From e1f7dada40559a47f4496381426f71c88cd9605b Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Tue, 15 Jul 2014 18:36:40 +0200
Subject: Almost complete wm8523 api. Initial experiments with I2S.

---
 firmware/src/p2m.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 83 insertions(+), 10 deletions(-)

(limited to 'firmware/src/p2m.c')

diff --git a/firmware/src/p2m.c b/firmware/src/p2m.c
index d44a01c..aa5250d 100644
--- a/firmware/src/p2m.c
+++ b/firmware/src/p2m.c
@@ -9,8 +9,8 @@
 //#define IRQ_BLINKY
 //#define BLINKY
 //#define BLINKY
-//#define WM8523
-#define SPI
+#define WM8523
+//#define SPI
 
 #ifdef DMA
 
@@ -136,7 +136,8 @@ int main (void)
 
 #ifdef WM8523
 
-#include <cli.h>
+#include <ssp.h>
+#include <GPIO.h>
 #include <wm8523.h>
 #include <led.h>
 
@@ -147,20 +148,92 @@ int main (void)
 
 	LED_Init();
 
-	_delay(1 << 22);
+	uint8_t portnum = 0;
+
+	wm8523_init(portnum, WM8523_FS_44K1);
+
+ 	if(wm8523_get_chip_id(portnum) != WM8532_CHIP_ID) goto fail;
 
-	WM8523_init();
+	wm8523_reset_registers(portnum);
 
-	_delay(1 << 22);
+	wm8523_power_mode_t pwr =	WM8523_PWR_POWER_UP_TO_UNMUTE;
+	wm8523_set_power_mode(portnum, pwr);
 
-	WM8523_configure();
+  wm8523_aif_ctrl1_t ctl1;
+  ctl1.fmt = WM8523_FMT_I2S;
+	ctl1.wlen = WM8523_WLEN_32;
+	ctl1.invctl = WM8523_INVCTL_SLAVE_RISING;
+	ctl1.lrclkinvctl = WM8523_LRCLKINVCTL_SLAVE_NORMAL;
+	ctl1.modesel = WM8523_MODESEL_SLAVE;
+	ctl1.deemp = WM8523_DEEMPH_ENABLED;
+	wm8523_set_aif_ctrl1(portnum, ctl1);
+
+	wm8523_aif_ctrl2_t ctl2;
+  ctl2.clkratio = WM8523_CLKRATIO_AUTO;
+  ctl2.clkdiv = WM8523_CLKDIV_MCLK_4;
+  ctl2.mix = WM8523_MIX_STEREO;
+	wm8523_set_aif_ctrl2(portnum, ctl2);
+
+	wm8523_dac_ctrl3_t ctl3;
+  ctl3.downramp = WM8523_VOL_DOWN_INSTANT;
+  ctl3.upramp = WM8523_VOL_UP_INSTANT;
+  ctl3.lmute = WM8523_DACL_UNMUTE;
+  ctl3.rmute = WM8523_DACR_UNMUTE;
+  ctl3.dac_zc = WM8523_ZERO_CROSSING_DISABLED;
+	wm8523_set_dac_ctrl3(portnum, ctl3);
+
+	/*
+	// Init SPI
+	GPIOSetDir(0, 16, 1);
+	GPIOSetValue(0, 16, 1);
+
+	SSP0Init();
+
+	uint8_t src_addr[16]; //16 byte Write buffer
+	uint8_t portnum = 0;
+
+	// Set bitwidth to 16
+	// Set interface format to I2S
+	GPIOSetValue(0, 16, 0);
+	src_addr[0] = 0x0 << 7 | 0x3; // write bit (0) | register 3
+	src_addr[1] = 
+		0x2 << 0 | // Set I2S mode
+		0x0 << 2 | // Reserved
+		0x0 << 3; // Set 16 bit
+	// The rest are 0 as default which is correct
+		
+	SSPSend(portnum, (uint8_t *)src_addr, 2);
+	GPIOSetValue(0, 16, 1);
+
+	_delay(1 << 5);
+
+	// Power up and unmute
+	GPIOSetValue(0, 16, 0);
+	src_addr[0] = 0x0 << 7 | 0x2; // write bit (0) | register 2 (power register)
+	src_addr[1] = 0x2; // Set power mode: "power up and unmute"
+	SSPSend(portnum, (uint8_t *)src_addr, 2);
+	GPIOSetValue(0, 16, 1);
+	*/
+
+
+	//wm8523_init();
+
+	//	WM8523_configure();
+
+	//_delay(1 << 5);
+
+	wm8523_tone();
 
 	// Indicate that we didn't crash before the end...
-	int i = 0;
-	while(1) {
+	while(1) { // slow blink
 		LED_toggle();
 		_delay(1 << 21);
-		i = 1 - i;
+	}
+
+fail:
+	while(1) {  // fast blink
+		LED_toggle();
+		_delay(1 << 17);
 	}
 }
 
-- 
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