DFU: initialize g_dfu during real power up
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.
diff --git a/firmware/apps/dfu/main.c b/firmware/apps/dfu/main.c
index 6cdad20..a99c3fd 100644
--- a/firmware/apps/dfu/main.c
+++ b/firmware/apps/dfu/main.c
@@ -176,6 +176,7 @@
{
uint8_t isUsbConnected = 0;
unsigned int i = 0;
+ uint32_t reset_cause = (RSTC->RSTC_SR & RSTC_SR_RSTTYP_Msk) >> RSTC_SR_RSTTYP_Pos;
led_init();
led_blink(LED_GREEN, BLINK_3O_30F);
@@ -201,7 +202,11 @@
TRACE_INFO("Serial Nr. %08x-%08x-%08x-%08x\n\r",
g_unique_id[0], g_unique_id[1],
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();