mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/pinmap_function.c@18:da299f395b9e, 2015-11-09 (annotated)

Committer:
mbed_official
Date:
Mon Nov 09 13:30:11 2015 +0000
Revision:
18:da299f395b9e
Parent:
15:a81a8d6c1dfe
Child:
64:41a834223ea3
Synchronized with git revision f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3



Full URL: https://github.com/mbedmicro/mbed/commit/f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3/



Added support for SAML21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /* mbed Microcontroller Library
mbed_official 15:a81a8d6c1dfe 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 15:a81a8d6c1dfe 5 * you may not use this file except in compliance with the License.
mbed_official 15:a81a8d6c1dfe 6 * You may obtain a copy of the License at
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 15:a81a8d6c1dfe 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 15:a81a8d6c1dfe 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 15:a81a8d6c1dfe 13 * See the License for the specific language governing permissions and
mbed_official 15:a81a8d6c1dfe 14 * limitations under the License.
mbed_official 15:a81a8d6c1dfe 15 */
mbed_official 15:a81a8d6c1dfe 16 #include <stddef.h>
mbed_official 15:a81a8d6c1dfe 17
mbed_official 15:a81a8d6c1dfe 18 #include "cmsis.h"
mbed_official 15:a81a8d6c1dfe 19 #include "mbed_assert.h"
mbed_official 15:a81a8d6c1dfe 20 #include "compiler.h"
mbed_official 15:a81a8d6c1dfe 21
mbed_official 15:a81a8d6c1dfe 22 #include "pinmap_function.h"
mbed_official 15:a81a8d6c1dfe 23
mbed_official 15:a81a8d6c1dfe 24 extern struct pwm_pin_channel pwn_pins[];
mbed_official 15:a81a8d6c1dfe 25
mbed_official 15:a81a8d6c1dfe 26 static uint32_t pinmap_merge_pins(uint32_t a, uint32_t b)
mbed_official 15:a81a8d6c1dfe 27 {
mbed_official 15:a81a8d6c1dfe 28 /* both are the same (inc both NC) */
mbed_official 15:a81a8d6c1dfe 29 if (a == b)
mbed_official 15:a81a8d6c1dfe 30 return a;
mbed_official 15:a81a8d6c1dfe 31
mbed_official 15:a81a8d6c1dfe 32 /* one (or both) is not connected */
mbed_official 15:a81a8d6c1dfe 33 if (a == (uint32_t)NC)
mbed_official 15:a81a8d6c1dfe 34 return b;
mbed_official 15:a81a8d6c1dfe 35 if (b == (uint32_t)NC)
mbed_official 15:a81a8d6c1dfe 36 return a;
mbed_official 15:a81a8d6c1dfe 37
mbed_official 15:a81a8d6c1dfe 38 return (uint32_t)NC;
mbed_official 15:a81a8d6c1dfe 39 }
mbed_official 15:a81a8d6c1dfe 40
mbed_official 15:a81a8d6c1dfe 41 /** Find the SERCOM peripheral of given pin
mbed_official 15:a81a8d6c1dfe 42 *
mbed_official 15:a81a8d6c1dfe 43 * Find and return the SERCOM peripheral of input pin, either from default pads, or from extended pads
mbed_official 15:a81a8d6c1dfe 44 * @param[in] pin1 First pin
mbed_official 15:a81a8d6c1dfe 45 * @param[in] pad_select to select which pad is to be used first to find
mbed_official 15:a81a8d6c1dfe 46 * @return SERCOM peripheral if found, else, NC
mbed_official 15:a81a8d6c1dfe 47 */
mbed_official 15:a81a8d6c1dfe 48 uint32_t pinmap_find_peripheral_from_pad(PinName pin, enum sercom_pad_selection pad_select)
mbed_official 15:a81a8d6c1dfe 49 {
mbed_official 15:a81a8d6c1dfe 50 uint32_t pin_sercom = NC;
mbed_official 15:a81a8d6c1dfe 51
mbed_official 15:a81a8d6c1dfe 52 if (pin == NC) return NC;
mbed_official 15:a81a8d6c1dfe 53
mbed_official 15:a81a8d6c1dfe 54 if (pad_select == SERCOM_USE_EXTENDED_PAD) {
mbed_official 15:a81a8d6c1dfe 55 pin_sercom = pinmap_find_peripheral(pin, PinMap_SERCOM_PADEx);
mbed_official 15:a81a8d6c1dfe 56 }
mbed_official 15:a81a8d6c1dfe 57 if (pin_sercom == (uint32_t)NC) {
mbed_official 15:a81a8d6c1dfe 58 pin_sercom = pinmap_find_peripheral(pin, PinMap_SERCOM_PAD);
mbed_official 15:a81a8d6c1dfe 59 }
mbed_official 15:a81a8d6c1dfe 60
mbed_official 15:a81a8d6c1dfe 61 return pin_sercom;
mbed_official 15:a81a8d6c1dfe 62 }
mbed_official 15:a81a8d6c1dfe 63
mbed_official 15:a81a8d6c1dfe 64 /** Find the common SERCOM shared by two pins
mbed_official 15:a81a8d6c1dfe 65 *
mbed_official 15:a81a8d6c1dfe 66 * Finds the common SERCOM index of two input pins.
