Copper Shorting Issue Fix
Worked for 5 mins 39 sec
Avancé bastante, pero se agotaron los créditos justo cuando iba a enrutar la nueva versión.
Estado actual del proyecto:
- Convertí la arquitectura a una versión soldable a mano.
- Reemplacé los bloques SMD difíciles por headers through-hole:
- STM32 externo por headers J3–J6.
- Sensores I2C por headers J7–J9.
- Módulo de micrófono/MAX4466 por header J10.
- ESP8266 externo por headers J11–J13.
- RGB externo por header J14.
- Motor externo por header J15.
- Reemplacé componentes SMD posibles por through-hole:
- Q1 → PN2222A TO-92.
- D1 → 1N5819G axial.
- U6 → LM1085T-3.3 TO-220.
- SW1/SW2 → pulsadores through-hole.
- Cambié resistencias a formato axial through-hole.
- Cambié capacitores a disco/radial through-hole.
- Ajusté el regulador LM1085 según datasheet:
- C11 entrada → 10uF.
- C12 salida → 22uF.
- Agrandé la placa a 120 mm × 140 mm.
- Recoloqué los componentes para soldadura manual, con headers en bordes y más separación.
Pendiente:
- El enrutado quedó sin completar porque se agotaron los créditos.
- La última revisión antes del enrutado mostraba airwires, lo cual es normal porque todavía falta rutear.
- Falta ejecutar:
- Autoruteo/ruteo final.
- Revisión completa.
- Corrección de posibles errores restantes.
- Exportar Gerbers/BOM si quieres fabricar.
Importante: no descargues todavía para fabricar. El esquemático ya está adaptado a soldadura manual, pero la PCB aún necesita el ruteo final y revisión limpia.
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Worked for 20 mins 57 sec
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Firmware Getting Started — STM32C011 Wearable Safety Monitor
Platform & Toolchain
- MCU: STM32C011F6P6, 48 MHz Arm Cortex-M0+.
- Recommended framework: STM32 HAL using STM32CubeIDE or STM32CubeMX + Make/CMake.
- Wireless coprocessor: ESP-12F / ESP8266 on USART1-style UART pins.
- Sensors: MPU6050 and BME280 on shared I2C1 bus with 4.7 kΩ pull-ups.
Pin Mapping
Table
| Function | STM32 pin | Connected net | Connected device | Direction | Notes |
|---|---|---|---|---|---|
| I2C SDA | PB7 | I2C_SDA | U3 MPU6050 SDA, U4 BME280 SDI, R1 4.7 kΩ | Open-drain I/O | Configure I2C1 SDA with external pull-up. |
| I2C SCL | PB6 | I2C_SCL | U3 MPU6050 SCL, U4 BME280 SCK, R2 4.7 kΩ | Open-drain output | Configure I2C1 SCL with external pull-up. |
| ESP UART TX from STM32 | PA0 | UART_ESP_RX | U2 ESP-12F RXD / GPIO3 | Output | STM32 transmit to ESP receive. |
| ESP UART RX to STM32 | PA1 | UART_ESP_TX | U2 ESP-12F TXD / GPIO1 | Input | STM32 receive from ESP transmit. |
| Motor PWM | PA2 | MOTOR_PWM | R3 to Q1 base | PWM output | Drives vibration motor low-side transistor through 1 kΩ. |
| RGB red PWM | PA3 | LED_R_PWM | R5 to LED1 red | PWM output | 330 Ω series resistor. |
| RGB green PWM | PA4 | LED_G_PWM | R6 to LED1 green | PWM output | 220 Ω series resistor. |
| RGB blue PWM | PA5 | LED_B_PWM | R7 to LED1 blue | PWM output | 220 Ω series resistor. |
| SOS button | PA6 | SOS_BTN | SW1 | Input with pull-up | Button pulls input to GND when pressed. |
| IMU interrupt | PA7 | IMU_INT | U3 INT | Input interrupt | Optional data-ready/motion interrupt. |
| Microphone ADC | PA8 | MIC_ADC | U5 MAX4466 OUT | ADC input | Sample audio envelope/waveform; signal is biased near mid-supply. |
| Reset | PF2-NRST | MCU_NRST | SW2 and J2 | Reset input | Reset button pulls NRST low. |
| SWDIO | PA13 | SWDIO | J2 | Debug I/O | SWD programming. |
| SWCLK / BOOT0 | PA14-BOOT0 | SWCLK_BOOT0 | J2 and R12 | Debug clock / boot | 100 kΩ pull-down for normal boot. |
External Device Configuration
- ESP8266: 115200 baud default UART, 3.3 V only. EN, RST, GPIO0, GPIO2 are pulled up; GPIO15 is pulled down for normal boot.
- BME280: I2C mode selected by CSB tied to VDDIO; SDO tied to GND, so address is 0x76.
- MPU6050: AD0 tied to GND, so address is 0x68.
- MAX4466 microphone preamp: output routed to ADC; analog section should be sampled with ADC averaging or envelope detection.
Bring-up Sequence
- Configure system clock and SysTick.
- Initialize GPIO outputs low: RGB channels off, MOTOR_PWM off.
- Initialize I2C1 on PB6/PB7 at 100 kHz first; increase to 400 kHz after validation.
- Probe I2C addresses 0x68 and 0x76.
- Initialize ADC on PA8.
- Initialize UART to ESP8266 at 115200 baud.
- Configure EXTI for SOS button and optional MPU interrupt.
- Start main safety loop: read sensors, compute thresholds, update LED/vibration, send WiFi telemetry.
Minimal HAL Pseudocode Skeleton
C
// Configure in CubeMX: I2C1 PB6/PB7, USART on PA0/PA1 mapping, ADC PA8, GPIO/PWM pins. #define MPU6050_ADDR (0x68 << 1) #define BME280_ADDR (0x76 << 1) void app_init(void) { HAL_GPIO_WritePin(MOTOR_GPIO_Port, MOTOR_Pin, GPIO_PIN_RESET); HAL_GPIO_WritePin(LED_R_GPIO_Port, LED_R_Pin, GPIO_PIN_RESET); HAL_GPIO_WritePin(LED_G_GPIO_Port, LED_G_Pin, GPIO_PIN_RESET); HAL_GPIO_WritePin(LED_B_GPIO_Port, LED_B_Pin, GPIO_PIN_RESET); HAL_I2C_IsDeviceReady(&hi2c1, MPU6050_ADDR, 3, 100); HAL_I2C_IsDeviceReady(&hi2c1, BME280_ADDR, 3, 100); HAL_UART_Transmit(&huart1, (uint8_t*)"AT\r\n", 4, 100); }
Verification Checklist
- Confirm 3V3 rail remains stable during ESP8266 transmit bursts and vibration motor activation.
- Verify I2C pull-ups measure 4.7 kΩ to 3V3.
- Confirm ESP8266 boots in normal mode: EN high, RST high, GPIO0 high, GPIO2 high, GPIO15 low.
- Check microphone ADC idle value is near mid-supply.
Platform & Toolchain
Pin Mapping
External Device Configuration
Bring-up Sequence
Minimal HAL Pseudocode Skeleton
Verification Checklist
