Update SN in USBN device using the device ID

Author: earlephilhower

cores/rp2040/SerialUSB.cpp

@@ -32,6 +32,7 @@ extern "C" {
 #include "hardware/irq.h"
 #include "pico/mutex.h"
 #include "hardware/watchdog.h"
+#include "pico/unique_id.h"
 
 #define PICO_STDIO_USB_TASK_INTERVAL_US 1000
 #define PICO_STDIO_USB_LOW_PRIORITY_IRQ 31
@@ -84,11 +85,13 @@ static const uint8_t usbd_desc_cfg[USBD_DESC_LEN] = {
         USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),
 };
 
+static char _idString[PICO_UNIQUE_BOARD_ID_SIZE_BYTES * 2 + 1];
+
 static const char *const usbd_desc_str[] = {
     [USBD_STR_0] = "",
     [USBD_STR_MANUF] = "Raspberry Pi",
     [USBD_STR_PRODUCT] = "PicoArduino",
-    [USBD_STR_SERIAL] = "000000000000", // TODO
+    [USBD_STR_SERIAL] = _idString,
     [USBD_STR_CDC] = "Board CDC",
 };
 
@@ -149,6 +152,16 @@ void SerialUSB::begin(unsigned long baud) {
         return;
     }
 
+    // Get ID string into human readable serial number
+    pico_unique_board_id_t id;
+    pico_get_unique_board_id(&id);
+    _idString[0] = 0;
+    for (auto i = 0; i < PICO_UNIQUE_BOARD_ID_SIZE_BYTES; i++) {
+        char hx[3];
+        sprintf(hx, "%02X", id.id[i]);
+        strcat(_idString, hx);
+    }
+
     tusb_init();
 
     irq_set_exclusive_handler(PICO_STDIO_USB_LOW_PRIORITY_IRQ, low_priority_worker_irq);

platform.txt

@@ -40,7 +40,7 @@ compiler.warning_flags.more=-Wall
 compiler.warning_flags.all=-Wall -Wextra
 
 compiler.defines={build.led}
-compiler.includes=-I{runtime.platform.path}/pico_base/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include/ -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include/  -I{runtime.platform.path}/pico-sdk/src/common/pico_stdlib/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_gpio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_i2c/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_flash/include -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include -I{runtime.platform.path}/pico-examples/build/generated/pico_base -I{runtime.platform.path}/pico-sdk/src/boards/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_base/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_structs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_claim/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_sync/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_divider/include -I{runtime.platform.path}/pico-sdk/src/common/pico_time/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include -I{runtime.platform.path}/pico-sdk/src/common/pico_sync/include -I{runtime.platform.path}/pico-sdk/src/common/pico_util/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_runtime/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_clocks/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_resets/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_watchdog/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_xosc/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pll/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_vreg/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_irq/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_printf/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_bootrom/include -I{runtime.platform.path}/pico-sdk/src/common/pico_bit_ops/include -I{runtime.platform.path}/pico-sdk/src/common/pico_divider/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_double/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_int64_ops/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_float/include -I{runtime.platform.path}/pico-sdk/src/common/pico_binary_info/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/lib/tinyusb/src/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_usb/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_spi/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pwm/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_adc/include
+compiler.includes=-I{runtime.platform.path}/pico_base/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_unique_id/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include/ -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include/ -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include/  -I{runtime.platform.path}/pico-sdk/src/common/pico_stdlib/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_gpio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_i2c/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_flash/include -I{runtime.platform.path}/pico-sdk/src/common/pico_base/include -I{runtime.platform.path}/pico-examples/build/generated/pico_base -I{runtime.platform.path}/pico-sdk/src/boards/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_platform/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_base/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_structs/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_claim/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_sync/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_divider/include -I{runtime.platform.path}/pico-sdk/src/common/pico_time/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_timer/include -I{runtime.platform.path}/pico-sdk/src/common/pico_sync/include -I{runtime.platform.path}/pico-sdk/src/common/pico_util/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_runtime/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_clocks/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_resets/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_watchdog/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_xosc/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pll/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_vreg/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_irq/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_printf/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_bootrom/include -I{runtime.platform.path}/pico-sdk/src/common/pico_bit_ops/include -I{runtime.platform.path}/pico-sdk/src/common/pico_divider/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_double/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_int64_ops/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_float/include -I{runtime.platform.path}/pico-sdk/src/common/pico_binary_info/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_uart/include -I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/ -I{runtime.platform.path}/pico-sdk/lib/tinyusb/src/ -I{runtime.platform.path}/pico-sdk/src/rp2_common/pico_stdio_usb/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_spi/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_pwm/include -I{runtime.platform.path}/pico-sdk/src/rp2_common/hardware_adc/include
 compiler.flags=-Os -march=armv6-m -mcpu=cortex-m0plus -mthumb -ffunction-sections -fdata-sections
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