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@@ -0,0 +1,137 @@
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+/*
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+ YOUR LICENSE
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+ */
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+#include <string.h>
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+#include <esp_log.h>
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+#include <esp_types.h>
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+#include <esp_system.h>
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+#include <freertos/FreeRTOS.h>
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+#include <freertos/task.h>
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+#include <driver/adc.h>
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+#include "driver/rmt.h"
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+#include "monitor.h"
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+
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+/////////////////////////////////////////////////////////////////
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+//*********************** NeoPixels ***************************
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+////////////////////////////////////////////////////////////////
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+#define NUM_LEDS 1
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+#define LED_RMT_TX_CHANNEL 0
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+#define LED_RMT_TX_GPIO 22
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+
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+#define BITS_PER_LED_CMD 24
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+#define LED_BUFFER_ITEMS ((NUM_LEDS * BITS_PER_LED_CMD))
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+
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+// These values are determined by measuring pulse timing with logic analyzer and adjusting to match datasheet.
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+#define T0H 14 // 0 bit high time
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+#define T1H 52 // 1 bit high time
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+#define TL 52 // low time for either bit
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+
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+#define GREEN 0xFF0000
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+#define RED 0x00FF00
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+#define BLUE 0x0000FF
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+#define WHITE 0xFFFFFF
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+#define YELLOW 0xE0F060
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+struct led_state {
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+ uint32_t leds[NUM_LEDS];
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+};
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+
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+void ws2812_control_init(void);
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+void ws2812_write_leds(struct led_state new_state);
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+
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+///////////////////////////////////////////////////////////////////
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+
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+static const char TAG[] = "muse";
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+
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+static void (*battery_handler_chain)(float value);
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+
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+static void battery(void *data);
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+static void battery_svc(float value);
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+
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+void target_init(void) {
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+ battery_handler_chain = battery_handler_svc;
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+ battery_handler_svc = battery_svc;
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+ ESP_LOGI(TAG, "Initializing for Muse");
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+}
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+
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+static void battery_svc(float value) {
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+ ESP_LOGI(TAG, "Called for battery service with %f", value);
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+ if (battery_handler_chain) battery_handler_chain(value);
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+}
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+
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+// Battery monitoring
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+static void battery(void *data)
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+{
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+#define VGREEN 2300
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+#define VRED 2000
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+#define NM 10
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+ static int val;
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+ static int V[NM];
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+ static int I=0;
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+ int S;
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+ for(int i=0;i<NM;i++)V[i]=VGREEN;
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+ vTaskDelay(1000 / portTICK_PERIOD_MS);
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+ struct led_state new_state;
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+ ws2812_control_init();
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+// init ADC interface for battery survey
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+ adc1_config_width(ADC_WIDTH_BIT_12);
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+ adc1_config_channel_atten(ADC1_GPIO33_CHANNEL, ADC_ATTEN_DB_11);
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+ while(true)
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+ {
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+ vTaskDelay(1000 / portTICK_PERIOD_MS);
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+ V[I++] = adc1_get_raw(ADC1_GPIO33_CHANNEL);
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+ if(I >= NM)I = 0;
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+ S = 0;
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+ for(int i=0;i<NM;i++)S = S + V[i];
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+ val = S / NM;
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+ new_state.leds[0] = YELLOW;
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+ if(val > VGREEN) new_state.leds[0] = GREEN;
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+ if(val < VRED) new_state.leds[0] = RED;
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+ printf("====> %d %6x\n", val, new_state.leds[0]);
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+ ws2812_write_leds(new_state);
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+
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+ }
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+}
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+
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+// This is the buffer which the hw peripheral will access while pulsing the output pin
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+rmt_item32_t led_data_buffer[LED_BUFFER_ITEMS];
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+
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+void setup_rmt_data_buffer(struct led_state new_state);
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+
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+void ws2812_control_init(void)
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+{
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+ rmt_config_t config;
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+ config.rmt_mode = RMT_MODE_TX;
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+ config.channel = LED_RMT_TX_CHANNEL;
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+ config.gpio_num = LED_RMT_TX_GPIO;
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+ config.mem_block_num = 3;
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+ config.tx_config.loop_en = false;
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+ config.tx_config.carrier_en = false;
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+ config.tx_config.idle_output_en = true;
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+ config.tx_config.idle_level = 0;
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+ config.clk_div = 2;
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+
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+ ESP_ERROR_CHECK(rmt_config(&config));
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+ ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));
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+}
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+
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+void ws2812_write_leds(struct led_state new_state) {
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+ setup_rmt_data_buffer(new_state);
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+ ESP_ERROR_CHECK(rmt_write_items(LED_RMT_TX_CHANNEL, led_data_buffer, LED_BUFFER_ITEMS, false));
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+ ESP_ERROR_CHECK(rmt_wait_tx_done(LED_RMT_TX_CHANNEL, portMAX_DELAY));
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+}
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+
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+void setup_rmt_data_buffer(struct led_state new_state)
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+{
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+ for (uint32_t led = 0; led < NUM_LEDS; led++) {
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+ uint32_t bits_to_send = new_state.leds[led];
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+ uint32_t mask = 1 << (BITS_PER_LED_CMD - 1);
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+ for (uint32_t bit = 0; bit < BITS_PER_LED_CMD; bit++) {
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+ uint32_t bit_is_set = bits_to_send & mask;
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+ led_data_buffer[led * BITS_PER_LED_CMD + bit] = bit_is_set ?
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+ (rmt_item32_t){{{T1H, 1, TL, 0}}} :
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+ (rmt_item32_t){{{T0H, 1, TL, 0}}};
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+ mask >>= 1;
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+ }
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+ }
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+ }
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+
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Philippe G