mbed_official 15:a81a8d6c1dfe 67 * Currently uses default pad only
mbed_official 15:a81a8d6c1dfe 68 * @param[in] pin1 First pin
mbed_official 15:a81a8d6c1dfe 69 * @param[in] pin2 Second pin
mbed_official 15:a81a8d6c1dfe 70 * @return SERCOM index if found, else, NC
mbed_official 15:a81a8d6c1dfe 71 */
mbed_official 15:a81a8d6c1dfe 72 uint32_t pinmap_merge_sercom(PinName pin1, PinName pin2)
mbed_official 15:a81a8d6c1dfe 73 {
mbed_official 15:a81a8d6c1dfe 74 uint32_t pin1_sercom, pin2_sercom;
mbed_official 15:a81a8d6c1dfe 75
mbed_official 15:a81a8d6c1dfe 76 /* Using default pads for now */
mbed_official 15:a81a8d6c1dfe 77 pin1_sercom = pinmap_find_peripheral_from_pad(pin1, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 78 if (pin1_sercom != (uint32_t)NC) {
mbed_official 15:a81a8d6c1dfe 79 pin1_sercom &= 0x0F;
mbed_official 15:a81a8d6c1dfe 80 }
mbed_official 15:a81a8d6c1dfe 81 pin2_sercom = pinmap_find_peripheral_from_pad(pin2, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 82 if (pin2_sercom != (uint32_t)NC) {
mbed_official 15:a81a8d6c1dfe 83 pin2_sercom &= 0x0F;
mbed_official 15:a81a8d6c1dfe 84 }
mbed_official 15:a81a8d6c1dfe 85
mbed_official 15:a81a8d6c1dfe 86 return pinmap_merge_pins(pin1_sercom, pin2_sercom);
mbed_official 15:a81a8d6c1dfe 87 }
mbed_official 15:a81a8d6c1dfe 88
mbed_official 15:a81a8d6c1dfe 89 /** Find the common SERCOM shared by four pins
mbed_official 15:a81a8d6c1dfe 90 *
mbed_official 15:a81a8d6c1dfe 91 * Finds the common SERCOM index shared by four input pins.
mbed_official 15:a81a8d6c1dfe 92 * @param[in] pin1 First pin
mbed_official 15:a81a8d6c1dfe 93 * @param[in] pin2 Second pin
mbed_official 15:a81a8d6c1dfe 94 * @param[in] pin3 Third pin
mbed_official 15:a81a8d6c1dfe 95 * @param[in] pin4 Fourth pin
mbed_official 15:a81a8d6c1dfe 96 * @return SERCOM index if found, else, NC
mbed_official 15:a81a8d6c1dfe 97 */
mbed_official 15:a81a8d6c1dfe 98 uint32_t pinmap_find_sercom(PinName pin1, PinName pin2, PinName pin3, PinName pin4)
mbed_official 15:a81a8d6c1dfe 99 {
mbed_official 15:a81a8d6c1dfe 100 int i;
mbed_official 15:a81a8d6c1dfe 101 uint32_t sercom_index[4];
mbed_official 15:a81a8d6c1dfe 102 uint32_t pin_com = NC;
mbed_official 15:a81a8d6c1dfe 103
mbed_official 15:a81a8d6c1dfe 104 sercom_index[0] = pinmap_find_peripheral_from_pad(pin1, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 105 sercom_index[1] = pinmap_find_peripheral_from_pad(pin2, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 106 sercom_index[2] = pinmap_find_peripheral_from_pad(pin3, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 107 sercom_index[3] = pinmap_find_peripheral_from_pad(pin4, SERCOM_USE_DEFAULT_PAD);
mbed_official 15:a81a8d6c1dfe 108
mbed_official 15:a81a8d6c1dfe 109 /* Find common SERCOM, if there are conflicts, return NC */
mbed_official 15:a81a8d6c1dfe 110 for (i=0; i<4; i++) {
mbed_official 15:a81a8d6c1dfe 111 if (sercom_index[i] != (uint32_t)NC) {
mbed_official 15:a81a8d6c1dfe 112 if (pin_com == (uint32_t)NC) {
mbed_official 15:a81a8d6c1dfe 113 pin_com = sercom_index[i] & 0x0F;
mbed_official 15:a81a8d6c1dfe 114 } else if (pin_com != (sercom_index[i] & 0x0F)) {
mbed_official 15:a81a8d6c1dfe 115 return NC;
mbed_official 15:a81a8d6c1dfe 116 }
mbed_official 15:a81a8d6c1dfe 117 }
