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DFU: initialize g_dfu during real power up

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At power-up we need to initialize g_dfu once, to ensure a consistent
state.  Afterwards we want to keep it across (software) reset, but on
power-up the memory would otherwise be filled with random data, causing
issues with detection of DFU/Runtime switching.
This commit is contained in:
Harald Welte
2017-03-06 21:51:55 +01:00
parent 96065cacd7
commit 5b108d8cf0
1 changed files with 6 additions and 1 deletions
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7
firmware/apps/dfu/main.c
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@@ -176,6 +176,7 @@ extern int main(void)
{ {
uint8_t isUsbConnected = 0; uint8_t isUsbConnected = 0;
unsigned int i = 0; unsigned int i = 0;
uint32_t reset_cause = (RSTC->RSTC_SR & RSTC_SR_RSTTYP_Msk) >> RSTC_SR_RSTTYP_Pos;
led_init(); led_init();
led_blink(LED_GREEN, BLINK_3O_30F); led_blink(LED_GREEN, BLINK_3O_30F);
@@ -201,7 +202,11 @@ extern int main(void)
TRACE_INFO("Serial Nr. %08x-%08x-%08x-%08x\n\r", TRACE_INFO("Serial Nr. %08x-%08x-%08x-%08x\n\r",
g_unique_id[0], g_unique_id[1], g_unique_id[0], g_unique_id[1],
g_unique_id[2], g_unique_id[3]); g_unique_id[2], g_unique_id[3]);
TRACE_INFO("Reset Cause: 0x%x\n\r", (RSTC->RSTC_SR & RSTC_SR_RSTTYP_Msk) >> RSTC_SR_RSTTYP_Pos); TRACE_INFO("Reset Cause: 0x%x\n\r", reset_cause);
/* clear g_dfu on power-up reset */
if (reset_cause == 0)
memset(g_dfu, 0, sizeof(*g_dfu));
board_main_top(); board_main_top();