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_BEETLE/port_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) 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 "port_api.h"
<> 144:ef7eb2e8f9f7 17 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 18 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 PinName port_pin(PortName port, int pin_n) {
<> 144:ef7eb2e8f9f7 21 return (PinName)((port << PORT_SHIFT) | pin_n);
<> 144:ef7eb2e8f9f7 22 }
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 void port_init(port_t *obj, PortName port, int mask, PinDirection dir) {
<> 144:ef7eb2e8f9f7 25 obj->port = port;
<> 144:ef7eb2e8f9f7 26 obj->mask = mask;
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 CMSDK_GPIO_TypeDef *port_reg =
<> 144:ef7eb2e8f9f7 29 (CMSDK_GPIO_TypeDef *)(CMSDK_GPIO0_BASE + ((int)port * 0x10));
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 obj->reg_in = &port_reg->DATAOUT;
<> 144:ef7eb2e8f9f7 32 obj->reg_dir = &port_reg->OUTENABLESET;
<> 144:ef7eb2e8f9f7 33 obj->reg_dirclr = &port_reg->OUTENABLECLR;
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 uint32_t i;
<> 144:ef7eb2e8f9f7 36 // The function is set per pin: reuse gpio logic
<> 144:ef7eb2e8f9f7 37 for (i=0; i<16; i++) {
<> 144:ef7eb2e8f9f7 38 if (obj->mask & (1<<i)) {
<> 144:ef7eb2e8f9f7 39 gpio_set(port_pin(obj->port, i));
<> 144:ef7eb2e8f9f7 40 }
<> 144:ef7eb2e8f9f7 41 }
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 port_dir(obj, dir);
<> 144:ef7eb2e8f9f7 44 }
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 void port_mode(port_t *obj, PinMode mode) {
<> 144:ef7eb2e8f9f7 47 uint32_t i;
<> 144:ef7eb2e8f9f7 48 // The mode is set per pin: reuse pinmap logic
<> 144:ef7eb2e8f9f7 49 for (i=0; i<32; i++) {
<> 144:ef7eb2e8f9f7 50 if (obj->mask & (1<<i)) {
<> 144:ef7eb2e8f9f7 51 pin_mode(port_pin(obj->port, i), mode);
<> 144:ef7eb2e8f9f7 52 }
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54 }
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 void port_dir(port_t *obj, PinDirection dir) {
<> 144:ef7eb2e8f9f7 57 switch (dir) {
<> 144:ef7eb2e8f9f7 58 case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
<> 144:ef7eb2e8f9f7 59 case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61 }
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 void port_write(port_t *obj, int value) {
<> 144:ef7eb2e8f9f7 64 *obj->reg_in = value;
<> 144:ef7eb2e8f9f7 65 }
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 int port_read(port_t *obj) {
<> 144:ef7eb2e8f9f7 68 return (*obj->reg_in);
<> 144:ef7eb2e8f9f7 69 }
<> 144:ef7eb2e8f9f7 70