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move reinvoke_isp to separate file, and fix it. 

Note: Proto#1 badges need an small hardware patch %-)
This commit is contained in:
Stefan `Sec` Zehl 2011-05-21 01:29:18 +02:00
parent 3f3d18b1bb
commit 589b4aaf6a
2 changed files with 52 additions and 61 deletions
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61
main.c
View File

@ -125,64 +125,3 @@ int main(void) {
return 0; return 0;
} }
/* This data must be global so it is not read from the stack */
typedef void (*IAP)(uint32_t [], uint32_t []);
IAP my_iap_entry = (IAP)0x1fff1ff1;
uint32_t command[5], result[4];
/* This function resets some microcontroller peripherals to reset
hardware configuration to ensure that the USB In-System Programming module
will work properly. It is normally called from reset and assumes some reset
configuration settings for the MCU.
Some of the peripheral configurations may be redundant in your specific
project.
*/
void ReinvokeISP(void) {
command[0] = 57;
/* Disable SYSTICK timer and interrupt before calling into ISP */
SYSTICK_STCTRL &= ~(SYSTICK_STCTRL_ENABLE | SYSTICK_STCTRL_TICKINT);
/* make sure USB clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x04000;
/* make sure 32-bit Timer 1 is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x00400;
/* make sure GPIO clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x00040;
/* make sure IO configuration clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x10000;
/* make sure AHB clock divider is 1:1 */
SCB_SYSAHBCLKDIV = 1;
/* Send Reinvoke ISP command to ISP entry point*/
gpioSetValue (CFG_LED_PORT, CFG_LED_PIN, CFG_LED_ON);
/* Set stack pointer to ROM value (reset default) This must be the last
piece of code executed before calling ISP, because most C expressions
and function returns will fail after the stack pointer is changed. */
//__set_MSP(*((uint32_t *)0x1FFF0000)); /* inline asm function */
*((uint32_t *)(0x10000054)) = 0x0;
//set stack pointer
__asm(" ldr r0, =%0\n"
" mov sp, r0\n"
:
: "i" (0x1FFF0000));
/* Enter ISP. We call "iap_entry" to enter ISP because the ISP entry is done
through the same command interface as IAP. */
__asm(
" ldr r0, =0x39\n"
" ldr r1, =0x39\n"
" ldr r2, =0x39\n"
" ldr r3, =0x39\n"
" push {r3}\n"
" ldr r4,=0x1fff1ff1\n"
" bx r4\n"
);
//my_iap_entry(command, result);
// Not supposed to come back!
}

52
reinvoke_isp.c Normal file
View File

@ -0,0 +1,52 @@
#include "lpc134x.h"
#include "sysdefs.h"
/* Missing from core */
#define set_MSP(x) \
__asm( "msr MSP, %0\n" : : "r" (x) )
/* Jump back into bootcode, enable mass storage firmware flashing */
void ReinvokeISP(void) {
uint32_t command[5]; //
command[0] = 57;
/* Disable SYSTICK timer and interrupt before calling into ISP */
SYSTICK_STCTRL &= ~(SYSTICK_STCTRL_ENABLE | SYSTICK_STCTRL_TICKINT);
/* make sure USB clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x04000;
/* make sure 32-bit Timer 1 is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x00400;
/* make sure GPIO clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x00040;
/* make sure IO configuration clock is turned on before calling ISP */
SCB_SYSAHBCLKCTRL |= 0x10000;
/* make sure AHB clock divider is 1:1 */
SCB_SYSAHBCLKDIV = 1;
/* as per 19.2.1 of lpc13xx user manual, clear this byte of ram
to avoid long delay before USB becomes active */
*((uint32_t *)(0x10000054)) = 0x0;
/* Set stack pointer to ROM value (reset default) This must be the last
piece of code executed before calling ISP, because most C expressions
and function returns will fail after the stack pointer is changed. */
set_MSP(*(int*)0x1FFF0000);
/* Enter ISP. We call "iap_entry" to enter ISP because the ISP entry is done
through the same command interface as IAP. */
iap_entry(command, NULL);
/* Alternative shorter direct assembler way: */
/*
__asm(
"ldr r0, =%0\n"
"ldr lr, =0x1fff1ff1\n"
: : "i" (&command)
);
*/
/* NOTREACHED */
}