modified while adding pic18 support

2005-04-20 17:09:26 +00:00
parent d6033b03a3
commit 4646df1188
13 changed files with 1183 additions and 204 deletions
@@ -0,0 +1,126 @@
+/**************************************************************************
+*
+* Copyright (C) 2003 Mark Norton
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*
+* Functional
+* Description:  Handles the init code for the Microchip microprocessor
+*
+*********************************************************************/
+#include <string.h>
+#include <stdint.h>
+#include "hardware.h"
+
+// define this to enable ICD - debugger
+//#define USE_ICD
+// ------------------------- Configuration Bits ----------------------------
+#pragma romdata CONFIG
+#ifdef USE_ICD
+_CONFIG_DECL (
+  _CONFIG1H_DEFAULT & _OSCS_OFF_1H & _OSC_HS_1H,
+  _CONFIG2L_DEFAULT & _BOR_ON_2L & _BORV_27_2L & _PWRT_ON_2L,
+  _CONFIG2H_DEFAULT & _WDT_OFF_2H & _WDTPS_128_2H,
+  _CONFIG3H_DEFAULT & _CCP2MUX_OFF_3H,
+  _CONFIG4L_DEFAULT & _STVR_ON_4L & _LVP_OFF_4L & _DEBUG_ON_4L,
+  _CONFIG5L_DEFAULT & _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L ,
+  _CONFIG5H_DEFAULT & _CPB_OFF_5H & _CPD_OFF_5H,
+  _CONFIG6L_DEFAULT & _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L ,
+  _CONFIG6H_DEFAULT & _WPC_OFF_6H & _WPB_OFF_6H & _WPD_OFF_6H,
+  _CONFIG7L_DEFAULT & _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L,
+  _CONFIG7H_DEFAULT & _EBTRB_OFF_7H);
+#else
+_CONFIG_DECL (
+  _CONFIG1H_DEFAULT & _OSCS_OFF_1H & _OSC_HS_1H,
+  _CONFIG2L_DEFAULT & _BOR_ON_2L & _BORV_27_2L & _PWRT_ON_2L,
+  _CONFIG2H_DEFAULT & _WDT_ON_2H & _WDTPS_128_2H,
+  _CONFIG3H_DEFAULT & _CCP2MUX_OFF_3H,
+  _CONFIG4L_DEFAULT & _STVR_ON_4L & _LVP_OFF_4L & _DEBUG_OFF_4L,
+  _CONFIG5L_DEFAULT & _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L ,
+  _CONFIG5H_DEFAULT & _CPB_OFF_5H & _CPD_OFF_5H,
+  _CONFIG6L_DEFAULT & _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L ,
+  _CONFIG6H_DEFAULT & _WPC_OFF_6H & _WPB_OFF_6H & _WPD_OFF_6H,
+  _CONFIG7L_DEFAULT & _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L,
+  _CONFIG7H_DEFAULT & _EBTRB_OFF_7H);
+
+#endif // USE_ICD
+#pragma romdata
+
+/****************************************************************************
+* DESCRIPTION: Initializes the PIC, its timers, WDT, etc.
+* RETURN:      none
+* ALGORITHM:   none
+* NOTES:       none
+*****************************************************************************/
+void init_hardware(void)
+{
+  // If the processor gets a power on reset then we can do something.
+  // We should not get a reset unless there has been 
+  // some kind of power line disturbance.
+  if (RCONbits.POR)
+  {
+    //do something special!
+  }
+
+  GLOBAL_INT_DISABLE();
+
+  /* Setup PORT A */
+  TRISA=PORT_A_TRIS_MASK;
+
+  /* PORT A can have analog inputs or digital IO */
+  ADCON1 = NO_ANALOGS;
+
+  /* Setup PORT B */
+  TRISB=PORT_B_TRIS_MASK;
+
+  /* Setup PORT C */
+  TRISC=PORT_C_TRIS_MASK;
+
+  /* setup zero cross interrupt to trigger on a low to high edge */
+  INTCON2bits.INTEDG0 = 1;
+
+  // setup ABUS
+  //ABUS_LED_OFF();
+  //SSPADD = ABUS_DEFAULT_ADDR;
+  //SSPCON1 = (ABUS_SLAVE_MASK | ABUS_CLK_ENABLE | ABUS_MODE_SETUP);
+  //ABUS_Clear_SSPBUF();
+
+  // setup timer2 to reset every 1ms
+  CloseTimer2();
+  PR2 = 250;
+  OpenTimer2(T2_PS_1_4 & T2_POST_1_5 & 0x7F);
+
+  // Setup our interrupt priorities ---------> all low priority
+  RCONbits.IPEN = 1;
+  IPR1 = 0;
+  IPR2 = 0;
+  INTCON2bits.TMR0IP = 0;
+  INTCON2bits.RBIP = 0;
+  INTCON3 = 0;
+
+  /* Enable interrupts */
+  TIMER2_INT_ENABLE();
+  PERIPHERAL_INT_ENABLE();
+  GLOBAL_INT_ENABLE();
+
+// Turn on the Zero cross interrupt
+  INTCONbits.INT0F = 0;
+  INTCONbits.INT0E = 1;
+}