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_STM32L0/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) 2015, 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 // Warning: order must be the same as the one defined in PinNames.h !!!
<> 144:ef7eb2e8f9f7 37 static const uint32_t gpio_mode[13] = {
<> 144:ef7eb2e8f9f7 38 0x00000000, // 0 = GPIO_MODE_INPUT
<> 144:ef7eb2e8f9f7 39 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
<> 144:ef7eb2e8f9f7 40 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
<> 144:ef7eb2e8f9f7 41 0x00000002, // 3 = GPIO_MODE_AF_PP
<> 144:ef7eb2e8f9f7 42 0x00000012, // 4 = GPIO_MODE_AF_OD
<> 144:ef7eb2e8f9f7 43 0x00000003, // 5 = GPIO_MODE_ANALOG
<> 144:ef7eb2e8f9f7 44 0x10110000, // 6 = GPIO_MODE_IT_RISING
<> 144:ef7eb2e8f9f7 45 0x10210000, // 7 = GPIO_MODE_IT_FALLING
<> 144:ef7eb2e8f9f7 46 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
<> 144:ef7eb2e8f9f7 47 0x10120000, // 9 = GPIO_MODE_EVT_RISING
<> 144:ef7eb2e8f9f7 48 0x10220000, // 10 = GPIO_MODE_EVT_FALLING
<> 144:ef7eb2e8f9f7 49 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
<> 144:ef7eb2e8f9f7 50 0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
<> 144:ef7eb2e8f9f7 51 };
<> 144:ef7eb2e8f9f7 52
<> 144:ef7eb2e8f9f7 53 // Enable GPIO clock and return GPIO base address
<> 144:ef7eb2e8f9f7 54 uint32_t Set_GPIO_Clock(uint32_t port_idx)
<> 144:ef7eb2e8f9f7 55 {
<> 144:ef7eb2e8f9f7 56 uint32_t gpio_add = 0;
<> 144:ef7eb2e8f9f7 57 switch (port_idx) {
<> 144:ef7eb2e8f9f7 58 case PortA:
<> 144:ef7eb2e8f9f7 59 gpio_add = GPIOA_BASE;
<> 144:ef7eb2e8f9f7 60 __GPIOA_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 61 break;
<> 144:ef7eb2e8f9f7 62 case PortB:
<> 144:ef7eb2e8f9f7 63 gpio_add = GPIOB_BASE;
<> 144:ef7eb2e8f9f7 64 __GPIOB_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 65 break;
<> 144:ef7eb2e8f9f7 66 #if defined(GPIOC_BASE)
<> 144:ef7eb2e8f9f7 67 case PortC:
<> 144:ef7eb2e8f9f7 68 gpio_add = GPIOC_BASE;
<> 144:ef7eb2e8f9f7 69 __GPIOC_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 70 break;
<> 144:ef7eb2e8f9f7 71 #endif
<> 144:ef7eb2e8f9f7 72 #if defined(GPIOD_BASE)
<> 144:ef7eb2e8f9f7 73 case PortD:
<> 144:ef7eb2e8f9f7 74 gpio_add = GPIOD_BASE;
<> 144:ef7eb2e8f9f7 75 __GPIOD_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 76 break;
<> 144:ef7eb2e8f9f7 77 #endif
<> 144:ef7eb2e8f9f7 78 #if defined(GPIOH_BASE)
<> 144:ef7eb2e8f9f7 79 case PortH:
<> 144:ef7eb2e8f9f7 80 gpio_add = GPIOH_BASE;
<> 144:ef7eb2e8f9f7 81 __GPIOH_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 82 break;
<> 144:ef7eb2e8f9f7 83 #endif
<> 144:ef7eb2e8f9f7 84 default:
<> 144:ef7eb2e8f9f7 85 error("Pinmap error: wrong port number.");
<> 144:ef7eb2e8f9f7 86 break;
<> 144:ef7eb2e8f9f7 87 }
<> 144:ef7eb2e8f9f7 88 return gpio_add;
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 /**
<> 144:ef7eb2e8f9f7 92 * Configure pin (mode, speed, output type and pull-up/pull-down)
<> 144:ef7eb2e8f9f7 93 */
<> 144:ef7eb2e8f9f7 94 void pin_function(PinName pin, int data)
<> 144:ef7eb2e8f9f7 95 {
<> 144:ef7eb2e8f9f7 96 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 97 // Get the pin informations
<> 144:ef7eb2e8f9f7 98 uint32_t mode = STM_PIN_MODE(data);
<> 144:ef7eb2e8f9f7 99 uint32_t pupd = STM_PIN_PUPD(data);
<> 144:ef7eb2e8f9f7 100 uint32_t afnum = STM_PIN_AFNUM(data);
<> 144:ef7eb2e8f9f7 101
<> 144:ef7eb2e8f9f7 102 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 103 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 106 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 107 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 // Configure GPIO
<> 144:ef7eb2e8f9f7 110 GPIO_InitTypeDef GPIO_InitStructure;
<> 144:ef7eb2e8f9f7 111 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
<> 144:ef7eb2e8f9f7 112 GPIO_InitStructure.Mode = gpio_mode[mode];
<> 144:ef7eb2e8f9f7 113 GPIO_InitStructure.Pull = pupd;
<> 144:ef7eb2e8f9f7 114 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
<> 144:ef7eb2e8f9f7 115 GPIO_InitStructure.Alternate = afnum;
<> 144:ef7eb2e8f9f7 116 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
<> 144:ef7eb2e8f9f7 117
<> 144:ef7eb2e8f9f7 118 // [TODO] Disconnect JTAG-DP + SW-DP signals.
<> 144:ef7eb2e8f9f7 119 // Warning: Need to reconnect under reset
<> 144:ef7eb2e8f9f7 120 //if ((pin == PA_13) || (pin == PA_14)) {
<> 144:ef7eb2e8f9f7 121 //
<> 144:ef7eb2e8f9f7 122 //}
<> 144:ef7eb2e8f9f7 123 //if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
<> 144:ef7eb2e8f9f7 124 //
<> 144:ef7eb2e8f9f7 125 //}
<> 144:ef7eb2e8f9f7 126 }
<> 144:ef7eb2e8f9f7 127
<> 144:ef7eb2e8f9f7 128 /**
<> 144:ef7eb2e8f9f7 129 * Configure pin pull-up/pull-down
<> 144:ef7eb2e8f9f7 130 */
<> 144:ef7eb2e8f9f7 131 void pin_mode(PinName pin, PinMode mode)
<> 144:ef7eb2e8f9f7 132 {
<> 144:ef7eb2e8f9f7 133 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 134 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 135 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 136
<> 144:ef7eb2e8f9f7 137 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 138 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 139 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 140
<> 144:ef7eb2e8f9f7 141 // Configure pull-up/pull-down resistors
<> 144:ef7eb2e8f9f7 142 uint32_t pupd = (uint32_t)mode;
<> 144:ef7eb2e8f9f7 143 if (pupd > 2)
<> 144:ef7eb2e8f9f7 144 {
<> 144:ef7eb2e8f9f7 145 pupd = 0; // Open-drain = No pull-up/No pull-down
<> 144:ef7eb2e8f9f7 146 }
<> 144:ef7eb2e8f9f7 147 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPD0 << (pin_index * 2)));
<> 144:ef7eb2e8f9f7 148 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
<> 144:ef7eb2e8f9f7 149
<> 144:ef7eb2e8f9f7 150 }