Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_ARM_SSG/TARGET_MPS2/gpio_api.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2015 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 17 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 // function to enable the GPIO pin
<> 144:ef7eb2e8f9f7 20 uint32_t gpio_set(PinName pin) {
<> 144:ef7eb2e8f9f7 21 return (1);
<> 144:ef7eb2e8f9f7 22 }
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 //function to initialise the gpio pin
<> 144:ef7eb2e8f9f7 25 // this links the board control bits for each pin
<> 144:ef7eb2e8f9f7 26 // with the object created for the pin
<> 144:ef7eb2e8f9f7 27 void gpio_init(gpio_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 28 if(pin == NC){ return;}
<> 144:ef7eb2e8f9f7 29 else {
<> 144:ef7eb2e8f9f7 30 int pin_value = 0;
<> 144:ef7eb2e8f9f7 31 obj->pin = pin;
<> 144:ef7eb2e8f9f7 32 if(pin <=15){
<> 144:ef7eb2e8f9f7 33 pin_value = pin;
<> 144:ef7eb2e8f9f7 34 }else if (pin >= 16 && pin <= 31){
<> 144:ef7eb2e8f9f7 35 pin_value = pin-16;
<> 144:ef7eb2e8f9f7 36 }else if (pin >= 32 && pin <= 47){
<> 144:ef7eb2e8f9f7 37 pin_value = pin-32;
<> 144:ef7eb2e8f9f7 38 }else if (pin >= 48 && pin <= 51){
<> 144:ef7eb2e8f9f7 39 pin_value = pin-48;
<> 144:ef7eb2e8f9f7 40 }else if (pin == 100 || pin == 101){
<> 144:ef7eb2e8f9f7 41 pin_value = pin-100;
<> 144:ef7eb2e8f9f7 42 }else if (pin == 110 || pin == 111){
<> 144:ef7eb2e8f9f7 43 pin_value = pin-110;
<> 144:ef7eb2e8f9f7 44 }else if (pin >= 200 && pin <= 207){
<> 144:ef7eb2e8f9f7 45 pin_value = pin-200;
<> 144:ef7eb2e8f9f7 46 }else if (pin >= 210 && pin <= 217){
<> 144:ef7eb2e8f9f7 47 pin_value = pin-210;
<> 144:ef7eb2e8f9f7 48 }else if (pin == 303){
<> 144:ef7eb2e8f9f7 49 pin_value = pin-302;
<> 144:ef7eb2e8f9f7 50 }else if (pin == 307){
<> 144:ef7eb2e8f9f7 51 pin_value = pin-307;
<> 144:ef7eb2e8f9f7 52 }else if (pin == 308){
<> 144:ef7eb2e8f9f7 53 pin_value = pin-305;
<> 144:ef7eb2e8f9f7 54 }else if (pin == 309){
<> 144:ef7eb2e8f9f7 55 pin_value = pin-305;
<> 144:ef7eb2e8f9f7 56 }else if (pin == 310){
<> 144:ef7eb2e8f9f7 57 pin_value = pin-305;
<> 144:ef7eb2e8f9f7 58 }else if (pin == 311){
<> 144:ef7eb2e8f9f7 59 pin_value = pin-305;
<> 144:ef7eb2e8f9f7 60 }else if (pin == 323){
<> 144:ef7eb2e8f9f7 61 pin_value = pin-315;
<> 144:ef7eb2e8f9f7 62 }else if (pin == 334){
<> 144:ef7eb2e8f9f7 63 pin_value = pin-325;
<> 144:ef7eb2e8f9f7 64 }else if (pin == 653){
<> 144:ef7eb2e8f9f7 65 pin_value = pin-646;
<> 144:ef7eb2e8f9f7 66 }
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 obj->mask = 0x1 << pin_value;
<> 144:ef7eb2e8f9f7 69 obj->pin_number = pin;
<> 144:ef7eb2e8f9f7 70 if(pin <=15) {
<> 144:ef7eb2e8f9f7 71 obj->reg_data = &CMSDK_GPIO0->DATAOUT ;
<> 144:ef7eb2e8f9f7 72 obj->reg_in = &CMSDK_GPIO0->DATA ;
<> 144:ef7eb2e8f9f7 73 obj->reg_dir = &CMSDK_GPIO0->OUTENABLESET ;
<> 144:ef7eb2e8f9f7 74 obj->reg_dirclr = &CMSDK_GPIO0->OUTENABLECLR ;
<> 144:ef7eb2e8f9f7 75 } else if (pin >= 16 && pin <= 31){
<> 144:ef7eb2e8f9f7 76 obj->reg_data = &CMSDK_GPIO1->DATAOUT ;
<> 144:ef7eb2e8f9f7 77 obj->reg_in = &CMSDK_GPIO1->DATA ;
<> 144:ef7eb2e8f9f7 78 obj->reg_dir = &CMSDK_GPIO1->OUTENABLESET ;
<> 144:ef7eb2e8f9f7 79 obj->reg_dirclr = &CMSDK_GPIO1->OUTENABLECLR ;
<> 144:ef7eb2e8f9f7 80 } else if (pin >= 32 && pin <= 47){
