From 67044cca5b463772491d0712d0ce07a8f897a476 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Mon, 9 Apr 2012 00:10:43 -0700
Subject: [PATCH] altos: Test I2C code on discovery board.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/stm-demo/Makefile  |  4 +++-
 src/stm-demo/ao_demo.c | 21 +++++++++++++++++++++
 src/stm-demo/ao_pins.h |  6 ++++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/stm-demo/Makefile b/src/stm-demo/Makefile
index 26c81a82..2f156ea4 100644
--- a/src/stm-demo/Makefile
+++ b/src/stm-demo/Makefile
@@ -8,6 +8,7 @@ include ../stm/Makefile.defs
 INC = \
 	ao.h \
 	ao_arch.h \
+	ao_arch_funcs.h \
 	ao_pins.h \
 	ao_product.h
 
@@ -30,7 +31,8 @@ ALTOS_SRC = \
 	ao_mutex.c \
 	ao_dma_stm.c \
 	ao_spi_stm.c \
-	ao_adc_stm.c
+	ao_adc_stm.c \
+	ao_i2c_stm.c
 
 PRODUCT=StmDemo-v0.0
 PRODUCT_DEF=-DSTM_DEMO
diff --git a/src/stm-demo/ao_demo.c b/src/stm-demo/ao_demo.c
index ea4dadfa..879f7f75 100644
--- a/src/stm-demo/ao_demo.c
+++ b/src/stm-demo/ao_demo.c
@@ -111,7 +111,26 @@ ao_spi_read(void) {
 	}
 }
 
+static void
+ao_i2c_write(void) {
+	unsigned char	data[] = { 0x55, 0xaa, 0xff, 0x00 };
+	int i;
 
+	for (i = 0; i < 10; i++) {
+		ao_i2c_get(0);
+		if (ao_i2c_start(0, 0x55))
+			ao_i2c_send(data, 4, 0);
+		else {
+			printf ("i2c start failed\n");
+			ao_i2c_put(0);
+			break;
+		}
+		ao_i2c_put(0);
+		printf(".");
+		flush();
+		ao_delay(100);
+	}
+}
 
 static void
 ao_temp (void)
@@ -133,6 +152,7 @@ __code struct ao_cmds ao_demo_cmds[] = {
 	{ ao_dma_test,	"D\0DMA test" },
 	{ ao_spi_write, "W\0SPI write" },
 	{ ao_spi_read, "R\0SPI read" },
+	{ ao_i2c_write, "i\0I2C write" },
 	{ ao_temp, "t\0Show temp" },
 	{ 0, NULL }
 };
@@ -149,6 +169,7 @@ main(void)
 //	ao_lcd_stm_init();
 //	ao_lcd_font_init();
 	ao_spi_init();
+	ao_i2c_init();
 
 	ao_timer_set_adc_interval(100);
 
diff --git a/src/stm-demo/ao_pins.h b/src/stm-demo/ao_pins.h
index 42f4123d..9fd1175d 100644
--- a/src/stm-demo/ao_pins.h
+++ b/src/stm-demo/ao_pins.h
@@ -138,5 +138,11 @@ struct ao_adc {
 #define AO_ADC_SQ2		AO_ADC_TEMP
 #define AO_ADC_SQ3		AO_ADC_VREF
 	
+#define HAS_I2C_1		1
+#define I2C_1_PB6_PB7		0
+#define I2C_1_PB8_PB9		1
+
+#define HAS_I2C_2		0
+#define I2C_2_PB10_PB11		0
 
 #endif /* _AO_PINS_H_ */
-- 
2.30.2