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_STM32F1/pinmap.c@144:ef7eb2e8f9f7, 2016-09-02 (annotated)

Committer:
<>
Date:
Fri Sep 02 15:07:44 2016 +0100
Revision:
144:ef7eb2e8f9f7
Parent:
0:9b334a45a8ff 
This updates the lib to the mbed lib v125

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 // Warning: the elements 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 GPIO_MODE_INPUT, // 0 = STM_MODE_INPUT
<> 144:ef7eb2e8f9f7 39 GPIO_MODE_OUTPUT_PP, // 1 = STM_MODE_OUTPUT_PP
<> 144:ef7eb2e8f9f7 40 GPIO_MODE_OUTPUT_OD, // 2 = STM_MODE_OUTPUT_OD
<> 144:ef7eb2e8f9f7 41 GPIO_MODE_AF_PP, // 3 = STM_MODE_AF_PP
<> 144:ef7eb2e8f9f7 42 GPIO_MODE_AF_OD, // 4 = STM_MODE_AF_OD
<> 144:ef7eb2e8f9f7 43 GPIO_MODE_ANALOG, // 5 = STM_MODE_ANALOG
<> 144:ef7eb2e8f9f7 44 GPIO_MODE_IT_RISING, // 6 = STM_MODE_IT_RISING
<> 144:ef7eb2e8f9f7 45 GPIO_MODE_IT_FALLING, // 7 = STM_MODE_IT_FALLING
<> 144:ef7eb2e8f9f7 46 GPIO_MODE_IT_RISING_FALLING, // 8 = STM_MODE_IT_RISING_FALLING
<> 144:ef7eb2e8f9f7 47 GPIO_MODE_EVT_RISING, // 9 = STM_MODE_EVT_RISING
<> 144:ef7eb2e8f9f7 48 GPIO_MODE_EVT_FALLING, // 10 = STM_MODE_EVT_FALLING
<> 144:ef7eb2e8f9f7 49 GPIO_MODE_EVT_RISING_FALLING, // 11 = STM_MODE_EVT_RISING_FALLING
<> 144:ef7eb2e8f9f7 50 0x10000000 // 12 = STM_MODE_IT_EVT_RESET (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 case PortC:
<> 144:ef7eb2e8f9f7 67 gpio_add = GPIOC_BASE;
<> 144:ef7eb2e8f9f7 68 __GPIOC_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 69 break;
<> 144:ef7eb2e8f9f7 70 case PortD:
<> 144:ef7eb2e8f9f7 71 gpio_add = GPIOD_BASE;
<> 144:ef7eb2e8f9f7 72 __GPIOD_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 73 break;
<> 144:ef7eb2e8f9f7 74 default:
<> 144:ef7eb2e8f9f7 75 error("Pinmap error: wrong port number.");
<> 144:ef7eb2e8f9f7 76 break;
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78 return gpio_add;
<> 144:ef7eb2e8f9f7 79 }
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 /**
<> 144:ef7eb2e8f9f7 82 * Configure pin (input, output, alternate function or analog) + output speed + AF
<> 144:ef7eb2e8f9f7 83 */
<> 144:ef7eb2e8f9f7 84 void pin_function(PinName pin, int data)
<> 144:ef7eb2e8f9f7 85 {
<> 144:ef7eb2e8f9f7 86 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 87 // Get the pin informations
<> 144:ef7eb2e8f9f7 88 uint32_t mode = STM_PIN_MODE(data);
<> 144:ef7eb2e8f9f7 89 uint32_t pupd = STM_PIN_PUPD(data);
<> 144:ef7eb2e8f9f7 90 uint32_t afnum = STM_PIN_AFNUM(data);
<> 144:ef7eb2e8f9f7 91
