giga: fix logging without shell

Author: pennam

loader/main.c

@@ -219,14 +219,13 @@ static int loader(const struct shell *sh) {
 		return 0;
 	}
 #elif CONFIG_LOG
-	printk("Sketch debug mode: %s\n", debug ? "enabled" : "disabled");
-	if (!debug && log_backend_count_get() > 0) {
+	for (int i = 0; i < log_backend_count_get(); i++) {
 		const struct log_backend *backend;
-		// Keep only the first log backend enabled
-		for (int i = 1; i < log_backend_count_get(); i++) {
-			backend = log_backend_get(i);
-			printk("Disabling log backend %p\n", backend);
-			log_backend_disable(backend);
+		backend = log_backend_get(i);
+		log_backend_init(backend);
+		log_backend_enable(backend, backend->cb->ctx, CONFIG_LOG_DEFAULT_LEVEL);
+		if (!debug) {
+			break;
 		}
 	}
 #endif

loader/prj.conf

@@ -7,8 +7,11 @@ CONFIG_ARM_MPU=n
 
 CONFIG_LOG=y
 CONFIG_LOG_BACKEND_UART=y
-CONFIG_LOG_MODE_IMMEDIATE=y
-CONFIG_LOG_BACKEND_UART_AUTOSTART=y
+#LOG_MODE_MINIMAL and LOG_MODE_IMMEDIATE do not work with usb-cdc
+CONFIG_LOG_MODE_DEFERRED=y
+CONFIG_LOG_BUFFER_SIZE=1024
+CONFIG_LOG_DEFAULT_LEVEL=2
+CONFIG_LOG_BACKEND_UART_AUTOSTART=n
 
 CONFIG_HEAP_MEM_POOL_SIZE=32768
 CONFIG_MAIN_STACK_SIZE=32768

variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.conf

@@ -1,18 +1,18 @@
 CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=y
 CONFIG_USB_DEVICE_PRODUCT="Arduino GIGA R1"
 CONFIG_USB_DEVICE_MANUFACTURER="Arduino"
 CONFIG_USB_DEVICE_VID=0x2341
 CONFIG_USB_DEVICE_PID=0x0066
 
 CONFIG_USB_CDC_ACM=y
-CONFIG_USB_CDC_ACM_RINGBUF_SIZE=512
+CONFIG_USB_CDC_ACM_RINGBUF_SIZE=1024
 CONFIG_UART_LINE_CTRL=y
 CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT=y
 
 CONFIG_LLEXT_STORAGE_WRITABLE=n
 CONFIG_SHARED_MULTI_HEAP=y
-CONFIG_HEAP_MEM_POOL_SIZE=24576
-CONFIG_SHELL_STACK_SIZE=32768
+CONFIG_HEAP_MEM_POOL_SIZE=96000
 CONFIG_MAIN_STACK_SIZE=32768
 CONFIG_LLEXT_HEAP_SIZE=128
 

variants/arduino_giga_r1_stm32h747xx_m7/arduino_giga_r1_stm32h747xx_m7.overlay

@@ -326,7 +326,7 @@
 
 	log_uarts: log_uarts {
 		compatible = "zephyr,log-uart";
-		uarts = <&usart2 &board_cdc_acm_uart>;
+		uarts = <&usart1 &board_cdc_acm_uart>;
 	};
 
 	/* used to overcome problems with _C analog pins */