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the renumerations of USB seems to time critical. Prolonging the delay seems to improve it. Thanks to @NVX / @HenryGab for looking into it

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iceman1001 2023-12-14 00:36:07 +01:00
commit e41019e584
1 changed files with 7 additions and 1 deletions
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8
bootrom/bootrom.c
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@ -212,6 +212,12 @@ static void UsbPacketReceived(uint8_t *packet) {
reply_old(CMD_ACK, arg0, 0, 0, 0, 0);
}
// delay_loop(1) = 3.07us
static volatile uint32_t c;
static void __attribute__((optimize("O0"))) delay_loop(uint32_t delay) {
for (c = delay * 2; c; c--) {};
}
static void flash_mode(void) {
start_addr = 0;
end_addr = 0;
@ -234,7 +240,7 @@ static void flash_mode(void) {
usb_enable();
// wait for reset to be complete?
for (volatile size_t i = 0; i < 0x100000; i++) {};
delay_loop(100000);
for (;;) {
WDT_HIT();