1 files changed, 75 insertions, 0 deletions
diff --git a/boards/base/Olimex-SAM7EX256-GE8/gaudio_play_board.h b/boards/base/Olimex-SAM7EX256-GE8/gaudio_play_board.h
new file mode 100644
index 00000000..bbbc48c6
--- /dev/null
+++ b/boards/base/Olimex-SAM7EX256-GE8/gaudio_play_board.h
@@ -0,0 +1,75 @@
+/*
+ * 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
+ */
+
+#ifndef GAUDIO_PLAY_BOARD_H
+#define GAUDIO_PLAY_BOARD_H
+
+/* Our timer callback */
+static void gptcallback(GPTDriver *gptp) {
+	(void) gptp;
+	gaudio_play_pwm_timer_callbackI();
+}
+
+/* PWM configuration structure. The speaker is on PWM0/PB19 ie PWM1/PIN1 in ChibiOS speak */
+static PWMConfig pwmcfg = {
+  1000000,		/* 1 MHz PWM clock frequency. Ignored as we are using PWM_MCK_DIV_n */
+  1024,			/* PWM period is 1024 cycles (10 bits). */
+  0,
+  {
+   {PWM_MCK_DIV_1 | PWM_OUTPUT_CENTER | PWM_OUTPUT_ACTIVE_HIGH | PWM_OUTPUT_PIN1 | PWM_DISABLEPULLUP_PIN1, 0},
+  },
+};
+
+/* Timer configuration structure. We use Timer 2 (TC1) */
+static GPTConfig gptcfg = {
+  8192,							// frequency
+  gptcallback,					// callback
+  GPT_CLOCK_FREQUENCY,			// clocksource
+  GPT_GATE_NONE,				// clockgate
+  GPT_TRIGGER_NONE,				// trigger
+};
+
+static uint16_t		lastvalue;
+
+static bool gaudio_play_pwm_setup(uint32_t frequency, ArrayDataFormat format) {
+	if (format == ARRAY_DATA_10BITUNSIGNED)
+		pwmcfg.period = 1024;
+	else if (format == ARRAY_DATA_8BITUNSIGNED)
+		pwmcfg.period = 256;
+	else
+		return FALSE;
+	gptcfg.frequency = frequency;
+	return TRUE;
+}
+
+static void gaudio_play_pwm_start(void) {
+	/* Start the PWM */
+	pwmStart(&PWMD1, &pwmcfg);
+	lastvalue = pwmcfg.period>>1;
+	pwmEnableChannelI(&PWMD1, 0, lastvalue);
+
+	/* Start the timer interrupt */
+	gptStart(&GPTD2, &gptcfg);
+	gptStartContinuous(&GPTD2, 0);
+}
+
+static void gaudio_play_pwm_stop(void) {
+	/* Stop the timer interrupt */
+	gptStopTimer(&GPTD2);
+
+	/* Stop the PWM */
+	pwmStop(&PWMD1);
+}
+
+static void gaudio_play_pwm_setI(uint16_t value) {
+	if (value != lastvalue) {
+		lastvalue = value;
+		pwmEnableChannelI(&PWMD1, 0, value);
+	}
+}
+
+#endif	/* GAUDIO_PLAY_BOARD_H */