Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/port_api.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
64:41a834223ea3 
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
mbed_official 15:a81a8d6c1dfe 1 /* mbed Microcontroller Library
mbed_official 15:a81a8d6c1dfe 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 15:a81a8d6c1dfe 5 * you may not use this file except in compliance with the License.
mbed_official 15:a81a8d6c1dfe 6 * You may obtain a copy of the License at
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 15:a81a8d6c1dfe 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 15:a81a8d6c1dfe 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 15:a81a8d6c1dfe 13 * See the License for the specific language governing permissions and
mbed_official 15:a81a8d6c1dfe 14 * limitations under the License.
mbed_official 15:a81a8d6c1dfe 15 */
mbed_official 15:a81a8d6c1dfe 16 #include "port_api.h"
mbed_official 15:a81a8d6c1dfe 17 #include "pinmap.h"
mbed_official 15:a81a8d6c1dfe 18 #include "gpio_api.h"
mbed_official 15:a81a8d6c1dfe 19 #include "port.h"
mbed_official 15:a81a8d6c1dfe 20
mbed_official 64:41a834223ea3 21
mbed_official 15:a81a8d6c1dfe 22 #if defined(TARGET_SAMR21G18A)
mbed_official 15:a81a8d6c1dfe 23 #define PORTA_MASK 0xDBDFFFF3 // mask for available pins in Port A
mbed_official 15:a81a8d6c1dfe 24 #define PORTB_MASK 0xC0C3C30D // mask for available pins in Port B
mbed_official 15:a81a8d6c1dfe 25 #define PORTC_MASK 0x000D0000 // mask for available pins in Port C
mbed_official 15:a81a8d6c1dfe 26 #elif defined(TARGET_SAMD21J18A)
mbed_official 15:a81a8d6c1dfe 27 #define PORTA_MASK 0xDBFFFFFF // mask for available pins in Port A
mbed_official 15:a81a8d6c1dfe 28 #define PORTB_MASK 0xC0C3FFFF // mask for available pins in Port B
mbed_official 15:a81a8d6c1dfe 29 #elif defined(TARGET_SAMD21G18A)
mbed_official 15:a81a8d6c1dfe 30 #define PORTA_MASK 0xDBFFFFFF // mask for available pins in Port A
mbed_official 15:a81a8d6c1dfe 31 #define PORTB_MASK 0x00C00F0C // mask for available pins in Port B
mbed_official 18:da299f395b9e 32 #elif defined(TARGET_SAML21J18A)
mbed_official 18:da299f395b9e 33 #define PORTA_MASK 0xCBFFFFFF // mask for available pins in Port A
mbed_official 18:da299f395b9e 34 #define PORTB_MASK 0xC0C3FFFF // mask for available pins in Port B
mbed_official 15:a81a8d6c1dfe 35 #else
mbed_official 15:a81a8d6c1dfe 36 #endif
mbed_official 15:a81a8d6c1dfe 37
mbed_official 15:a81a8d6c1dfe 38 uint32_t start_pin(PortName port)
mbed_official 15:a81a8d6c1dfe 39 {
mbed_official 15:a81a8d6c1dfe 40 if(port < PortMax) { /* PortC value is 2*/
mbed_official 15:a81a8d6c1dfe 41 return port * 32;
mbed_official 15:a81a8d6c1dfe 42 } else {
mbed_official 64:41a834223ea3 43 return (uint32_t)NC;
mbed_official 15:a81a8d6c1dfe 44 }
mbed_official 15:a81a8d6c1dfe 45 }
mbed_official 15:a81a8d6c1dfe 46 void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
mbed_official 15:a81a8d6c1dfe 47 {
mbed_official 15:a81a8d6c1dfe 48 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 49 struct port_config pin_conf;
mbed_official 15:a81a8d6c1dfe 50 int i, j;
mbed_official 15:a81a8d6c1dfe 51 int start;
mbed_official 15:a81a8d6c1dfe 52
mbed_official 15:a81a8d6c1dfe 53 port_get_config_defaults(&pin_conf);
mbed_official 15:a81a8d6c1dfe 54 switch (dir) {
