Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_Freescale/TARGET_K20XX/pinmap.c@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2015 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "mbed_assert.h"
elessair 0:f269e3021894 17 #include "pinmap.h"
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19 void pin_function(PinName pin, int function) {
elessair 0:f269e3021894 20 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 21
elessair 0:f269e3021894 22 uint32_t port_n = (uint32_t)pin >> PORT_SHIFT;
elessair 0:f269e3021894 23 uint32_t pin_n = (uint32_t)(pin & 0x7C) >> 2;
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port_n);
elessair 0:f269e3021894 26 __IO uint32_t* pin_pcr = &(((PORT_Type *)(PORTA_BASE + 0x1000 * port_n)))->PCR[pin_n];
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28 // pin mux bits: [10:8] -> 11100000000 = (0x700)
elessair 0:f269e3021894 29 *pin_pcr = (*pin_pcr & ~0x700) | (function << 8);
elessair 0:f269e3021894 30 }
elessair 0:f269e3021894 31
elessair 0:f269e3021894 32 void pin_mode(PinName pin, PinMode mode) {
elessair 0:f269e3021894 33 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 34 __IO uint32_t* pin_pcr = (__IO uint32_t*)(PORTA_BASE + pin);
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 // pin pullup bits: [1:0] -> 11 = (0x3)
elessair 0:f269e3021894 37 *pin_pcr = (*pin_pcr & ~0x3) | mode;
elessair 0:f269e3021894 38 }