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git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC176X/port_api.c
1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 PinName
port_pin(PortName port
, int pin_n
) {
21 return (PinName
)(LPC_GPIO0_BASE
+ ((port
<< PORT_SHIFT
) | pin_n
));
24 void port_init(port_t
*obj
, PortName port
, int mask
, PinDirection dir
) {
28 LPC_GPIO_TypeDef
*port_reg
= (LPC_GPIO_TypeDef
*)(LPC_GPIO0_BASE
+ ((int)port
* 0x20));
30 // Do not use masking, because it prevents the use of the unmasked pins
31 // port_reg->FIOMASK = ~mask;
33 obj
->reg_out
= &port_reg
->FIOPIN
;
34 obj
->reg_in
= &port_reg
->FIOPIN
;
35 obj
->reg_dir
= &port_reg
->FIODIR
;
38 // The function is set per pin: reuse gpio logic
39 for (i
=0; i
<32; i
++) {
40 if (obj
->mask
& (1<<i
)) {
41 gpio_set(port_pin(obj
->port
, i
));
48 void port_mode(port_t
*obj
, PinMode mode
) {
50 // The mode is set per pin: reuse pinmap logic
51 for (i
=0; i
<32; i
++) {
52 if (obj
->mask
& (1<<i
)) {
53 pin_mode(port_pin(obj
->port
, i
), mode
);
58 void port_dir(port_t
*obj
, PinDirection dir
) {
60 case PIN_INPUT
: *obj
->reg_dir
&= ~obj
->mask
; break;
61 case PIN_OUTPUT
: *obj
->reg_dir
|= obj
->mask
; break;
65 void port_write(port_t
*obj
, int value
) {
66 *obj
->reg_out
= (*obj
->reg_in
& ~obj
->mask
) | (value
& obj
->mask
);
69 int port_read(port_t
*obj
) {
70 return (*obj
->reg_in
& obj
->mask
);