move reinvoke_isp to separate file, and fix it.
Note: Proto#1 badges need an small hardware patch %-)
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main.c
61
main.c
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@ -125,64 +125,3 @@ int main(void) {
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return 0;
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}
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/* This data must be global so it is not read from the stack */
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typedef void (*IAP)(uint32_t [], uint32_t []);
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IAP my_iap_entry = (IAP)0x1fff1ff1;
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uint32_t command[5], result[4];
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/* This function resets some microcontroller peripherals to reset
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hardware configuration to ensure that the USB In-System Programming module
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will work properly. It is normally called from reset and assumes some reset
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configuration settings for the MCU.
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Some of the peripheral configurations may be redundant in your specific
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project.
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*/
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void ReinvokeISP(void) {
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command[0] = 57;
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/* Disable SYSTICK timer and interrupt before calling into ISP */
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SYSTICK_STCTRL &= ~(SYSTICK_STCTRL_ENABLE | SYSTICK_STCTRL_TICKINT);
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/* make sure USB clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x04000;
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/* make sure 32-bit Timer 1 is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x00400;
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/* make sure GPIO clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x00040;
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/* make sure IO configuration clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x10000;
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/* make sure AHB clock divider is 1:1 */
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SCB_SYSAHBCLKDIV = 1;
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/* Send Reinvoke ISP command to ISP entry point*/
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gpioSetValue (CFG_LED_PORT, CFG_LED_PIN, CFG_LED_ON);
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/* Set stack pointer to ROM value (reset default) This must be the last
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piece of code executed before calling ISP, because most C expressions
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and function returns will fail after the stack pointer is changed. */
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//__set_MSP(*((uint32_t *)0x1FFF0000)); /* inline asm function */
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*((uint32_t *)(0x10000054)) = 0x0;
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//set stack pointer
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__asm(" ldr r0, =%0\n"
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" mov sp, r0\n"
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:
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: "i" (0x1FFF0000));
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/* Enter ISP. We call "iap_entry" to enter ISP because the ISP entry is done
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through the same command interface as IAP. */
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__asm(
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" ldr r0, =0x39\n"
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" ldr r1, =0x39\n"
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" ldr r2, =0x39\n"
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" ldr r3, =0x39\n"
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" push {r3}\n"
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" ldr r4,=0x1fff1ff1\n"
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" bx r4\n"
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);
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//my_iap_entry(command, result);
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// Not supposed to come back!
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}
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@ -0,0 +1,52 @@
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#include "lpc134x.h"
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#include "sysdefs.h"
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/* Missing from core */
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#define set_MSP(x) \
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__asm( "msr MSP, %0\n" : : "r" (x) )
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/* Jump back into bootcode, enable mass storage firmware flashing */
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void ReinvokeISP(void) {
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uint32_t command[5]; //
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command[0] = 57;
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/* Disable SYSTICK timer and interrupt before calling into ISP */
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SYSTICK_STCTRL &= ~(SYSTICK_STCTRL_ENABLE | SYSTICK_STCTRL_TICKINT);
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/* make sure USB clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x04000;
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/* make sure 32-bit Timer 1 is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x00400;
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/* make sure GPIO clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x00040;
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/* make sure IO configuration clock is turned on before calling ISP */
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SCB_SYSAHBCLKCTRL |= 0x10000;
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/* make sure AHB clock divider is 1:1 */
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SCB_SYSAHBCLKDIV = 1;
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/* as per 19.2.1 of lpc13xx user manual, clear this byte of ram
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to avoid long delay before USB becomes active */
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*((uint32_t *)(0x10000054)) = 0x0;
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/* Set stack pointer to ROM value (reset default) This must be the last
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piece of code executed before calling ISP, because most C expressions
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and function returns will fail after the stack pointer is changed. */
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set_MSP(*(int*)0x1FFF0000);
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/* Enter ISP. We call "iap_entry" to enter ISP because the ISP entry is done
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through the same command interface as IAP. */
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iap_entry(command, NULL);
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/* Alternative shorter direct assembler way: */
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/*
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__asm(
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"ldr r0, =%0\n"
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"ldr lr, =0x1fff1ff1\n"
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: : "i" (&command)
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);
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*/
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/* NOTREACHED */
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}
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