mirror of https://github.com/ARMmbed/mbed-os.git
141 lines
5.1 KiB
C
141 lines
5.1 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2015 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 "gpio_api.h"
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#include "pinmap.h"
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// function to enable the GPIO pin
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uint32_t gpio_set(PinName pin) {
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return (1);
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}
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//function to initialise the gpio pin
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// this links the board control bits for each pin
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// with the object created for the pin
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void gpio_init(gpio_t *obj, PinName pin) {
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if(pin == NC){ return;}
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else {
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int pin_value = 0;
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obj->pin = pin;
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if(pin <=15){
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pin_value = pin;
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}else if (pin >= 16 && pin <= 31){
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pin_value = pin-16;
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}else if (pin >= 32 && pin <= 47){
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pin_value = pin-32;
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}else if (pin >= 48 && pin <= 51){
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pin_value = pin-48;
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}else if (pin == 100 || pin == 101){
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pin_value = pin-100;
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}else if (pin == 110 || pin == 111){
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pin_value = pin-110;
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}else if (pin >= 200 && pin <= 207){
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pin_value = pin-200;
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}else if (pin >= 210 && pin <= 217){
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pin_value = pin-210;
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}else if (pin == 303){
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pin_value = pin-302;
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}else if (pin == 307){
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pin_value = pin-307;
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}else if (pin == 308){
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pin_value = pin-305;
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}else if (pin == 309){
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pin_value = pin-305;
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}else if (pin == 310){
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pin_value = pin-305;
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}else if (pin == 311){
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pin_value = pin-305;
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}else if (pin == 323){
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pin_value = pin-315;
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}else if (pin == 334){
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pin_value = pin-325;
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}else if (pin == 653){
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pin_value = pin-646;
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}
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obj->mask = 0x1 << pin_value;
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obj->pin_number = pin;
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if(pin <=15) {
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obj->reg_data = &CMSDK_GPIO0->DATAOUT ;
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obj->reg_in = &CMSDK_GPIO0->DATA ;
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obj->reg_dir = &CMSDK_GPIO0->OUTENABLESET ;
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obj->reg_dirclr = &CMSDK_GPIO0->OUTENABLECLR ;
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} else if (pin >= 16 && pin <= 31){
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obj->reg_data = &CMSDK_GPIO1->DATAOUT ;
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obj->reg_in = &CMSDK_GPIO1->DATA ;
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obj->reg_dir = &CMSDK_GPIO1->OUTENABLESET ;
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obj->reg_dirclr = &CMSDK_GPIO1->OUTENABLECLR ;
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} else if (pin >= 32 && pin <= 47){
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obj->reg_data = &CMSDK_GPIO2->DATAOUT;
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obj->reg_in = &CMSDK_GPIO2->DATA;
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obj->reg_dir = &CMSDK_GPIO2->OUTENABLESET ;
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obj->reg_dirclr = &CMSDK_GPIO2->OUTENABLECLR ;
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} else if (pin >= 48 && pin <= 51){
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obj->reg_data = &CMSDK_GPIO3->DATAOUT;
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obj->reg_in = &CMSDK_GPIO3->DATA;
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obj->reg_dir = &CMSDK_GPIO3->OUTENABLESET ;
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obj->reg_dirclr = &CMSDK_GPIO3->OUTENABLECLR ;
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} else if (pin == 100 || pin == 101){
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obj->reg_data = &MPS2_FPGAIO->LED; //user leds
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obj->reg_in = &MPS2_FPGAIO->LED;
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} else if (pin == 110 || pin == 111){
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obj->reg_data = &MPS2_FPGAIO->BUTTON; //user switches
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obj->reg_in = &MPS2_FPGAIO->BUTTON; //user switches
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}else if (pin >= 200 && pin <= 207){
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obj->reg_data = &MPS2_SCC->LEDS; //mcc leds
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obj->reg_in = &MPS2_SCC->LEDS; //mcc leds
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}else if (pin >= 210 && pin <= 217){
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obj->reg_in = &MPS2_SCC->SWITCHES; //mcc switches
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}else if (pin == 303 || pin == 307){
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obj->reg_data = &MPS2_FPGAIO->MISC; //spi chip select = 303, clcd chip select = 307
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}else if (pin == 308 || pin == 309 || pin == 310 || pin == 311){
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obj->reg_data = &MPS2_FPGAIO->MISC; //clcd control bits
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}else if (pin == 323 || pin == 334 || pin == 653){ //spi 3 chip select = 323, spi 4 chip select = 334, adc chip select = 653
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obj->reg_data = &MPS2_FPGAIO->MISC; //spi cs bits
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}
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if (pin == 323){
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CMSDK_GPIO0->ALTFUNCSET |= 0x1000;
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}else if (pin == 334){
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CMSDK_GPIO2->ALTFUNCSET |= 0x0040;
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}else if (pin == 653){
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CMSDK_GPIO1->ALTFUNCSET |= 0x0001;
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}
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}
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}
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void gpio_mode(gpio_t *obj, PinMode mode) {
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pin_mode(obj->pin, mode);
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}
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void gpio_dir(gpio_t *obj, PinDirection direction) {
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if(obj->pin >= 0 && obj->pin <= 51)
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{
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switch (direction) {
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case PIN_INPUT : *obj->reg_dirclr = obj->mask; break;
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case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
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}
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} else {return;}
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}
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int gpio_is_connected(const gpio_t *obj){
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if(obj->pin != (PinName)NC){
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return 1;
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} else {
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return 0;
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}
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}
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