forked from philippe44/squeezelite-esp32
/
muse.c
131 lines (103 loc) · 3.79 KB
/
muse.c
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/*
YOUR LICENSE
*/
#include <string.h>
#include <esp_log.h>
#include <esp_types.h>
#include <esp_system.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include "driver/rmt.h"
#include "monitor.h"
#include "targets.h"
/////////////////////////////////////////////////////////////////
//*********************** NeoPixels ***************************
////////////////////////////////////////////////////////////////
#define NUM_LEDS 1
#define LED_RMT_TX_CHANNEL 0
#define LED_RMT_TX_GPIO 22
#define BITS_PER_LED_CMD 24
#define LED_BUFFER_ITEMS ((NUM_LEDS * BITS_PER_LED_CMD))
// These values are determined by measuring pulse timing with logic analyzer and adjusting to match datasheet.
#define T0H 14 // 0 bit high time
#define T1H 52 // 1 bit high time
#define TL 52 // low time for either bit
// sets a color based on RGB from 0..255 and a brightness in % from 0..100
#define RGB(R,G,B,BR) (((G*BR)/100) << 16) | (((R*BR)/100) << 8) | ((B*BR)/100)
#define RED RGB(255,0,0,10)
#define GREEN RGB(0,255,0,10)
#define BLUE RGB(0,0,255,10)
#define WHITE RGB(255,255,255,10)
#define YELLOW RGB(255,118,13,10)
struct led_state {
uint32_t leds[NUM_LEDS];
};
void ws2812_control_init(void);
void ws2812_write_leds(struct led_state new_state);
///////////////////////////////////////////////////////////////////
static const char TAG[] = "muse";
static void (*battery_handler_chain)(float value);
static void battery_svc(float value);
static bool init(void);
static void set_battery_led(float value);
const struct target_s target_muse = { .model = "muse", .init = init };
static bool init(void) {
battery_handler_chain = battery_handler_svc;
battery_handler_svc = battery_svc;
ws2812_control_init();
float value = battery_value_svc();
set_battery_led(value);
ESP_LOGI(TAG, "Initializing for Muse %f", value);
return true;
}
#define VGREEN 4.0
#define VRED 3.6
static void set_battery_led(float value) {
struct led_state new_state;
if (value > VGREEN) new_state.leds[0] = GREEN;
else if (value < VRED) new_state.leds[0] = RED;
else new_state.leds[0] = YELLOW;
ws2812_write_leds(new_state);
}
static void battery_svc(float value) {
set_battery_led(value);
ESP_LOGI(TAG, "Called for battery service with %f", value);
if (battery_handler_chain) battery_handler_chain(value);
}
// This is the buffer which the hw peripheral will access while pulsing the output pin
rmt_item32_t led_data_buffer[LED_BUFFER_ITEMS];
void setup_rmt_data_buffer(struct led_state new_state);
void ws2812_control_init(void)
{
rmt_config_t config;
config.rmt_mode = RMT_MODE_TX;
config.channel = LED_RMT_TX_CHANNEL;
config.gpio_num = LED_RMT_TX_GPIO;
config.mem_block_num = 3;
config.tx_config.loop_en = false;
config.tx_config.carrier_en = false;
config.tx_config.idle_output_en = true;
config.tx_config.idle_level = 0;
config.clk_div = 2;
ESP_ERROR_CHECK(rmt_config(&config));
ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));
}
void ws2812_write_leds(struct led_state new_state) {
setup_rmt_data_buffer(new_state);
ESP_ERROR_CHECK(rmt_write_items(LED_RMT_TX_CHANNEL, led_data_buffer, LED_BUFFER_ITEMS, false));
ESP_ERROR_CHECK(rmt_wait_tx_done(LED_RMT_TX_CHANNEL, portMAX_DELAY));
}
void setup_rmt_data_buffer(struct led_state new_state)
{
for (uint32_t led = 0; led < NUM_LEDS; led++) {
uint32_t bits_to_send = new_state.leds[led];
uint32_t mask = 1 << (BITS_PER_LED_CMD - 1);
for (uint32_t bit = 0; bit < BITS_PER_LED_CMD; bit++) {
uint32_t bit_is_set = bits_to_send & mask;
led_data_buffer[led * BITS_PER_LED_CMD + bit] = bit_is_set ?
(rmt_item32_t){{{T1H, 1, TL, 0}}} :
(rmt_item32_t){{{T0H, 1, TL, 0}}};
mask >>= 1;
}
}
}