Difference between revisions of "GPIO Registers"
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| Line 149: | Line 149: | ||
== GPIO == | == GPIO == | ||
=== GPIO pins === | === GPIO pins === | ||
| + | |||
| + | Only GPIO2 and GPIO3 pins have their interrupts configurable. Active low pins should be configured as "falling edge", and output ports shouldn't have interrupts enabled at all. | ||
| + | |||
[[GPIO Services]] bitmasks use this table, in that order: | [[GPIO Services]] bitmasks use this table, in that order: | ||
| Line 159: | Line 162: | ||
| 0 | | 0 | ||
| ? | | ? | ||
| − | | | + | | Debug button (?) (active-low) |
|- | |- | ||
| 1 | | 1 | ||
| − | | 0x63 (falling edge) | + | | 0x63 (falling edge) |
| − | | Touch Pen | + | | Touch Pen down (active low, 0 = screen pressed) |
|- | |- | ||
| 2 | | 2 | ||
| Line 172: | Line 175: | ||
| 0 | | 0 | ||
| 0x64 | | 0x64 | ||
| − | | Headphones | + | | Headphones detected (CODEC) |
|- | |- | ||
| 1 | | 1 | ||
| 0x66 | | 0x66 | ||
| − | | | + | | TWL depop circuit (?) (CODEC, active-low) |
|-style="border-top: double" | |-style="border-top: double" | ||
| DATA2.0 | | DATA2.0 | ||
| Line 184: | Line 187: | ||
| 0 | | 0 | ||
| 0x68 | | 0x68 | ||
| − | | C-stick | + | | C-stick interrupt |
|- | |- | ||
| 1 | | 1 | ||
| 0x69 | | 0x69 | ||
| − | | IrDA | + | | IrDA interrupt (active-low) |
|- | |- | ||
| 2 | | 2 | ||
| 0x6A | | 0x6A | ||
| − | | Gyro | + | | Gyro interrupt |
|- | |- | ||
| 3 | | 3 | ||
| 0x6B | | 0x6B | ||
| − | | | + | | C-stick "stop" (output) |
|- | |- | ||
| 4 | | 4 | ||
| 0x6C | | 0x6C | ||
| − | | | + | | IrDA TX-RC (output) |
|- | |- | ||
| 5 | | 5 | ||
| 0x6D | | 0x6D | ||
| − | | | + | | IrDA RXD (active-low) |
|- | |- | ||
| 6 | | 6 | ||
| 0x6E | | 0x6E | ||
| − | | | + | | NFC output1 (?) |
|- | |- | ||
| 7 | | 7 | ||
| 0x6F | | 0x6F | ||
| − | | | + | | NFC output2 (?) |
|- | |- | ||
| 8 | | 8 | ||
| 0x70 | | 0x70 | ||
| − | | | + | | Headphones inserted (active-low) |
|- | |- | ||
| 9 | | 9 | ||
| 0x71 | | 0x71 | ||
| − | | MCU | + | | MCU interrupt |
|- | |- | ||
| 10 | | 10 | ||
| 0x72 | | 0x72 | ||
| − | | NFC | + | | NFC interrupt (?) |
|- | |- | ||
| 11 | | 11 | ||
| 0x73 | | 0x73 | ||
| − | | | + | | QTM output (?) |
|- | |- | ||
|-style="border-top: double" | |-style="border-top: double" | ||
Revision as of 20:32, 24 January 2021
Registers
GPIO
| Old3DS | Name | Address | Width |
|---|---|---|---|
| Yes | GPIO1_DATA | 0x10147000 | 1 |
| Yes | GPIO2_DATA | 0x10147010 | 1 |
| Yes | GPIO2_DIR | 0x10147011 | 1 |
| Yes | GPIO2_INTCFG | 0x10147012 | 1 |
| Yes | GPIO2_INTEN | 0x10147013 | 1 |
| Yes | GPIO2_DATA2 | 0x10147014 | 2 |
| Yes | GPIO3_DATA | 0x10147020 | 2 |
| Yes | GPIO3_DIR | 0x10147022 | 2 |
| Yes | GPIO3_INTCFG | 0x10147024 | 2 |
| Yes | GPIO3_INTEN | 0x10147026 | 2 |
| Yes | GPIO2_DATA2 | 0x10147028 | 2 |
Legacy RTC
| Name | Address | Width | Description |
|---|---|---|---|
| RTC_CNT | 0x10147100 | 2 | Control register |
| RTC_REG_STAT1 | 0x10147110 | 1 | Rtc status register 1 (command 0). Bitswapped |
| RTC_REG_STAT2 | 0x10147111 | 1 | Rtc status register 2 (command 1). Bitswapped |
| RTC_REG_CLKADJ | 0x10147112 | 1 | Rtc clock adjustment register (command 6). Bitswapped |
| RTC_REG_FREE | 0x10147113 | 1 | The free general purpose rtc register (command 7). Bitswapped |
| RTC_REG_TIME1 | 0x10147120 | 4 | Byte-wise bit-swapped (bit7 is bit0, etc.) BCD RTC (byte0 = seconds, byte1 = minutes, byte2 = hours, byte3 = day of week) |
