correct ext mem config (thnx colibri) + care for endianness

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

diff --git a/betty/fwbc.c b/betty/fwbc.c
index a625716..e8fea0d 100644 (file)
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,48 +6,123 @@
  *
  */
 
+/*
+ * include files
+ */
+
 #include "lpc2xxx.h"
 
+/*
+ * defines
+ */
+
+/* misc */
 #define OSC_CLOCK              10000000
 #define BAUDRATE               9600
 #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 addr */
+#define BANK0                  0x80000000
+#define BANK2                  0x82000000
+
+/*
+ * type definitions
+ */
+
 typedef unsigned char u8;
+typedef unsigned short u16;
 typedef unsigned int u32;
 
+/*
+ * function prototypes
+ */
+
+void mmap_init(u8 memtype);
+void uart0_init(void);
+void uart0_send_string(char *txbuf);
+void uart0_send_char(char send);
 
-/* memory mapping */
+/*
+ * main function
+ */
 
-#define        MMAP_BL         0x00
-#define MMAP_RAM       0x02
-#define MMAP_EXT       0x03
+int main(void) {
 
-void mmap_init(u8 memtype) {
+       /* variables */
 
-       MEMMAP=memtype;
-}
+       u16 *flash;
+       u32 i;
+       u8 start;
 
-void uart0_init(void) {
+       /* memory mapping of interrupt vectors to static ram */
 
-       /* pin select -> tx rx */
-       PINSEL0=0x05;
+       //mmap_init(MMAP_RAM);
 
-       /* enable fifo */
-       UART0_FCR=0x07;
+       /* uart initialization */
 
-       /* set dlab + word length */
-       UART0_LCR=0x83;
+       //uart0_init();
 
-       /* set baud rate to 9600 @ 10/4 mhz */
-       UART0_DLL=0x10;
+       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
+
+       /* external memory init */
+
+       BCFG0=0x1000FBEF;               // no boot[1:0] influence? (thnx colibri)
+                                       // BCFG2 should be fine as is
+       flash=(u16 *)BANK0;
 
-       /* unset dlab */
-       UART0_LCR=0x03;
+       /* wait for fwdump to send transmit start character */
+       start=0;
+       while(start!=0x23) {
+               while(!(UART0_LSR&(1<<0)))
+                       continue;
+               start=UART0_RBR;
+       }
+
+       /* transmit 1 mb of data */
+       for(i=0;i<524288;i++) {
+               while(!(UART0_LSR&(1<<5)))
+                       continue;
+               UART0_THR=(*flash&0xff);                // care for endianness
+               while(!(UART0_LSR&(1<<5)))
+                       continue;
+               UART0_THR=((*flash&0xff00)>>8);
+               flash++;
+       }
+
+       return 0;
 }
 
-void uart_send(char *txbuf) {
+/*
+ * 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;
 
@@ -61,20 +136,11 @@ void uart_send(char *txbuf) {
        while(!(UART0_LSR&(1<<6))) {}
 }
 
-int main(void) {
-
-       char txbuf[]="uart0 working";
-
-       /* memory mapping of interrupt vectors to static ram */
-       mmap_init(MMAP_RAM);
-
-       /* initialization */
-       uart0_init();
+void uart0_send_char(char send) {
 
-       while(1) {
-               uart_send(txbuf);
-       }
+       while(!(UART0_LSR&(1<<5)))
+               continue;
 
-       return 0;
+       UART0_THR=send;
 }