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Support different Readingmodes #42

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merged 13 commits into from
Jul 12, 2021
Merged

Support different Readingmodes #42

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334ca56
Add Support Pokemon Colosseum,XD
mizuyoukanao Mar 12, 2021
4f1eb28
Update Gamecube.c
mizuyoukanao Jul 8, 2021
596da5f
Update Gamecube.h
mizuyoukanao Jul 8, 2021
cf33bce
Update Gamecube.c
mizuyoukanao Jul 8, 2021
de1468c
Update Gamecube.h
mizuyoukanao Jul 8, 2021
b008b87
Update Gamecube.c
mizuyoukanao Jul 9, 2021
8154019
Update Gamecube.c
mizuyoukanao Jul 9, 2021
f410bc0
Update Gamecube.h
mizuyoukanao Jul 9, 2021
9f0df74
Revert "Update Gamecube.c"
NicoHood Jul 9, 2021
5826710
Fix compilation and memcpy size error
NicoHood Jul 9, 2021
85b8d86
Rename variable
NicoHood Jul 9, 2021
4fe9316
Added additional documentation
NicoHood Jul 9, 2021
b9a75f8
Added note about mode0
NicoHood Jul 9, 2021
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62 changes: 56 additions & 6 deletions src/Gamecube.c
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,54 @@ bool gc_read(const uint8_t pin, Gamecube_Report_t* report, const bool rumble)
// Gamecube Console
//================================================================================

// This function converts a report from reading mode 3 (default) to a specified target mode.
// Details of the different reading modes can be found here:
// https://github.com/dolphin-emu/dolphin/blob/master/Source/Core/Core/HW/SI/SI_DeviceGCController.cpp#L167
// Mode 0 was tested with Pokemon XD
void gc_report_convert(Gamecube_Report_t* report, Gamecube_Report_t* dest_report, uint8_t mode)
{
memcpy(dest_report, report, sizeof(Gamecube_Report_t));
if (mode == 1)
{
dest_report->mode1.cxAxis = report->cxAxis >> 4;
dest_report->mode1.cyAxis = report->cyAxis >> 4;
dest_report->mode1.left = report->left;
dest_report->mode1.right = report->right;
dest_report->mode1.analogA = 0;
dest_report->mode1.analogB = 0;
}
else if (mode == 2)
{
dest_report->mode2.cxAxis = report->cxAxis >> 4;
dest_report->mode2.cyAxis = report->cyAxis >> 4;
dest_report->mode2.left = report->left >> 4;
dest_report->mode2.right = report->right >> 4;
dest_report->mode2.analogA = 0;
dest_report->mode2.analogB = 0;
}
else if (mode == 4)
{
dest_report->mode4.cxAxis = report->cxAxis;
dest_report->mode4.cyAxis = report->cyAxis;
dest_report->mode4.analogA = 0;
dest_report->mode4.analogB = 0;
}
else if (mode == 3)
{
return;
}
// Mode 0, 5, 6, 7
else
{
dest_report->mode0.cxAxis = report->cxAxis;
dest_report->mode0.cyAxis = report->cyAxis;
dest_report->mode0.left = report->left >> 4;
dest_report->mode0.right = report->right >> 4;
dest_report->mode0.analogA = 0;
dest_report->mode0.analogB = 0;
}
}

uint8_t gc_write(const uint8_t pin, Gamecube_Status_t* status, Gamecube_Origin_t* origin, Gamecube_Report_t* report)
{
// 0 = no input/error, 1 = init, 2 = origin, 3 = read, 4 = read with rumble
Expand All @@ -99,22 +147,24 @@ uint8_t gc_write(const uint8_t pin, Gamecube_Status_t* status, Gamecube_Origin_t
uint8_t command[3];
uint8_t receivedBytes = gc_n64_get(command, sizeof(command), modePort, outPort, inPort, bitMask);

