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TODOs for usbpd EPR impl

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This commit is contained in:
Alessandro Mauri 2026-05-09 01:06:31 +02:00
parent 0200e47327
commit f0d961a65d
1 changed files with 42 additions and 0 deletions
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42
fw/usbpd.h
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@ -101,6 +101,29 @@ typedef enum PACKED
eUSBPD_DATA_MSG_VENDOR_DEFINED = 0x0Fu eUSBPD_DATA_MSG_VENDOR_DEFINED = 0x0Fu
} USBPD_DataMessage_e; } USBPD_DataMessage_e;
typedef enum PACKED
{
eUSBPD_EXTENDED_MSG_SOURCE_CAP_EXT = 0b00001,
eUSBPD_EXTENDED_MSG_STATUS = 0b00010,
eUSBPD_EXTENDED_MSG_GET_BATTERY_CAP = 0b00011,
eUSBPD_EXTENDED_MSG_GET_BATTERY_STATUS = 0b00100,
eUSBPD_EXTENDED_MSG_BATTERY_CAP = 0b00101,
eUSBPD_EXTENDED_MSG_GET_MANUFACTURER_INFO = 0b00110,
eUSBPD_EXTENDED_MSG_MANUFACTURER_INFO = 0b00111,
eUSBPD_EXTENDED_MSG_SECURITY_REQUEST = 0b01000,
eUSBPD_EXTENDED_MSG_SECURITY_RESPONSE = 0b01001,
eUSBPD_EXTENDED_MSG_FIRMWARE_UPDATE_REQUEST = 0b01010,
eUSBPD_EXTENDED_MSG_FIRMWARE_UPDATE_RESPONSE = 0b01011,
eUSBPD_EXTENDED_MSG_PPS_STATUS = 0b01100,
eUSBPD_EXTENDED_MSG_COUNTRY_INFO = 0b01101,
eUSBPD_EXTENDED_MSG_COUNTRY_CODES = 0b01110,
eUSBPD_EXTENDED_MSG_SINK_CAP_EXTENDED = 0b01111,
eUSBPD_EXTENDED_MSG_EXTENDED_CONTROL = 0b10000,
eUSBPD_EXTENDED_MSG_EPR_SOURCE_CAP = 0b10001,
eUSBPD_EXTENDED_MSG_EPR_SINK_CAP = 0b10010,
eUSBPD_EXTENDED_MSG_VENDOR_DEFINED_EXTENDED = 0b11110
} USBPD_ExtendedMessage_e;
typedef union typedef union
{ {
uint16_t data; uint16_t data;
@ -119,6 +142,21 @@ typedef union
typedef USBPD_MessageHeader_t USBPD_ControlMessage_t; typedef USBPD_MessageHeader_t USBPD_ControlMessage_t;
static_assert( sizeof( USBPD_MessageHeader_t ) == sizeof( uint16_t ), "USBPD_MessageHeader_t size mismatch" ); static_assert( sizeof( USBPD_MessageHeader_t ) == sizeof( uint16_t ), "USBPD_MessageHeader_t size mismatch" );
typedef union
{
uint16_t data;
struct
{
uint16_t DataSize : 9u;
uint16_t Reserved : 1u;
uint16_t RequestChunk : 1u;
uint16_t ChunkNumber : 4u;
uint16_t Chunked : 1u;
};
} USBPD_ExtendedHeader_t;
static_assert( sizeof( USBPD_ExtendedHeader_t ) == sizeof( uint16_t ), "USBPD_ExtendedHeader_t size mismatch" );
typedef enum PACKED typedef enum PACKED
{ {
eUSBPD_PDO_FIXED = 0, eUSBPD_PDO_FIXED = 0,
@ -350,6 +388,8 @@ typedef union
static_assert( sizeof( USBPD_SourcePDO_t ) == sizeof( uint32_t ), "USBPD_SourcePDO_t size mismatch" ); static_assert( sizeof( USBPD_SourcePDO_t ) == sizeof( uint32_t ), "USBPD_SourcePDO_t size mismatch" );
static_assert( sizeof( USBPD_SinkPDO_t ) == sizeof( uint32_t ), "USBPD_SinkPDO_t size mismatch" ); static_assert( sizeof( USBPD_SinkPDO_t ) == sizeof( uint32_t ), "USBPD_SinkPDO_t size mismatch" );
// TODO: as per 6.15.8 EPR Source Capabilities Message, when the extended bit is
// set a extended header is present and the capabilities become from 7 to 11 PDOs
typedef union typedef union
{ {
USBPD_SourcePDO_t Source[7]; USBPD_SourcePDO_t Source[7];
@ -891,6 +931,8 @@ static void ParsePacket( void )
} }
} }
// TODO: this ignores the extended part of the protocol, so we never parse
// the extended capabilities region
if ( message.Extended || sendGoodCRC ) if ( message.Extended || sendGoodCRC )
{ {
Delay_Us( 30 ); Delay_Us( 30 );