add uniform io interface

1 files changed, 70 insertions, 0 deletions

diff --git a/test/read-write/main.c b/test/read-write/main.c
new file mode 100644
index 0000000..0ed45da
--- /dev/null
+++ b/test/read-write/main.c
@@ -0,0 +1,70 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <avr/pgmspace.h>
+#include <avr/interrupt.h>
+#include "bug/panic.h"
+#include "bug/debug.h"
+#include "task/task.h"
+#include "task/sched.h"
+#include "task/lock.h"
+#include "task/idle.h"
+#include "time/clock.h"
+#include "io/io.h"
+#include "mcu/io/usart.h"
+#include "tshield/tshield.h"
+#define IN_LENGTH 64
+
+#define WAIT_CYCLES(cycles) for (volatile unsigned long i = 0; i < cycles; ++i) {}
+
+void writer() {
+
+  char* buffer = "hello world";
+  size_t length = 11;
+
+
+  while(1) {
+    debug_led(1, 0);
+    WAIT_CYCLES(300000);
+    debug_led(1, 1);
+    write(&usart0, buffer, length);
+  }
+}
+
+void reader() {
+  char in;
+
+  while(1) {
+    debug_led(2, 0);
+    debug_led(3, 0);
+    if (read(&usart0, &in, 1) >= 0) {
+      debug_led(2, 1);
+    } else {
+      debug_led(3, 1);
+      WAIT_CYCLES(30000);
+    }
+    
+  }
+}
+
+DECLARE_TASK(task_idle, IDLE_STACK_SIZE, idle_entry, 0);
+DECLARE_TASK(task1, DEFAULT_STACK_SIZE, writer, 1);
+DECLARE_TASK(task2, DEFAULT_STACK_SIZE, reader, 2);
+
+int main(int argc, char *argv[]) {
+  cli();
+  tshield_init();
+
+  open(&usart0);
+  ioctl(&usart0, IOCTL_SET_BAUD, 115200);
+
+  spawn_idle(&task_idle);
+  spawn(&task1);
+  spawn(&task2);
+
+  sei();
+  clock_init(10, schedule);
+  clock_start();
+  sched_init();
+  panic(); //should never reach here
+  while(1){}
+}