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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?
User | Revision | Line number | New contents of line |
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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 | } |