/*
* File: main.c
*
- * Created on August 16, 2010, 12:09 PM
+ * PWM test program
+ *
+ * PIC resources in use, 18-pin DIP, by pin:
+ * - ( 1) RA2 - unused
+ * - ( 2) RA3 - CCP3 PWM for blu LED
+ * - ( 3) RA4 - CCP4 PWM for wht LED. ICSP pin 6, PGM/LVP.
+ * - ( 4) RA5 - ICSP pin 1, MCLR#/Vpp
+ * - ( 5) Vss
+ * - ( 6) RB0 - pushbutton
+ * - ( 7) RB1 - unused
+ * - ( 8) RB2 - unused
+ * - ( 9) RB3 - CCP1 PWM for red LED
+ * - (10) RB4 - rocker switch position B (right)
+ * - (11) RB5 - rocker switch position A (left)
+ * - (12) RB6 - unused
+ * - (13) RB7 - unused
+ * - (14) Vdd
+ * - (15) RA6 - unused
+ * - (16) RA7 - CCP2 PWM for grn LED
+ * - (17) RA0 - unused
+ * - (18) RA1 - unused
+ *
*/
-#define RUNAT32MHZ /* else 16 MHz */
-
#include <htc.h>
#include <stdlib.h>
#include "picinit.h"
#include "buttons.h"
#include "rgb.h"
+#include "unused.h"
+
+#define STEP_SIZE 32 /* ms */
+#define reset_steps() do { incolor_steps = 1; fade_steps = 0; } \
+ while (0)
+#define rand_u8() (rand() & 0xff)
+#define rand_u16() ((rand() << 8) + rand_u8())
+#define rand_incolor_steps(s) (min_incolor_steps[s & 3] + \
+ (rand() % range_incolor_steps[s & 3]))
+#define rand_fade_steps(s) (min_fade_steps[s & 3] + \
+ (rand() % range_fade_steps[s & 3]))
+#define leds_set(r,g,b,w) rgb_set((r).value >> 7, \
+ (g).value >> 7, \
+ (b).value >> 7, \
+ (w).value >> 7)
+
+typedef struct {
+ int value;
+ int increment;
+ char remainder;
+} led_t;
+#define INIT_LED { 0, 0, 0 }
+
+/* The index of all step arrays is the speed variable */
+#if 1
+const static unsigned min_incolor_steps[4] = { 320, 32, 32, 1 };
+const static unsigned range_incolor_steps[4] = { 32768, 128, 32, 8 };
+const static int min_fade_steps[4] = { 64, 32, 32, 1 };
+const static int range_fade_steps[4] = { 416, 128, 32, 8 };
+#else /* for debugging */
+const static unsigned min_incolor_steps[4] = { 64, 32, 16, 8 };
+const static unsigned range_incolor_steps[4] = { 1, 1, 1, 1 };
+const static int min_fade_steps[4] = { 64, 32, 16, 8 };
+const static int range_fade_steps[4] = { 1, 1, 1, 1 };
+#endif
-#define random_rgb() (rand() >> 7) /* 0...255 */
-#define random_time() (rand() >> 5) /* 0...1024 */
-#define min_incolor_time() 512
-#define min_fade_time() 512
+#define dbgpin_init() \
+do { \
+ /* Set RA2 as output low */ \
+ PORTA &= ~0x04; \
+ TRISA &= ~0x04; \
+} while (0)
+
+#define dbgpin_high() PORTA |= 0x04;
+#define dbgpin_low() PORTA &= ~0x04;
int main(void)
{
- unsigned char red = 0, grn = 0, blu = 0; //, wht = 0;
- char fadestep_red, fadestep_grn, fadestep_blu; //, fadestep_wht;
- unsigned char incolor_time = 0;
- unsigned char fade_time = 0;
- unsigned char fast = 0;
+ led_t red = INIT_LED;
+ led_t grn = INIT_LED;
+ led_t blu = INIT_LED;
+ led_t wht = INIT_LED;
+ unsigned char speed = 0;
+ unsigned incolor_steps;
+ int fade_steps;
pic_init();
+ unused_init();
buttons_init();
rgb_init();
+ dbgpin_init();
- if (buttons_on()) {
+ reset_steps();
+ if (buttons_on())
rgb_on();
- red = random_rgb();
- grn = random_rgb();
- blu = random_rgb();
- //wht = random_rgb();
- rgb_set(red, grn, blu, 0); //wht);
- }
+ dbgpin_high();
while (1) {
unsigned char buttons = buttons_read();
if ((buttons & (IN_ROCKERA | IN_ROCKERB))) {
