50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
/*
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* MTG RFID Companion - Hardware pin assignments
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*
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* Do NOT change these unless explicitly instructed. SPI2_HOST (VSPI) is
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* shared by the ST7789 display and the MFRC522 RFID reader.
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*/
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#pragma once
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#include "sdkconfig.h"
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#include "hal/gpio_types.h"
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#include "driver/spi_master.h"
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/* SPI2_HOST (VSPI): dedicated to the ST7789 display.
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* On 7-pin ST7789 modules the display labels these SDA (MOSI) and
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* SCL (SCK). MISO is unused (the display never reads the bus; the RFID
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* reader lives on its own SPI3 bus). */
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#define HW_SPI_HOST (SPI2_HOST)
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#define HW_SPI_SCK_GPIO (GPIO_NUM_18) /* display SCL */
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#define HW_SPI_MOSI_GPIO (GPIO_NUM_23) /* display SDA */
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#define HW_SPI_MISO_GPIO (GPIO_NUM_NC) /* unused */
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/* MFRC522 RFID reader - OWN SPI3_HOST (HSPI) bus, separate from the display.
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* Using a independent controller avoids any bus interference between the
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* panel and the reader. */
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#define HW_RFID_SPI_HOST (SPI3_HOST)
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#define HW_RFID_SCK_GPIO (GPIO_NUM_16)
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#define HW_RFID_MOSI_GPIO (GPIO_NUM_17)
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#define HW_RFID_MISO_GPIO (GPIO_NUM_13)
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#define HW_RC522_CS_GPIO (GPIO_NUM_26)
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#define HW_RC522_RST_GPIO (GPIO_NUM_22)
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/* ST7789 display - 7-pin breakout: CS / DC / RST / SDA / SCL / GND / VCC.
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* SDA and SCL share the SPI bus above (SCL=HW_SPI_SCK, SDA=HW_SPI_MOSI).
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*
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* IMPORTANT: CS and DC are on NON-STRAPPING pins (GPIO21, GPIO19) so the
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* panel never interferes with the ESP32 boot/flash. Keeping these on
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* GPIO15/GPIO2 (strapping pins) blocks flashing while the display is
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* connected, because the panel holds the strap lines at reset. */
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#define HW_LCD_CS_GPIO (GPIO_NUM_21)
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#define HW_LCD_DC_GPIO (GPIO_NUM_19)
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#define HW_LCD_RST_GPIO (GPIO_NUM_4)
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/* EC11 rotary encoder */
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#define HW_ENC_CLK_GPIO (GPIO_NUM_32)
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#define HW_ENC_DT_GPIO (GPIO_NUM_33)
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#define HW_ENC_SW_GPIO (GPIO_NUM_25)
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/* Piezo buzzer */
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#define HW_BUZZER_GPIO (GPIO_NUM_14) |