Martin Smith
Program to allow ISP programming of custom LPC1768 ICs on custom PCBs.
Revision 0:fab931a2c13b, committed 2012-02-19
- Comitter:
- ms523
- Date:
- Sun Feb 19 10:33:26 2012 +0000
- Commit message:
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r fab931a2c13b main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Feb 19 10:33:26 2012 +0000
@@ -0,0 +1,61 @@
+#include "mbed.h"
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+
+Serial pc (USBTX,USBRX);
+Serial target (p28,p27);
+
+// We'll drive this low, and then set the as inputs
+// this mimics an open collector style ouput
+DigitalInOut reset (p29);
+DigitalInOut isp (p30);
+
+int main() {
+
+ pc.baud(19200);
+ target.baud(19200);
+
+ // ISP Input with pullup
+ isp.input();
+ isp.mode(PullUp);
+
+ // pulse reset low
+ reset.output();
+ reset = 0;
+ wait (0.01);
+
+ // reset input, with pullup
+ reset.input();
+ reset.mode(PullUp);
+
+ while (!pc.readable()) {}
+
+ // pull ISP and nReset low
+ reset.output();
+ isp.output();
+ reset = 0;
+ isp = 0;
+
+ wait (0.1);
+
+ // Bring target out of reset
+ reset.input();
+ reset.mode(PullUp);
+
+ wait (0.1);
+
+ while (1) {
+
+ if (pc.readable()) {
+ target.putc(pc.getc());
+ led1 = !led1;
+ }
+
+ if (target.readable()) {
+ pc.putc(target.getc());
+ led2 = !led2;
+ }
+
+ }
+}
diff -r 000000000000 -r fab931a2c13b mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sun Feb 19 10:33:26 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/49a220cc26e0