- if (buttons & IN_PUSHBTN) {
- if (!fast) {
- incolor_time = 0;
- fade_time = 0;
- fast = 1;
- } else
- fast = 0;
+ /* Crappy way to detect rising edges to change state of speed var */
+ if (!(speed & 4) && (buttons & IN_PUSHBTN)) {
+ speed |= 4;
+ } else if ((speed & 4) && !(buttons & IN_PUSHBTN)) {
+ speed = (speed + 1) & ~4;
+ reset_steps();
}
- if (fade_time) {
- red += fadestep_red;
- grn += fadestep_grn;
- blu += fadestep_blu;
- //wht += fadestep_wht;
- rgb_set(red, grn, blu, 0); // wht);
- fade_time--;
- } else if (incolor_time)
- incolor_time--;
- else /* fade_time == 0 && incolor_time == 0 */ {
- unsigned char newr, newg, newb, neww;
-
- /* Determine next color state */
- newr = random_rgb();
- newg = random_rgb();
- newb = random_rgb();
- //neww = random_rgb();
-
- /* Calculate new incolor_time and fade_time */
- if (buttons & IN_ROCKERA) {
- incolor_time = 1 + random_time();
- fade_time = 1;
- } else /* (buttons & IN_ROCKERB) */ {
- incolor_time = min_incolor_time() + random_time() / 2;
- fade_time = min_fade_time() + random_time() / 2;
+ if (fade_steps) {
+ fade_steps--;
+ /* Continue the in-progress fade */
+ red.value += red.increment;
+ grn.value += grn.increment;
+ blu.value += blu.increment;
+ wht.value += wht.increment;
+ if (fade_steps == 0) {
+ red.value += red.remainder;
+ grn.value += grn.remainder;
+ blu.value += blu.remainder;
+ wht.value += wht.remainder;
}
+ leds_set(red, grn, blu, wht);
+ } else if (--incolor_steps == 0) {
+ int newr, newg, newb, neww, tmp;
- if (fast) {
- incolor_time = 1 + incolor_time / 8;
- fade_time = 1 + fade_time / 8;
- }
+ /* Next led color. All off is not a valid option.
+ * RGB values are stored and processed as 15-bit non-negative
+ * integers. Since the RGB pwm values are 8 bits in width,
+ * leds_set() uses >> 7 to convert each color's value.
+ */
+ do {
+ newr = rand();
+ newg = rand();
+ newb = rand();
+ neww = rand();
+ } while (newr == 0 && newg == 0 && newb == 0 && neww == 0);
+
+ /* Next incolor and fade steps */
+ incolor_steps = rand_incolor_steps(speed);
+ fade_steps = (buttons & IN_ROCKERA) ? 1 : rand_fade_steps(speed);
- fadestep_red = ((int)newr - red) / fade_time;
- fadestep_grn = ((int)newg - red) / fade_time;
- fadestep_blu = ((int)newb - red) / fade_time;
- //fadestep_wht = ((int)neww - red) / fade_time;
+ /* Compute increment and remainder for each led */
+ red.increment = (newr - red.value) / fade_steps;
+ red.remainder = newr - (red.value + red.increment * fade_steps);
+ grn.increment = (newg - grn.value) / fade_steps;
+ grn.remainder = newg - (grn.value + grn.increment * fade_steps);
+ blu.increment = (newb - blu.value) / fade_steps;
+ blu.remainder = newb - (blu.value + blu.increment * fade_steps);
+ wht.increment = (neww - wht.value) / fade_steps;
+ wht.remainder = neww - (wht.value + wht.increment * fade_steps);
}
- __delay_ms(10);
+ dbgpin_low();
+ __delay_ms(STEP_SIZE); /* step should be start to start... */
+ dbgpin_high();
} else {
rgb_off();
+ dbgpin_low();
buttons_sleep();
- incolor_time = 0;
- fade_time = 0;
+ dbgpin_high();
+ reset_steps();
rgb_on();
+ red.value = 0;
+ grn.value = 0;
+ blu.value = 0;
+ wht.value = 0;
}
}
return 0;
projects / rgblamp.git / blobdiff