1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/gaudio/pwm/gaudio_play_pwm.c b/drivers/gaudio/pwm/gaudio_play_pwm.c
new file mode 100644
index 00000000..91d7a835
--- /dev/null
+++ b/drivers/gaudio/pwm/gaudio_play_pwm.c
@@ -0,0 +1,117 @@
+/*
+ * 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
+ */
+
+#include "gfx.h"
+
+#if GFX_USE_GAUDIO && GAUDIO_NEED_PLAY
+
+/* Include the driver defines */
+#include "../../../src/gaudio/gaudio_driver_play.h"
+
+/* Forward definition */
+static void gaudio_play_pwm_timer_callbackI(void);
+
+/* Include the board interface */
+#include "gaudio_play_board.h"
+
+static GDataBuffer		*pplay;
+static ArrayDataFormat	playfmt;
+static size_t			playlen;
+static uint8_t			*pdata;
+
+static void gaudio_play_pwm_timer_callbackI(void) {
+	if (pplay) {
+
+		// Get the next value from the current data buffer
+		if (gfxSampleFormatBits(playfmt) > 8) {
+			gaudio_play_pwm_setI(*(uint16_t *)pdata);
+			pdata += 2;
+		} else {
+			gaudio_play_pwm_setI(*pdata);
+			pdata++;
+		}
+
+		// Are we done yet
+		if (--playlen)
+			return;
+		gaudioPlayReleaseDataBlockI(pplay);
+
+		// Get a new data buffer
+		if (!(pplay = gaudioPlayGetDataBlockI())) {
+			// All is done
+			gaudioPlayDoneI();
+			return;
+		}
+
+	} else {
+		// Get a new data buffer
+		if (!(pplay = gaudioPlayGetDataBlockI()))
+			return;
+	}
+
+	// Set up ready for the new buffer
+	playlen = pplay->len;
+	if (gfxSampleFormatBits(playfmt) > 8)
+		playlen >>= 1;
+	pdata = (uint8_t *)(pplay+1);
+}
+
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+bool_t gaudio_play_lld_init(uint16_t channel, uint32_t frequency, ArrayDataFormat format) {
+	(void) channel;
+
+	if (format != ARRAY_DATA_8BITUNSIGNED && format != ARRAY_DATA_10BITUNSIGNED)
+		return FALSE;
+
+	playfmt = format;
+	return gaudio_play_pwm_setup(frequency, format);
+}
+
+bool_t gaudio_play_lld_set_volume(uint8_t vol) {
+	(void) vol;
+	return FALSE;
+}
+
+void gaudio_play_lld_start(void) {
+
+	gfxSystemLock();
+	// Get a new data buffer
+	if (pplay || !(pplay = gaudioPlayGetDataBlockI())) {
+		gfxSystemUnlock();			// Nothing to do
+		return;
+	}
+
+	// Set up ready for the new buffer
+	playlen = pplay->len;
+	if (gfxSampleFormatBits(playfmt) > 8)
+		playlen >>= 1;
+	pdata = (uint8_t *)(pplay+1);
+	gfxSystemUnlock();
+
+	// Start the playing
+	gaudio_play_pwm_start();
+}
+
+void gaudio_play_lld_stop(void) {
+	// Stop everything
+	gaudio_play_pwm_stop();
+
+	// We may need to clean up the remaining buffer.
+	gfxSystemLock();
+	if (pplay) {
+		gaudioPlayReleaseDataBlockI(pplay);
+		pplay = 0;
+		gaudioPlayDoneI();
+	}
+	gfxSystemUnlock();
+}
+
+#endif /* GFX_USE_GAUDIO && GAUDIO_NEED_PLAY */