mirror of https://github.com/ARMmbed/mbed-os.git
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "port_api.h"
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#include "pinmap.h"
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#include "gpio_api.h"
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// LPC114 IOCON offset table [port][pin]
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static uint8_t iocon_offset[4][12] = {
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{0x0c,0x10,0x1c,0x2c,0x30,0x34,0x4c,0x50,0x60,0x64,0x68,0x74}, // PORT 0
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{0x78,0x7c,0x80,0x90,0x94,0xa0,0xa4,0xa8,0x14,0x38,0x6c,0x98}, // PORT 1
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{0x08,0x28,0x5c,0x8c,0x40,0x44,0x00,0x20,0x24,0x54,0x58,0x70}, // PORT 2
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{0x84,0x88,0x9c,0xac,0x3c,0x48} // PORT 3
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};
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PinName port_pin(PortName port, int pin) {
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return (PinName)((port << PORT_SHIFT) | (pin << PIN_SHIFT) | (uint32_t)iocon_offset[port][pin]);
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}
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void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
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obj->port = port;
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obj->mask = mask;
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LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (port * 0x10000)));
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obj->reg_data = &port_reg->DATA;
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obj->reg_dir = &port_reg->DIR;
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uint32_t i;
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// The function is set per pin: reuse gpio logic
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for (i=0; i<12; i++) {
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if (obj->mask & (1<<i)) {
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gpio_set(port_pin(obj->port, i));
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}
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}
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port_dir(obj, dir);
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}
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void port_mode(port_t *obj, PinMode mode) {
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uint32_t i;
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// The mode is set per pin: reuse pinmap logic
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for (i=0; i<12; i++) {
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if (obj->mask & (1<<i)) {
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pin_mode(port_pin(obj->port, i), mode);
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}
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}
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}
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void port_dir(port_t *obj, PinDirection dir) {
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switch (dir) {
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case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
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case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
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}
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}
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void port_write(port_t *obj, int value) {
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*obj->reg_data = (value & obj->mask);
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}
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int port_read(port_t *obj) {
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return (*obj->reg_data & obj->mask);
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}
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