From f573d559a01ea322d3bfb9f618498fa0637a5f27 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sat, 22 Sep 2012 16:14:17 +0200
Subject: Enable I2C for configuring the DAC.

---
 laks     |  2 +-
 main.cpp | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/laks b/laks
index 0ca572b..eaf304f 160000
--- a/laks
+++ b/laks
@@ -1 +1 @@
-Subproject commit 0ca572bc7a0fbe26b216cab519d89187ae49a28b
+Subproject commit eaf304f02a234171c2b994138f1bc54338dcd975
diff --git a/main.cpp b/main.cpp
index 4b36241..c80a885 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,6 +5,12 @@
 #include <usb/descriptor.h>
 #include <spi/spi.h>
 #include <dma/dma.h>
+#include <i2c/i2c.h>
+
+Pin& dac_nreset = PD4;
+
+Pin& i2c_scl = PB6;
+Pin& i2c_sda = PB9;
 
 Pin& i2s_mck = PC7;
 Pin& i2s_sck = PC10;
@@ -130,7 +136,7 @@ class USB_Audio : public USB_class_driver {
 		virtual void handle_set_configuration(uint8_t configuration) {
 			if(configuration) {
 				usb.register_out_handler(this, 1);
-				usb.hw_conf_ep(0x01, Isochronous, 256);
+				usb.hw_conf_ep(0x01, EPType::Isochronous, 256);
 			}
 		}
 		
@@ -166,6 +172,7 @@ int main() {
 	RCC.enable(RCC.GPIOA);
 	RCC.enable(RCC.GPIOB);
 	RCC.enable(RCC.GPIOC);
+	RCC.enable(RCC.GPIOD);
 	
 	// Initialize I2S.
 	i2s_mck.set_mode(Pin::AF);
@@ -196,6 +203,15 @@ int main() {
 	DMA1.reg.S[7].NDTR = audio_buf_size;
 	DMA1.reg.S[7].CR |= 1;
 	
+	// Initialize I2C.
+	I2C1.enable(i2c_scl, i2c_sda);
+	
+	// Configure CS43L22.
+	dac_nreset.set_mode(Pin::Output);
+	dac_nreset.on();
+	
+	I2C1.write_reg(0x4a, 0x02, 0x9e);
+	
 	// Initialize USB.
 	usb_vbus.set_mode(Pin::Input);
 	usb_dm.set_mode(Pin::AF);
-- 
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