I2C Services: Difference between revisions
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TimmSkiller (talk | contribs) Add common errors |
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Each I2C service can only access certain I2C [[I2C_Registers|device(s)]] | Each I2C service can only access certain I2C [[I2C_Registers|device(s)]]. | ||
= I2C Service = | = I2C Service = | ||
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Command 0x00150080 is also used for reading ZL, ZR, and C-stick data by [[IR Services]]. | Command 0x00150080 is also used for reading ZL, ZR, and C-stick data by [[IR Services]]. | ||
= Common Result Values = | |||
{| class="wikitable" border="1" | |||
|- | |||
! Result code !! Description | |||
|- | |||
| 0xE0A02FEA || The current session is not permitted to access the specified device ID. | |||
|- | |||
| 0xF9602FEF || Communication error. Device may not be connected. | |||
|} | |||
Revision as of 16:47, 28 May 2026
I2C Service Names
| Service names | Accessible deviceIDs | Service used by sysmodule |
|---|---|---|
| "i2c::MCU" | 0, 3 | MCU |
| "i2c::CAM" | 1, 2, 4 | Camera |
| "i2c::LCD" | 5, 6 | GSP |
| "i2c::DEB" | 7, 8 | Unknown |
| "i2c::HID" | 9, 10, 11, 12 | HID |
| "i2c::IR" | 13, and additionally for New3DS i2c module: 17 | IR |
| "i2c::EEP" | 14 | Cfg |
|
New3DS-sysmodule specific services: | ||
| "i2c::NFC" | 15 | New3DS NFC |
| "i2c::QTM" | 16 | New3DS QTM |
Each I2C service can only access certain I2C device(s).
I2C Service
| Command Header | Description | Available since system-version |
|---|---|---|
| 0x00010100 | ReplaceRegisterBits8 | All |
| 0x000200C0 | SetRegisterBits8 | All |
| 0x000300C0 | ClearRegisterBits8 | All |
| 0x00040102 | MultiReplaceRegisterBits16 | All |
| 0x000500C0 | WriteRegister8 | All |
| 0x00060080 | WriteDeviceRaw8 | All |
| 0x000700C0 | WriteRegister16 | All |
| 0x000800C2 | MultiWriteRegister16 | All |
| 0x00090080 | ReadRegister8 | All |
| 0x000A0080 | ReadRegister16 | All |
| 0x000B00C2 | WriteRegisters8 | All |
| 0x000C00C2 | WriteRegisters16 | All |
| 0x000D00C0 | ReadRegisters8 | All |
| 0x000E00C2 | WriteRegisters8_2 | All |
| 0x000F00C0 | LegacyReadRegisters8 | All |
| 0x001000C0 | ReadRegisters16 | All |
| 0x001100C2 | WriteRegistersBuffer8 | All |
| 0x001200C2 | ReadRegistersBuffer8 | All |
|
and, for the New3DS-specific version of the sysmodule (though technically the Old3DS supports these commands as well): | ||
| 0x00130040 | ReadDeviceRaw8 | 8.0.0-18 |
| 0x00140082 | WriteDeviceRaw | 8.0.0-18 |
| 0x00150080 | ReadDeviceRaw | 8.0.0-18 |
Commands 0x00140082 and 0x00150080 are used by NFC module.
Command 0x00150080 is also used for reading ZL, ZR, and C-stick data by IR Services.
Common Result Values
| Result code | Description |
|---|---|
| 0xE0A02FEA | The current session is not permitted to access the specified device ID. |
| 0xF9602FEF | Communication error. Device may not be connected. |