bullshit commit, sync for travel (to zn00H!) :)

[my-code/arm.git] / betty / fwbc.c

diff --git a/betty/fwbc.c b/betty/fwbc.c
index fecb753..1874819 100644 (file)
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,54 +6,181 @@
  *
  */
 
+/*
+ * include files
+ */
+
 #include "lpc2xxx.h"
 
+/*
+ * defines
+ */
+
+/* misc */
 #define OSC_CLOCK              10000000
 #define BAUDRATE               9600
-#define P_DIV                  1
+#define P_DIV                  4
 #define P_CLOCK                        (OSC_CLOCK/P_DIV)
 
+/* memory mapping */
+#define        MMAP_BL                 0x00
+#define MMAP_RAM               0x02
+#define MMAP_EXT               0x03
+
+/* band 0/2 & bootloader addr */
+#define BANK0                  0x80000000
+#define BANK2                  0x82000000
+#define BOOTLOADER             0x7fffe000
+
+/*
+ * type definitions
+ */
+
 typedef unsigned char u8;
+typedef unsigned short u16;
 typedef unsigned int u32;
 
-void uart0_init(u32 br) {
+/*
+ * function prototypes
+ */
+
+void mmap_init(u8 memtype);
+void uart0_init(void);
+void uart0_send_string(char *txbuf);
+void uart0_send_char(char send);
 
-       /* pin select -> tx rx */
-       PINSEL0&=~((1<<0)|(1<<1)|(1<<2)|(1<<3));
-       PINSEL0|=((1<<0)|(1<<2));
+/*
+ * main function
+ */
 
-       /* divisor */
-       UART0_LCR|=(1<<7);
-       //UART0_DLL=((OSC_CLOCK/(16*br)))&0xff;
-       //UART0_DLM=(((OSC_CLOCK/(16*br)))&0xff00)>>8;
-       UART0_DLL=65;
-       UART0_DLM=0;
+int main(void) {
 
-       /* 8 bit data */
-       UART0_LCR=((1<<0)|(1<<1));
+       /* variables */
 
-       /* activate rx tx fifo */
-       UART0_FCR|=((1<<0)|(1<<1)|(1<<2));
-}
+       u16 *mem=0;
+       u32 *bl=0;
+       u32 i,len;
+       u8 start;
 
-void uart_send(u8 byte) {
+       /* memory mapping of interrupt vectors to static ram */
 
-       /* wait for empty transmit buffer */
-       while(!(UART0_LSR&(1<<5)))
-               continue;
+       //mmap_init(MMAP_RAM);
 
-       UART0_THR=byte;
-}
+       /* uart initialization */
 
-int main(void) {
+       //uart0_init();
+
+       PINSEL0=0x05;                   // pin select -> tx, rx
+       UART0_FCR=0x07;                 // enable fifo
+       UART0_LCR=0x83;                 // set dlab + word length
+       UART0_DLL=0x10;                 // br: 9600 @ 10/4 mhz
+       UART0_DLM=0x00;
+       UART0_LCR=0x03;                 // unset dlab
 
-       /* initialization */
-       uart0_init(9600);
+       /* external memory init */
+
+       BCFG0=0x1000FBEF;               // no boot[1:0] influence? (thnx colibri)
+                                       // BCFG2 should be fine as is
+
+       while(1) {
 
+       /* wait for fwdump to send transmit start character */
+       start=0x23;
        while(1) {
-               uart_send(0x23);
+               while(!(UART0_LSR&(1<<0)))
+                       continue;
+               start=UART0_RBR;
+               if(start=='0') {
+                       mem=(u16 *)BANK0;
+                       len=0x80000;
+                       break;
+               }
+               if(start=='2') {
+                       mem=(u16 *)BANK2;
+                       len=0x80000;
+                       break;
+               }
+               if(start=='b') {
+                       BCFG0=0x1000FBEF;       // 32 bit width
+                       bl=(u32 *)BOOTLOADER;
+                       len=0x800;
+                       break;
+               }
+       }
+
+       /* transmit 1 mb of data */
+       for(i=0;i<len;i++) {                    // care for endianness
+
+               while(!(UART0_LSR&(1<<5)))
+                       continue;
+               if(start=='b')
+                       UART0_THR=(*bl&0xff);
+               else
+                       UART0_THR=(*mem&0xff);
+
+               while(!(UART0_LSR&(1<<5)))
+                       continue;
+               if(start=='b')
+                       UART0_THR=((*bl&0xff00)>>8);
+               else {
+                       UART0_THR=((*mem&0xff00)>>8);
+                       mem++;
+               }
+
+               if(start=='b') {
+                       while(!(UART0_LSR&(1<<5)))
+                               continue;
+                       UART0_THR=((*bl&0xff0000)>>16);
+                       while(!(UART0_LSR&(1<<5)))
+                               continue;
+                       UART0_THR=((*bl&0xff000000)>>24);
+                       bl++;
+               }
+       }
+
        }
 
        return 0;
 }
 
+/*
+ * functions
+ */
+
+void mmap_init(u8 memtype) {
+
+       MEMMAP=memtype;
+}
+
+void uart0_init(void) {
+
+       PINSEL0=0x05;                   // pin select -> tx, rx
+       UART0_FCR=0x07;                 // enable fifo
+       UART0_LCR=0x83;                 // set dlab + word length
+       UART0_DLL=0x10;                 // br: 9600 @ 10/4 mhz
+       UART0_DLM=0x00;
+       UART0_LCR=0x03;                 // unset dlab
+}
+
+void uart0_send_string(char *txbuf) {
+
+       int i;
+
+       i=0;
+
+       while(txbuf[i])
+               UART0_THR=txbuf[i++];
+       UART0_THR='\n';
+       UART0_THR='\r';
+
+       while(!(UART0_LSR&(1<<6))) {}
+}
+
+void uart0_send_char(char send) {
+
+       while(!(UART0_LSR&(1<<5)))
+               continue;
+
+       UART0_THR=send;
+}
+