Maxim Ibragimov / mbed-dev

mbed library sources. Supersedes mbed-src. Fixed broken STM32F1xx RTC on rtc_api.c

Dependents:   Nucleo_F103RB_RTC_battery_bkup_pwr_off_okay

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F1/analogin_api.c@177:619788de047e, 2017-11-07 (annotated)

Committer:
maxxir
Date:
Tue Nov 07 16:46:29 2017 +0000
Revision:
177:619788de047e
Parent:
172:7d866c31b3c5 
To fix broken RTC on Nucleo_F103RB / STM32F103 BluePill etc..;  Used direct RTC register manipulation for STM32F1xx;  rtc_read() && rtc_write()  (native rtc_init() - works good);  also added stub for non-working on STM32F1xx rtc_read_subseconds().

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 * Copyright (c) 2016, STMicroelectronics
<> 149:156823d33999 3 * All rights reserved.
<> 149:156823d33999 4 *
<> 149:156823d33999 5 * Redistribution and use in source and binary forms, with or without
<> 149:156823d33999 6 * modification, are permitted provided that the following conditions are met:
<> 149:156823d33999 7 *
<> 149:156823d33999 8 * 1. Redistributions of source code must retain the above copyright notice,
<> 149:156823d33999 9 * this list of conditions and the following disclaimer.
<> 149:156823d33999 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 149:156823d33999 11 * this list of conditions and the following disclaimer in the documentation
<> 149:156823d33999 12 * and/or other materials provided with the distribution.
<> 149:156823d33999 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 149:156823d33999 14 * may be used to endorse or promote products derived from this software
<> 149:156823d33999 15 * without specific prior written permission.
<> 149:156823d33999 16 *
<> 149:156823d33999 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 149:156823d33999 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 149:156823d33999 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 149:156823d33999 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 149:156823d33999 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 149:156823d33999 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 149:156823d33999 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 149:156823d33999 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 149:156823d33999 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 149:156823d33999 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 149:156823d33999 27 */
<> 149:156823d33999 28 #include "mbed_assert.h"
<> 149:156823d33999 29 #include "analogin_api.h"
<> 149:156823d33999 30
<> 149:156823d33999 31 #if DEVICE_ANALOGIN
<> 149:156823d33999 32
<> 160:d5399cc887bb 33 #include "mbed_wait_api.h"
<> 149:156823d33999 34 #include "cmsis.h"
<> 149:156823d33999 35 #include "pinmap.h"
<> 149:156823d33999 36 #include "PeripheralPins.h"
<> 149:156823d33999 37
<> 149:156823d33999 38 int adc_inited = 0;
<> 149:156823d33999 39
<> 149:156823d33999 40 void analogin_init(analogin_t *obj, PinName pin)
<> 149:156823d33999 41 {
<> 149:156823d33999 42 RCC_PeriphCLKInitTypeDef PeriphClkInit;
AnnaBridge 172:7d866c31b3c5 43 uint32_t function = (uint32_t)NC;
<> 149:156823d33999 44
AnnaBridge 172:7d866c31b3c5 45 // ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
AnnaBridge 172:7d866c31b3c5 46 // are described in PinNames.h and PeripheralPins.c
AnnaBridge 172:7d866c31b3c5 47 // Pin value must be between 0xF0 and 0xFF
AnnaBridge 172:7d866c31b3c5 48 if ((pin < 0xF0) || (pin >= 0x100)) {
AnnaBridge 172:7d866c31b3c5 49 // Normal channels
AnnaBridge 172:7d866c31b3c5 50 // Get the peripheral name from the pin and assign it to the object
