Yoshihiro TSUBOI
A simple sample to try to control stepper with Allegro A4988 stepper driver
Revision 0:b9c1a7c906f5, committed 2014-03-22
- Comitter:
- ytsuboi
- Date:
- Sat Mar 22 15:41:45 2014 +0000
- Commit message:
- first commit
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 |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Mar 22 15:41:45 2014 +0000
@@ -0,0 +1,47 @@
+// simple A4988 sample
+// jumper reset and sleep together
+// connect VDD to mbed VOUT
+// connect GND to mbed GND
+// connect 1A and 1B to stepper coil 1 (GREEN and BLACK wire)
+// connect 2A and 2B to stepper coil 2 (BLUE and RED wire)
+// connect VMOT to power source (to AC adapter)
+// connect GRD to power source (to AC adapter)
+// connect STEP to mbed p22
+// connect DIR to mbed p21
+
+#include "mbed.h"
+
+DigitalOut A4988STEP(p22);
+DigitalOut A4988DIR(p21);
+int a=0;
+
+int main() {
+ A4988DIR = 0;
+ A4988STEP = 0;
+
+ while(1) {
+ if (a < 200) //sweep 200 step in dir 1
+ {
+ a++;
+ A4988STEP = 1;
+ wait(0.008);
+ A4988STEP = 0;
+ wait(0.008);
+ }
+ else
+ {
+ A4988DIR = 1;
+ a++;
+ A4988STEP = 1;
+ wait(0.008);
+ A4988STEP = 0;
+ wait(0.008);
+
+ if (a>400) //sweep 200 in dir 2
+ {
+ a = 0;
+ A4988DIR = 0;
+ }
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Mar 22 15:41:45 2014 +0000 @@ -0,0 +1,1 @@ +http://world3.dev.mbed.org/users/mbed_official/code/mbed/builds/824293ae5e43 \ No newline at end of file