*
* 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
- *
+ * PIC resources in use, 28-pin DIP, by pin:
+ * - ( 1) RE3 - Vpp/MCLR#
+ * - ( 2) RA0 - unused
+ * - ( 3) RA1 - unused
+ * - ( 4) RA2 - unused
+ * - ( 5) RA3 - unused
+ * - ( 6) RA4 - unused (could become PGM/LVP, but apparently not needed)
+ * - ( 7) RA5 - unused
+ * - ( 8) Vss
+ * - ( 9) RA7 - unused
+ * - (10) RA6 - unused
+ * - (11) RC0 - T1OSO
+ * - (12) RC1 - T1OSI
+ * - (13) RC2 - CCP1 PWM for wht LED
+ * - (14) RC3 - unused
+ * - (15) RC4 - unused
+ * - (16) RC5 - unused
+ * - (17) RC6 - unused
+ * - (18) RC7 - unused
+ * - (19) Vss
+ * - (20) Vdd
+ * - (21) RB0 - CCP4 PWM for blu LED
+ * - (22) RB1 - Pushbutton
+ * - (23) RB2 - Rocker switch, right
+ * - (24) RB3 - CCP2 PWM for grn LED
+ * - (25) RB4 - Rocker switch, left
+ * - (26) RB5 - CCP3 PWM for red LED
+ * - (27) RB6 - ICSPCLK
+ * - (28) RB7 - ICSPDAT
*/
#include <htc.h>
#include <stdlib.h>
#include "picinit.h"
#include "unused.h"
-#include "buttons.h"
+#include "btn.h"
#include "rgb.h"
-#include "timer.h"
-
-#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, \
- 0)
+#include "tmr.h"
+#include "tmr32.h"
+#include "task.h"
+#include "adc_random.h"
+
+#if 1
+#define AUTO_OFF_COUNT 1800U /* 1 hr in 2 sec units */
+#define AUTO_ON_COUNT 19800U /* 11 hrs in 2 sec units */
+#else
+#define AUTO_OFF_COUNT 9000U /* 5 hrs in 2 sec units */
+#define AUTO_ON_COUNT 34200U /* 19 hrs in 2 sec units */
+#endif
+#define leds_set(r,g,b,w) rgb_set((r).value >> 7, (g).value >> 7, \
+ (b).value >> 7, 0)
+#define dbgpin_init() do { \
+ /* Set RA2 as output low */ \
+ RA2 = 0; \
+ TRISA2 = 0; \
+ } while (0)
+#define dbgpin_high() (RA2 = 1)
+#define dbgpin_low() (RA2 = 0)
+#define dbgpin_toggle() (RA2 = (LATA2 == 0) ? 1 : 0)
typedef struct {
int value;
int increment;
- char remainder;
+ signed char remainder;
} led_t;
-#define INIT_LED { 0, 0, 0 }
-/* The index of all step arrays is the speed variable */
-#if 1
+/* The index of all step arrays is the speed variable. min values must be
+ * at least one. range values are bit-ANDed with rand() to generate a range, so
+ * ensure they are one less than a power of 2 and at least 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
+const static unsigned range_incolor_steps[4] = { 32767, 127, 31, 7 };
+const static int min_fade_steps[4] = { 64, 32, 32, 8 };
+const static int range_fade_steps[4] = { 511, 127, 31, 7 };
-#define dbgpin_init() \
-do { \
- /* Set RA2 as output low */ \
- PORTA &= ~0x04; \
- TRISA &= ~0x04; \
-} while (0)
+led_t red;
+led_t grn;
+led_t blu;
+led_t wht;
+bit on;
+unsigned char speed;
+int fade_steps;
-#define dbgpin_high() PORTA |= 0x04;
-#define dbgpin_low() PORTA &= ~0x04;
+void start_fade()
+{
+ /* RGB PWM values are 8 bits, but computations are done in 15
+ * (leaving room for a sign bit), so leds_set() uses >>7 to convert
+ * to PWM values.