mbed_official 15:a81a8d6c1dfe 118 }
mbed_official 15:a81a8d6c1dfe 119
mbed_official 15:a81a8d6c1dfe 120 return pin_com;
mbed_official 15:a81a8d6c1dfe 121 }
mbed_official 15:a81a8d6c1dfe 122
mbed_official 15:a81a8d6c1dfe 123 /** Find the MUX function of input pin specific to given SERCOM index
mbed_official 15:a81a8d6c1dfe 124 *
mbed_official 15:a81a8d6c1dfe 125 * @param[in] pin Pin whose function is to be found out
mbed_official 15:a81a8d6c1dfe 126 * @param[in] sercom_index SERCOM index
mbed_official 15:a81a8d6c1dfe 127 * @return MUX function if found, else, NC
mbed_official 15:a81a8d6c1dfe 128 */
mbed_official 15:a81a8d6c1dfe 129 uint32_t pinmap_function_sercom(PinName pin, uint32_t sercom_index)
mbed_official 15:a81a8d6c1dfe 130 {
mbed_official 15:a81a8d6c1dfe 131 uint32_t func = NC;
mbed_official 15:a81a8d6c1dfe 132 uint32_t index;
mbed_official 15:a81a8d6c1dfe 133 sercom_index &= 0x0F;
mbed_official 15:a81a8d6c1dfe 134
mbed_official 15:a81a8d6c1dfe 135 if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
mbed_official 15:a81a8d6c1dfe 136 return NC;
mbed_official 15:a81a8d6c1dfe 137 }
mbed_official 15:a81a8d6c1dfe 138 index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
mbed_official 15:a81a8d6c1dfe 139 if ((index & 0x0F) == sercom_index) {
mbed_official 15:a81a8d6c1dfe 140 func = pinmap_function(pin, PinMap_SERCOM_PAD);
mbed_official 15:a81a8d6c1dfe 141 return func;
mbed_official 15:a81a8d6c1dfe 142 }
mbed_official 15:a81a8d6c1dfe 143 index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
mbed_official 15:a81a8d6c1dfe 144 if ((index & 0x0F) == sercom_index) {
mbed_official 15:a81a8d6c1dfe 145 func = pinmap_function(pin, PinMap_SERCOM_PADEx);
mbed_official 15:a81a8d6c1dfe 146 return func;
mbed_official 15:a81a8d6c1dfe 147 }
mbed_official 15:a81a8d6c1dfe 148 return NC;
mbed_official 15:a81a8d6c1dfe 149 }
mbed_official 15:a81a8d6c1dfe 150
mbed_official 15:a81a8d6c1dfe 151 /** Find the MUX pad of input pin specific to given SERCOM index
mbed_official 15:a81a8d6c1dfe 152 *
mbed_official 15:a81a8d6c1dfe 153 * @param[in] pin Pin whose function is to be found out
mbed_official 15:a81a8d6c1dfe 154 * @param[in] sercom_index SERCOM index
mbed_official 15:a81a8d6c1dfe 155 * @return MUX pad if found, else, NC
mbed_official 15:a81a8d6c1dfe 156 */
mbed_official 15:a81a8d6c1dfe 157 uint32_t pinmap_pad_sercom(PinName pin, uint32_t sercom_index)
mbed_official 15:a81a8d6c1dfe 158 {
mbed_official 15:a81a8d6c1dfe 159 uint32_t index;
mbed_official 15:a81a8d6c1dfe 160 sercom_index &= 0x0F;
mbed_official 15:a81a8d6c1dfe 161
mbed_official 15:a81a8d6c1dfe 162 if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
mbed_official 15:a81a8d6c1dfe 163 return NC;
mbed_official 15:a81a8d6c1dfe 164 }
mbed_official 15:a81a8d6c1dfe 165 index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
mbed_official 15:a81a8d6c1dfe 166 if ((index & 0x0F) == sercom_index) {
mbed_official 15:a81a8d6c1dfe 167 return ((index >> 4) & 0x0F);
mbed_official 15:a81a8d6c1dfe 168 }
mbed_official 15:a81a8d6c1dfe 169 index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
mbed_official 15:a81a8d6c1dfe 170 if ((index & 0x0F) == sercom_index) {
mbed_official 15:a81a8d6c1dfe 171 return ((index >> 4) & 0x0F);
