added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

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.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.h"
<> 144:ef7eb2e8f9f7 25 #include "em_gpio.h"
<> 144:ef7eb2e8f9f7 26 #include "em_cmu.h"
<> 144:ef7eb2e8f9f7 27 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29 static int gpio_clock_inited = 0;
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 void pin_function(PinName pin, int function)
<> 144:ef7eb2e8f9f7 32 {
<> 144:ef7eb2e8f9f7 33 //Intentionally left empty. We have repurposed the function field.
<> 144:ef7eb2e8f9f7 34 }
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 void pin_mode(PinName pin, PinMode mode)
<> 144:ef7eb2e8f9f7 37 {
<> 144:ef7eb2e8f9f7 38 MBED_ASSERT((0xFFFFFF00 |pin) != NC);
<> 144:ef7eb2e8f9f7 39
<> 144:ef7eb2e8f9f7 40 /* Enable GPIO clock if not already done */
<> 144:ef7eb2e8f9f7 41 if (!gpio_clock_inited) {
<> 144:ef7eb2e8f9f7 42 CMU_ClockEnable(cmuClock_GPIO, true);
<> 144:ef7eb2e8f9f7 43 gpio_clock_inited = 1;
<> 144:ef7eb2e8f9f7 44 }
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 /* Pin and port index encoded in one uint32.
<> 144:ef7eb2e8f9f7 47 * First four bits represent the pin number
<> 144:ef7eb2e8f9f7 48 * The remaining bits represent the port number */
<> 144:ef7eb2e8f9f7 49 uint32_t pin_number = (uint32_t) pin;
<> 144:ef7eb2e8f9f7 50 int pin_index = (pin_number & 0xF);
<> 144:ef7eb2e8f9f7 51 int port_index = pin_number >> 4;
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 GPIO_PinModeSet(port_index, pin_index, mode & 0xF, GPIO_PinOutGet(port_index, pin_index & 0xF));
<> 144:ef7eb2e8f9f7 54 }
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 // TODO_LP get pin_mode to be able to store previous settings