<> 144:ef7eb2e8f9f7 92 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 93 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 96 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 97 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 // Enable AFIO clock
<> 144:ef7eb2e8f9f7 100 __HAL_RCC_AFIO_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 101
<> 144:ef7eb2e8f9f7 102 // Configure Alternate Function
<> 144:ef7eb2e8f9f7 103 // Warning: Must be done before the GPIO is initialized
<> 144:ef7eb2e8f9f7 104 if (afnum > 0) {
<> 144:ef7eb2e8f9f7 105 switch (afnum) {
<> 144:ef7eb2e8f9f7 106 case 1: // Remap SPI1
<> 144:ef7eb2e8f9f7 107 __HAL_AFIO_REMAP_SPI1_ENABLE();
<> 144:ef7eb2e8f9f7 108 break;
<> 144:ef7eb2e8f9f7 109 case 2: // Remap I2C1
<> 144:ef7eb2e8f9f7 110 __HAL_AFIO_REMAP_I2C1_ENABLE();
<> 144:ef7eb2e8f9f7 111 break;
<> 144:ef7eb2e8f9f7 112 case 3: // Remap USART1
<> 144:ef7eb2e8f9f7 113 __HAL_AFIO_REMAP_USART1_ENABLE();
<> 144:ef7eb2e8f9f7 114 break;
<> 144:ef7eb2e8f9f7 115 case 4: // Remap USART2
<> 144:ef7eb2e8f9f7 116 __HAL_AFIO_REMAP_USART2_ENABLE();
<> 144:ef7eb2e8f9f7 117 break;
<> 144:ef7eb2e8f9f7 118 case 5: // Partial Remap USART3
<> 144:ef7eb2e8f9f7 119 __HAL_AFIO_REMAP_USART3_PARTIAL();
<> 144:ef7eb2e8f9f7 120 break;
<> 144:ef7eb2e8f9f7 121 case 6: // Partial Remap TIM1
<> 144:ef7eb2e8f9f7 122 __HAL_AFIO_REMAP_TIM1_PARTIAL();
<> 144:ef7eb2e8f9f7 123 break;
<> 144:ef7eb2e8f9f7 124 case 7: // Partial Remap TIM3
<> 144:ef7eb2e8f9f7 125 __HAL_AFIO_REMAP_TIM3_PARTIAL();
<> 144:ef7eb2e8f9f7 126 break;
<> 144:ef7eb2e8f9f7 127 case 8: // Full Remap TIM2
<> 144:ef7eb2e8f9f7 128 __HAL_AFIO_REMAP_TIM2_ENABLE();
<> 144:ef7eb2e8f9f7 129 break;
<> 144:ef7eb2e8f9f7 130 case 9: // Full Remap TIM3
<> 144:ef7eb2e8f9f7 131 __HAL_AFIO_REMAP_TIM3_ENABLE();
<> 144:ef7eb2e8f9f7 132 break;
<> 144:ef7eb2e8f9f7 133 default:
<> 144:ef7eb2e8f9f7 134 break;
<> 144:ef7eb2e8f9f7 135 }
<> 144:ef7eb2e8f9f7 136 }
<> 144:ef7eb2e8f9f7 137
<> 144:ef7eb2e8f9f7 138 // Configure GPIO
<> 144:ef7eb2e8f9f7 139 GPIO_InitTypeDef GPIO_InitStructure;
<> 144:ef7eb2e8f9f7 140 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
<> 144:ef7eb2e8f9f7 141 GPIO_InitStructure.Mode = gpio_mode[mode];
<> 144:ef7eb2e8f9f7 142 GPIO_InitStructure.Pull = pupd;
<> 144:ef7eb2e8f9f7 143 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
<> 144:ef7eb2e8f9f7 144 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
<> 144:ef7eb2e8f9f7 145
<> 144:ef7eb2e8f9f7 146 // Disconnect JTAG-DP + SW-DP signals.
