1 files changed, 224 insertions, 0 deletions

diff --git a/quantum/split_common/transport.c b/quantum/split_common/transport.c
new file mode 100644
index 000000000..95738530e
--- /dev/null
+++ b/quantum/split_common/transport.c
@@ -0,0 +1,224 @@
+
+#include "config.h"
+#include "matrix.h"
+#include "quantum.h"
+
+#define ROWS_PER_HAND (MATRIX_ROWS/2)
+
+#ifdef RGBLIGHT_ENABLE
+#   include "rgblight.h"
+#endif
+
+#ifdef BACKLIGHT_ENABLE
+# include "backlight.h"
+  extern backlight_config_t backlight_config;
+#endif
+
+#if defined(USE_I2C) || defined(EH)
+
+#include "i2c.h"
+
+#ifndef SLAVE_I2C_ADDRESS
+#  define SLAVE_I2C_ADDRESS           0x32
+#endif
+
+#if (MATRIX_COLS > 8)
+#  error "Currently only supports 8 COLS"
+#endif
+
+// Get rows from other half over i2c
+bool transport_master(matrix_row_t matrix[]) {
+  int err = 0;
+
+  // write backlight info
+#ifdef BACKLIGHT_ENABLE
+  if (BACKLIT_DIRTY) {
+    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
+    if (err) { goto i2c_error; }
+
+    // Backlight location
+    err = i2c_master_write(I2C_BACKLIT_START);
+    if (err) { goto i2c_error; }
+
+    // Write backlight
+    i2c_master_write(get_backlight_level());
+
+    BACKLIT_DIRTY = false;
+  }
+#endif
+
+  err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
+  if (err) { goto i2c_error; }
+
+  // start of matrix stored at I2C_KEYMAP_START
+  err = i2c_master_write(I2C_KEYMAP_START);
+  if (err) { goto i2c_error; }
+
+  // Start read
+  err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
+  if (err) { goto i2c_error; }
+
+  if (!err) {
+    int i;
+    for (i = 0; i < ROWS_PER_HAND-1; ++i) {
+      matrix[i] = i2c_master_read(I2C_ACK);
+    }
+    matrix[i] = i2c_master_read(I2C_NACK);
+    i2c_master_stop();
+  } else {
+i2c_error: // the cable is disconnceted, or something else went wrong
+    i2c_reset_state();
+    return false;
+  }
+
+#ifdef RGBLIGHT_ENABLE
+  if (RGB_DIRTY) {
+    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
+    if (err) { goto i2c_error; }
+
+    // RGB Location
+    err = i2c_master_write(I2C_RGB_START);
+    if (err) { goto i2c_error; }
+
+    uint32_t dword = eeconfig_read_rgblight();
+
+    // Write RGB
+    err = i2c_master_write_data(&dword, 4);
+    if (err) { goto i2c_error; }
+
+    RGB_DIRTY = false;
+    i2c_master_stop();
+  }
+#endif
+
+  return true;
+}
+
+void transport_slave(matrix_row_t matrix[]) {
+
+  for (int i = 0; i < ROWS_PER_HAND; ++i)
+  {
+    i2c_slave_buffer[I2C_KEYMAP_START + i] = matrix[i];
+  }
+  // Read Backlight Info
+  #ifdef BACKLIGHT_ENABLE
+  if (BACKLIT_DIRTY)
+  {
+    backlight_set(i2c_slave_buffer[I2C_BACKLIT_START]);
+    BACKLIT_DIRTY = false;
+  }
+  #endif
+  #ifdef RGBLIGHT_ENABLE
+  if (RGB_DIRTY)
+  {
+    // Disable interupts (RGB data is big)
+    cli();
+    // Create new DWORD for RGB data
+    uint32_t dword;
+
+    // Fill the new DWORD with the data that was sent over
+    uint8_t * dword_dat = (uint8_t *)(&dword);
+    for (int i = 0; i < 4; i++)
+    {
+      dword_dat[i] = i2c_slave_buffer[I2C_RGB_START + i];
+    }
+
+    // Update the RGB now with the new data and set RGB_DIRTY to false
+    rgblight_update_dword(dword);
+    RGB_DIRTY = false;
+    // Re-enable interupts now that RGB is set
+    sei();
+  }
+  #endif
+}
+
+void transport_master_init(void) {
+  i2c_master_init();
+}
+
+void transport_slave_init(void) {
+  i2c_slave_init(SLAVE_I2C_ADDRESS);
+}
+
+#else // USE_SERIAL
+
+#include "serial.h"
+
+typedef struct _Serial_s2m_buffer_t {
+  // TODO: if MATRIX_COLS > 8 change to uint8_t packed_matrix[] for pack/unpack
+  matrix_row_t smatrix[ROWS_PER_HAND];
+} Serial_s2m_buffer_t;
+
+typedef struct _Serial_m2s_buffer_t {
+#ifdef BACKLIGHT_ENABLE
+    uint8_t backlight_level;
+#endif
+#if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+    rgblight_config_t rgblight_config; //not yet use
+    //
+    // When MCUs on both sides drive their respective RGB LED chains,
+    // it is necessary to synchronize, so it is necessary to communicate RGB information.
+    // In that case, define the RGBLIGHT_SPLIT macro.
+    //
+    // Otherwise, if the master side MCU drives both sides RGB LED chains,
+    // there is no need to communicate.
+#endif
+} Serial_m2s_buffer_t;
+
+volatile Serial_s2m_buffer_t serial_s2m_buffer = {};
+volatile Serial_m2s_buffer_t serial_m2s_buffer = {};
+uint8_t volatile status0 = 0;
+
+SSTD_t transactions[] = {
+  { (uint8_t *)&status0,
+    sizeof(serial_m2s_buffer), (uint8_t *)&serial_m2s_buffer,
+    sizeof(serial_s2m_buffer), (uint8_t *)&serial_s2m_buffer
+  }
+};
+
+void transport_master_init(void)
+{ soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
+
+void transport_slave_init(void)
+{ soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
+
+bool transport_master(matrix_row_t matrix[]) {
+
+  if (soft_serial_transaction()) {
+    return false;
+  }
+
+  // TODO:  if MATRIX_COLS > 8 change to unpack()
+  for (int i = 0; i < ROWS_PER_HAND; ++i) {
+    matrix[i] = serial_s2m_buffer.smatrix[i];
+  }
+
+  #if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+    // Code to send RGB over serial goes here (not implemented yet)
+  #endif
+
+  #ifdef BACKLIGHT_ENABLE
+    // Write backlight level for slave to read
+    serial_m2s_buffer.backlight_level = backlight_config.enable ? backlight_config.level : 0;
+  #endif
+
+  return true;
+}
+
+void transport_slave(matrix_row_t matrix[]) {
+
+  // TODO: if MATRIX_COLS > 8 change to pack()
+  for (int i = 0; i < ROWS_PER_HAND; ++i)
+  {
+    serial_s2m_buffer.smatrix[i] = matrix[i];
+  }
+  #ifdef BACKLIGHT_ENABLE
+    backlight_set(serial_m2s_buffer.backlight_level);
+  #endif
+  #if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
+  // Add serial implementation for RGB here
+  #endif
+
+}
+
+#endif