Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/pinmap_function.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 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 2 * @file pinmap_function.c
<> 144:ef7eb2e8f9f7 3 *******************************************************************************
<> 144:ef7eb2e8f9f7 4 * @section License
<> 144:ef7eb2e8f9f7 5 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
<> 144:ef7eb2e8f9f7 6 *******************************************************************************
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * SPDX-License-Identifier: Apache-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
<> 144:ef7eb2e8f9f7 11 * not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 12 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 15 *
<> 144:ef7eb2e8f9f7 16 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
<> 144:ef7eb2e8f9f7 18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 19 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 20 * limitations under the License.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 ******************************************************************************/
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 #include "pinmap_function.h"
<> 144:ef7eb2e8f9f7 25 #include "PinNames.h"
<> 144:ef7eb2e8f9f7 26 #include "error.h"
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 /**
<> 144:ef7eb2e8f9f7 29 * Get the value of the function field for a pin in a pinmap
<> 144:ef7eb2e8f9f7 30 * @param pin A pin
<> 144:ef7eb2e8f9f7 31 * @param map A pinmap for a given peripheral
<> 144:ef7eb2e8f9f7 32 * @return Content of function field in pinmap for the given pin
<> 144:ef7eb2e8f9f7 33 */
<> 144:ef7eb2e8f9f7 34 uint32_t pinmap_get_function_field(PinName pin, const PinMap *map)
<> 144:ef7eb2e8f9f7 35 {
<> 144:ef7eb2e8f9f7 36 while (map->pin != NC) {
<> 144:ef7eb2e8f9f7 37 if (map->pin == pin) {
<> 144:ef7eb2e8f9f7 38 return map->function;
<> 144:ef7eb2e8f9f7 39 }
<> 144:ef7eb2e8f9f7 40 map++;
<> 144:ef7eb2e8f9f7 41 }
<> 144:ef7eb2e8f9f7 42 return (uint32_t) NC;
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 /**
<> 144:ef7eb2e8f9f7 46 * Get the location a given peripheral is routed to from pin
<> 144:ef7eb2e8f9f7 47 * This is stored in the function field of the pinmap
<> 144:ef7eb2e8f9f7 48 * @param pin The pin
<> 144:ef7eb2e8f9f7 49 * @param map Pinmap for the given peripheral
<> 144:ef7eb2e8f9f7 50 * @return uint32 describing location (0, 1, 2, ...)
<> 144:ef7eb2e8f9f7 51 */
<> 144:ef7eb2e8f9f7 52 uint32_t pin_location(PinName pin, const PinMap *map)
<> 144:ef7eb2e8f9f7 53 {
<> 144:ef7eb2e8f9f7 54 if (pin == (PinName) NC) {
<> 144:ef7eb2e8f9f7 55 return (uint32_t) NC;
<> 144:ef7eb2e8f9f7 56 }
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 uint32_t location = pinmap_get_function_field(pin, map);
<> 144:ef7eb2e8f9f7 59 if ((uint32_t) NC == location) { // no mapping available
<> 144:ef7eb2e8f9f7 60 error("location not found for pin");
<> 144:ef7eb2e8f9f7 61 }
<> 144:ef7eb2e8f9f7 62 return location;
<> 144:ef7eb2e8f9f7 63 }