Fix bug when setting baudrate that can prevent the ASIC from working

[eandersson]

When setting the baud rate, we need to ensure that all serial communication is transmitted; otherwise, the ASIC may not be initialized properly. As a result, the device would be unable to hash anything until the next reboot.

The easiest way to reproduce this issue is by disabling logging. However, it can occur with any device at any time due to a bit of bad luck during startup.

diff --git a/main/main.c b/main/main.c
index dbc467b..8e7fb4e 100644
--- a/main/main.c
+++ b/main/main.c
@@ -35,6 +35,8 @@ void app_main(void)
 {
     ESP_LOGI(TAG, "Welcome to the bitaxe - hack the planet!");
 
+    esp_log_level_set("*", ESP_LOG_WARN);
+
     // Init I2C
     ESP_ERROR_CHECK(i2c_bitaxe_init());
     ESP_LOGI(TAG, "I2C initialized successfully");

[WantClue]

LGTM

[benjamin-wilson]

1 second is way too long

[eandersson]

1 second is way too long

It does not actually wait for 1 second, that is just the longest it would possibly wait for tx to finish.

[skot]

LGTM, nice catch.