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targets/TARGET_NXP/TARGET_LPC23XX/port_api.c
- Committer:
- <>
- Date:
- 2016-10-28
- Revision:
- 149:156823d33999
- Parent:
- targets/hal/TARGET_NXP/TARGET_LPC23XX/port_api.c@ 144:ef7eb2e8f9f7
File content as of revision 149:156823d33999:
/* 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" PinName port_pin(PortName port, int pin_n) { return (PinName)(LPC_GPIO0_BASE + ((port << PORT_SHIFT) | pin_n)); } 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 + ((int)port * 0x20)); // Do not use masking, because it prevents the use of the unmasked pins // port_reg->FIOMASK = ~mask; obj->reg_out = &port_reg->FIOPIN; obj->reg_in = &port_reg->FIOPIN; obj->reg_dir = &port_reg->FIODIR; uint32_t i; // The function is set per pin: reuse gpio logic for (i=0; i<32; 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<32; 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_out = (*obj->reg_in & ~obj->mask) | (value & obj->mask); } int port_read(port_t *obj) { return (*obj->reg_in & obj->mask); }