Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3/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 *******************************************************************************
<> 144:ef7eb2e8f9f7 3 * Copyright (c) 2014, STMicroelectronics
<> 144:ef7eb2e8f9f7 4 * All rights reserved.
<> 144:ef7eb2e8f9f7 5 *
<> 144:ef7eb2e8f9f7 6 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 7 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 10 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 12 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 13 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 15 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 16 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 17 *
<> 144:ef7eb2e8f9f7 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 28 *******************************************************************************
<> 144:ef7eb2e8f9f7 29 */
<> 144:ef7eb2e8f9f7 30 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 31 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 32 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 33 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 uint32_t gpio_set(PinName pin)
<> 144:ef7eb2e8f9f7 38 {
<> 144:ef7eb2e8f9f7 39 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 pin_function(pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 return (uint32_t)(1 << ((uint32_t)pin & 0xF)); // Return the pin mask
<> 144:ef7eb2e8f9f7 44 }
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 void gpio_init(gpio_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 47 {
<> 144:ef7eb2e8f9f7 48 obj->pin = pin;
<> 144:ef7eb2e8f9f7 49 if (pin == (PinName)NC) {
<> 144:ef7eb2e8f9f7 50 return;
<> 144:ef7eb2e8f9f7 51 }
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 56 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 57 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 // Fill GPIO object structure for future use
<> 144:ef7eb2e8f9f7 60 obj->mask = gpio_set(pin);
<> 144:ef7eb2e8f9f7 61 obj->reg_in = &gpio->IDR;
<> 144:ef7eb2e8f9f7 62 obj->reg_set = &gpio->BSRR;
<> 144:ef7eb2e8f9f7 63 obj->reg_clr = &gpio->BRR;
<> 144:ef7eb2e8f9f7 64 }
<> 144:ef7eb2e8f9f7 65
<> 144:ef7eb2e8f9f7 66 void gpio_mode(gpio_t *obj, PinMode mode)
<> 144:ef7eb2e8f9f7 67 {
<> 144:ef7eb2e8f9f7 68 pin_mode(obj->pin, mode);
<> 144:ef7eb2e8f9f7 69 }
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 void gpio_dir(gpio_t *obj, PinDirection direction)
<> 144:ef7eb2e8f9f7 72 {
<> 144:ef7eb2e8f9f7 73 MBED_ASSERT(obj->pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 74 if (direction == PIN_OUTPUT) {
<> 144:ef7eb2e8f9f7 75 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
<> 144:ef7eb2e8f9f7 76 } else { // PIN_INPUT
<> 144:ef7eb2e8f9f7 77 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 144:ef7eb2e8f9f7 78 }
<> 144:ef7eb2e8f9f7 79 }