X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=betty%2Ffwflash.c;fp=betty%2Ffwflash.c;h=4462654276e9d69b119e6238b9ab4ad224ed1267;hb=126d76a189309089c2cd4110d8cca1b68e35002c;hp=0000000000000000000000000000000000000000;hpb=63b32f389164de54b110cb6441e1569aee466a82;p=my-code%2Farm.git

diff --git a/betty/fwflash.c b/betty/fwflash.c
new file mode 100644
index 0000000..4462654
--- /dev/null
+++ b/betty/fwflash.c
@@ -0,0 +1,221 @@
+/*
+ * fwflash.c - handling the betty flashes
+ *
+ * author: hackbard@hackdaworld.org
+ *
+ */
+
+/*
+ * include files
+ */
+
+#include "lpc2xxx.h"
+
+/*
+ * defines
+ */
+
+/* band 0/2 addr */
+#define BANK0			0x80000000
+#define BANK2			0x82000000
+#define B0HB			0x00000000
+#define B2HB			0x02000000
+
+/* commands */
+#define CMD_READ		'R'
+#define CMD_CHIP_ERASE		'E'
+
+#define BUFSIZE			16
+
+/*
+ * type definitions
+ */
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+/*
+ * define macros
+ */
+
+#define TX_BYTE(x)		while(!(UART0_LSR&(1<<5))) continue; \
+				UART0_THR=x;
+
+#define SEND_OK			TX_BYTE('o'); TX_BYTE('k'); TX_BYTE('\n'); \
+				TX_BYTE('\r');
+
+/*
+ * function prototypes
+ */
+
+void mmap_init(u8 memtype);
+void uart0_init(void);
+void uart0_send_string(char *txbuf);
+void uart0_send_char(char send);
+
+/*
+ * main function
+ */
+
+int main(void) {
+
+	/* variables */
+
+	u32 i,addrlen,datalen;
+	u8 buf[BUFSIZE];
+	u32 addr;
+	u16 *dptr;
+	u8 cmd;
+	u8 txrx;
+
+	/* memory mapping of interrupt vectors to static ram */
+
+	//mmap_init(MMAP_RAM);
+
+	/* uart initialization */
+
+	//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
+
+	/* external memory init */
+
+	BCFG0=0x1000FBEF;		// no boot[1:0] influence? (thnx colibri)
+					// BCFG2 should be fine as is
+
+	/* begin the main loop */
+	while(1) {
+
+	/* receive cmd */
+	while(1) {
+
+		while(!(UART0_LSR&(1<<0)))
+			continue;
+		cmd=UART0_RBR;
+
+		if(cmd==CMD_CHIP_ERASE) {
+SEND_OK
+			addrlen=0;
+			datalen=1;
+			break;
+		}
+
+		if(cmd==CMD_READ) {
+			addrlen=4;
+			datalen=1;
+			break;
+		}
+	}
+
+	/* receive (only if there is) more data from uart0 */
+
+	addr=0;
+	for(i=0;i<addrlen;i++) {
+		while(!(UART0_LSR&(1<<0)))
+			continue;
+		txrx=UART0_RBR;
+		addr|=(txrx<<(i*4));
+	}
+SEND_OK
+
+	for(i=0;i<datalen;i++) {
+		while(!(UART0_LSR&(1<<0)))
+			continue;
+		buf[i++]=UART0_RBR;
+	}
+SEND_OK
+
+	/* process the cmd */
+
+	switch(cmd) {
+		case CMD_READ:
+			dptr=(u16 *)addr;
+			for(i=0;i<buf[0];i++) {
+				TX_BYTE(*dptr);
+				dptr++;
+			}
+			break;	
+		case CMD_CHIP_ERASE:
+			if(buf[0]=='0')
+				addr=B0HB;
+			else if(buf[0]=='2')
+				addr=B2HB;
+			else
+				break;
+			// cycle 1
+			dptr=(u16 *)(addr|0x555);
+			*dptr=0xaa;
+			// cycle 2
+			dptr=(u16 *)(addr|0x2aa);
+			*dptr=0x55;
+			// cycle 3+4
+			dptr=(u16 *)(addr|0x555);
+			*dptr=0x80;
+			*dptr=0xaa;
+			// cycle 5
+			dptr=(u16 *)(addr|0x2aa);
+			*dptr=0x55;
+			// cycle 6
+			dptr=(u16 *)(addr|0x555);
+			*dptr=0x10;
+SEND_OK
+			break;
+		default:
+			break;
+	}
+
+	/* send an ack, the cmd! */
+	TX_BYTE(cmd);
+		
+	}
+
+	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;
+}
+