1 | /* mbed Microcontroller Library
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2 | * Copyright (c) 2006-2013 ARM Limited
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 | #include "PeripheralPins.h"
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17 | #include "mbed_error.h"
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18 | #include "gpio_addrdefine.h"
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19 |
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20 | PinName gpio_multi_guard = (PinName)NC; /* If set pin name here, setting of the "pin" is just one time */
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21 |
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22 | void pin_function(PinName pin, int function) {
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23 | if (pin == (PinName)NC) return;
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24 |
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25 | int n = pin >> 4;
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26 | int bitmask = 1<<(pin & 0xf);
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27 | const PinFunc * Pipc_0_func = PIPC_0_tbl;
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28 | int pipc_data = 1;
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29 |
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30 | if (gpio_multi_guard != pin) {
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31 | if (function == 0) {
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32 | // means GPIO mode
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33 | *PMC(n) &= ~bitmask;
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34 | } else {
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35 | // alt-function mode
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36 | --function;
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37 |
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38 | if (function & (1 << 2)) { *PFCAE(n) |= bitmask;}else { *PFCAE(n) &= ~bitmask;}
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39 | if (function & (1 << 1)) { *PFCE(n) |= bitmask;}else { *PFCE(n) &= ~bitmask;}
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40 | if (function & (1 << 0)) { *PFC(n) |= bitmask;}else { *PFC(n) &= ~bitmask;}
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41 |
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42 | while (Pipc_0_func->pin != NC) {
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43 | if ((Pipc_0_func->pin == pin) && ((Pipc_0_func->function - 1) == function)) {
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44 | pipc_data = 0;
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45 | if (Pipc_0_func->pm == 0) {
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46 | *PMSR(n) = (bitmask << 16) | 0;
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47 | } else if (Pipc_0_func->pm == 1) {
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48 | *PMSR(n) = (bitmask << 16) | bitmask;
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49 | } else {
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50 | // Do Nothing
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51 | }
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52 | break;
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53 | }
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54 | Pipc_0_func++;
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55 | }
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56 | if (pipc_data == 1) {
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57 | *PIPC(n) |= bitmask;
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58 | } else {
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59 | *PIPC(n) &= ~bitmask;
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60 | }
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61 |
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62 | if (P1_0 <= pin && pin <= P1_7 && function == 0) {
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63 | *PBDC(n) |= bitmask;
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64 | }
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65 | *PMC(n) |= bitmask;
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66 | }
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67 | } else {
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68 | gpio_multi_guard = (PinName)NC;
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69 | }
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70 | }
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71 |
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72 | void pin_mode(PinName pin, PinMode mode) {
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73 | // if (pin == (PinName)NC) { return; }
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74 | }
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