<> 144:ef7eb2e8f9f7 81 obj->reg_data = &CMSDK_GPIO2->DATAOUT;
<> 144:ef7eb2e8f9f7 82 obj->reg_in = &CMSDK_GPIO2->DATA;
<> 144:ef7eb2e8f9f7 83 obj->reg_dir = &CMSDK_GPIO2->OUTENABLESET ;
<> 144:ef7eb2e8f9f7 84 obj->reg_dirclr = &CMSDK_GPIO2->OUTENABLECLR ;
<> 144:ef7eb2e8f9f7 85 } else if (pin >= 48 && pin <= 51){
<> 144:ef7eb2e8f9f7 86 obj->reg_data = &CMSDK_GPIO3->DATAOUT;
<> 144:ef7eb2e8f9f7 87 obj->reg_in = &CMSDK_GPIO3->DATA;
<> 144:ef7eb2e8f9f7 88 obj->reg_dir = &CMSDK_GPIO3->OUTENABLESET ;
<> 144:ef7eb2e8f9f7 89 obj->reg_dirclr = &CMSDK_GPIO3->OUTENABLECLR ;
<> 144:ef7eb2e8f9f7 90 } else if (pin == 100 || pin == 101){
<> 144:ef7eb2e8f9f7 91 obj->reg_data = &MPS2_FPGAIO->LED; //user leds
<> 144:ef7eb2e8f9f7 92 obj->reg_in = &MPS2_FPGAIO->LED;
<> 144:ef7eb2e8f9f7 93 } else if (pin == 110 || pin == 111){
<> 144:ef7eb2e8f9f7 94 obj->reg_data = &MPS2_FPGAIO->BUTTON; //user switches
<> 144:ef7eb2e8f9f7 95 obj->reg_in = &MPS2_FPGAIO->BUTTON; //user switches
<> 144:ef7eb2e8f9f7 96 }else if (pin >= 200 && pin <= 207){
<> 144:ef7eb2e8f9f7 97 obj->reg_data = &MPS2_SCC->LEDS; //mcc leds
<> 144:ef7eb2e8f9f7 98 obj->reg_in = &MPS2_SCC->LEDS; //mcc leds
<> 144:ef7eb2e8f9f7 99 }else if (pin >= 210 && pin <= 217){
<> 144:ef7eb2e8f9f7 100 obj->reg_in = &MPS2_SCC->SWITCHES; //mcc switches
<> 144:ef7eb2e8f9f7 101 }else if (pin == 303 || pin == 307){
<> 144:ef7eb2e8f9f7 102 obj->reg_data = &MPS2_FPGAIO->MISC; //spi chip select = 303, clcd chip select = 307
<> 144:ef7eb2e8f9f7 103 }else if (pin == 308 || pin == 309 || pin == 310 || pin == 311){
<> 144:ef7eb2e8f9f7 104 obj->reg_data = &MPS2_FPGAIO->MISC; //clcd control bits
<> 144:ef7eb2e8f9f7 105 }else if (pin == 323 || pin == 334 || pin == 653){ //spi 3 chip select = 323, spi 4 chip select = 334, adc chip select = 653
<> 144:ef7eb2e8f9f7 106 obj->reg_data = &MPS2_FPGAIO->MISC; //spi cs bits
<> 144:ef7eb2e8f9f7 107 }
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 if (pin == 323){
<> 144:ef7eb2e8f9f7 110 CMSDK_GPIO0->ALTFUNCSET |= 0x1000;
<> 144:ef7eb2e8f9f7 111 }else if (pin == 334){
<> 144:ef7eb2e8f9f7 112 CMSDK_GPIO2->ALTFUNCSET |= 0x0040;
<> 144:ef7eb2e8f9f7 113 }else if (pin == 653){
<> 144:ef7eb2e8f9f7 114 CMSDK_GPIO1->ALTFUNCSET |= 0x0001;
<> 144:ef7eb2e8f9f7 115 }
<> 144:ef7eb2e8f9f7 116 }
<> 144:ef7eb2e8f9f7 117 }
<> 144:ef7eb2e8f9f7 118
<> 144:ef7eb2e8f9f7 119 void gpio_mode(gpio_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 120 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 121 }
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 void gpio_dir(gpio_t *obj, PinDirection direction) {
<> 144:ef7eb2e8f9f7 124 if(obj->pin >= 0 && obj->pin <= 51)
<> 144:ef7eb2e8f9f7 125 {
<> 144:ef7eb2e8f9f7 126 switch (direction) {
<> 144:ef7eb2e8f9f7 127 case PIN_INPUT : *obj->reg_dirclr = obj->mask; break;
<> 144:ef7eb2e8f9f7 128 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
<> 144:ef7eb2e8f9f7 129 }
<> 144:ef7eb2e8f9f7 130 } else {return;}
<> 144:ef7eb2e8f9f7 131 }
<> 144:ef7eb2e8f9f7 132
<> 144:ef7eb2e8f9f7 133 int gpio_is_connected(const gpio_t *obj){
<> 144:ef7eb2e8f9f7 134 if(obj->pin != (PinName)NC){
<> 144:ef7eb2e8f9f7 135 return 1;
<> 144:ef7eb2e8f9f7 136 } else {
<> 144:ef7eb2e8f9f7 137 return 0;
<> 144:ef7eb2e8f9f7 138 }
<> 144:ef7eb2e8f9f7 139 }
<> 144:ef7eb2e8f9f7 140