<> 144:ef7eb2e8f9f7 147 // Warning: Need to reconnect under reset
<> 144:ef7eb2e8f9f7 148 if ((pin == PA_13) || (pin == PA_14)) {
<> 144:ef7eb2e8f9f7 149 __HAL_AFIO_REMAP_SWJ_DISABLE(); // JTAG-DP Disabled and SW-DP Disabled
<> 144:ef7eb2e8f9f7 150 }
<> 144:ef7eb2e8f9f7 151 if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
<> 144:ef7eb2e8f9f7 152 __HAL_AFIO_REMAP_SWJ_NOJTAG(); // JTAG-DP Disabled and SW-DP enabled
<> 144:ef7eb2e8f9f7 153 }
<> 144:ef7eb2e8f9f7 154 }
<> 144:ef7eb2e8f9f7 155
<> 144:ef7eb2e8f9f7 156 /**
<> 144:ef7eb2e8f9f7 157 * Configure pin pull-up/pull-down
<> 144:ef7eb2e8f9f7 158 */
<> 144:ef7eb2e8f9f7 159 void pin_mode(PinName pin, PinMode mode)
<> 144:ef7eb2e8f9f7 160 {
<> 144:ef7eb2e8f9f7 161 MBED_ASSERT(pin != (PinName)NC);
<> 144:ef7eb2e8f9f7 162
<> 144:ef7eb2e8f9f7 163 uint32_t port_index = STM_PORT(pin);
<> 144:ef7eb2e8f9f7 164 uint32_t pin_index = STM_PIN(pin);
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 // Enable GPIO clock
<> 144:ef7eb2e8f9f7 167 uint32_t gpio_add = Set_GPIO_Clock(port_index);
<> 144:ef7eb2e8f9f7 168 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
<> 144:ef7eb2e8f9f7 169
<> 144:ef7eb2e8f9f7 170 // Configure open-drain and pull-up/down
<> 144:ef7eb2e8f9f7 171 switch (mode) {
<> 144:ef7eb2e8f9f7 172 case PullNone:
<> 144:ef7eb2e8f9f7 173 break;
<> 144:ef7eb2e8f9f7 174 case PullUp:
<> 144:ef7eb2e8f9f7 175 case PullDown:
<> 144:ef7eb2e8f9f7 176 // Set pull-up / pull-down for Input mode
<> 144:ef7eb2e8f9f7 177 if (pin_index < 8) {
<> 144:ef7eb2e8f9f7 178 if ((gpio->CRL & (0x03 << (pin_index * 4))) == 0) { // MODE bits = Input mode
<> 144:ef7eb2e8f9f7 179 gpio->CRL |= (0x08 << (pin_index * 4)); // Set pull-up / pull-down
<> 144:ef7eb2e8f9f7 180 gpio->CRL &= ~(0x04 << (pin_index * 4)); // ENSURES GPIOx_CRL.CNFx.bit0 = 0
<> 144:ef7eb2e8f9f7 181 }
<> 144:ef7eb2e8f9f7 182 } else {
<> 144:ef7eb2e8f9f7 183 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) == 0) { // MODE bits = Input mode
<> 144:ef7eb2e8f9f7 184 gpio->CRH |= (0x08 << ((pin_index % 8) * 4)); // Set pull-up / pull-down
<> 144:ef7eb2e8f9f7 185 gpio->CRH &= ~(0x04 << ((pin_index % 8) * 4)); // ENSURES GPIOx_CRH.CNFx.bit0 = 0
<> 144:ef7eb2e8f9f7 186 }
<> 144:ef7eb2e8f9f7 187 }
<> 144:ef7eb2e8f9f7 188 // Now it's time to setup properly if pullup or pulldown. This is done in ODR register:
<> 144:ef7eb2e8f9f7 189 // set pull-up => bit=1, set pull-down => bit = 0
<> 144:ef7eb2e8f9f7 190 if (mode == PullUp) {
<> 144:ef7eb2e8f9f7 191 gpio->ODR |= (0x01 << (pin_index)); // Set pull-up
<> 144:ef7eb2e8f9f7 192 } else{
<> 144:ef7eb2e8f9f7 193 gpio->ODR &= ~(0x01 << (pin_index)); // Set pull-down
<> 144:ef7eb2e8f9f7 194 }
<> 144:ef7eb2e8f9f7 195 break;
<> 144:ef7eb2e8f9f7 196 case OpenDrain:
<> 144:ef7eb2e8f9f7 197 // Set open-drain for Output mode (General Purpose or Alternate Function)
<> 144:ef7eb2e8f9f7 198 if (pin_index < 8) {
<> 144:ef7eb2e8f9f7 199 if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode
<> 144:ef7eb2e8f9f7 200 gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain
<> 144:ef7eb2e8f9f7 201 }
<> 144:ef7eb2e8f9f7 202 } else {
<> 144:ef7eb2e8f9f7 203 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode
<> 144:ef7eb2e8f9f7 204 gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain
<> 144:ef7eb2e8f9f7 205 }
<> 144:ef7eb2e8f9f7 206 }
<> 144:ef7eb2e8f9f7 207 break;
<> 144:ef7eb2e8f9f7 208 default:
<> 144:ef7eb2e8f9f7 209 break;
<> 144:ef7eb2e8f9f7 210 }
<> 144:ef7eb2e8f9f7 211 }