mbed_official 15:a81a8d6c1dfe 55 case PIN_INPUT :
mbed_official 15:a81a8d6c1dfe 56 pin_conf.direction = PORT_PIN_DIR_INPUT;
mbed_official 15:a81a8d6c1dfe 57 break;
mbed_official 15:a81a8d6c1dfe 58 case PIN_OUTPUT:
mbed_official 15:a81a8d6c1dfe 59 pin_conf.direction = PORT_PIN_DIR_OUTPUT;
mbed_official 15:a81a8d6c1dfe 60 break;
mbed_official 15:a81a8d6c1dfe 61 case PIN_INPUT_OUTPUT:
mbed_official 15:a81a8d6c1dfe 62 pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
mbed_official 15:a81a8d6c1dfe 63 break;
mbed_official 15:a81a8d6c1dfe 64 default:
mbed_official 15:a81a8d6c1dfe 65 return;
mbed_official 15:a81a8d6c1dfe 66 }
mbed_official 15:a81a8d6c1dfe 67
mbed_official 15:a81a8d6c1dfe 68 PortGroup *const port_base = (PortGroup*)port_get_group_from_gpio_pin(port * 32); // 32 pins in port // function reused to get the port base
mbed_official 15:a81a8d6c1dfe 69 if(port_base == NULL) return; /* returns NULL if invalid*/
mbed_official 15:a81a8d6c1dfe 70 switch (port) {
mbed_official 15:a81a8d6c1dfe 71 case PortA:
mbed_official 15:a81a8d6c1dfe 72 obj->mask = (uint32_t)mask & PORTA_MASK;
mbed_official 15:a81a8d6c1dfe 73 break;
mbed_official 15:a81a8d6c1dfe 74 case PortB:
mbed_official 15:a81a8d6c1dfe 75 obj->mask = (uint32_t)mask & PORTB_MASK;
mbed_official 15:a81a8d6c1dfe 76 break;
mbed_official 15:a81a8d6c1dfe 77 #if defined(TARGET_SAMR21G18A)
mbed_official 15:a81a8d6c1dfe 78 case PortC:
mbed_official 15:a81a8d6c1dfe 79 obj->mask = (uint32_t)mask & PORTC_MASK;
mbed_official 15:a81a8d6c1dfe 80 break;
mbed_official 15:a81a8d6c1dfe 81 #endif
mbed_official 15:a81a8d6c1dfe 82 default:
mbed_official 15:a81a8d6c1dfe 83 return;
mbed_official 15:a81a8d6c1dfe 84 }
mbed_official 15:a81a8d6c1dfe 85 start = start_pin(port);
mbed_official 15:a81a8d6c1dfe 86 if(start == NC)
mbed_official 15:a81a8d6c1dfe 87 return;
mbed_official 15:a81a8d6c1dfe 88 obj->port = port;
mbed_official 15:a81a8d6c1dfe 89 obj->direction = dir;
mbed_official 15:a81a8d6c1dfe 90 obj->powersave = pin_conf.powersave;
mbed_official 15:a81a8d6c1dfe 91 obj->mode = PORT_PIN_PULL_UP;
mbed_official 15:a81a8d6c1dfe 92
mbed_official 15:a81a8d6c1dfe 93 for (i = start, j = 0; j < 32; i++, j++) {
mbed_official 15:a81a8d6c1dfe 94 if (obj->mask & (1<<j)) {
mbed_official 15:a81a8d6c1dfe 95 port_pin_set_config((PinName)i, &pin_conf);
mbed_official 15:a81a8d6c1dfe 96 }
mbed_official 15:a81a8d6c1dfe 97 }
mbed_official 15:a81a8d6c1dfe 98 obj->OUTCLR = &port_base->OUTCLR.reg;
mbed_official 15:a81a8d6c1dfe 99 obj->OUTSET = &port_base->OUTSET.reg;
mbed_official 15:a81a8d6c1dfe 100 obj->IN = &port_base->IN.reg;
mbed_official 15:a81a8d6c1dfe 101 obj->OUT = &port_base->OUT.reg;
mbed_official 15:a81a8d6c1dfe 102 }
mbed_official 15:a81a8d6c1dfe 103
mbed_official 15:a81a8d6c1dfe 104 void port_mode(port_t *obj, PinMode mode)
mbed_official 15:a81a8d6c1dfe 105 {
mbed_official 15:a81a8d6c1dfe 106 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 107 int i, j;
mbed_official 15:a81a8d6c1dfe 108 int start;
mbed_official 15:a81a8d6c1dfe 109 start = start_pin(obj->port);
mbed_official 15:a81a8d6c1dfe 110 if(start == NC)
mbed_official 15:a81a8d6c1dfe 111 return;
mbed_official 15:a81a8d6c1dfe 112 for (i = start, j = 0; j < 32; i++, j++) {
mbed_official 15:a81a8d6c1dfe 113 if (obj->mask & (1<<j)) {
mbed_official 15:a81a8d6c1dfe 114 pin_mode((PinName)i , mode);
