Adam Kucybala
mbed library sources
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Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/analogin_api.c
- Revision:
- 219:993c9b0acbcc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/analogin_api.c Mon Jun 02 09:45:07 2014 +0100
@@ -0,0 +1,190 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2014, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "analogin_api.h"
+
+#if DEVICE_ANALOGIN
+
+#include "wait_api.h"
+#include "cmsis.h"
+#include "pinmap.h"
+#include "error.h"
+
+static const PinMap PinMap_ADC[] = {
+ {PA_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN0
+ {PA_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN1
+ {PA_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN2
+ {PA_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN3
+ {PA_4, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN4
+ {PA_5, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN5
+ {PA_6, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN6
+ {PA_7, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN7
+ {PB_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN8
+ {PB_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN9
+ {PC_0, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN10
+ {PC_1, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN11
+ {PC_2, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN12
+ {PC_3, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN13
+ {PC_4, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN14
+ {PC_5, ADC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // ADC1_IN15
+ {NC, NC, 0}
+};
+
+ADC_HandleTypeDef AdcHandle;
+
+int adc_inited = 0;
+
+void analogin_init(analogin_t *obj, PinName pin) {
+ // Get the peripheral name from the pin and assign it to the object
+ obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
+
+ if (obj->adc == (ADCName)NC) {
+ error("ADC error: pinout mapping failed.");
+ }
+
+ // Configure GPIO
+ pinmap_pinout(pin, PinMap_ADC);
+
+ // Save pin number for the read function
+ obj->pin = pin;
+
+ // The ADC initialization is done once
+ if (adc_inited == 0) {
+ adc_inited = 1;
+
+ // Enable ADC clock
+ __ADC1_CLK_ENABLE();
+
+ // Configure ADC
+ AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
+ AdcHandle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
+ AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
+ AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
+ AdcHandle.Init.ScanConvMode = DISABLE;
+ AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
+ AdcHandle.Init.LowPowerAutoWait = DISABLE;
+ AdcHandle.Init.LowPowerAutoPowerOff = DISABLE;
+ AdcHandle.Init.ContinuousConvMode = DISABLE;
+ AdcHandle.Init.DiscontinuousConvMode = DISABLE;
+ AdcHandle.Init.ExternalTrigConv = ADC_SOFTWARE_START;
+ AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
+ AdcHandle.Init.DMAContinuousRequests = DISABLE;
+ AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
+ HAL_ADC_Init(&AdcHandle);
+
+ // Run the ADC calibration
+ HAL_ADCEx_Calibration_Start(&AdcHandle);
+ }
+}
+
+static inline uint16_t adc_read(analogin_t *obj) {
+ ADC_ChannelConfTypeDef sConfig;
+
+ AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
+
+ // Configure ADC channel
+ sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
+ sConfig.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
+
+ switch (obj->pin) {
+ case PA_0:
+ sConfig.Channel = ADC_CHANNEL_0;
+ break;
+ case PA_1:
+ sConfig.Channel = ADC_CHANNEL_1;
+ break;
+ case PA_2:
+ sConfig.Channel = ADC_CHANNEL_2;
+ break;
+ case PA_3:
+ sConfig.Channel = ADC_CHANNEL_3;
+ break;
+ case PA_4:
+ sConfig.Channel = ADC_CHANNEL_4;
+ break;
+ case PA_5:
+ sConfig.Channel = ADC_CHANNEL_5;
+ break;
+ case PA_6:
+ sConfig.Channel = ADC_CHANNEL_6;
+ break;
+ case PA_7:
+ sConfig.Channel = ADC_CHANNEL_7;
+ break;
+ case PB_0:
+ sConfig.Channel = ADC_CHANNEL_8;
+ break;
+ case PB_1:
+ sConfig.Channel = ADC_CHANNEL_9;
+ break;
+ case PC_0:
+ sConfig.Channel = ADC_CHANNEL_10;
+ break;
+ case PC_1:
+ sConfig.Channel = ADC_CHANNEL_11;
+ break;
+ case PC_2:
+ sConfig.Channel = ADC_CHANNEL_12;
+ break;
+ case PC_3:
+ sConfig.Channel = ADC_CHANNEL_13;
+ break;
+ case PC_4:
+ sConfig.Channel = ADC_CHANNEL_14;
+ break;
+ case PC_5:
+ sConfig.Channel = ADC_CHANNEL_15;
+ break;
+ default:
+ return 0;
+ }
+
+ // Clear all channels as it is not done in HAL_ADC_ConfigChannel()
+ AdcHandle.Instance->CHSELR = 0;
+
+ HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
+
+ HAL_ADC_Start(&AdcHandle); // Start conversion
+
+ // Wait end of conversion and get value
+ if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
+ return (HAL_ADC_GetValue(&AdcHandle));
+ } else {
+ return 0;
+ }
+}
+
+uint16_t analogin_read_u16(analogin_t *obj) {
+ return (adc_read(obj));
+}
+
+float analogin_read(analogin_t *obj) {
+ uint16_t value = adc_read(obj);
+ return (float)value * (1.0f / (float)0xFFF); // 12 bits range
+}
+
+#endif