Solar MPPT Power System - firmware/Core/Src/status_led.c

by TylerK

A 30 W solar battery charger with regulated 5 V and 3.3 V rails: an STM32G031 running perturb & observe MPPT and a CC/CV charge state machine, steering a TI LM5175 4-switch buck-boost through a single analog control input. Four-layer KiCad board, schematic and PCB generated from Python, with an electrothermal simulation run against the published board file.

Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

History Download

TylerK Replace discrete-analog board with MCU/IC redesign: STM32G031 P&O MPPT + CC/CV firmware, LM5175 buck-boost, INA180 curr… e48ba30 1mo ago

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

#include "status_led.h"
#include "main.h"   /* CubeMX-generated: LED1_GPIO_Port/Pin, LED2_GPIO_Port/Pin */

#define FLOAT_BLINK_PERIOD_MS   1500U

void status_led_init(void) {
    HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);
    HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_RESET);
}

void status_led_update(charge_state_t state, uint32_t now_ms) {
    switch (state) {
    case CHG_STATE_BULK:
    case CHG_STATE_ABSORPTION:
        HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_SET);
        HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_RESET);
        break;

    case CHG_STATE_FLOAT:
        HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin,
            ((now_ms % FLOAT_BLINK_PERIOD_MS) < (FLOAT_BLINK_PERIOD_MS / 2)) ? GPIO_PIN_SET : GPIO_PIN_RESET);
        HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_RESET);
        break;

    case CHG_STATE_FAULT:
        HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);
        HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_SET);
        break;
    }
}