Jasper Wallace
code to drive the main board of the london-hackspace vending machine
Revision 0:68a443d62d80, committed 2011-01-23
- Comitter:
- Jasper
- Date:
- Sun Jan 23 00:31:36 2011 +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 68a443d62d80 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Jan 23 00:31:36 2011 +0000
@@ -0,0 +1,265 @@
+#include "mbed.h"
+
+DigitalOut g(p22);
+DigitalOut r(p21);
+
+void red(void) {
+ r = 1; g = 0;
+}
+
+void green(void) {
+ r = 0; g = 1;
+}
+
+void orange(void) {
+ r = 1; g = 1;
+}
+
+void off(void) {
+ r = 0; g = 0;
+}
+
+Serial pc(USBTX, USBRX);
+
+DigitalOut ser(p25);
+DigitalOut mclock(p24);
+DigitalOut oe(p26);
+DigitalOut m10(p28);
+DigitalOut m9(p27);
+
+InterruptIn vint(p30);
+
+int intrcount = 0;
+bool vendfound = 0;
+
+/*
+motor connectors pinouts:
+
+ a b
+1 a1 b1
+2 a2 b2
+3 a3 b3
+4 a4 b4
+5 a5 b5
+6 a6 b6
+7 a7 n/a
+8 a8 n/a
+9 a9 n/a
+10 a0 n/a
+*/
+
+/* bits are:
+ *
+ * serial data mcu -> 5890 -> 5842A
+ *
+ * first bits out are for the first 8 motor sinks
+ * next 8 are the sources, we only need 2
+ *
+ * low order bits are the sinks
+ *
+ */
+uint16_t motor_bits(int motor)
+{
+ uint16_t out = 0; // 16 bits!
+
+ switch (motor) {
+ case 1:
+ out = 0x2080; // 0010000010000000
+ break;
+ case 2:
+ out = 0x2040; // 0010000001000000
+ break;
+ case 3:
+ out = 0x2020; // 0010000000100000
+ break;
+ case 4:
+ out = 0x2010; // 0010000000010000
+ break;
+ case 5:
+ out = 0x2008; // 0010000000001000
+ break;
+ case 6:
+ out = 0x2004; // 0010000000000100
+ break;
+ case 7:
+ out = 0x2002; // 0010000000000010
+ break;
+ case 8:
+ out = 0x2001; // 0010000000000001
+ break;
+ case 9:
+ out = 0x2000; // 0010000000000000 uses the darlingtons
+ break;
+ case 10:
+ out = 0x2000; // 0010000000000000 uses the darlingtons
+ break;
+ case 11:
+ out = 0x4080; // 0100000010000000
+ break;
+ case 12:
+ out = 0x4040; // 0100000001000000
+ break;
+ case 13:
+ out = 0x4020; // 0100000000100000
+ break;
+ case 14:
+ out = 0x4010; // 0100000000010000
+ break;
+ case 15:
+ out = 0x4008; // 0100000000001000
+ break;
+ case 16:
+ out = 0x4004; // 0100000000000100
+ break;
+ }
+ return out;
+}
+
+/*
+ * motor is 1 to 16
+ */
+int motors(int motor) {
+ int i, bit;
+ uint16_t bits;
+
+ bits = 0;
+
+ if (motor < 1)
+ return -1;
+
+ if (motor > 16)
+ return -1;
+
+ bits = motor_bits(motor);
+
+ for (i = 0 ; i < 16 ; i++)
+ {
+ bit = (bits & (1 << i)) >> i;
+ ser = bit;
+ mclock = 0;
+ wait_ms(1);
+ mclock = 1;
+ wait_ms(1);
+ }
+
+ // need to use the darlington pins instead
+ if (motor == 9)
+ m9 = 1;
+
+ if (motor == 10)
+ m10 = 1;
+
+ return 0;
+}
+
+void clear(void) {
+ int i;
+
+ ser = 0;
+ m9 = 0;
+ m10 = 0;
+ oe = 1; // oe is active low
+
+ for (i = 0; i < 16 ; i++)
+ {
+ mclock = 0;
+ wait_ms(1);
+ mclock = 1;
+ }
+ wait_ms(1);
+ m9 = 0;
+ m10 = 0;
+ oe = 0; // should switch everything off.
+ intrcount = 0;
+}
+
+void vendintr() {
+ intrcount++;
+}
+
+int main() {
+ int i;
+ char got;
+ char state1, gcount;
+ int ga, gb;
+
+ state1 = 'n';
+ gcount = 0;
+ ga = gb = 0;
+
+ oe = 1; // active low
+ ser = 0;
+ mclock = 0;
+
+ printf("\n\rGo!\n\r");
+ green();
+
+ vint.mode(PullUp);
+ vint.fall(&vendintr);
+
+ for (i = 0; 1 ; i++) {
+ if (i % 2) {
+ orange();
+ } else {
+ green();
+ }
+
+ wait_ms(100);
+ if (pc.readable())
+ {
+ got = pc.getc();
+ pc.putc(got); // remote echo
+ if (state1 == 'n') // no command in progress
+ {
+ if (got == 'c') // no args
+ {
+ clear();
+ printf("cleared\n\r");
+ }
+ if (got == 'r') { // no args, report intr count
+ printf("vendintrs: %d\n\r", intrcount);
+ }
+ if (got == 'm') // look for numbers
+ state1 = 'm';
+ } else if (state1 == 'm') {
+ if ((got - '0') > -1 && (got - '0') < 10 )
+ {
+ if (gcount == 0)
+ ga = got - '0';
+ if (gcount == 1)
+ gb = got - '0';
+
+ gcount += 1;
+ } else if (got == '\n' || got == '\r') {
+ // newline, so end command
+ int runmotor = 0;
+ if (gcount < 3 && gcount != 0) {
+ if (gcount == 1)
+ runmotor = ga;
+ if (gcount == 2)
+ runmotor = (ga * 10) + gb;
+ if (runmotor > 16) {
+ printf("motor too big: %d\n\r", runmotor);
+ } else {
+ printf("running motor %d\n\r", runmotor);
+ oe = 1;
+ motors(runmotor);
+ oe = 0; // active low
+ }
+ } else {
+ printf("too many digits\n\r");
+ }
+ state1 = 'n';
+ gcount = ga = gb = 0;
+ } else {
+ printf("m fail\n\r");
+ state1 = 'n';
+ gcount = ga = gb = 0;
+ }
+ }
+ }
+ }
+ clear();
+
+ printf("Done!\r\n");
+}
diff -r 000000000000 -r 68a443d62d80 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sun Jan 23 00:31:36 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e