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registers.md

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Registers

Summary

Name Offset Length Description
gpio.INTR_STATE 0x0 4 Interrupt State Register
gpio.INTR_ENABLE 0x4 4 Interrupt Enable Register
gpio.INTR_TEST 0x8 4 Interrupt Test Register
gpio.ALERT_TEST 0xc 4 Alert Test Register
gpio.DATA_IN 0x10 4 GPIO Input data read value
gpio.DIRECT_OUT 0x14 4 GPIO direct output data write value
gpio.MASKED_OUT_LOWER 0x18 4 GPIO write data lower with mask.
gpio.MASKED_OUT_UPPER 0x1c 4 GPIO write data upper with mask.
gpio.DIRECT_OE 0x20 4 GPIO Output Enable.
gpio.MASKED_OE_LOWER 0x24 4 GPIO write Output Enable lower with mask.
gpio.MASKED_OE_UPPER 0x28 4 GPIO write Output Enable upper with mask.
gpio.INTR_CTRL_EN_RISING 0x2c 4 GPIO interrupt enable for GPIO, rising edge.
gpio.INTR_CTRL_EN_FALLING 0x30 4 GPIO interrupt enable for GPIO, falling edge.
gpio.INTR_CTRL_EN_LVLHIGH 0x34 4 GPIO interrupt enable for GPIO, level high.
gpio.INTR_CTRL_EN_LVLLOW 0x38 4 GPIO interrupt enable for GPIO, level low.
gpio.CTRL_EN_INPUT_FILTER 0x3c 4 filter enable for GPIO input bits.

INTR_STATE

Interrupt State Register

  • Offset: 0x0
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "gpio", "bits": 32, "attr": ["rw1c"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw1c 0x0 gpio raised if any of GPIO pin detects configured interrupt mode

INTR_ENABLE

Interrupt Enable Register

  • Offset: 0x4
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "gpio", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 gpio Enable interrupt when corresponding bit in INTR_STATE.gpio is set.

INTR_TEST

Interrupt Test Register

  • Offset: 0x8
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "gpio", "bits": 32, "attr": ["wo"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 wo 0x0 gpio Write 1 to force corresponding bit in INTR_STATE.gpio to 1.

ALERT_TEST

Alert Test Register

  • Offset: 0xc
  • Reset default: 0x0
  • Reset mask: 0x1

Fields

{"reg": [{"name": "fatal_fault", "bits": 1, "attr": ["wo"], "rotate": -90}, {"bits": 31}], "config": {"lanes": 1, "fontsize": 10, "vspace": 130}}
Bits Type Reset Name Description
31:1 Reserved
0 wo 0x0 fatal_fault Write 1 to trigger one alert event of this kind.

DATA_IN

GPIO Input data read value

  • Offset: 0x10
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "DATA_IN", "bits": 32, "attr": ["ro"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 ro x DATA_IN

DIRECT_OUT

GPIO direct output data write value

  • Offset: 0x14
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "DIRECT_OUT", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw x DIRECT_OUT

MASKED_OUT_LOWER

GPIO write data lower with mask.

Masked write for DATA_OUT[15:0].

Upper 16 bits of this register are used as mask. Writing lower 16 bits of the register changes DATA_OUT[15:0] value if mask bits are set.

Read-back of this register returns upper 16 bits as zero and lower 16 bits as DATA_OUT[15:0].

  • Offset: 0x18
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "data", "bits": 16, "attr": ["rw"], "rotate": 0}, {"name": "mask", "bits": 16, "attr": ["wo"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:16 wo x mask Write data mask[15:0]. A value of 1 in mask[i] allows the updating of DATA_OUT[i], 0 <= i <= 15
15:0 rw x data Write data value[15:0]. Value to write into DATA_OUT[i], valid in the presence of mask[i]==1

MASKED_OUT_UPPER

GPIO write data upper with mask.

Masked write for DATA_OUT[31:16].

Upper 16 bits of this register are used as mask. Writing lower 16 bits of the register changes DATA_OUT[31:16] value if mask bits are set.

Read-back of this register returns upper 16 bits as zero and lower 16 bits as DATA_OUT[31:16].