// Init
if (receivedBytes == 1 && command[0] == 0x00)
// Init or reset
if (receivedBytes == 1 && (command[0] == 0x00 || command[0] == 0xFF))
{
gc_n64_send(status->raw8, sizeof(Gamecube_Status_t), modePort, outPort, bitMask);
ret = 1;
}
// Get origin
else if (receivedBytes == 1 && command[0] == 0x41)
// Get origin or recalibrate
else if (receivedBytes == 1 && (command[0] == 0x41 || command[0] == 0x42))
{
gc_n64_send(origin->raw8, sizeof(Gamecube_Origin_t), modePort, outPort, bitMask);
ret = 2;
}
// Get data. Do not check last byte (command[2]), as the flags are unknown
else if (receivedBytes == 3 && command[0] == 0x40 && command[1] == 0x03)
else if (receivedBytes == 3 && command[0] == 0x40 && command[1] <= 0x07)
{
gc_n64_send(report->raw8, sizeof(Gamecube_Report_t), modePort, outPort, bitMask);
Gamecube_Report_t dest_report;
gc_report_convert(report, &dest_report, command[1]);
gc_n64_send(dest_report.raw8, sizeof(dest_report), modePort, outPort, bitMask);
ret = 3;
// The first byte probably flags a gamecube reading (0x40), as the same
// protocol is also used for N64. The lower nibble seems to be the mode:
Expand Down
134 changes: 132 additions & 2 deletions src/Gamecube.h
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Original file line number Diff line number Diff line change
Expand Up @@ -85,9 +85,139 @@ typedef union{
uint8_t cyAxis;
uint8_t left;
uint8_t right;
};
} Gamecube_Report_t;
}; // mode3 (default reading mode)

struct {
// first data byte (bitfields are sorted in LSB order)
uint8_t a : 1;
uint8_t b : 1;
uint8_t x : 1;
uint8_t y : 1;
uint8_t start : 1;
uint8_t origin : 1; // Indicates if GetOrigin(0x41) was called (LOW)
uint8_t errlatch : 1;
uint8_t errstat : 1;

// second data byte
uint8_t dleft : 1;
uint8_t dright : 1;
uint8_t ddown : 1;
uint8_t dup : 1;
uint8_t z : 1;
uint8_t r : 1;
uint8_t l : 1;
uint8_t high1 : 1;

// 3rd-8th data byte
uint8_t xAxis;
uint8_t yAxis;
uint8_t cxAxis;
uint8_t cyAxis;
/*
uint8_t left;
uint8_t right;
*/
uint8_t left : 4;
uint8_t right : 4;
uint8_t analogA : 4;
uint8_t analogB : 4;
} mode0;

struct {
// first data byte (bitfields are sorted in LSB order)
uint8_t a : 1;
uint8_t b : 1;
uint8_t x : 1;
uint8_t y : 1;
uint8_t start : 1;
uint8_t origin : 1; // Indicates if GetOrigin(0x41) was called (LOW)
uint8_t errlatch : 1;
uint8_t errstat : 1;

// second data byte
uint8_t dleft : 1;
uint8_t dright : 1;
uint8_t ddown : 1;
uint8_t dup : 1;
uint8_t z : 1;
uint8_t r : 1;
uint8_t l : 1;
uint8_t high1 : 1;

// 3rd-8th data byte
uint8_t xAxis;
uint8_t yAxis;
uint8_t cxAxis : 4;
uint8_t cyAxis : 4;
uint8_t left;
uint8_t right;
uint8_t analogA : 4;
uint8_t analogB : 4;
} mode1;

struct {
// first data byte (bitfields are sorted in LSB order)
uint8_t a : 1;
uint8_t b : 1;
uint8_t x : 1;
uint8_t y : 1;
uint8_t start : 1;
uint8_t origin : 1; // Indicates if GetOrigin(0x41) was called (LOW)
uint8_t errlatch : 1;
uint8_t errstat : 1;

// second data byte
uint8_t dleft : 1;
uint8_t dright : 1;
uint8_t ddown : 1;
uint8_t dup : 1;
uint8_t z : 1;
uint8_t r : 1;
uint8_t l : 1;
uint8_t high1 : 1;

// 3rd-8th data byte
uint8_t xAxis;
uint8_t yAxis;
uint8_t cxAxis : 4;
uint8_t cyAxis : 4;
uint8_t left : 4;
uint8_t right : 4;
uint8_t analogA;
uint8_t analogB;
} mode2;

struct {
// first data byte (bitfields are sorted in LSB order)
uint8_t a : 1;
uint8_t b : 1;
uint8_t x : 1;
uint8_t y : 1;
uint8_t start : 1;
uint8_t origin : 1; // Indicates if GetOrigin(0x41) was called (LOW)
uint8_t errlatch : 1;
uint8_t errstat : 1;

// second data byte
uint8_t dleft : 1;
uint8_t dright : 1;
uint8_t ddown : 1;
uint8_t dup : 1;
uint8_t z : 1;
uint8_t r : 1;
uint8_t l : 1;
uint8_t high1 : 1;

// 3rd-8th data byte
uint8_t xAxis;
uint8_t yAxis;
uint8_t cxAxis;
uint8_t cyAxis;
uint8_t analogA;
uint8_t analogB;
} mode4;

} Gamecube_Report_t;

// Gamecube an N64 use the same status schema
typedef Gamecube_N64_Status_t Gamecube_Status_t;
Expand Down