betty/fwbc.c

   1 /*
   2  * fwbc.c - broadcast the betty tv original firmware via uart0
   3  *          use fwdump to write it onto your computers harddisk
   4  *
   5  * author: hackbard@hackdaworld.org
   6  *
   7  */
   8
   9 /*
  10  * include files
  11  */
  12
  13 #include "lpc2xxx.h"
  14
  15 /*
  16  * defines
  17  */
  18
  19 /* misc */
  20 #define OSC_CLOCK               10000000
  21 #define BAUDRATE                9600
  22 #define P_DIV                   4
  23 #define P_CLOCK                 (OSC_CLOCK/P_DIV)
  24
  25 /* memory mapping */
  26 #define MMAP_BL                 0x00
  27 #define MMAP_RAM                0x02
  28 #define MMAP_EXT                0x03
  29
  30 /*
  31  * type definitions
  32  */
  33
  34 typedef unsigned char u8;
  35 typedef unsigned int u32;
  36
  37 /*
  38  * function prototypes
  39  */
  40
  41 void mmap_init(u8 memtype);
  42 void uart0_init(void);
  43 void uart0_send_string(char *txbuf);
  44 void uart0_send_char(char send);
  45
  46 /*
  47  * main function
  48  */
  49
  50 int main(void) {
  51
  52         /* memory mapping of interrupt vectors to static ram */
  53
  54         //mmap_init(MMAP_RAM);
  55
  56         /* uart initialization */
  57
  58 #ifdef USE_FUNCTIONS
  59         //uart0_init();
  60 #else
  61         PINSEL0=0x05;                   // pin select -> tx, rx
  62         UART0_FCR=0x07;                 // enable fifo
  63         UART0_LCR=0x83;                 // set dlab + word length
  64         UART0_DLL=0x10;                 // br: 9600 @ 10/4 mhz
  65         UART0_DLM=0x00;
  66         UART0_LCR=0x03;                 // unset dlab
  67 #endif
  68
  69         /* external memory init */
  70
  71         while(1) {
  72                 while(!(UART0_LSR&(1<<5)))
  73                         continue;
  74                 UART0_THR=0x23;
  75         }
  76
  77         return 0;
  78 }
  79
  80 /*
  81  * functions
  82  */
  83
  84 void mmap_init(u8 memtype) {
  85
  86         MEMMAP=memtype;
  87 }
  88
  89 void uart0_init(void) {
  90
  91         PINSEL0=0x05;                   // pin select -> tx, rx
  92         UART0_FCR=0x07;                 // enable fifo
  93         UART0_LCR=0x83;                 // set dlab + word length
  94         UART0_DLL=0x10;                 // br: 9600 @ 10/4 mhz
  95         UART0_DLM=0x00;
  96         UART0_LCR=0x03;                 // unset dlab
  97 }
  98
  99 void uart0_send_string(char *txbuf) {
 100
 101         int i;
 102
 103         i=0;
 104
 105         while(txbuf[i])
 106                 UART0_THR=txbuf[i++];
 107         UART0_THR='\n';
 108         UART0_THR='\r';
 109
 110         while(!(UART0_LSR&(1<<6))) {}
 111 }
 112
 113 void uart0_send_char(char send) {
 114
 115         while(!(UART0_LSR&(1<<5)))
 116                 continue;
 117
 118         UART0_THR=send;
 119 }
 120