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board: Change M5IOE1 default address to 0x4F. #196

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Merged
lovyan03 merged 1 commit into from
May 18, 2026
+15 −5
Merged

board: Change M5IOE1 default address to 0x4F. #196

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20 changes: 15 additions & 5 deletions src/M5GFX.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,7 @@ namespace m5gfx
static constexpr std::uint32_t m5pm1_i2c_freq = 100000;
static constexpr std::uint32_t m5ioe1_i2c_freq = 100000;
static constexpr std::uint8_t m5pm1_i2c_addr = 0x6E; // M5PM1 device i2c address
static constexpr std::uint8_t m5ioe1_i2c_addr = 0x6F; // M5IOE1 device i2c address
static constexpr std::uint8_t m5ioe1_i2c_addr = 0x4F; // M5IOE1 device i2c address
static constexpr std::uint8_t pi4io1_i2c_addr = 0x43;
static constexpr std::uint8_t pi4io2_i2c_addr = 0x44;

Expand Down Expand Up @@ -1503,7 +1503,7 @@ namespace m5gfx
// Camera GC0308 check (not found == M5StackCoreS3SE)
auto chk_gc = lgfx::i2c::readRegister8(i2c_port, gc0308_i2c_addr, 0x00, i2c_freq);
if (chk_gc.has_value() && chk_gc.value() == 0x9b) {
auto chk_m5ioe1 = lgfx::i2c::readRegister8(i2c_port, 0x6F, 0x02, 100000); // Read firmware version
auto chk_m5ioe1 = lgfx::i2c::readRegister8(i2c_port, 0x6F, 0x02, 100000); // Read firmware version (NOTE: stackchan m5ioe1 i2c address is 0x6F)
if (chk_m5ioe1.has_value() && (((uint8_t)chk_m5ioe1.value()) >= 0x04)) {
board = board_M5StackChan;
ESP_LOGI(LIBRARY_NAME, "[Autodetect] board_M5StackChan");
Expand Down Expand Up @@ -1656,21 +1656,31 @@ namespace m5gfx
lgfx::pinMode(GPIO_NUM_39, lgfx::pin_mode_t::output);
lgfx::gpio_hi(GPIO_NUM_39);

// M5IOE1_REG_I2C_CFG(0x23): disable I2C sleep
lgfx::i2c::writeRegister8(i2c_port, m5ioe1_i2c_addr, 0x23, 0x00, 0, m5ioe1_i2c_freq);
// IO1: MUX_CTR
// IO3: AUDIO_EN
// IO4: TP RST
// IO5: OLED RST
// IO8: L3B_EN
lgfx::i2c::bitOff(i2c_port, m5ioe1_i2c_addr, 0x13, 0b10011101, m5ioe1_i2c_freq); // Set pin gpio1,3,4,5,8 drv: push-pull
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x03, 0b10011101, m5ioe1_i2c_freq); // Set pin gpio1,3,4,5,8 mode: output
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x05, 0b10011001, m5ioe1_i2c_freq); // Set HIGH gpio1,4,5,8
lgfx::i2c::bitOff(i2c_port, m5ioe1_i2c_addr, 0x13, 0b10011101, m5ioe1_i2c_freq); // Set pin gpio 1,3,4,5,8 drv: push-pull
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x03, 0b10011101, m5ioe1_i2c_freq); // Set pin gpio 1,3,4,5,8 mode: output
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x05, 0b10011001, m5ioe1_i2c_freq); // Set HIGH gpio 1,4,5,8
lgfx::delay(10);

// reset OLED + TP
lgfx::i2c::bitOff(i2c_port, m5ioe1_i2c_addr, 0x05, 0b00011000, m5ioe1_i2c_freq); // Set LOW gpio4,5
lgfx::delay(8);
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x05, 0b00011000, m5ioe1_i2c_freq); // Set HIGH gpio4,5,8
lgfx::delay(2);

// Audio PA: off
static constexpr uint8_t IOE1_PIN_10 = 9;
static constexpr uint8_t IOE1_BIT_10_H = (1u << (IOE1_PIN_10 - 8));
lgfx::i2c::bitOff(i2c_port, m5ioe1_i2c_addr, 0x14, IOE1_BIT_10_H, m5ioe1_i2c_freq);
lgfx::i2c::bitOn( i2c_port, m5ioe1_i2c_addr, 0x04, IOE1_BIT_10_H, m5ioe1_i2c_freq);
lgfx::i2c::bitOff(i2c_port, m5ioe1_i2c_addr, 0x06, IOE1_BIT_10_H, m5ioe1_i2c_freq); // PA off

bus_cfg.pin_mosi = GPIO_NUM_NC;
bus_cfg.pin_miso = GPIO_NUM_NC;
bus_cfg.pin_io0 = GPIO_NUM_41;
Expand Down
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