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Firmware/EFM8/sdk/Device/EFM8UB2/bsp/efm8_memory_lcd/spi.c

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+/**************************************************************************//**
+ * Copyright (c) 2015 by Silicon Laboratories Inc. All rights reserved.
+ *
+ * http://developer.silabs.com/legal/version/v11/Silicon_Labs_Software_License_Agreement.txt
+ *****************************************************************************/
+/////////////////////////////////////////////////////////////////////////////
+// Spi.c
+/////////////////////////////////////////////////////////////////////////////
+
+// SPI FIFO Format
+// ---------------
+//
+// All SPI transfers are pushed to the TX FIFO with the transfer size in
+// bytes followed by the data to transmit.
+
+/////////////////////////////////////////////////////////////////////////////
+// Includes
+/////////////////////////////////////////////////////////////////////////////
+
+#include "bsp.h"
+#include "spi.h"
+#include "spi_0.h"
+#include <string.h>
+
+/////////////////////////////////////////////////////////////////////////////
+// Globals
+/////////////////////////////////////////////////////////////////////////////
+
+static SI_SEGMENT_VARIABLE(TxBuffer[SPI_BUF_SIZE], uint8_t, EFM8PDL_SPI0_TX_SEGTYPE);
+
+static volatile uint8_t TransferState = ST_IDLE;
+static volatile uint8_t TransferSize = 0;
+
+/////////////////////////////////////////////////////////////////////////////
+// Functions
+/////////////////////////////////////////////////////////////////////////////
+
+void SPI_StartTransfer(SI_VARIABLE_SEGMENT_POINTER(buffer, uint8_t, SI_SEG_GENERIC), uint8_t size)
+{
+  uint8_t sfrPageSave;
+  uint8_t i;
+
+  // Wait for previous transfer to complete
+  while (TransferState != ST_IDLE);
+
+  // Start new transfer
+  TransferState = ST_CS_SETUP;
+  TransferSize = size;
+
+  for (i = 0; i < size; i++)
+  {
+    TxBuffer[i] = buffer[i];
+  }
+
+  sfrPageSave = SFRPAGE;
+  SFRPAGE = LEGACY_PAGE;
+
+  // CS setup time
+  // Timer 2 overflows at end of setup time
+  TMR2 = (uint16_t)-(DELAY_TIMER_FREQ / 1000000 * SPI_CS_SETUP_US);
+  BSP_DISP_CS = SPI_CS_ASSERT_LVL;
+  TMR2CN0 |= TMR2CN0_TR2__BMASK;
+
+  SFRPAGE = sfrPageSave;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// Interrupt Service Handlers
+/////////////////////////////////////////////////////////////////////////////
+
+void SPI0_transferCompleteCb(void)
+{
+  uint8_t sfrPageSave;
+
+  // CS hold time
+  TransferState = ST_CS_HOLD;
+
+  sfrPageSave = SFRPAGE;
+  SFRPAGE = LEGACY_PAGE;
+
+  // CS hold time
+  // Timer 2 overflows at end of hold time
+  TMR2 = (uint16_t)-(DELAY_TIMER_FREQ / 1000000 * SPI_CS_HOLD_US);
+  TMR2CN0 |= TMR2CN0_TR2__BMASK;
+
+  SFRPAGE = sfrPageSave;
+}
+
+//-----------------------------------------------------------------------------
+// TIMER2_ISR
+//-----------------------------------------------------------------------------
+//
+// TIMER2 ISR Content goes here. Remember to clear flag bits:
+// TMR2CN::TF2H (Timer # High Byte Overflow Flag)
+// TMR2CN::TF2L (Timer # Low Byte Overflow Flag)
+//
+//-----------------------------------------------------------------------------
+SI_INTERRUPT (TIMER2_ISR, TIMER2_IRQn)
+{
+  TMR2CN0 &= ~TMR2CN0_TF2H__BMASK;
+
+  // Stop timer
+  TMR2CN0 &= ~TMR2CN0_TR2__BMASK;
+
+  // CS setup complete
+  if (TransferState == ST_CS_SETUP)
+  {
+    TransferState = ST_TX;
+    SPI0_transfer(TxBuffer, NULL, SPI0_TRANSFER_TX, TransferSize);
+  }
+  // CS hold complete
+  else if (TransferState == ST_CS_HOLD)
+  {
+    // Deassert CS
+    BSP_DISP_CS = SPI_CS_DEASSERT_LVL;
+
+    // Transfer complete
+    TransferState = ST_IDLE;
+  }
+}

Firmware/EFM8/sdk/Device/EFM8UB2/bsp/efm8_memory_lcd/tick.c

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+/**************************************************************************//**
+ * Copyright (c) 2015 by Silicon Laboratories Inc. All rights reserved.
+ *
+ * http://developer.silabs.com/legal/version/v11/Silicon_Labs_Software_License_Agreement.txt
+ *****************************************************************************/
+/////////////////////////////////////////////////////////////////////////////
+// Tick.c
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Includes
+/////////////////////////////////////////////////////////////////////////////
+
+#include "bsp.h"
+#include "tick.h"
+
+/////////////////////////////////////////////////////////////////////////////
+// Globals
+/////////////////////////////////////////////////////////////////////////////
+
+static volatile uint16_t Ticks = 0;
+
+/////////////////////////////////////////////////////////////////////////////
+// Functions
+/////////////////////////////////////////////////////////////////////////////
+
+//---------------------------------------------------------------------------
+// GetTickCount
+//---------------------------------------------------------------------------
+//
+// Description - Return the system up time in milliseconds
+//
+// return - Number of milliseconds since system start.
+//
+uint16_t GetTickCount()
+{
+    uint16_t ticks;
+
+    // Disable Timer 3 interrupts
+    EIE1 &= ~EIE1_ET3__BMASK;
+
+    ticks = Ticks;
+
+    // Enable Timer 3 interrupts
+    EIE1 |= EIE1_ET3__BMASK;
+
+    return ticks;
+}
+
+//---------------------------------------------------------------------------
+// Wait
+//---------------------------------------------------------------------------
+//
+// Description - Wait the specified number of milliseconds
+//
+// ms - The number of milliseconds to wait
+//
+void Wait(uint16_t ms)
+{
+    uint16_t ticks = GetTickCount();
+
+    while ((GetTickCount() - ticks) < ms);
+}
+
+//-----------------------------------------------------------------------------
+// TIMER3_ISR
+//-----------------------------------------------------------------------------
+//
+// TIMER3 ISR Content goes here. Remember to clear flag bits:
+// TMR3CN::TF3H (Timer # High Byte Overflow Flag)
+// TMR3CN::TF3L (Timer # Low Byte Overflow Flag)
+//
+//-----------------------------------------------------------------------------
+SI_INTERRUPT (TIMER3_ISR, TIMER3_IRQn)
+{
+    // Overflows every 1 ms
+    TMR3CN0 &= ~TMR3CN0_TF3H__BMASK;
+
+    Ticks++;
+}