Allen Wild
Lab 1 solution code for ECE 4180. Everything except the assembly and power management extra credit.
Revision 0:c09069b2addc, committed 2015-01-29
- Comitter:
- aswild
- Date:
- Thu Jan 29 05:30:52 2015 +0000
- Commit message:
- initial commit
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MCP23S17.lib Thu Jan 29 05:30:52 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/romilly/code/MCP23S17/#068b1e8909bb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Jan 29 05:30:52 2015 +0000
@@ -0,0 +1,202 @@
+// Allen Wild
+// ECE 4180, Spring 2015
+// Lab 1 solution
+
+#include "mbed.h"
+
+//#define PART1
+//#define PART2
+//#define PART3
+//#define EXCRED1
+//#define EXCRED2 // not implemented here
+//#define EXCRED3
+//#define EXCRED4 // not implemented here
+#define EXCRED5
+
+DigitalIn button1(p21);
+DigitalIn button2(p24);
+
+#ifdef PART1 //{{{
+DigitalOut led(p26);
+
+int main()
+{
+ while(1)
+ {
+ led = !button2;
+ wait_ms(50);
+ }
+}
+#endif //}}}
+
+#ifdef PART2 //{{{
+PwmOut led(p26);
+
+int main()
+{
+ float val = 0.5;
+
+ while (1)
+ {
+ if (button1)
+ {
+ val += 0.01;
+ if (val > 1)
+ val = 1;
+ }
+ if (button2)
+ {
+ val -= 0.01;
+ if (val < 0)
+ val = 0;
+ }
+ led = val;
+ wait_ms(20);
+ }
+}
+#endif //}}}
+
+#ifdef PART3 //{{{
+#include "MCP23S17.h"
+SPI spi(p11, p12, p13);
+MCP23S17 chip(spi, p14, 0x40);
+
+int main()
+{
+ chip.direction(PORT_A, 0xFF); // input
+ chip.direction(PORT_B, 0x00); // output
+ chip.configurePullUps(PORT_A, 0x01);
+
+ while (1)
+ {
+ char port_val = chip.read(PORT_A);
+ chip.write(PORT_B, ~port_val & 0x01);
+ wait_ms(50);
+ }
+}
+#endif //}}}
+
+#ifdef EXCRED1 //{{{
+// Watchdog Timer
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led(p26);
+
+void wdt_kick()
+{
+ LPC_WDT->WDFEED = 0xAA;
+ LPC_WDT->WDFEED = 0x55;
+}
+
+void wdt_setup(float s)
+{
+ // from cookbook page
+ LPC_WDT->WDCLKSEL = 0x1;
+ uint32_t clk = SystemCoreClock / 16;
+ LPC_WDT->WDTC = s * (float)clk;
+ LPC_WDT->WDMOD = 0x3;
+ wdt_kick();
+}
+
+int main()
+{
+ led1 = 0;
+ if ((LPC_WDT->WDMOD >> 2) & 1)
+ led2 = 1;
+ else
+ led2 = 0;
+
+ wdt_setup(3.0);
+
+ while (1)
+ {
+ led = !button2;
+ wait_ms(50);
+ if (!button1)
+ {
+ led1 = 1;
+ while (1); // get stuck if button1 pressed
+ }
+ wdt_kick();
+ }
+}
+#endif //}}}
+
+#ifdef EXCRED3 //{{{
+
+SPI spi(p5, p6, p7);
+DigitalOut latch(p9);
+DigitalOut nenable(p8);
+
+void shiftbrite_write(int color)
+{
+ int red = (color >> 16) & 0xFF;
+ int green = (color >> 8) & 0xFF;
+ int blue = color & 0xFF;
+ int command = (blue << 20) | (red << 10) | green;
+ spi.write(command >> 16);
+ spi.write(command & 0x0000ffff);
+ latch = 1;
+ wait(0.00001);
+ latch = 0;
+}
+
+#define N_COLORS 6
+const int colors[N_COLORS] = {0xff0000, 0xffff00, 0x00ff00, 0x00ffff, 0x0000ff, 0xff00ff};
+
+int main()
+{
+ // set up ShiftBrite
+ spi.format(16, 0);
+ spi.frequency(500000);
+ latch = 0;
+ nenable = 0;
+ shiftbrite_write(colors[0]);
+
+ int i = 1;
+ while (1)
+ {
+ if (!button2) // change color when button pressed
+ {
+ shiftbrite_write(colors[i]);
+ if (++i >= N_COLORS)
+ i = 0;
+ while (!button2); // wait until button releases
+ }
+ if (!button1)
+ {
+ nenable = !nenable; // toggle enable pin
+ while (!button1);
+ }
+ wait_ms(50);
+ }
+}
+
+#endif //}}}
+
+#ifdef EXCRED5 //{{{
+#include "MCP23S17.h"
+
+SPI spi(p11, p12, p13);
+MCP23S17 chip1(spi, p14, 0x40);
+MCP23S17 chip2(spi, p14, 0x42);
+
+int main()
+{
+ chip1.direction(PORT_A, 0xFF); // input
+ chip1.direction(PORT_B, 0x00); // output
+ chip1.configurePullUps(PORT_A, 0x01);
+ chip2.direction(PORT_A, 0xFF);
+ chip2.direction(PORT_B, 0x00);
+
+ while (1)
+ {
+ char port_val = chip1.read(PORT_A);
+ chip1.write(PORT_B, ~port_val & 0x01);
+ chip2.write(PORT_B, ~port_val & 0x01);
+ wait_ms(50);
+ }
+}
+
+#endif //}}}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Jan 29 05:30:52 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file