Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/mbed_pinmap_common.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 17 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 void pinmap_pinout(PinName pin, const PinMap *map) {
<> 144:ef7eb2e8f9f7 20 if (pin == NC)
<> 144:ef7eb2e8f9f7 21 return;
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 while (map->pin != NC) {
<> 144:ef7eb2e8f9f7 24 if (map->pin == pin) {
<> 144:ef7eb2e8f9f7 25 pin_function(pin, map->function);
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 pin_mode(pin, PullNone);
<> 144:ef7eb2e8f9f7 28 return;
<> 144:ef7eb2e8f9f7 29 }
<> 144:ef7eb2e8f9f7 30 map++;
<> 144:ef7eb2e8f9f7 31 }
<> 144:ef7eb2e8f9f7 32 error("could not pinout");
<> 144:ef7eb2e8f9f7 33 }
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 uint32_t pinmap_merge(uint32_t a, uint32_t b) {
<> 144:ef7eb2e8f9f7 36 // both are the same (inc both NC)
<> 144:ef7eb2e8f9f7 37 if (a == b)
<> 144:ef7eb2e8f9f7 38 return a;
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 // one (or both) is not connected
<> 144:ef7eb2e8f9f7 41 if (a == (uint32_t)NC)
<> 144:ef7eb2e8f9f7 42 return b;
<> 144:ef7eb2e8f9f7 43 if (b == (uint32_t)NC)
<> 144:ef7eb2e8f9f7 44 return a;
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 // mis-match error case
<> 144:ef7eb2e8f9f7 47 error("pinmap mis-match");
<> 144:ef7eb2e8f9f7 48 return (uint32_t)NC;
<> 144:ef7eb2e8f9f7 49 }
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 uint32_t pinmap_find_peripheral(PinName pin, const PinMap* map) {
<> 144:ef7eb2e8f9f7 52 while (map->pin != NC) {
<> 144:ef7eb2e8f9f7 53 if (map->pin == pin)
<> 144:ef7eb2e8f9f7 54 return map->peripheral;
<> 144:ef7eb2e8f9f7 55 map++;
<> 144:ef7eb2e8f9f7 56 }
<> 144:ef7eb2e8f9f7 57 return (uint32_t)NC;
<> 144:ef7eb2e8f9f7 58 }
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 uint32_t pinmap_peripheral(PinName pin, const PinMap* map) {
<> 144:ef7eb2e8f9f7 61 uint32_t peripheral = (uint32_t)NC;
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 if (pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 64 return (uint32_t)NC;
<> 144:ef7eb2e8f9f7 65 peripheral = pinmap_find_peripheral(pin, map);
<> 144:ef7eb2e8f9f7 66 if ((uint32_t)NC == peripheral) // no mapping available
<> 144:ef7eb2e8f9f7 67 error("pinmap not found for peripheral");
<> 144:ef7eb2e8f9f7 68 return peripheral;
<> 144:ef7eb2e8f9f7 69 }
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
<> 144:ef7eb2e8f9f7 72 while (map->pin != NC) {
<> 144:ef7eb2e8f9f7 73 if (map->pin == pin)
<> 144:ef7eb2e8f9f7 74 return map->function;
<> 144:ef7eb2e8f9f7 75 map++;
<> 144:ef7eb2e8f9f7 76 }
<> 144:ef7eb2e8f9f7 77 return (uint32_t)NC;
<> 144:ef7eb2e8f9f7 78 }
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 uint32_t pinmap_function(PinName pin, const PinMap* map) {
<> 144:ef7eb2e8f9f7 81 uint32_t function = (uint32_t)NC;
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 if (pin == (PinName)NC)
<> 144:ef7eb2e8f9f7 84 return (uint32_t)NC;
<> 144:ef7eb2e8f9f7 85 function = pinmap_find_function(pin, map);
<> 144:ef7eb2e8f9f7 86 if ((uint32_t)NC == function) // no mapping available
<> 144:ef7eb2e8f9f7 87 error("pinmap not found for function");
<> 144:ef7eb2e8f9f7 88 return function;
<> 144:ef7eb2e8f9f7 89 }