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_STM32F0/pinmap.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 "pinmap.h"
<> 144:ef7eb2e8f9f7 32 #include "PortNames.h"
<> 144:ef7eb2e8f9f7 33 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 // GPIO mode look-up table
<> 144:ef7eb2e8f9f7 36 static const uint32_t gpio_mode[13] = {
<> 144:ef7eb2e8f9f7 37 0x00000000, // 0 = GPIO_MODE_INPUT
<> 144:ef7eb2e8f9f7 38 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
<> 144:ef7eb2e8f9f7 39 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
<> 144:ef7eb2e8f9f7 40 0x00000002, // 3 = GPIO_MODE_AF_PP
<> 144:ef7eb2e8f9f7 41 0x00000012, // 4 = GPIO_MODE_AF_OD
<> 144:ef7eb2e8f9f7 42 0x00000003, // 5 = GPIO_MODE_ANALOG
<> 144:ef7eb2e8f9f7 43 0x10110000, // 6 = GPIO_MODE_IT_RISING
<> 144:ef7eb2e8f9f7 44 0x10210000, // 7 = GPIO_MODE_IT_FALLING
<> 144:ef7eb2e8f9f7 45 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
<> 144:ef7eb2e8f9f7 46 0x10120000, // 9 = GPIO_MODE_EVT_RISING
<> 144:ef7eb2e8f9f7 47 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
<> 144:ef7eb2e8f9f7 48 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
<> 144:ef7eb2e8f9f7 49 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
<> 144:ef7eb2e8f9f7 50 };
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 // Enable GPIO clock and return GPIO base address
<> 144:ef7eb2e8f9f7 53 uint32_t Set_GPIO_Clock(uint32_t port_idx) {
<> 144:ef7eb2e8f9f7 54 uint32_t gpio_add = 0;
<> 144:ef7eb2e8f9f7 55 switch (port_idx) {
<> 144:ef7eb2e8f9f7 56 case PortA:
<> 144:ef7eb2e8f9f7 57 gpio_add = GPIOA_BASE;
<> 144:ef7eb2e8f9f7 58 __GPIOA_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 59 break;
<> 144:ef7eb2e8f9f7 60 case PortB:
<> 144:ef7eb2e8f9f7 61 gpio_add = GPIOB_BASE;
<> 144:ef7eb2e8f9f7 62 __GPIOB_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 63 break;
<> 144:ef7eb2e8f9f7 64 #if defined(GPIOC_BASE)
<> 144:ef7eb2e8f9f7 65 case PortC:
<> 144:ef7eb2e8f9f7 66 gpio_add = GPIOC_BASE;
<> 144:ef7eb2e8f9f7 67 __GPIOC_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 68 break;
<> 144:ef7eb2e8f9f7 69 #endif
<> 144:ef7eb2e8f9f7 70 #if defined(GPIOD_BASE)
<> 144:ef7eb2e8f9f7 71 case PortD:
<> 144:ef7eb2e8f9f7 72 gpio_add = GPIOD_BASE;
<> 144:ef7eb2e8f9f7 73 __GPIOD_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 74 break;
<> 144:ef7eb2e8f9f7 75 #endif
<> 144:ef7eb2e8f9f7 76 #if defined(GPIOF_BASE)
<> 144:ef7eb2e8f9f7 77 case PortF:
<> 144:ef7eb2e8f9f7 78 gpio_add = GPIOF_BASE;
<> 144:ef7eb2e8f9f7 79 __GPIOF_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 80 break;
<> 144:ef7eb2e8f9f7 81 #endif
<> 144:ef7eb2e8f9f7 82 default:
<> 144:ef7eb2e8f9f7 83 error("Pinmap error: wrong port number.");
<> 144:ef7eb2e8f9f7 84 break;
<> 144:ef7eb2e8f9f7 85 }
<> 144:ef7eb2e8f9f7 86 return gpio_add;
<> 144:ef7eb2e8f9f7 87 }
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 /**
<> 144:ef7eb2e8f9f7 90 * Configure pin (mode, speed, output type and pull-up/pull-down)
<> 144:ef7eb2e8f9f7 91 */
<> 144:ef7eb2e8f9f7 92 void pin_function(PinName pin, int data) {
<> 144:ef7eb2e8f9f7 93 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 // Get the pin informations
<> 144:ef7eb2e8f9f7 96 uint32_t mode = STM_PIN_MODE(data);
<> 144:ef7eb2e8f9f7 97 uint32_t pupd = STM_PIN_PUPD(data);
<> 144:ef7eb2e8f9f7 98 uint32_t afnum = STM_PIN_AFNUM(data);
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 101 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 104 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 105 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 106
<> 144:ef7eb2e8f9f7 107 // Configure GPIO
<> 144:ef7eb2e8f9f7 108 GPIO_InitTypeDef GPIO_InitStructure;
<> 144:ef7eb2e8f9f7 109 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
<> 144:ef7eb2e8f9f7 110 GPIO_InitStructure.Mode = gpio_mode[mode];
<> 144:ef7eb2e8f9f7 111 GPIO_InitStructure.Pull = pupd;
<> 144:ef7eb2e8f9f7 112 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
<> 144:ef7eb2e8f9f7 113 GPIO_InitStructure.Alternate = afnum;
<> 144:ef7eb2e8f9f7 114 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
<> 144:ef7eb2e8f9f7 115
<> 144:ef7eb2e8f9f7 116 // [TODO] Disconnect SWDIO and SWCLK signals ?
<> 144:ef7eb2e8f9f7 117 // Warning: For debugging it is necessary to reconnect under reset if this is done.
<> 144:ef7eb2e8f9f7 118 //if ((pin == PA_13) || (pin == PA_14)) {
<> 144:ef7eb2e8f9f7 119 //
<> 144:ef7eb2e8f9f7 120 //}
<> 144:ef7eb2e8f9f7 121 }
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 /**
<> 144:ef7eb2e8f9f7 124 * Configure pin pull-up/pull-down
<> 144:ef7eb2e8f9f7 125 */
<> 144:ef7eb2e8f9f7 126 void pin_mode(PinName pin, PinMode mode) {
<> 144:ef7eb2e8f9f7 127 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 128
<> 144:ef7eb2e8f9f7 129 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 130 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 131
<> 144:ef7eb2e8f9f7 132 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 133 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 134 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 135
<> 144:ef7eb2e8f9f7 136 // Configure pull-up/pull-down resistors
<> 144:ef7eb2e8f9f7 137 uint32_t pupd = (uint32_t)mode;
<> 144:ef7eb2e8f9f7 138 if (pupd > 2) pupd = 0; // Open-drain = No pull-up/No pull-down
<> 144:ef7eb2e8f9f7 139 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
<> 144:ef7eb2e8f9f7 140 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
<> 144:ef7eb2e8f9f7 141
<> 144:ef7eb2e8f9f7 142 }