IAP command problems
2004-09-27 by koerner_stefan
Could anyone help me to run the IAP commands on KEIL MCB2100
(LPC2129)?
I am working with the ARM RVDS tools (& RV ICE) and tried to run a
small sample calling the IAP commands (program runs from iRAM).
Most time I get a "memory access violation" several seconds after
calling the IAP commands.
Sometimes the first IAP command (code 50) runs ok but I did never saw
a guilty write command. I tried it also with cclk = 12MHz. Do I have
to do additional initialisation?
I have reserved 16 bytes on top of Stack.
best regards
Stefan
This is my source
static void PLL_Init(void)
{
// Fosc = 12.000.000 MHz
PLLCON = 1; // enable PLL
PLLCFG = 0x24; // M=5 and P=2 -> Cclk = 60.000.000 MHz
PLLFEED = 0xAA; // PLL Feed Sequence
PLLFEED = 0x55; // PLL Feed Sequence
while (!(PLLSTAT & 0x400)); // wait for the PLL to be locked
PLLCON = 3; // enable and connect PLL
PLLFEED = 0xAA; // PLL Feed Sequence
PLLFEED = 0x55; // PLL Feed Sequence
VPBDIV = 0; // Pclk = 15.000.000 MHz
}
static void PLL_Off(void)
{
// Fosc = 12.000.000 MHz
PLLCON = 0; // disable PLL cclk = Fosc
VPBDIV = 1; // Pclk = cclk
}
void savesetup(struct SETUP *setup){
typedef void (*IAP)(unsigned int [],unsigned int[]);
unsigned int command[5];
unsigned int result[2];
IAP iap_entry;
// PLL_Off();
//__ARMLIB_disableIRQ();
iap_entry=(IAP) IAP_LOCATION;
// prepare to erase
command[0]=50;
command[1]=14; /* start sector */
command[2]=14; /* end sector */
iap_entry(command, result);
if (result[0] != 0) goto error;
// erase
command[0]=52;
command[1]=14; /* start sector */
command[2]=14; /* end sector */
command[3]=60000; /* System Clock cclk in KHz */
sendstr ("\nnow erase");
iap_entry(command, result); /* erase the block */
if (result[0] != 0) goto error;
// prepare to program
iap_entry=(IAP) IAP_LOCATION;
command[0]=50;
command[1]=14; /* start sector */
command[2]=14; /* stop sector */
sendstr ("\nnow prepair to program");
iap_entry(command, result);
if (result[0] != 0) goto error;
// program
command[0]=51;
command[1]=0x1C000; /* destination address */
command[2]=(int)setup; /* source RAM adress */
command[3]=512; /* number of Bytes*/
command[4]=60000; /* system clock cclk in KHz */
sendstr ("\nnow program");
iap_entry(command, result);
if (result[0] != 0) goto error;
//__ARMLIB_enableIRQ();
return;
error:
sendstr ("\nFlash Access error");
//__ARMLIB_enableIRQ();
}
int main (void) {
unsigned int ui_cnt;
struct SETUP setup;
struct SETUP * nonvolatile;
nonvolatile= (struct SETUP*) 0x1C000; /* Points to page 14 in Flash
(LPC2106)*/
PLL_Init();
// PLL_Off();
/* Init General Purpose I/O GPIO */
IOCLR1 = 0xFFFFFFFF;
IODIR1 = 0x00FF0000; /* Port 1[23..16] is Output LEDs */
init_serial(); /* Initialize Serial Interface */
sendstr ("\nIAP Test");
while (1) { /* Loop forever */
setup=*nonvolatile; /* read ROM to RAM */
sendstr ("\nsetup.ui_CH_ZS_Value = 0x");
sendhex((setup.ui_CH_ZS_Value[0] >> 28) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 24) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 20) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 16) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 12) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 8) & 0x0F);
sendhex((setup.ui_CH_ZS_Value[0] >> 4) & 0x0F);
sendhex(setup.ui_CH_ZS_Value[0] & 0x0F);
setup.ui_CH_ZS_Value[0]++; /*modify for test */
setup.ui_CH_FS_Value[0]++;
savesetup (&setup);
}