mbed_official 15:a81a8d6c1dfe 172 }
mbed_official 15:a81a8d6c1dfe 173 return NC;
mbed_official 15:a81a8d6c1dfe 174 }
mbed_official 15:a81a8d6c1dfe 175
mbed_official 15:a81a8d6c1dfe 176 /** Find the MUX function of input pin specific to given SERCOM index
mbed_official 15:a81a8d6c1dfe 177 *
mbed_official 15:a81a8d6c1dfe 178 * @param[in] pin unused
mbed_official 15:a81a8d6c1dfe 179 * @param[in] sercom_index SERCOM index
mbed_official 15:a81a8d6c1dfe 180 * @return base address to SERCOM if found, else NC
mbed_official 15:a81a8d6c1dfe 181 */
mbed_official 15:a81a8d6c1dfe 182 uint32_t pinmap_peripheral_sercom(PinName pin, uint32_t sercom_index)
mbed_official 15:a81a8d6c1dfe 183 {
mbed_official 15:a81a8d6c1dfe 184 uint32_t sercom_address[6] = {
mbed_official 18:da299f395b9e 185 #if (SAMD21) || (SAMR21)
mbed_official 15:a81a8d6c1dfe 186 0x42000800UL, // Base address of SERCOM0
mbed_official 15:a81a8d6c1dfe 187 0x42000C00UL, // Base address of SERCOM1
mbed_official 15:a81a8d6c1dfe 188 0x42001000UL, // Base address of SERCOM2
mbed_official 15:a81a8d6c1dfe 189 0x42001400UL, // Base address of SERCOM3
mbed_official 15:a81a8d6c1dfe 190 0x42001800UL, // Base address of SERCOM4
mbed_official 15:a81a8d6c1dfe 191 0x42001C00UL // Base address of SERCOM5
mbed_official 18:da299f395b9e 192 #elif (SAML21)
mbed_official 18:da299f395b9e 193 0x42000000UL, // Base address of SERCOM0
mbed_official 18:da299f395b9e 194 0x42000400UL, // Base address of SERCOM1
mbed_official 18:da299f395b9e 195 0x42000800UL, // Base address of SERCOM2
mbed_official 18:da299f395b9e 196 0x42000C00UL, // Base address of SERCOM3
mbed_official 18:da299f395b9e 197 0x42001000UL, // Base address of SERCOM4
mbed_official 18:da299f395b9e 198 0x43000400UL // Base address of SERCOM5
mbed_official 18:da299f395b9e 199 #endif
mbed_official 15:a81a8d6c1dfe 200 };
mbed_official 15:a81a8d6c1dfe 201 uint32_t index = sercom_index & 0x0F;
mbed_official 15:a81a8d6c1dfe 202
mbed_official 15:a81a8d6c1dfe 203 if (index >= SERCOM_INST_NUM) {
mbed_official 15:a81a8d6c1dfe 204 return NC;
mbed_official 15:a81a8d6c1dfe 205 }
mbed_official 15:a81a8d6c1dfe 206 return sercom_address[(sercom_index&0x0F)];
mbed_official 15:a81a8d6c1dfe 207 }
mbed_official 15:a81a8d6c1dfe 208
mbed_official 15:a81a8d6c1dfe 209 /** Find the channel index of a pin specific to a PWM instance
mbed_official 15:a81a8d6c1dfe 210 *
mbed_official 15:a81a8d6c1dfe 211 * @param[in] pin pin name
mbed_official 15:a81a8d6c1dfe 212 * @param[in] pwm pwm peripheral (unused now)
mbed_official 15:a81a8d6c1dfe 213 * @return Channel index of the specified pin
mbed_official 15:a81a8d6c1dfe 214 */
mbed_official 15:a81a8d6c1dfe 215 uint32_t pinmap_channel_pwm(PinName pin, PWMName pwm)
mbed_official 15:a81a8d6c1dfe 216 {
mbed_official 15:a81a8d6c1dfe 217 struct pwm_pin_channel *pwm_ch = pwn_pins;
mbed_official 15:a81a8d6c1dfe 218
mbed_official 15:a81a8d6c1dfe 219 while (pwm_ch->pin != NC) {
mbed_official 15:a81a8d6c1dfe 220 if (pin == pwm_ch->pin) {
mbed_official 15:a81a8d6c1dfe 221 return (uint32_t)pwm_ch->channel_index;
mbed_official 15:a81a8d6c1dfe 222 }
mbed_official 15:a81a8d6c1dfe 223 pwm_ch++;
mbed_official 15:a81a8d6c1dfe 224 }
mbed_official 15:a81a8d6c1dfe 225 return NC;
mbed_official 15:a81a8d6c1dfe 226 }