5 files changed, 182 insertions, 0 deletions
diff --git a/drivers/audio/gadc/driver.mk b/drivers/audio/gadc/driver.mk
new file mode 100644
index 00000000..b991ede8
--- /dev/null
+++ b/drivers/audio/gadc/driver.mk
@@ -0,0 +1,5 @@
+# List the required driver.
+GFXSRC += $(GFXLIB)/drivers/gaudin/gadc/gaudin_lld.c
+
+# Required include directories
+GFXINC += $(GFXLIB)/drivers/audio/gadc
diff --git a/drivers/audio/gadc/gaudin_lld.c b/drivers/audio/gadc/gaudin_lld.c
new file mode 100644
index 00000000..002d9e9b
--- /dev/null
+++ b/drivers/audio/gadc/gaudin_lld.c
@@ -0,0 +1,62 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    drivers/gaudin/gadc/gaudin_lld.c
+ * @brief   GAUDIN - Driver file for using the cpu ADC (via GADC).
+ *
+ * @addtogroup GAUDIN
+ *
+ * @{
+ */
+
+/**
+ * We are now implementing the driver - pull in our channel table
+ * from the board definitions.
+ */
+#define GAUDIN_LLD_IMPLEMENTATION
+
+
+#include "gfx.h"
+
+#if GFX_USE_GAUDIN
+
+/* Double check the GADC system is turned on */
+#if !GFX_USE_GADC
+	#error "GAUDIN - The GADC driver for GAUDIN requires GFX_USE_GADC to be TRUE"
+#endif
+
+/* Include the driver defines */
+#include "src/gaudin/driver.h"
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+void gaudin_lld_init(const gaudin_params *paud) {
+	/* Setup the high speed GADC */
+	gadcHighSpeedInit(gaudin_lld_physdevs[paud->channel], paud->frequency, paud->buffer, paud->bufcount, paud->samplesPerEvent);
+
+	/* Register ourselves for ISR callbacks */
+	gadcHighSpeedSetISRCallback(GAUDIN_ISR_CompleteI);
+
+	/**
+	 * The gadc driver handles any errors for us by restarting the transaction so there is
+	 * no need for us to setup anything for GAUDIN_ISR_ErrorI()
+	 */
+}
+
+void gaudin_lld_start(void) {
+	gadcHighSpeedStart();
+}
+
+void gaudin_lld_stop(void) {
+	gadcHighSpeedStop();
+}
+
+#endif /* GFX_USE_GAUDIN */
+/** @} */
diff --git a/drivers/audio/gadc/gaudin_lld_board_template.h b/drivers/audio/gadc/gaudin_lld_board_template.h
new file mode 100644
index 00000000..89cc0c12
--- /dev/null
+++ b/drivers/audio/gadc/gaudin_lld_board_template.h
@@ -0,0 +1,50 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    drivers/gaudin/gadc/gaudin_lld_board_template.h
+ * @brief   GAUDIN Driver board config board file
+ *
+ * @addtogroup GAUDIN
+ * @{
+ */
+
+#ifndef _GAUDIN_LLD_BOARD_H
+#define _GAUDIN_LLD_BOARD_H
+
+/*===========================================================================*/
+/* Audio inputs on this board                                                */
+/*===========================================================================*/
+
+/**
+ * @brief	The number of audio channels supported by this driver
+ * @note	This is an example
+ */
+#define GAUDIN_NUM_CHANNELS					1
+
+/**
+ * @brief	The list of audio channels and their uses
+ * @note	This is an example
+ * @{
+ */
+#define	GAUDIN_MICROPHONE					0
+/** @} */
+
+/**
+ * @brief	The audio channel to GADC physical device assignment
+ * @note	This is an example
+ * @{
+ */
+#ifdef GAUDIN_LLD_IMPLEMENTATION
+	static uint32_t gaudin_lld_physdevs[GAUDIN_NUM_CHANNELS] = {
+			GADC_PHYSDEV_MICROPHONE,
+			};
+#endif
+/** @} */
+
+#endif	/* _GAUDIN_LLD_BOARD_H */
+/** @} */
diff --git a/drivers/audio/gadc/gaudin_lld_config.h b/drivers/audio/gadc/gaudin_lld_config.h
new file mode 100644
index 00000000..a9fd02ae
--- /dev/null
+++ b/drivers/audio/gadc/gaudin_lld_config.h
@@ -0,0 +1,59 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    drivers/gaudin/gadc/gaudin_lld_config.h
+ * @brief   GAUDIN Driver config file.
+ *
+ * @addtogroup GAUDIN
+ * @{
+ */
+
+#ifndef GAUDIN_LLD_CONFIG_H
+#define GAUDIN_LLD_CONFIG_H
+
+#if GFX_USE_GAUDIN
+
+/*===========================================================================*/
+/* Driver hardware support.                                                  */
+/*===========================================================================*/
+
+/**
+ * @brief	The audio input sample type
+ * @details	For this driver it matches the cpu sample type
+ */
+typedef adcsample_t		audin_sample_t;
+
+/**
+ * @brief	The maximum sample frequency supported by this audio device
+ * @details	For this driver it matches the GADC maximum high speed sample rate
+ */
+#define GAUDIN_MAX_SAMPLE_FREQUENCY			GADC_MAX_HIGH_SPEED_SAMPLERATE
+
+/**
+ * @brief	The number of bits in a sample
+ * @details	For this driver it matches the cpu sample bits
+ */
+#define GAUDIN_BITS_PER_SAMPLE				GADC_BITS_PER_SAMPLE
+
+/**
+ * @brief	The format of an audio sample
+ * @details	For this driver it matches the cpu sample format
+ */
+#define GAUDIN_SAMPLE_FORMAT				GADC_SAMPLE_FORMAT
+
+/**
+ * For the GAUDIN driver that uses GADC - all the remaining config definitions are specific
+ * to the board.
+ */
+/* Include the user supplied board definitions */
+#include "gaudin_lld_board.h"
+
+#endif	/* GFX_USE_GAUDIN */
+
+#endif	/* GAUDIN_LLD_CONFIG_H */
+/** @} */
diff --git a/drivers/audio/gadc/readme.txt b/drivers/audio/gadc/readme.txt
new file mode 100644
index 00000000..1d3877e8
--- /dev/null
+++ b/drivers/audio/gadc/readme.txt
@@ -0,0 +1,6 @@
+This driver uses the generic GADC driver to provide a GAUDIN device.
+
+It supports whatever high speed device channels that your GADC driver and board supports.
+
+For stereo, the samples are interleaved. Remember to allocate enough space for two samples per
+sample period.