From: Keith Packard <keithp@keithp.com>
Date: Sat, 5 Nov 2022 22:18:27 +0000 (-0700)
Subject: snekboard: Add samd21 SPI test function
X-Git-Tag: 1.9.13~1^2~26^2~52
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=fdc1facebf1d2818394b155a91b68e06db198728

snekboard: Add samd21 SPI test function

Just sends 'hello'

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/snekboard/Makefile b/src/snekboard/Makefile
index aacd132b..53a37c68 100644
--- a/src/snekboard/Makefile
+++ b/src/snekboard/Makefile
@@ -28,7 +28,8 @@ ALTOS_SRC = \
 	ao_panic.c \
 	ao_timer.c \
 	ao_mutex.c \
-	ao_usb_samd21.c
+	ao_usb_samd21.c \
+	ao_spi_samd21.c
 
 PRODUCT=SnekBoard
 PRODUCT_DEF=-DSNEKBOARD
diff --git a/src/snekboard/ao_pins.h b/src/snekboard/ao_pins.h
index 01cfed65..80b2cb77 100644
--- a/src/snekboard/ao_pins.h
+++ b/src/snekboard/ao_pins.h
@@ -42,6 +42,6 @@
 #define AO_APBA_PRESCALER	1
 
 #define HAS_SPI_0		1
-#define SPI_0_PA08_PA09_PA10_PA11	1
+#define SPI_0_PA08_PA09_PA10	1
 
 #endif /* _AO_PINS_H_ */
diff --git a/src/snekboard/snekboard.c b/src/snekboard/snekboard.c
index 19f5975c..09581aff 100644
--- a/src/snekboard/snekboard.c
+++ b/src/snekboard/snekboard.c
@@ -15,13 +15,34 @@
 #include <ao.h>
 #include <ao_led.h>
 
+#define SNEK_CS_PORT	(&samd21_port_a)
+#define SNEK_CS_PIN	(11)
+#define SNEK_SPI_INDEX	AO_SPI_0_PA08_PA09_PA10
+#define SNEK_SPI_SPEED	ao_spi_speed(1000000)
+
+static void
+ao_spi_test(void)
+{
+	ao_spi_get_bit(SNEK_CS_PORT, SNEK_CS_PIN, SNEK_SPI_INDEX, SNEK_SPI_SPEED);
+	ao_spi_send("hello", 5, SNEK_SPI_INDEX);
+	ao_spi_put_bit(SNEK_CS_PORT, SNEK_CS_PIN, SNEK_SPI_INDEX);
+}
+
+const struct ao_cmds ao_spi_cmds[] = {
+	{ ao_spi_test,	"s \0Send some bytes over spi" },
+	{ 0, NULL },
+};
+
 int main(void)
 {
 	ao_led_init();
 	ao_clock_init();
 	ao_task_init();
 	ao_timer_init();
+	ao_spi_init();
 	ao_usb_init();
+	ao_cmd_register(ao_spi_cmds);
+	ao_spi_init_cs(&samd21_port_a, 1 << 11); /* analog 8 for CS */
 	ao_cmd_init();
 	ao_start_scheduler();
 	return 0;