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.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file pinmap.c
bogdanm 0:9b334a45a8ff 3 *******************************************************************************
bogdanm 0:9b334a45a8ff 4 * @section License
bogdanm 0:9b334a45a8ff 5 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 6 *******************************************************************************
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 9 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 10 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 11 *
bogdanm 0:9b334a45a8ff 12 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 13 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 14 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 15 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 16 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 19 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 20 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 21 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 22 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 23 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 24 *
bogdanm 0:9b334a45a8ff 25 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 26 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 27 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 28 *
bogdanm 0:9b334a45a8ff 29 ******************************************************************************/
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 32 #include "em_gpio.h"
bogdanm 0:9b334a45a8ff 33 #include "em_cmu.h"
bogdanm 0:9b334a45a8ff 34 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 static int gpio_clock_inited = 0;
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 void pin_function(PinName pin, int function)
bogdanm 0:9b334a45a8ff 39 {
bogdanm 0:9b334a45a8ff 40 //Intentionally left empty. We have repurposed the function field.
bogdanm 0:9b334a45a8ff 41 }
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 void pin_mode(PinName pin, PinMode mode)
bogdanm 0:9b334a45a8ff 44 {
bogdanm 0:9b334a45a8ff 45 MBED_ASSERT((0xFFFFFF00 |pin) != NC);
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 /* Enable GPIO clock if not already done */
bogdanm 0:9b334a45a8ff 48 if (!gpio_clock_inited) {
bogdanm 0:9b334a45a8ff 49 CMU_ClockEnable(cmuClock_GPIO, true);
bogdanm 0:9b334a45a8ff 50 gpio_clock_inited = 1;
bogdanm 0:9b334a45a8ff 51 }
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 /* Pin and port index encoded in one uint32.
bogdanm 0:9b334a45a8ff 54 * First four bits represent the pin number
bogdanm 0:9b334a45a8ff 55 * The remaining bits represent the port number */
bogdanm 0:9b334a45a8ff 56 uint32_t pin_number = (uint32_t) pin;
bogdanm 0:9b334a45a8ff 57 int pin_index = (pin_number & 0xF);
bogdanm 0:9b334a45a8ff 58 int port_index = pin_number >> 4;
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 GPIO_PinModeSet(port_index, pin_index, mode & 0xF, GPIO_PinOutGet(port_index, pin_index & 0xF));
bogdanm 0:9b334a45a8ff 61 }
bogdanm 0:9b334a45a8ff 62
bogdanm 0:9b334a45a8ff 63 // TODO_LP get pin_mode to be able to store previous settings