Diff: scope_RAM.cpp

Revision:

0:e996e4a4c783

Child:

1:b6905730f836

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scope_RAM.cpp	Tue Nov 12 07:16:15 2013 +0000
@@ -0,0 +1,42 @@
+#include "mbed.h"
+#include "scope_RAM.h"
+
+RAMscope::RAMscope(
+    PinName trigger_pin,
+    PinName value_pin
+) :
+    trigger_output(trigger_pin),
+    value_output(value_pin),
+    scope_ram_timer(&RAMscope::scope_ram, osTimerPeriodic, (void *)this)
+{
+    
+}
+
+void RAMscope::scope_ram(const void *arg) {
+    RAMscope *instance = (RAMscope*)arg;
+    instance->output_to_scope();
+}
+
+void RAMscope::output_to_scope(void) {
+    int i;
+    unsigned char *p = start;
+    trigger_output = true; trigger_output = false;
+    for (i=0; i<length; i++) {
+        value_output = *p++ == WATERMARK;
+    }
+    value_output = false;
+}
+
+void RAMscope::watermark(unsigned char *st, int len) {
+    while (len--) *st++ = WATERMARK;
+}
+
+void RAMscope::scope(unsigned char *st, int len, int period) {
+    start = st;
+    length = len;
+    scope_ram_timer.start(period);
+}
+
+void RAMscope::stop() {
+    scope_ram_timer.stop();
+}