Mouse code for the MacroRat
mbed-dev/targets/TARGET_NXP/TARGET_LPC11XX_11CXX/gpio_api.c@18:6a4db94011d3, 2017-05-14 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sun May 14 23:18:57 2017 +0000
- Revision:
- 18:6a4db94011d3
Publishing again
Who changed what in which revision?
User | Revision | Line number | New 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 | #include "reserved_pins.h" |
sahilmgandhi | 18:6a4db94011d3 | 20 | |
sahilmgandhi | 18:6a4db94011d3 | 21 | static const PinName reserved_pins[] = TARGET_RESERVED_PINS; |
sahilmgandhi | 18:6a4db94011d3 | 22 | |
sahilmgandhi | 18:6a4db94011d3 | 23 | uint32_t gpio_set(PinName pin) { |
sahilmgandhi | 18:6a4db94011d3 | 24 | MBED_ASSERT(pin != (PinName)NC); |
sahilmgandhi | 18:6a4db94011d3 | 25 | // PIO default value of following ports are not same as others |
sahilmgandhi | 18:6a4db94011d3 | 26 | unsigned i; |
sahilmgandhi | 18:6a4db94011d3 | 27 | int f = 0; |
sahilmgandhi | 18:6a4db94011d3 | 28 | |
sahilmgandhi | 18:6a4db94011d3 | 29 | for (i = 0; i < sizeof(reserved_pins) / sizeof(PinName); i ++) { |
sahilmgandhi | 18:6a4db94011d3 | 30 | if (pin == reserved_pins[i]) { |
sahilmgandhi | 18:6a4db94011d3 | 31 | f = 1; |
sahilmgandhi | 18:6a4db94011d3 | 32 | break; |
sahilmgandhi | 18:6a4db94011d3 | 33 | } |
sahilmgandhi | 18:6a4db94011d3 | 34 | } |
sahilmgandhi | 18:6a4db94011d3 | 35 | pin_function(pin, f); |
sahilmgandhi | 18:6a4db94011d3 | 36 | return ((pin & 0x0F00) >> 8); |
sahilmgandhi | 18:6a4db94011d3 | 37 | } |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | void gpio_init(gpio_t *obj, PinName pin) { |
sahilmgandhi | 18:6a4db94011d3 | 40 | obj->pin = pin; |
sahilmgandhi | 18:6a4db94011d3 | 41 | if (pin == (PinName)NC) |
sahilmgandhi | 18:6a4db94011d3 | 42 | return; |
sahilmgandhi | 18:6a4db94011d3 | 43 | |
sahilmgandhi | 18:6a4db94011d3 | 44 | LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000))); |
sahilmgandhi | 18:6a4db94011d3 | 45 | |
sahilmgandhi | 18:6a4db94011d3 | 46 | obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)]; |
sahilmgandhi | 18:6a4db94011d3 | 47 | obj->reg_dir = &port_reg->DIR; |
sahilmgandhi | 18:6a4db94011d3 | 48 | obj->reg_write = &port_reg->DATA; |
sahilmgandhi | 18:6a4db94011d3 | 49 | } |
sahilmgandhi | 18:6a4db94011d3 | 50 | |
sahilmgandhi | 18:6a4db94011d3 | 51 | void gpio_mode(gpio_t *obj, PinMode mode) { |
sahilmgandhi | 18:6a4db94011d3 | 52 | pin_mode(obj->pin, mode); |
sahilmgandhi | 18:6a4db94011d3 | 53 | } |
sahilmgandhi | 18:6a4db94011d3 | 54 | |
sahilmgandhi | 18:6a4db94011d3 | 55 | void gpio_dir(gpio_t *obj, PinDirection direction) { |
sahilmgandhi | 18:6a4db94011d3 | 56 | MBED_ASSERT(obj->pin != (PinName)NC); |
sahilmgandhi | 18:6a4db94011d3 | 57 | int pin_number = ((obj->pin & 0x0F00) >> 8); |
sahilmgandhi | 18:6a4db94011d3 | 58 | switch (direction) { |
sahilmgandhi | 18:6a4db94011d3 | 59 | case PIN_INPUT : |
sahilmgandhi | 18:6a4db94011d3 | 60 | *obj->reg_dir &= ~(1 << pin_number); |
sahilmgandhi | 18:6a4db94011d3 | 61 | break; |
sahilmgandhi | 18:6a4db94011d3 | 62 | case PIN_OUTPUT: |
sahilmgandhi | 18:6a4db94011d3 | 63 | *obj->reg_dir |= (1 << pin_number); |
sahilmgandhi | 18:6a4db94011d3 | 64 | break; |
sahilmgandhi | 18:6a4db94011d3 | 65 | } |
sahilmgandhi | 18:6a4db94011d3 | 66 | } |