mbed_official 15:a81a8d6c1dfe 115 }
mbed_official 15:a81a8d6c1dfe 116 }
mbed_official 15:a81a8d6c1dfe 117 }
mbed_official 15:a81a8d6c1dfe 118
mbed_official 15:a81a8d6c1dfe 119 void port_dir(port_t *obj, PinDirection dir)
mbed_official 15:a81a8d6c1dfe 120 {
mbed_official 15:a81a8d6c1dfe 121 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 122 struct port_config pin_conf;
mbed_official 15:a81a8d6c1dfe 123 int i, j;
mbed_official 15:a81a8d6c1dfe 124 int start;
mbed_official 15:a81a8d6c1dfe 125
mbed_official 15:a81a8d6c1dfe 126 switch (dir) {
mbed_official 15:a81a8d6c1dfe 127 case PIN_INPUT :
mbed_official 15:a81a8d6c1dfe 128 pin_conf.direction = PORT_PIN_DIR_INPUT;
mbed_official 15:a81a8d6c1dfe 129 break;
mbed_official 15:a81a8d6c1dfe 130 case PIN_OUTPUT:
mbed_official 15:a81a8d6c1dfe 131 pin_conf.direction = PORT_PIN_DIR_OUTPUT;
mbed_official 15:a81a8d6c1dfe 132 break;
mbed_official 15:a81a8d6c1dfe 133 case PIN_INPUT_OUTPUT:
mbed_official 15:a81a8d6c1dfe 134 pin_conf.direction = PORT_PIN_DIR_OUTPUT_WTH_READBACK;
mbed_official 15:a81a8d6c1dfe 135 break;
mbed_official 15:a81a8d6c1dfe 136 default:
mbed_official 15:a81a8d6c1dfe 137 return;
mbed_official 15:a81a8d6c1dfe 138 }
mbed_official 15:a81a8d6c1dfe 139 start = start_pin(obj->port);
mbed_official 15:a81a8d6c1dfe 140 if(start == NC)
mbed_official 15:a81a8d6c1dfe 141 return;
mbed_official 15:a81a8d6c1dfe 142 obj->direction = dir;
mbed_official 64:41a834223ea3 143 pin_conf.input_pull = (enum port_pin_pull)obj->mode;
mbed_official 15:a81a8d6c1dfe 144 pin_conf.powersave = obj->powersave;
mbed_official 15:a81a8d6c1dfe 145
mbed_official 15:a81a8d6c1dfe 146 for (i = start, j = 0; j < 32; i++, j++) {
mbed_official 15:a81a8d6c1dfe 147 if (obj->mask & (1<<j)) {
mbed_official 15:a81a8d6c1dfe 148 port_pin_set_config((PinName)i, &pin_conf);
mbed_official 15:a81a8d6c1dfe 149 }
mbed_official 15:a81a8d6c1dfe 150 }
mbed_official 15:a81a8d6c1dfe 151 }
mbed_official 15:a81a8d6c1dfe 152
mbed_official 15:a81a8d6c1dfe 153 void port_write(port_t *obj, int value)
mbed_official 15:a81a8d6c1dfe 154 {
mbed_official 15:a81a8d6c1dfe 155 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 156 int i;
mbed_official 15:a81a8d6c1dfe 157 int start;
mbed_official 15:a81a8d6c1dfe 158 start = start_pin(obj->port);
mbed_official 15:a81a8d6c1dfe 159 if(start == NC)
mbed_official 15:a81a8d6c1dfe 160 return;
mbed_official 15:a81a8d6c1dfe 161 for (i = 0; i < 32 ; i++) {
mbed_official 15:a81a8d6c1dfe 162 if (obj->mask & (1<<i)) {
mbed_official 15:a81a8d6c1dfe 163 if (value & (1<<i)) {
mbed_official 15:a81a8d6c1dfe 164 *obj->OUTSET = 1 << i;
mbed_official 15:a81a8d6c1dfe 165 } else {
mbed_official 15:a81a8d6c1dfe 166 *obj->OUTCLR = 1 << i;
mbed_official 15:a81a8d6c1dfe 167 }
mbed_official 15:a81a8d6c1dfe 168 }
mbed_official 15:a81a8d6c1dfe 169 }
mbed_official 15:a81a8d6c1dfe 170 }
mbed_official 15:a81a8d6c1dfe 171
mbed_official 15:a81a8d6c1dfe 172 int port_read(port_t *obj)
mbed_official 15:a81a8d6c1dfe 173 {
mbed_official 15:a81a8d6c1dfe 174 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 175 if (obj->direction == PIN_OUTPUT) {
mbed_official 15:a81a8d6c1dfe 176 return (*obj->OUT & obj->mask);
mbed_official 15:a81a8d6c1dfe 177 } else {
mbed_official 15:a81a8d6c1dfe 178 return (*obj->IN & obj->mask);
mbed_official 15:a81a8d6c1dfe 179 }
mbed_official 15:a81a8d6c1dfe 180 }