/*
* 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 (future crystal)
+ * - (13) RB7 - unused (future crystal)
+ * - (14) Vdd
+ * - (15) RA6 - unused
+ * - (16) RA7 - CCP2 PWM for grn LED
+ * - (17) RA0 - unused
+ * - (18) RA1 - unused
+ *
*/
-
#include <htc.h>
-//#include <pic16f1827.h>
-
-#define RUNAT32MHZ /* else 16 MHz */
-#define LEDBIT 0x01 /* Port RB0 */
-#define RED_CHAN 1
-#define GRN_CHAN 2
-#define BLU_CHAN 4
-#define WHT_CHAN 8
-#define ALL_CHAN 15
-
-#if defined(RUNAT32MHZ)
-__CONFIG(WDTE_OFF & FOSC_INTOSC);
-__CONFIG(LVP_OFF & PLLEN_ON);
+#include <stdlib.h>
+#include "picinit.h"
+#include "unused.h"
+#include "btn.h"
+#include "rgb.h"
+#include "tmr.h"
+#include "task.h"
+#include "adc_random.h"
+
+#if 0
+#define AUTO_OFF_COUNT 549316UL /* 5 hrs in 32.768 ms units */
+#define AUTO_ON_COUNT 2087402UL /* 19 hrs in 32.768 ms units */
#else
-__CONFIG(WDTE_OFF);
-__CONFIG(LVP_OFF);
+#define AUTO_OFF_COUNT 1831 /* 1 minute in 32.768 ms units */
+#define AUTO_ON_COUNT 3662 /* 2 minutes in 32.768 ms units */
#endif
+#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)
+#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)
-void pic_init()
-{
-#if defined(RUNAT32MHZ)
- OSCCON = 0b11110000;
-#else /* 16 MHz */
- OSCCON = 0b01111010;
+typedef struct {
+ int value;
+ int increment;
+ signed char remainder;
+} led_t;
+
+/* 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
- /* OSCSTAT.HFIOFL is set when oscillator is locked (accurate within 2%) */
- while (!HFIOFL);
-}
+led_t red;
+led_t grn;
+led_t blu;
+led_t wht;
+bit on;
+unsigned char speed;
+int fade_steps;
-void pwm_init()
+void start_fade()
{
- /* Initialize PWM
- * CCP1 on RB3, CCP2 on RA7, CCP3 on RA3, CCP4 on RA4
- * - Fosc = 32MHz
- * - Prescale = 16
- * - PRx value = 0xff
- * = f(pwm) = 1.95 kHz
- */
+ /* 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;
- /* Disable output on PWM Rxn pins */
- TRISA |= 0b10011000;
- TRISB |= 0b00001000;
-
- /* Configure ECCP1 */
- CCP1CON = 0b00001100;
- CCPR1L = 0; /* Initial PWM value; only using 8 LSBs */
-
- /* Configure ECCP2 */
- APFCON0 |= 0b00001000; /* Use alternate output pin RA7 */
- CCP2CON = 0b00001100;
- CCPR2L = 0; /* Initial PWM value; only using 8 LSBs */
-
- /* Configure CCP3 */
- CCP3CON = 0b00001100;
- CCPR3L = 0; /* Initial PWM value; only using 8 LSBs */
-
- /* Configure CCP4 */
- CCP4CON = 0b00001100;
- CCPR4L = 0; /* Initial PWM value; only using 8 LSBs */
-
- /* Configure Timer2 */
- CCPTMRS = 0; /* All CCPx use Timer 2 */
- TMR2IF = 0;
- PR2 = 0xff;
- T2CON = 0b00000111;
-
- /* Enable PWM outputs after Timer 2 overflows */
- while (!TMR2IF);
- TRISA &= ~0b10011000;
- TRISB &= ~0b00001000;
+ /* 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 = rand_fade_steps(speed);
+
+ /* 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 led_init()
+void turnOn()
{
- PORTB &= ~LEDBIT; /* Led is RB0 */
- TRISB &= ~LEDBIT;
+ 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 led_set(unsigned char led)
+void turnOff()
{
- if (led)
- PORTB |= LEDBIT;
- else
- PORTB &= ~LEDBIT;
+ /* Event on to off, either by switch or auto-off timer */
+ tmr_stop(TMR_INCOLOR);
+ tmr_stop(TMR_FADE);
+ rgb_off();
+ dbgpin_low();
+ on = 0;
}
-void pwm_set(unsigned char channels, unsigned char step)
+void pb_task()
{
- if (channels & RED_CHAN)
- CCPR1L = step;
- if (channels & GRN_CHAN)
- CCPR2L = step;
- if (channels & BLU_CHAN)
- CCPR3L = step;
- if (channels & WHT_CHAN)
- CCPR4L = step;
+ /* Is this task running nearly continuously? */
+ if (on) {
+ if (btn_pb() == BTN_PB_UP) {
+ speed = (speed + 1) & 3;
+ start_fade();
+ }
+ btn_pben();
+ }
}
-void delay()
+void rs_task()
{
- for (unsigned counter = 0; counter < 10000; counter++);
+ switch (btn_rs()) {
+ case BTN_RS_OFF:
+ tmr_stop(TMR_AUTO_OFFON);
+ turnOff();
+ break;
+ case BTN_RS_RIGHT:
+ tmr_start(TMR_AUTO_OFFON, AUTO_OFF_COUNT);
+ /* fall through */
+ case BTN_RS_LEFT:
+ turnOn();
+ break;
+ }
+ btn_rsen();
}
-void ramp_up(unsigned char channels)
+void fade_task()
{
- unsigned char step = 0;
-
- do {
- pwm_set(channels, step++);
- delay();
- } while (step != 0);
+ 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, rand_incolor_steps(speed));
+ }
+ leds_set(red, grn, blu, wht);
}
-void ramp_down(unsigned char channels)
+void auto_offon_task()
{
- unsigned char step = 255;
+ if (on) {
+ turnOff();
+ if (btn_rs() == BTN_RS_RIGHT)
+ tmr_start(TMR_AUTO_OFFON, AUTO_ON_COUNT);
+ } else /* off */ {
+ turnOn();
+ if (btn_rs() == BTN_RS_RIGHT)
+ tmr_start(TMR_AUTO_OFFON, AUTO_OFF_COUNT);
+ }
+}
- do {
- pwm_set(channels, step--);
- delay();
- } while (step != 255);
+void user_boot()
+{
+ dbgpin_high();
+ srand((adc_random() << 8) + adc_random());
+ rs_task();
}
-void ramp_up_down(unsigned char channels)
+void user_tasks(unsigned char block)
{
- ramp_up(channels);
- ramp_down(channels);
+ 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_AUTO_OFFON: /* auto on/off timer has fired */
+ auto_offon_task();
+ break;
+ }
+ }
}
int main(void)
{
- unsigned char fwd = 1;
- unsigned char step = 0;
-
- pic_init();
- led_init();
- pwm_init();
- while (1) {
- ramp_up(RED_CHAN);
- ramp_up(GRN_CHAN);
- ramp_down(RED_CHAN);
- ramp_up(BLU_CHAN);
- ramp_down(GRN_CHAN);
- ramp_up(RED_CHAN);
- ramp_up(GRN_CHAN + BLU_CHAN);
- ramp_down(ALL_CHAN);
- ramp_up_down(WHT_CHAN);
- }
- return 0;
+ /* Platform initialization */
+ pic_init();
+ unused_init();
+ btn_init();
+ rgb_init();
+ tmr_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);
}
+
projects / rgblamp.git / blobdiff