pkernel/main.c

   1 #include "mb91465k.h"
   2 #include "flash.h"
   3
   4 #pragma section CODE=IRAM,attr=CODE
   5
   6 #define BUFSIZE 0x20
   7 #define cleardata() memset(data,0,BUFSIZE)
   8
   9 static void increaseled(void)
  10 {
  11         PDR14 = ~(((~PDR14)+1)%256);
  12         HWWD_CL = 0;
  13 }
  14
  15 static unsigned char recvbyte(void)
  16 {
  17         return Getch4();
  18 }
  19
  20 static unsigned short recvword(void)
  21 {
  22         static unsigned char b1, b2;
  23         static unsigned int ret;
  24         b1 = recvbyte();
  25         b2 = recvbyte();
  26         ret = (b2 << 8) | b1;
  27         return ret;
  28 }
  29
  30 static unsigned int recvdword(void)
  31 {
  32         static unsigned char b1, b2, b3, b4;
  33         static unsigned int ret;
  34         b1 = recvbyte();
  35         b2 = recvbyte();
  36         b3 = recvbyte();
  37         b4 = recvbyte();
  38         ret = (b4 << 24) | (b3 << 16) | (b2 << 8) | b1;
  39         return ret;
  40 }
  41
  42 static void halt(void)
  43 {
  44         while(1) {
  45                 HWWD_CL = 0;
  46         }
  47 }
  48
  49 static void panic(void)
  50 {
  51         PDR14 = 0xff;
  52         PDR14 = 0x22;
  53         halt();
  54 }
  55
  56 void main(void)
  57 {
  58         unsigned int address;
  59         unsigned short i, size;
  60         unsigned char running = 1, data[BUFSIZE] = {0};
  61
  62         PORTEN = 0x3; /* enable I/O Ports */
  63
  64         /*Enable LEDs*/
  65         DDR14 = 0xFF;
  66         PDR14 = 0xff;
  67
  68         /*Initialize UART4*/
  69         InitUart4();
  70
  71         while(running) {
  72                 cleardata();
  73                 increaseled();
  74                 switch(recvbyte()) {
  75                         case 0x13: //receive
  76                                 Putch4(0x37);
  77                                 increaseled();
  78
  79                                 address = recvdword();
  80                                 increaseled();
  81
  82                                 size = recvword();
  83                                 increaseled();
  84
  85                                 Putch4(0x04); //Received Metadata.
  86                                 PDR14 = 0xff;
  87                                 for(i=0; i<size; i++) { /* get data */
  88                                         increaseled();
  89                                         data[i] = recvbyte();
  90                                 }
  91                                 Putch4(0x08); //Received Data.
  92
  93                                 PDR14 = 0xff;
  94                                 for(i=0; i<size; i+=4) { /* erase */
  95                                         if(FLASH_SectorErase(address + i) != 1) {
  96                                                 panic();
  97                                         }
  98                                         increaseled();
  99                                 }
 100
 101                                 Putch4(0x18); //Erasing done.
 102                                 for(i=0; i<size; i++) { /* flash the data */
 103                                         increaseled();
 104                                         if(FLASH_WriteHalfWord(address + (2*i), data[i]) != 1) {
 105                                                 panic();
 106                                         }
 107                                 }
 108                                 Putch4(0x28); //Flashing done.
 109                                 break;
 110
 111                         case 0x99: /* exit */
 112                                 running = 0;
 113                                 break;
 114                         default: break;
 115                 }
 116         }
 117
 118         PDR14 = 0x55; //signal that we finished now!
 119         halt();
 120
 121 #if 0
 122         i = 0;
 123         baseaddr = 0xf4000;
 124         for (; i <0x10; i+=4) {
 125                 (void) FLASH_SectorErase(baseaddr + i);
 126                 increaseled();
 127         }
 128
 129         i = 0;
 130         baseaddr = 0xf4000;
 131         for(; i<9; i++) {
 132                 increaseled();
 133                 (void) FLASH_WriteHalfWord(baseaddr + (2*i), toflash[i]);
 134         }
 135
 136 #endif
 137 }
 138