AnnaBridge 172:7d866c31b3c5 51 obj->handle.Instance = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC);
AnnaBridge 172:7d866c31b3c5 52 // Get the functions (adc channel) from the pin and assign it to the object
AnnaBridge 172:7d866c31b3c5 53 function = pinmap_function(pin, PinMap_ADC);
AnnaBridge 172:7d866c31b3c5 54 // Configure GPIO
AnnaBridge 172:7d866c31b3c5 55 pinmap_pinout(pin, PinMap_ADC);
AnnaBridge 172:7d866c31b3c5 56 } else {
AnnaBridge 172:7d866c31b3c5 57 // Internal channels
AnnaBridge 172:7d866c31b3c5 58 obj->handle.Instance = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC_Internal);
AnnaBridge 172:7d866c31b3c5 59 function = pinmap_function(pin, PinMap_ADC_Internal);
AnnaBridge 172:7d866c31b3c5 60 // No GPIO configuration for internal channels
AnnaBridge 172:7d866c31b3c5 61 }
AnnaBridge 171:89b338f31ef1 62 MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
<> 149:156823d33999 63 MBED_ASSERT(function != (uint32_t)NC);
AnnaBridge 172:7d866c31b3c5 64
<> 149:156823d33999 65 obj->channel = STM_PIN_CHANNEL(function);
<> 149:156823d33999 66
<> 149:156823d33999 67 // Save pin number for the read function
<> 149:156823d33999 68 obj->pin = pin;
<> 149:156823d33999 69
<> 149:156823d33999 70 // The ADC initialization is done once
<> 149:156823d33999 71 if (adc_inited == 0) {
<> 149:156823d33999 72 adc_inited = 1;
<> 149:156823d33999 73
<> 149:156823d33999 74 // Enable ADC clock
<> 149:156823d33999 75 __HAL_RCC_ADC1_CLK_ENABLE();
<> 149:156823d33999 76
<> 149:156823d33999 77 // Configure ADC clock prescaler
<> 149:156823d33999 78 // Caution: On STM32F1, ADC clock frequency max is 14 MHz (refer to device datasheet).
<> 149:156823d33999 79 // Therefore, ADC clock prescaler must be configured in function
<> 149:156823d33999 80 // of ADC clock source frequency to remain below this maximum frequency.
<> 149:156823d33999 81 // with 8 MHz external xtal: PCLK2 = 72 MHz --> ADC clock = 72/6 = 12 MHz
<> 149:156823d33999 82 // with internal clock : PCLK2 = 64 MHz --> ADC clock = 64/6 = 10.67 MHz
<> 149:156823d33999 83 PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
<> 149:156823d33999 84 PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
<> 149:156823d33999 85 HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
<> 149:156823d33999 86
<> 149:156823d33999 87 // Configure ADC
AnnaBridge 171:89b338f31ef1 88 obj->handle.State = HAL_ADC_STATE_RESET;
AnnaBridge 171:89b338f31ef1 89 obj->handle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
AnnaBridge 171:89b338f31ef1 90 obj->handle.Init.ScanConvMode = DISABLE;
AnnaBridge 171:89b338f31ef1 91 obj->handle.Init.ContinuousConvMode = DISABLE;
AnnaBridge 171:89b338f31ef1 92 obj->handle.Init.NbrOfConversion = 1;
AnnaBridge 171:89b338f31ef1 93 obj->handle.Init.DiscontinuousConvMode = DISABLE;
AnnaBridge 171:89b338f31ef1 94 obj->handle.Init.NbrOfDiscConversion = 0;
AnnaBridge 171:89b338f31ef1 95 obj->handle.Init.ExternalTrigConv = ADC_SOFTWARE_START;
AnnaBridge 171:89b338f31ef1 96 HAL_ADC_Init(&obj->handle);
<> 149:156823d33999 97 }
<> 149:156823d33999 98 }
<> 149:156823d33999 99
<> 149:156823d33999 100 static inline uint16_t adc_read(analogin_t *obj)
<> 149:156823d33999 101 {
<> 149:156823d33999 102 ADC_ChannelConfTypeDef sConfig;
<> 149:156823d33999 103
<> 149:156823d33999 104 // Configure ADC channel
<> 149:156823d33999 105 sConfig.Rank = 1;
<> 149:156823d33999 106 sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
<> 149:156823d33999 107
<> 149:156823d33999 108 switch (obj->channel) {
