Intelligent Systems / mbed-src

This fork of the MBED Library allows you to use counters on the external counter pins (15/16 for Timer 3, 29/30 for Timer 2) by switching internal timing functions in MBED to utilize Timer 0

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_K20D50M/pinmap.c@349:591ef4b19797, 2014-10-23 (annotated)

Committer:
bparrott
Date:
Thu Oct 23 10:10:42 2014 +0000
Revision:
349:591ef4b19797
Parent:
255:20b371a9491b 
This changes the timer used at the core of MBED from Timer 3 to Timer 0. This allows for the use of external pins with both Timer 2 and 3.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 68:41613245dfd7 1 /* mbed Microcontroller Library
mbed_official 68:41613245dfd7 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 68:41613245dfd7 3 *
mbed_official 68:41613245dfd7 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 68:41613245dfd7 5 * you may not use this file except in compliance with the License.
mbed_official 68:41613245dfd7 6 * You may obtain a copy of the License at
mbed_official 68:41613245dfd7 7 *
mbed_official 68:41613245dfd7 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 68:41613245dfd7 9 *
mbed_official 68:41613245dfd7 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 68:41613245dfd7 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 68:41613245dfd7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 68:41613245dfd7 13 * See the License for the specific language governing permissions and
mbed_official 68:41613245dfd7 14 * limitations under the License.
mbed_official 68:41613245dfd7 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
mbed_official 68:41613245dfd7 17 #include "pinmap.h"
mbed_official 68:41613245dfd7 18
mbed_official 68:41613245dfd7 19 void pin_function(PinName pin, int function) {
mbed_official 227:7bd0639b8911 20 MBED_ASSERT(pin != (PinName)NC);
mbed_official 68:41613245dfd7 21
mbed_official 68:41613245dfd7 22 uint32_t port_n = (uint32_t)pin >> PORT_SHIFT;
mbed_official 68:41613245dfd7 23 uint32_t pin_n = (uint32_t)(pin & 0x7C) >> 2;
mbed_official 68:41613245dfd7 24
mbed_official 68:41613245dfd7 25 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port_n);
mbed_official 68:41613245dfd7 26 __IO uint32_t* pin_pcr = &(((PORT_Type *)(PORTA_BASE + 0x1000 * port_n)))->PCR[pin_n];
mbed_official 68:41613245dfd7 27
mbed_official 68:41613245dfd7 28 // pin mux bits: [10:8] -> 11100000000 = (0x700)
mbed_official 68:41613245dfd7 29 *pin_pcr = (*pin_pcr & ~0x700) | (function << 8);
mbed_official 68:41613245dfd7 30 }
mbed_official 68:41613245dfd7 31
mbed_official 68:41613245dfd7 32 void pin_mode(PinName pin, PinMode mode) {
mbed_official 227:7bd0639b8911 33 MBED_ASSERT(pin != (PinName)NC);
mbed_official 68:41613245dfd7 34 __IO uint32_t* pin_pcr = (__IO uint32_t*)(PORTA_BASE + pin);
mbed_official 68:41613245dfd7 35
mbed_official 68:41613245dfd7 36 // pin pullup bits: [1:0] -> 11 = (0x3)
mbed_official 68:41613245dfd7 37 *pin_pcr = (*pin_pcr & ~0x3) | mode;
mbed_official 68:41613245dfd7 38 }