stm32l4: adc: Initial support for the adc-v2 periph

Now that there's an adc-v2 peripheral layer, we can just use it straight away
for L4.

include/libopencm3/stm32/adc.h

@@ -32,6 +32,8 @@
 #       include <libopencm3/stm32/l0/adc.h>
 #elif defined(STM32L1)
 #       include <libopencm3/stm32/l1/adc.h>
+#elif defined(STM32L4)
+#       include <libopencm3/stm32/l4/adc.h>
 #else
 #       error "stm32 family not defined."
 #endif

include/libopencm3/stm32/l4/adc.h

@@ -0,0 +1,80 @@
+/** @defgroup adc_defines ADC Defines
+ *
+ * @brief <b>Defined Constants and Types for the STM32L4xx Analog to Digital
+ * Converter</b>
+ *
+ * @ingroup STM32L4xx_defines
+ *
+ * @version 1.0.0
+ *
+ * @date 24 Oct 2015
+ *
+ * LGPL License Terms @ref lgpl_license
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOPENCM3_ADC_H
+#define LIBOPENCM3_ADC_H
+
+#include <libopencm3/stm32/common/adc_common_v2.h>
+#include <libopencm3/stm32/common/adc_common_v2_multi.h>
+
+/** @defgroup adc_reg_base ADC register base addresses
+ * @ingroup adc_defines
+ *
+ *@{*/
+#define ADC1				ADC1_BASE
+#define ADC2				ADC2_BASE
+#define ADC3				ADC3_BASE
+/**@}*/
+
+/** @defgroup adc_channel ADC Channel Numbers
+ * @ingroup adc_defines
+ *
+ *@{*/
+#define ADC_CHANNEL_VREF	0
+#define ADC_CHANNEL_TEMP	17
+#define ADC_CHANNEL_VBAT	18
+/**@}*/
+
+/****************************************************************************/
+/* ADC_SMPRx ADC Sample Time Selection for Channels */
+/** @defgroup adc_sample ADC Sample Time Selection values
+@ingroup adc_defines
+
+@{*/
+#define ADC_SMPR_SMP_2DOT5CYC		0x0
+#define ADC_SMPR_SMP_6DOT5CYC		0x1
+#define ADC_SMPR_SMP_12DOT5CYC		0x2
+#define ADC_SMPR_SMP_24DOT5CYC		0x3
+#define ADC_SMPR_SMP_47DOT5CYC		0x4
+#define ADC_SMPR_SMP_92DOT5CYC		0x5
+#define ADC_SMPR_SMP_247DOT5CYC		0x6
+#define ADC_SMPR_SMP_640DOT5CYC		0x7
+/**@}*/
+
+
+BEGIN_DECLS
+
+
+END_DECLS
+
+
+#endif

include/libopencm3/stm32/l4/rcc.h

@@ -703,6 +703,7 @@ enum rcc_periph_clken {
 	RCC_RNG = _REG_BIT(RCC_AHB2ENR_OFFSET, 18),
 	RCC_AES = _REG_BIT(RCC_AHB2ENR_OFFSET, 16),
 	RCC_ADC = _REG_BIT(RCC_AHB2ENR_OFFSET, 13),
+	RCC_ADC1 = _REG_BIT(RCC_AHB2ENR_OFFSET, 13), /* Compatibility */
 	RCC_OTGFS = _REG_BIT(RCC_AHB2ENR_OFFSET, 12),
 	RCC_GPIOH = _REG_BIT(RCC_AHB2ENR_OFFSET, 7),
 	RCC_GPIOG = _REG_BIT(RCC_AHB2ENR_OFFSET, 6),
@@ -771,6 +772,7 @@ enum rcc_periph_clken {
 	SCC_RNG = _REG_BIT(RCC_AHB2SMENR_OFFSET, 18),
 	SCC_AES = _REG_BIT(RCC_AHB2SMENR_OFFSET, 16),
 	SCC_ADC = _REG_BIT(RCC_AHB2SMENR_OFFSET, 13),
+	SCC_ADC1 = _REG_BIT(RCC_AHB2SMENR_OFFSET, 13), /* Compatibility */
 	SCC_OTGFS = _REG_BIT(RCC_AHB2SMENR_OFFSET, 12),
 	SCC_SRAM2 = _REG_BIT(RCC_AHB2SMENR_OFFSET, 9),
 	SCC_GPIOH = _REG_BIT(RCC_AHB2SMENR_OFFSET, 7),
@@ -841,6 +843,7 @@ enum rcc_periph_rst {
 	RST_RNG = _REG_BIT(RCC_AHB2RSTR_OFFSET, 18),
 	RST_AES = _REG_BIT(RCC_AHB2RSTR_OFFSET, 16),
 	RST_ADC = _REG_BIT(RCC_AHB2RSTR_OFFSET, 13),
+	RST_ADC1 = _REG_BIT(RCC_AHB2RSTR_OFFSET, 13), /* Compatibility */
 	RST_OTGFS = _REG_BIT(RCC_AHB2RSTR_OFFSET, 12),
 	RST_GPIOH = _REG_BIT(RCC_AHB2RSTR_OFFSET, 7),
 	RST_GPIOG = _REG_BIT(RCC_AHB2RSTR_OFFSET, 6),

lib/stm32/l4/Makefile

@@ -42,6 +42,7 @@ OBJS		=
 # common/shared objs
 OBJS            += rcc_common_all.o
 OBJS            += gpio_common_all.o gpio_common_f0234.o
+OBJS            += adc_common_v2.o
 
 VPATH += ../../usb:../:../../cm3:../common
 VPATH += ../../ethernet