| RTC_REG_TIME2 | 0x10147124 | 4 (3?) | Day, month and year all byte-wise bit-swapped |
| RTC_REG_ALRMTIM1 | 0x10147130 | 4 (3?) | Rtc alarm time register 1 (command 4). Byte-wise bit-swapped |
| RTC_REG_ALRMTIM2 | 0x10147134 | 4 (3?) | Rtc alarm time register 2 (command 5). Byte-wise bit-swapped |
| RTC_REG_COUNT | 0x10147140 | 4 (3?) | Rtc dsi counter register (ex command 0). Byte-wise bit-swapped |
| RTC_REG_FOUT1 | 0x10147150 | 1 | Rtc dsi fout register 1 (ex command 1). Bitswapped |
| RTC_REG_FOUT2 | 0x10147151 | 1 | Rtc dsi fout register 2 (ex command 2). Bitswapped |
| RTC_REG_ALRMDAT1 | 0x10147160 | 4 (3?) | Rtc dsi alarm date register 1 (ex command 4). Byte-wise bit-swapped |
| RTC_REG_ALRMDAT2 | 0x10147164 | 4 (3?) | Rtc dsi alarm date register 2 (ex command 5). Byte-wise bit-swapped |
Descriptions
GPIO
GPIO pins
Only GPIO2 and GPIO3 pins have their interrupts configurable. Active low pins should be configured as "falling edge", and output ports shouldn't have interrupts enabled at all.
GPIO Services bitmasks use this table, in that order:
| Bit | IRQ ID | Description |
|---|---|---|
| 0 | ? | Debug button (?) (active-low) |
| 1 | 0x63 (falling edge) | Touch Pen down (active low, 0 = screen pressed) |
| 2 | 0x60 (falling edge)
0x62 (rising edge) |
Shell closed |
| 0 | 0x64 | Headphones detected (CODEC) |
| 1 | 0x66 | TWL depop circuit (?) (CODEC, active-low) |
| DATA2.0 | - | GPIO2_DATA2_0 (wifi related?) |
| 0 | 0x68 | C-stick interrupt |
| 1 | 0x69 | IrDA interrupt (active-low) |
| 2 | 0x6A | Gyro interrupt |
| 3 | 0x6B | C-stick "stop" (output) |
| 4 | 0x6C | IrDA TX-RC (output) |
| 5 | 0x6D | IrDA RXD (active-low) |
| 6 | 0x6E | NFC output1 (?) |
| 7 | 0x6F | NFC output2 (?) |
| 8 | 0x70 | Headphones inserted (active-low) |
| 9 | 0x71 | MCU interrupt |
| 10 | 0x72 | NFC interrupt (?) |
| 11 | 0x73 | QTM output (?) |
| DATA2.0 | - | GPIO3_DATA2_0 (wifi related?) |
GPIOn_DATA
Pin values, one bit per pin.
GPIOn_DIR
Pin directions for GPIO2 and GPIO3, one bit per pin.
| Value | Description |
|---|---|
| 0 | Input |
| 1 | Output |
GPIOn_INTCFG
Interrupt configuration for GPIO2 and GPIO3 pins (not the extra ones), one bit per pin.
| Value | Description |
|---|---|
| 0 | Falling edge |
| 1 | Rising edge |
GPIOn_INTEN
Interrupt enable bits for GPIO2 and GPIO3 pins (not the extra ones), one bit per pin.
| Value | Description |
|---|---|
| 0 | Interrupt disabled |
| 1 | Interrupt enabled |
GPIOn_DATA2
Extra pins for GPIO2 and GPIO3 (one bit each). These two pins, in total, are not bound to any IRQ and are not configurable.
Default values
After bootrom initialization, these are the values of the registers:
| Address | Value |
|---|---|
| 0x10147000 | 0x0003 |
| 0x10147010 | 0x00000002 |
| 0x10147014 | 0x0000 |
| 0x10147020 | 0x00000DFB |
| 0x10147024 | 0x00000000 |
| 0x10147028 | 0x0000 |
Legacy RTC
RTC_CNT (0x10147100)
| Bit | Description |
|---|---|
| 0 | Latch STAT1 |
| 1 | Latch STAT2 |
| 2 | Latch CLKADJ |
| 3 | Latch FREE |
| 4 | Latch TIME |
| 5 | Latch ALRMTIM1 |
| 6 | Latch ALRMTIM2 |
| 7 | Latch COUNT |
| 8 | Latch FOUT1 |
| 9 | Latch FOUT2 |
| 10 | Latch ALRMDAT1 |
| 11 | Latch ALRMDAT2 |
| 12 | ARM7 Busy? This may be chipselect |
| 13 | ARM7 write command received? (writing 1 clears it seems) |
| 14 | ARM7 read command recieved? (writing 1 clears it seems) |
| 15 | DS SIO SI pin (rtc irq pin) |