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