<> 149:156823d33999 109 case 0:
<> 149:156823d33999 110 sConfig.Channel = ADC_CHANNEL_0;
<> 149:156823d33999 111 break;
<> 149:156823d33999 112 case 1:
<> 149:156823d33999 113 sConfig.Channel = ADC_CHANNEL_1;
<> 149:156823d33999 114 break;
<> 149:156823d33999 115 case 2:
<> 149:156823d33999 116 sConfig.Channel = ADC_CHANNEL_2;
<> 149:156823d33999 117 break;
<> 149:156823d33999 118 case 3:
<> 149:156823d33999 119 sConfig.Channel = ADC_CHANNEL_3;
<> 149:156823d33999 120 break;
<> 149:156823d33999 121 case 4:
<> 149:156823d33999 122 sConfig.Channel = ADC_CHANNEL_4;
<> 149:156823d33999 123 break;
<> 149:156823d33999 124 case 5:
<> 149:156823d33999 125 sConfig.Channel = ADC_CHANNEL_5;
<> 149:156823d33999 126 break;
<> 149:156823d33999 127 case 6:
<> 149:156823d33999 128 sConfig.Channel = ADC_CHANNEL_6;
<> 149:156823d33999 129 break;
<> 149:156823d33999 130 case 7:
<> 149:156823d33999 131 sConfig.Channel = ADC_CHANNEL_7;
<> 149:156823d33999 132 break;
<> 149:156823d33999 133 case 8:
<> 149:156823d33999 134 sConfig.Channel = ADC_CHANNEL_8;
<> 149:156823d33999 135 break;
<> 149:156823d33999 136 case 9:
<> 149:156823d33999 137 sConfig.Channel = ADC_CHANNEL_9;
<> 149:156823d33999 138 break;
<> 149:156823d33999 139 case 10:
<> 149:156823d33999 140 sConfig.Channel = ADC_CHANNEL_10;
<> 149:156823d33999 141 break;
<> 149:156823d33999 142 case 11:
<> 149:156823d33999 143 sConfig.Channel = ADC_CHANNEL_11;
<> 149:156823d33999 144 break;
<> 149:156823d33999 145 case 12:
<> 149:156823d33999 146 sConfig.Channel = ADC_CHANNEL_12;
<> 149:156823d33999 147 break;
<> 149:156823d33999 148 case 13:
<> 149:156823d33999 149 sConfig.Channel = ADC_CHANNEL_13;
<> 149:156823d33999 150 break;
<> 149:156823d33999 151 case 14:
<> 149:156823d33999 152 sConfig.Channel = ADC_CHANNEL_14;
<> 149:156823d33999 153 break;
<> 149:156823d33999 154 case 15:
<> 149:156823d33999 155 sConfig.Channel = ADC_CHANNEL_15;
<> 149:156823d33999 156 break;
<> 149:156823d33999 157 case 16:
<> 149:156823d33999 158 sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
<> 149:156823d33999 159 break;
<> 149:156823d33999 160 case 17:
<> 149:156823d33999 161 sConfig.Channel = ADC_CHANNEL_VREFINT;
<> 149:156823d33999 162 break;
<> 149:156823d33999 163 default:
<> 149:156823d33999 164 return 0;
<> 149:156823d33999 165 }
<> 149:156823d33999 166
AnnaBridge 171:89b338f31ef1 167 HAL_ADC_ConfigChannel(&obj->handle, &sConfig);
<> 149:156823d33999 168
AnnaBridge 171:89b338f31ef1 169 HAL_ADC_Start(&obj->handle); // Start conversion
<> 149:156823d33999 170
<> 149:156823d33999 171 // Wait end of conversion and get value
AnnaBridge 171:89b338f31ef1 172 if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
AnnaBridge 171:89b338f31ef1 173 return (HAL_ADC_GetValue(&obj->handle));
<> 149:156823d33999 174 } else {
<> 149:156823d33999 175 return 0;
<> 149:156823d33999 176 }
<> 149:156823d33999 177 }
<> 149:156823d33999 178
<> 149:156823d33999 179 uint16_t analogin_read_u16(analogin_t *obj)
<> 149:156823d33999 180 {
<> 149:156823d33999 181 uint16_t value = adc_read(obj);
<> 149:156823d33999 182 // 12-bit to 16-bit conversion
<> 149:156823d33999 183 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
<> 149:156823d33999 184 return value;
<> 149:156823d33999 185 }
<> 149:156823d33999 186
<> 149:156823d33999 187 float analogin_read(analogin_t *obj)
<> 149:156823d33999 188 {
<> 149:156823d33999 189 uint16_t value = adc_read(obj);
<> 149:156823d33999 190 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
<> 149:156823d33999 191 }
<> 149:156823d33999 192
<> 149:156823d33999 193 #endif