Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Freescale/TARGET_K20XX/gpio_api.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 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2006-2015 ARM Limited
bogdanm 0:9b334a45a8ff 3 *
bogdanm 0:9b334a45a8ff 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 0:9b334a45a8ff 5 * you may not use this file except in compliance with the License.
bogdanm 0:9b334a45a8ff 6 * You may obtain a copy of the License at
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 0:9b334a45a8ff 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 0:9b334a45a8ff 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 0:9b334a45a8ff 13 * See the License for the specific language governing permissions and
bogdanm 0:9b334a45a8ff 14 * limitations under the License.
bogdanm 0:9b334a45a8ff 15 */
bogdanm 0:9b334a45a8ff 16 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 17 #include "gpio_api.h"
bogdanm 0:9b334a45a8ff 18 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 19
bogdanm 0:9b334a45a8ff 20 uint32_t gpio_set(PinName pin) {
bogdanm 0:9b334a45a8ff 21 MBED_ASSERT(pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 22 pin_function(pin, 1);
bogdanm 0:9b334a45a8ff 23 return 1 << ((pin & 0x7F) >> 2);
bogdanm 0:9b334a45a8ff 24 }
bogdanm 0:9b334a45a8ff 25
bogdanm 0:9b334a45a8ff 26 void gpio_init(gpio_t *obj, PinName pin) {
bogdanm 0:9b334a45a8ff 27 obj->pin = pin;
bogdanm 0:9b334a45a8ff 28 if (pin == (PinName)NC)
bogdanm 0:9b334a45a8ff 29 return;
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 obj->mask = gpio_set(pin);
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 unsigned int port = (unsigned int)pin >> PORT_SHIFT;
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 GPIO_Type *reg = (GPIO_Type *)(PTA_BASE + port * 0x40);
bogdanm 0:9b334a45a8ff 36 obj->reg_set = &reg->PSOR;
bogdanm 0:9b334a45a8ff 37 obj->reg_clr = &reg->PCOR;
bogdanm 0:9b334a45a8ff 38 obj->reg_in = &reg->PDIR;
bogdanm 0:9b334a45a8ff 39 obj->reg_dir = &reg->PDDR;
bogdanm 0:9b334a45a8ff 40 }
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 void gpio_mode(gpio_t *obj, PinMode mode) {
bogdanm 0:9b334a45a8ff 43 pin_mode(obj->pin, mode);
bogdanm 0:9b334a45a8ff 44 }
bogdanm 0:9b334a45a8ff 45
bogdanm 0:9b334a45a8ff 46 void gpio_dir(gpio_t *obj, PinDirection direction) {
bogdanm 0:9b334a45a8ff 47 MBED_ASSERT(obj->pin != (PinName)NC);
bogdanm 0:9b334a45a8ff 48 switch (direction) {
bogdanm 0:9b334a45a8ff 49 case PIN_INPUT :
bogdanm 0:9b334a45a8ff 50 *obj->reg_dir &= ~obj->mask;
bogdanm 0:9b334a45a8ff 51 break;
bogdanm 0:9b334a45a8ff 52 case PIN_OUTPUT:
bogdanm 0:9b334a45a8ff 53 *obj->reg_dir |= obj->mask;
bogdanm 0:9b334a45a8ff 54 break;
bogdanm 0:9b334a45a8ff 55 }
bogdanm 0:9b334a45a8ff 56 }