  • Offset: 0x1c
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "data", "bits": 16, "attr": ["rw"], "rotate": 0}, {"name": "mask", "bits": 16, "attr": ["wo"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:16 wo x mask Write data mask[31:16]. A value of 1 in mask[i] allows the updating of DATA_OUT[i], 16 <= i <= 31
15:0 rw x data Write data value[31:16]. Value to write into DATA_OUT[i], valid in the presence of mask[i]==1

DIRECT_OE

GPIO Output Enable.

Setting direct_oe[i] to 1 enables output mode for GPIO[i]

  • Offset: 0x20
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "DIRECT_OE", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw x DIRECT_OE

MASKED_OE_LOWER

GPIO write Output Enable lower with mask.

Masked write for DATA_OE[15:0], the register that controls output mode for GPIO pins [15:0].

Upper 16 bits of this register are used as mask. Writing lower 16 bits of the register changes DATA_OE[15:0] value if mask bits are set.

Read-back of this register returns upper 16 bits as zero and lower 16 bits as DATA_OE[15:0].

  • Offset: 0x24
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "data", "bits": 16, "attr": ["rw"], "rotate": 0}, {"name": "mask", "bits": 16, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:16 rw x mask Write OE mask[15:0]. A value of 1 in mask[i] allows the updating of DATA_OE[i], 0 <= i <= 15
15:0 rw x data Write OE value[15:0]. Value to write into DATA_OE[i], valid in the presence of mask[i]==1

MASKED_OE_UPPER

GPIO write Output Enable upper with mask.

Masked write for DATA_OE[31:16], the register that controls output mode for GPIO pins [31:16].

Upper 16 bits of this register are used as mask. Writing lower 16 bits of the register changes DATA_OE[31:16] value if mask bits are set.

Read-back of this register returns upper 16 bits as zero and lower 16 bits as DATA_OE[31:16].

  • Offset: 0x28
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "data", "bits": 16, "attr": ["rw"], "rotate": 0}, {"name": "mask", "bits": 16, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:16 rw x mask Write OE mask[31:16]. A value of 1 in mask[i] allows the updating of DATA_OE[i], 16 <= i <= 31
15:0 rw x data Write OE value[31:16]. Value to write into DATA_OE[i], valid in the presence of mask[i]==1

INTR_CTRL_EN_RISING

GPIO interrupt enable for GPIO, rising edge.

If INTR_ENABLE[i] is true, a value of 1 on INTR_CTRL_EN_RISING[i] enables rising-edge interrupt detection on GPIO[i].

  • Offset: 0x2c
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "INTR_CTRL_EN_RISING", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 INTR_CTRL_EN_RISING

INTR_CTRL_EN_FALLING

GPIO interrupt enable for GPIO, falling edge.

If INTR_ENABLE[i] is true, a value of 1 on INTR_CTRL_EN_FALLING[i] enables falling-edge interrupt detection on GPIO[i].

  • Offset: 0x30
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "INTR_CTRL_EN_FALLING", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 INTR_CTRL_EN_FALLING

INTR_CTRL_EN_LVLHIGH

GPIO interrupt enable for GPIO, level high.

If INTR_ENABLE[i] is true, a value of 1 on INTR_CTRL_EN_LVLHIGH[i] enables level high interrupt detection on GPIO[i].

  • Offset: 0x34
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "INTR_CTRL_EN_LVLHIGH", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 INTR_CTRL_EN_LVLHIGH

INTR_CTRL_EN_LVLLOW

GPIO interrupt enable for GPIO, level low.

If INTR_ENABLE[i] is true, a value of 1 on INTR_CTRL_EN_LVLLOW[i] enables level low interrupt detection on GPIO[i].

  • Offset: 0x38
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "INTR_CTRL_EN_LVLLOW", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 INTR_CTRL_EN_LVLLOW

CTRL_EN_INPUT_FILTER

filter enable for GPIO input bits.

If CTRL_EN_INPUT_FILTER[i] is true, a value of input bit [i] must be stable for 16 cycles before transitioning.

  • Offset: 0x3c
  • Reset default: 0x0
  • Reset mask: 0xffffffff

Fields

{"reg": [{"name": "CTRL_EN_INPUT_FILTER", "bits": 32, "attr": ["rw"], "rotate": 0}], "config": {"lanes": 1, "fontsize": 10, "vspace": 80}}
Bits Type Reset Name Description
31:0 rw 0x0 CTRL_EN_INPUT_FILTER