+ */
+ int newr, newg, newb, neww;
-int main(void)
+ /* New RGB values; all zero is not a valid option */
+ do {
+ newr = rand();
+ newg = rand();
+ newb = rand();
+ neww = rand();
+ } while (newr == 0 && newg == 0 && newb == 0 && neww == 0);
+
+ /* Random # of steps to reach the new color */
+ fade_steps = min_fade_steps[speed & 3] +
+ (rand() & range_fade_steps[speed & 3]);
+
+ /* Compute increment per fade step, 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);
+
+ /* Start the fade timer */
+ tmr_stop(TMR_INCOLOR);
+ tmr_startPeriodic(TMR_FADE, 1); /* 32.768 msec */
+}
+
+void turnOn()
+{
+ dbgpin_high();
+ on = 1;
+ red.value = 0;
+ grn.value = 0;
+ blu.value = 0;
+ wht.value = 0;
+ leds_set(red, grn, blu, wht);
+ rgb_on();
+ start_fade();
+ btn_pben();
+}
+
+void turnOff()
+{
+ /* Event on to off, either by switch or auto-off timer */
+ tmr_stop(TMR_INCOLOR);
+ tmr_stop(TMR_FADE);
+ rgb_off();
+ dbgpin_low();
+ SLEEP();
+ on = 0;
+}
+
+void pb_task()
{
- 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();
- timer_init();
- dbgpin_init();
-
- reset_steps();
- if (buttons_on())
- rgb_on();
-
- dbgpin_high();
- while (1) {
- unsigned char buttons = buttons_read();
-
- if ((buttons & (IN_ROCKERA | IN_ROCKERB))) {
- /* 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_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;
-
- /* 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);
-
- /* 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);
- }
- dbgpin_low();
- timer_owait(); /* wait 32 ms since last return from last call() */
- dbgpin_high();
- } else {
- rgb_off();
- dbgpin_low();
- buttons_sleep();
- dbgpin_high();
- reset_steps();
- rgb_on();
- red.value = 0;
- grn.value = 0;
- blu.value = 0;
- wht.value = 0;
- }
+ /* Is this task running nearly continuously? */
+ if (on) {
+ if (btn_pb() == BTN_PB_UP) {
+ speed = (speed + 1) & 3;
+ start_fade();
}
- return 0;
+ btn_pben();
+ }
+}
+
+void rs_task()
+{
+ btn_rsen();
+ switch (btn_rs()) {
+ case BTN_RS_OFF:
+ tmr32_set(0);
+ turnOff();
+ break;
+ case BTN_RS_RIGHT:
+ tmr32_set(AUTO_OFF_COUNT);
+ /* fall through */
+ case BTN_RS_LEFT:
+ turnOn();
+ break;
+ }
+}
+
+void fade_task()
+{
+ red.value += red.increment;
+ grn.value += grn.increment;
+ blu.value += blu.increment;
+ wht.value += wht.increment;
+ if (--fade_steps == 0) {
+ /* This is the last fade step. Finalize the RGB led states and decide how
+ * long to stay in this color.
+ */
+ red.value += red.remainder;
+ grn.value += grn.remainder;
+ blu.value += blu.remainder;
+ wht.value += wht.remainder;
+ tmr_stop(TMR_FADE);
+ tmr_start(TMR_INCOLOR, min_incolor_steps[speed & 3] +
+ (rand() & range_incolor_steps[speed & 3]));
+ }
+ leds_set(red, grn, blu, wht);
}
+
+void auto_offon_task()
+{
+ if (on) {
+ turnOff();
+ if (btn_rs() == BTN_RS_RIGHT)
+ tmr32_set(AUTO_ON_COUNT);
+ } else /* off */ {
+ turnOn();
+ if (btn_rs() == BTN_RS_RIGHT)
+ tmr32_set(AUTO_OFF_COUNT);
+ }
+}
+
+void user_boot()
+{
+ dbgpin_high();
+ srand((adc_random() << 8) + adc_random());
+ rs_task();
+}
+
+void user_tasks(unsigned char block)
+{
+ task_id_t tid;
+
+ while ((tid = task_get(block)) >= 0) {
+ switch (tid) {
+ case TASK_BTN_PB: /* pushbutton state change */
+ pb_task();
+ break;
+ case TASK_BTN_RS: /* rocker switch state change */
+ rs_task();
+ break;
+ case TASK_FADE: /* fade timer has fired */
+ fade_task();
+ break;
+ case TASK_INCOLOR: /* in-color timer has fired */
+ start_fade();
+ break;
+ case TASK_TMR32: /* auto on/off event */
+ auto_offon_task();
+ break;
+ }
+ }
+}
+
+int main(void)
+{
+ /* Platform initialization */
+ pic_init();
+ unused_init();
+ btn_init();
+ rgb_init();
+ tmr_init();
+ tmr32_init();
+ task_init();
+ dbgpin_init();
+
+#if 0
+ /* Execute tasks until the queue empties */
+ user_tasks(0);
+#endif
+
+#if 0
+ /* Software initialization */
+#endif
+
+#if 0
+ /* Execute tasks until the queue empties */
+ user_tasks(0);
+#endif
+
+ /* Run user boot code */
+ user_boot();
+
+ /* Process tasks forever */
+ user_tasks(1);
+
+ /* Prevent return from main, which causes a device reset */
+ while (1);
+}
+