start experimenting with processor grids

1 files changed, 28 insertions, 0 deletions

diff --git a/src/components/uart/simple_uart.c b/src/components/uart/simple_uart.c
new file mode 100644
index 0000000..5c97ccd
--- /dev/null
+++ b/src/components/uart/simple_uart.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <gran/uart/simple_uart.h>
+
+struct simple_uart {
+	struct component component;
+};
+
+static stat simple_uart_write(struct simple_uart *uart, struct packet *pkt)
+{
+	(void)uart;
+	size_t size = packet_size(pkt);
+	if (size != 1)
+		return EBUS;
+
+	putchar(*(uint8_t *)packet_data(pkt));
+	packet_set_state(pkt, PACKET_DONE);
+	return OK;
+}
+
+struct component *create_simple_uart()
+{
+	struct simple_uart *uart = calloc(1, sizeof(struct simple_uart));
+	if (!uart)
+		return NULL;
+
+	uart->component.write = (write_callback)simple_uart_write;
+	return (struct component *)uart;
+}