MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_NXP/TARGET_LPC81X/gpio_api.c@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2006-2013 ARM Limited
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16 #include "mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 17 #include "gpio_api.h"
sahilmgandhi 18:6a4db94011d3 18 #include "pinmap.h"
sahilmgandhi 18:6a4db94011d3 19
sahilmgandhi 18:6a4db94011d3 20 static int gpio_enabled = 0;
sahilmgandhi 18:6a4db94011d3 21 static void gpio_enable(void) {
sahilmgandhi 18:6a4db94011d3 22 gpio_enabled = 1;
sahilmgandhi 18:6a4db94011d3 23
sahilmgandhi 18:6a4db94011d3 24 /* Enable AHB clock to the GPIO domain. */
sahilmgandhi 18:6a4db94011d3 25 LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
sahilmgandhi 18:6a4db94011d3 26
sahilmgandhi 18:6a4db94011d3 27 /* Peripheral reset control to GPIO and GPIO INT, a "1" bring it out of reset. */
sahilmgandhi 18:6a4db94011d3 28 LPC_SYSCON->PRESETCTRL &= ~(0x1<<10);
sahilmgandhi 18:6a4db94011d3 29 LPC_SYSCON->PRESETCTRL |= (0x1<<10);
sahilmgandhi 18:6a4db94011d3 30 }
sahilmgandhi 18:6a4db94011d3 31
sahilmgandhi 18:6a4db94011d3 32 uint32_t gpio_set(PinName pin) {
sahilmgandhi 18:6a4db94011d3 33 int f = 0;
sahilmgandhi 18:6a4db94011d3 34
sahilmgandhi 18:6a4db94011d3 35 if (!gpio_enabled)
sahilmgandhi 18:6a4db94011d3 36 gpio_enable();
sahilmgandhi 18:6a4db94011d3 37
sahilmgandhi 18:6a4db94011d3 38 pin_function(pin, f);
sahilmgandhi 18:6a4db94011d3 39
sahilmgandhi 18:6a4db94011d3 40 return (1 << ((int)pin & 0x1F));
sahilmgandhi 18:6a4db94011d3 41 }
sahilmgandhi 18:6a4db94011d3 42
sahilmgandhi 18:6a4db94011d3 43 void gpio_init(gpio_t *obj, PinName pin) {
sahilmgandhi 18:6a4db94011d3 44 obj->pin = pin;
sahilmgandhi 18:6a4db94011d3 45 if (pin == (PinName)NC)
sahilmgandhi 18:6a4db94011d3 46 return;
sahilmgandhi 18:6a4db94011d3 47
sahilmgandhi 18:6a4db94011d3 48 obj->mask = gpio_set(pin);
sahilmgandhi 18:6a4db94011d3 49
sahilmgandhi 18:6a4db94011d3 50 obj->reg_set = &LPC_GPIO_PORT->SET0;
sahilmgandhi 18:6a4db94011d3 51 obj->reg_clr = &LPC_GPIO_PORT->CLR0;
sahilmgandhi 18:6a4db94011d3 52 obj->reg_in = &LPC_GPIO_PORT->PIN0;
sahilmgandhi 18:6a4db94011d3 53 obj->reg_dir = &LPC_GPIO_PORT->DIR0;
sahilmgandhi 18:6a4db94011d3 54 }
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 void gpio_mode(gpio_t *obj, PinMode mode) {
sahilmgandhi 18:6a4db94011d3 57 pin_mode(obj->pin, mode);
sahilmgandhi 18:6a4db94011d3 58 }
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 void gpio_dir(gpio_t *obj, PinDirection direction) {
sahilmgandhi 18:6a4db94011d3 61 MBED_ASSERT(obj->pin != (PinName)NC);
sahilmgandhi 18:6a4db94011d3 62 switch (direction) {
sahilmgandhi 18:6a4db94011d3 63 case PIN_INPUT :
sahilmgandhi 18:6a4db94011d3 64 *obj->reg_dir &= ~obj->mask;
sahilmgandhi 18:6a4db94011d3 65 break;
sahilmgandhi 18:6a4db94011d3 66 case PIN_OUTPUT:
sahilmgandhi 18:6a4db94011d3 67 *obj->reg_dir |= obj->mask;
sahilmgandhi 18:6a4db94011d3 68 break;
sahilmgandhi 18:6a4db94011d3 69 }
sahilmgandhi 18:6a4db94011d3 70 }