mbed_official 554:edd95c0879f8 284 }
mbed_official 554:edd95c0879f8 285
mbed_official 554:edd95c0879f8 286 if (enable) {
mbed_official 554:edd95c0879f8 287 obj->uart->IER |= 1 << irq;
mbed_official 554:edd95c0879f8 288 NVIC_SetVector(irq_n, vector);
mbed_official 554:edd95c0879f8 289 NVIC_EnableIRQ(irq_n);
mbed_official 554:edd95c0879f8 290 } else { // disable
mbed_official 554:edd95c0879f8 291 int all_disabled = 0;
mbed_official 554:edd95c0879f8 292 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 554:edd95c0879f8 293 obj->uart->IER &= ~(1 << irq);
mbed_official 554:edd95c0879f8 294 all_disabled = (obj->uart->IER & (1 << other_irq)) == 0;
mbed_official 554:edd95c0879f8 295 if (all_disabled)
mbed_official 554:edd95c0879f8 296 NVIC_DisableIRQ(irq_n);
mbed_official 554:edd95c0879f8 297 }
mbed_official 554:edd95c0879f8 298 }
mbed_official 554:edd95c0879f8 299
mbed_official 554:edd95c0879f8 300 /******************************************************************************
mbed_official 554:edd95c0879f8 301 * READ/WRITE
mbed_official 554:edd95c0879f8 302 ******************************************************************************/
mbed_official 554:edd95c0879f8 303 int serial_getc(serial_t *obj) {
mbed_official 554:edd95c0879f8 304 while (!serial_readable(obj));
mbed_official 554:edd95c0879f8 305 return obj->uart->RBR;
mbed_official 554:edd95c0879f8 306 }
mbed_official 554:edd95c0879f8 307
mbed_official 554:edd95c0879f8 308 void serial_putc(serial_t *obj, int c) {
mbed_official 554:edd95c0879f8 309 while (!serial_writable(obj));
mbed_official 554:edd95c0879f8 310 obj->uart->THR = c;
mbed_official 554:edd95c0879f8 311 }
mbed_official 554:edd95c0879f8 312
mbed_official 554:edd95c0879f8 313 int serial_readable(serial_t *obj) {
mbed_official 554:edd95c0879f8 314 return obj->uart->LSR & 0x01;
mbed_official 554:edd95c0879f8 315 }
mbed_official 554:edd95c0879f8 316
mbed_official 554:edd95c0879f8 317 int serial_writable(serial_t *obj) {
mbed_official 554:edd95c0879f8 318 return obj->uart->LSR & 0x20;
mbed_official 554:edd95c0879f8 319 }
mbed_official 554:edd95c0879f8 320
mbed_official 554:edd95c0879f8 321 void serial_clear(serial_t *obj) {
mbed_official 554:edd95c0879f8 322 obj->uart->FCR = 1 << 1 // rx FIFO reset
mbed_official 554:edd95c0879f8 323 | 1 << 2 // tx FIFO reset
mbed_official 554:edd95c0879f8 324 | 0 << 6; // interrupt depth
mbed_official 554:edd95c0879f8 325 }
mbed_official 554:edd95c0879f8 326
mbed_official 554:edd95c0879f8 327 void serial_pinout_tx(PinName tx) {
mbed_official 554:edd95c0879f8 328 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 554:edd95c0879f8 329 }
mbed_official 554:edd95c0879f8 330
mbed_official 554:edd95c0879f8 331 void serial_break_set(serial_t *obj) {
mbed_official 554:edd95c0879f8 332 obj->uart->LCR |= (1 << 6);
mbed_official 554:edd95c0879f8 333 }
mbed_official 554:edd95c0879f8 334
mbed_official 554:edd95c0879f8 335 void serial_break_clear(serial_t *obj) {
mbed_official 554:edd95c0879f8 336 obj->uart->LCR &= ~(1 << 6);
mbed_official 554:edd95c0879f8 337 }
mbed_official 554:edd95c0879f8 338