Ec specification: Difference between revisions
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These pages will eventually document the commands and responsibilities of the EC in the XO system. |
These pages will eventually document the commands and responsibilities of the EC in the XO system. |
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Currently its not much more than a cut and paste from a variety of emails, trac tickets, and operational info extracted from the way the EC is known to work. |
Currently its not much more than a cut and paste from a variety of emails, trac tickets, and operational info extracted from the way the EC is known to work. Some of the descriptions are a bit odd and terse as the source is from non-native English speakers. Verbosity will be expanded as time allows. |
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=== EC Commands === |
=== EC Commands === |
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** Bit 1: 1: battery full charged |
** Bit 1: 1: battery full charged |
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** Bit 2: 1: battery low |
** Bit 2: 1: battery low |
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** Bit 3: 1: battery destroys |
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** Bit 4: 1: AC in |
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** Bits 5-7 Not defined |
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* 0x16 Read Battery State of Charge (SOC) (1 byte) |
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* 0x17 Read Battery gas guage chip serial number (6 bytes) |
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* 0x18 Read Battery gas guage data |
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* 0x19 Read board id (1 byte) |
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* 0x1a Read SCI source (1 byte) |
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** 0x01 Game button |
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** 0x02 Battery Status Change. Generated for any of: |
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h. 0x17 // Read gas guage chip serial number (6 bytes) |
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*** AC plugged/unplugged |
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*** Battery inserted/removed |
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i. 0x18 // Read gas guage data |
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*** Battery Low |
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*** Battery full |
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j. 0x19 // Read board id (1 byte) |
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*** Battery destroy |
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** 0x04 Battery SOC Change |
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** 0x08 Battery subsystem error |
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** 0x10 Ebook mode change |
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* 0x1b Game key status (2 bytes) 9 bits of key status. 1 indicates key is depressed. |
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** Bit 1: KEY_LR_R |
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SCI_WACKUP_EVENT 0x01 // Game button |
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** Bit 2: KEY_RT_R |
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** Bit 3: KEY_UP_L |
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SCI_BATTERY_STATUS_CHANGE 0x02 // AC plugged/unplugged, Battery inserted/remove, |
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** Bit 4: KEY_DN_L |
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** Bit 5: KEY_LF_L |
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// Battery Low, Battery full, Battery destorys |
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** Bit 6: KEY_RT_L |
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** Bit 7: KEY_COLOR/MONO |
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SCI_SOC_CHANGE 0x04 // SOC Change |
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** Bit 8: KEY_UP_R |
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** Bit 9: KEY_DN_R |
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SCI_ABNORMAL_EVENT 0x08 // Battery Abnormal |
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* 0x1c Read SCI mask (1 byte) |
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* 0x1d Write SCI mask (1 byte) |
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* 0x1e Set date (day/mon/year) |
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** Need details for using this. |
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* 0x1f Read battery subsystem error code (1 byte) |
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** 0x02 Pack info fail (LiFePO4 & NiMH) |
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** 0x04 Over voltage checking fail (LiFePO4) |
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** 0x05 Over temperature (58C) (LiFePO4) |
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It will return 2 bytes key status (only 9 bits used). The bits define as following. |
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** 0x06 Gauge stop or sensor break (LiFePO4 & NiMH) |
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** 0x07 Sensor out of control (NiMH) |
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** 0x09 Battery ID fail & temperature > 52C Unknown ID |
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** 0x10 ACR fail (NiMH) |
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* 0x23 Set WLAN Power on/off |
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* 0x24 Wake up WLAN |
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* 0x25 WLAN reset |
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* 0x26 DCON power enable/disable |
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Bit 3: KEY_UP_L, Bit 2: KEY_RT_R, Bit 1:KEY_LR_R |
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m. 0x1c // Read SCI mask (1 byte) |
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o. 0x1d // Write SCI mask (1 byte) |
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p. 0x1e // Set date (day/mon/year) |
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q. 0x1f // Read Abnormal code (1 byte) |
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There are abnormal codes define as following: |
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0x02 - Pack info fail LiFePO4 & NiMH |
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0x04 - Over voltage checking fail LiFePO4 |
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0x05 - Over temperature (58C) LiFePO4 |
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0x06 - Gauge stop or sensor break!! LiFePO4 & NiMH |
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0x07 - Sensor out of control NiMH |
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0x09 - Battery ID fail & temperature > 52C Unknown ID |
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0x10 - ACR fail NiMH |
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r. 0x23 // Set WLAN Power on/off |
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s. 0x24 // Wake up WLAN |
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t. 0x25 // WLAN reset |
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u. 0x26 // DCON power enable/disable |
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Revision as of 23:46, 7 May 2007
This page is monitored by the OLPC team.
Operational Specification of the XO embedded controller (EC)
These pages will eventually document the commands and responsibilities of the EC in the XO system. Currently its not much more than a cut and paste from a variety of emails, trac tickets, and operational info extracted from the way the EC is known to work. Some of the descriptions are a bit odd and terse as the source is from non-native English speakers. Verbosity will be expanded as time allows.
EC Commands
- 0x10 Read voltage (2 bytes)
- 0x11 Read current (2 bytes)
- 0x12 Read ACR (2 bytes)
- 0x13 Read bat temperature (2 bytes)
- 0x14 Read ambient temperature (2 bytes)
- 0x15 Read battery status (1 byte)
- Bit 0: 1: battery exists
- Bit 1: 1: battery full charged
- Bit 2: 1: battery low
- Bit 3: 1: battery destroys
- Bit 4: 1: AC in
- Bits 5-7 Not defined
- 0x16 Read Battery State of Charge (SOC) (1 byte)
- 0x17 Read Battery gas guage chip serial number (6 bytes)
- 0x18 Read Battery gas guage data
- 0x19 Read board id (1 byte)
- 0x1a Read SCI source (1 byte)
- 0x01 Game button
- 0x02 Battery Status Change. Generated for any of:
- AC plugged/unplugged
- Battery inserted/removed
- Battery Low
- Battery full
- Battery destroy
- 0x04 Battery SOC Change
- 0x08 Battery subsystem error
- 0x10 Ebook mode change
- 0x1b Game key status (2 bytes) 9 bits of key status. 1 indicates key is depressed.
- Bit 1: KEY_LR_R
- Bit 2: KEY_RT_R
- Bit 3: KEY_UP_L
- Bit 4: KEY_DN_L
- Bit 5: KEY_LF_L
- Bit 6: KEY_RT_L
- Bit 7: KEY_COLOR/MONO
- Bit 8: KEY_UP_R
- Bit 9: KEY_DN_R
- 0x1c Read SCI mask (1 byte)
- 0x1d Write SCI mask (1 byte)
- 0x1e Set date (day/mon/year)
- Need details for using this.
- 0x1f Read battery subsystem error code (1 byte)
- 0x02 Pack info fail (LiFePO4 & NiMH)
- 0x04 Over voltage checking fail (LiFePO4)
- 0x05 Over temperature (58C) (LiFePO4)
- 0x06 Gauge stop or sensor break (LiFePO4 & NiMH)
- 0x07 Sensor out of control (NiMH)
- 0x09 Battery ID fail & temperature > 52C Unknown ID
- 0x10 ACR fail (NiMH)
- 0x23 Set WLAN Power on/off
- 0x24 Wake up WLAN
- 0x25 WLAN reset
- 0x26 DCON power enable/disable