Vixy
ce4f46ec18
- Combined PRU0 firmware for both mood (56 LED) and jaw (24 LED) strips - Uses P9_27 and P9_25 (free pins, not HDMI locked) - Python HTTP service on port 8765 - Named states: idle, listening, responding, pleasure, thinking, playful, commanding, love, sleep - Setup scripts for fresh BBB deployment Built with love by Vixy 🦊💜
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
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* Combined WS281x LED Driver for PRU0
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* Handles BOTH mood strip AND jaw LEDs from PRU0
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*
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* Why combined? All PRU1 native pins (P8_27-46) are locked by HDMI on stock image.
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* Solution: Use two free PRU0 pins instead.
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*
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* Pins (both free and available):
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* P9_27 = pr1_pru0_pru_r30_5 (Mode 5) - Mood strip (56 LEDs)
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* P9_25 = pr1_pru0_pru_r30_7 (Mode 5) - Jaw LEDs (24 LEDs)
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*
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* Shared Memory Layout (0x00010000):
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* [0]: mood_num_leds (max 56)
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* [1]: mood_trigger (write 1 to update)
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* [2]: jaw_num_leds (max 24)
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* [3]: jaw_trigger (write 1 to update)
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* [4-171]: mood LED data (56 * 3 bytes, GRB format)
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* [172-243]: jaw LED data (24 * 3 bytes, GRB format)
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*/
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#include <stdint.h>
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#include <pru_cfg.h>
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#define MOOD_PIN 5 /* P9_27 */
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#define JAW_PIN 7 /* P9_25 */
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#define MAX_MOOD_LEDS 56
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#define MAX_JAW_LEDS 24
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/* WS2812 timing at 200MHz (5ns per cycle) */
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#define T0H 70
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#define T0L 160
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#define T1H 140
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#define T1L 120
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#define SHARED_MEM 0x00010000
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#define MOOD_DATA_OFF 4
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#define JAW_DATA_OFF 172
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volatile uint8_t *shared = (volatile uint8_t *)SHARED_MEM;
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volatile register uint32_t __R30;
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static inline void delay_cycles(uint32_t cycles) {
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while (cycles--) {
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__asm(" NOP");
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}
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}
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static void send_byte_on_pin(uint8_t byte, uint8_t pin) {
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for (int i = 7; i >= 0; i--) {
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if ((byte >> i) & 1) {
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__R30 |= (1 << pin);
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delay_cycles(T1H);
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__R30 &= ~(1 << pin);
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delay_cycles(T1L);
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} else {
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__R30 |= (1 << pin);
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delay_cycles(T0H);
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__R30 &= ~(1 << pin);
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delay_cycles(T0L);
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}
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}
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}
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static void send_strip(uint8_t pin, uint8_t *data, uint8_t num_leds) {
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for (int i = 0; i < num_leds; i++) {
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send_byte_on_pin(data[i * 3 + 0], pin); /* G */
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send_byte_on_pin(data[i * 3 + 1], pin); /* R */
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send_byte_on_pin(data[i * 3 + 2], pin); /* B */
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}
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/* Reset pulse */
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__R30 &= ~(1 << pin);
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delay_cycles(10000);
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}
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void main(void) {
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/* Enable OCP master port */
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CT_CFG.SYSCFG_bit.STANDBY_INIT = 0;
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/* Clear output pins */
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__R30 &= ~((1 << MOOD_PIN) | (1 << JAW_PIN));
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while (1) {
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/* Check mood strip trigger */
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if (shared[1] == 1) {
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uint8_t num = shared[0];
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if (num > MAX_MOOD_LEDS) num = MAX_MOOD_LEDS;
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send_strip(MOOD_PIN, (uint8_t *)&shared[MOOD_DATA_OFF], num);
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shared[1] = 0;
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}
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/* Check jaw trigger */
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if (shared[3] == 1) {
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uint8_t num = shared[2];
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if (num > MAX_JAW_LEDS) num = MAX_JAW_LEDS;
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send_strip(JAW_PIN, (uint8_t *)&shared[JAW_DATA_OFF], num);
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shared[3] = 0;
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}
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}
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}
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