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Diffstat (limited to 'examples/host/device_info/src/main.c')
-rw-r--r--examples/host/device_info/src/main.c83
1 files changed, 62 insertions, 21 deletions
diff --git a/examples/host/device_info/src/main.c b/examples/host/device_info/src/main.c
index 419806551..f32ed1a3e 100644
--- a/examples/host/device_info/src/main.c
+++ b/examples/host/device_info/src/main.c
@@ -72,8 +72,14 @@ CFG_TUH_MEM_SECTION struct {
} desc;
void led_blinking_task(void* param);
+void print_devinfo_task(void* param);
static void print_utf16(uint16_t* temp_buf, size_t buf_len);
+// One flag per possible device address — set by tuh_mount_cb (host task) and
+// cleared by print_devinfo_task (separate task / main loop) once the device's
+// descriptor info has been printed.
+static volatile bool need_devinfo[CFG_TUH_DEVICE_MAX + 1];
+
#if CFG_TUSB_OS == OPT_OS_FREERTOS
void init_freertos_task(void);
#endif
@@ -99,21 +105,46 @@ int main(void) {
#if CFG_TUSB_OS == OPT_OS_FREERTOS
init_freertos_task();
#else
+ board_delay(100); // wait for uart to be ready
init_tinyusb();
while (1) {
tuh_task(); // tinyusb host task
+ print_devinfo_task(NULL);
led_blinking_task(NULL);
}
- return 0;
#endif
}
/*------------- TinyUSB Callbacks -------------*/
-// Invoked when device is mounted (configured)
+// Invoked when device is mounted (configured). Runs in the host task — keep
+// it minimal. The actual descriptor fetching/printing happens in
+// print_devinfo_task() below, which runs in a different context (main loop
+// on OS_NONE / dedicated task on RTOS) where the sync helpers are safe.
void tuh_mount_cb(uint8_t daddr) {
blink_interval_ms = BLINK_MOUNTED;
+ if (daddr < TU_ARRAY_SIZE(need_devinfo)) {
+ need_devinfo[daddr] = true;
+ }
+}
+// Invoked when device is unmounted (bus reset/unplugged)
+void tuh_umount_cb(uint8_t daddr) {
+ blink_interval_ms = BLINK_NOT_MOUNTED;
+ if (daddr < TU_ARRAY_SIZE(need_devinfo)) {
+ need_devinfo[daddr] = false;
+ }
+ printf("Device removed, address = %d\r\n", daddr);
+}
+
+//--------------------------------------------------------------------+
+// Print device info task — serialises descriptor fetching across all
+// mounted devices using the sync helpers. Sync calls are safe here because
+// this task runs outside the host-task callback context (main loop on
+// OS_NONE / dedicated FreeRTOS task on RTOS).
+//--------------------------------------------------------------------+
+
+static void print_one_device(uint8_t daddr) {
// Get Device Descriptor
uint8_t xfer_result = tuh_descriptor_get_device_sync(daddr, &desc.device, 18);
if (XFER_RESULT_SUCCESS != xfer_result) {
@@ -129,11 +160,9 @@ void tuh_mount_cb(uint8_t daddr) {
}
if (XFER_RESULT_SUCCESS != xfer_result) {
uint16_t* serial = (uint16_t*)(uintptr_t) desc.serial;
- serial[0] = (uint16_t) ((TUSB_DESC_STRING << 8) | (2 * 3 + 2));
- serial[1] = 'n';
- serial[2] = '/';
- serial[3] = 'a';
- serial[4] = 0;
+ serial[0] = (uint16_t)((TUSB_DESC_STRING << 8) | (2 * 1 + 2));
+ serial[1] = '0';
+ serial[2] = 0;
}
print_utf16((uint16_t*)(uintptr_t) desc.serial, sizeof(desc.serial)/2);
printf("\r\n");
@@ -150,12 +179,9 @@ void tuh_mount_cb(uint8_t daddr) {
printf(" idProduct 0x%04x\r\n", desc.device.idProduct);
printf(" bcdDevice %04x\r\n", desc.device.bcdDevice);
- // Get String descriptor using Sync API
-
printf(" iManufacturer %u ", desc.device.iManufacturer);
if (desc.device.iManufacturer != 0) {
- xfer_result = tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, desc.buf, sizeof(desc.buf));
- if (XFER_RESULT_SUCCESS == xfer_result) {
+ if (XFER_RESULT_SUCCESS == tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, desc.buf, sizeof(desc.buf))) {
print_utf16((uint16_t*)(uintptr_t) desc.buf, sizeof(desc.buf)/2);
}
}
@@ -163,24 +189,33 @@ void tuh_mount_cb(uint8_t daddr) {
printf(" iProduct %u ", desc.device.iProduct);
if (desc.device.iProduct != 0) {
- xfer_result = tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, desc.buf, sizeof(desc.buf));
- if (XFER_RESULT_SUCCESS == xfer_result) {
+ if (XFER_RESULT_SUCCESS == tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, desc.buf, sizeof(desc.buf))) {
print_utf16((uint16_t*)(uintptr_t) desc.buf, sizeof(desc.buf)/2);
}
}
printf("\r\n");
printf(" iSerialNumber %u ", desc.device.iSerialNumber);
- printf((char*)desc.serial); // serial is already to UTF-8
- printf("\r\n");
-
+ printf("%s\r\n", (char*)desc.serial); // serial is already UTF-8
printf(" bNumConfigurations %u\r\n", desc.device.bNumConfigurations);
}
-// Invoked when device is unmounted (bus reset/unplugged)
-void tuh_umount_cb(uint8_t daddr) {
- blink_interval_ms = BLINK_NOT_MOUNTED;
- printf("Device removed, address = %d\r\n", daddr);
+void print_devinfo_task(void* param) {
+ (void) param;
+
+#if CFG_TUSB_OS == OPT_OS_FREERTOS
+ while (1) {
+#endif
+ for (uint8_t daddr = 1; daddr < TU_ARRAY_SIZE(need_devinfo); daddr++) {
+ if (need_devinfo[daddr]) {
+ need_devinfo[daddr] = false;
+ print_one_device(daddr);
+ }
+ }
+#if CFG_TUSB_OS == OPT_OS_FREERTOS
+ vTaskDelay(pdMS_TO_TICKS(10));
+ }
+#endif
}
//--------------------------------------------------------------------+
@@ -248,7 +283,7 @@ void led_blinking_task(void* param) {
#if CFG_TUSB_OS == OPT_OS_FREERTOS
vTaskDelay(blink_interval_ms / portTICK_PERIOD_MS);
#else
- if (board_millis() - start_ms < blink_interval_ms) {
+ if (tusb_time_millis_api() - start_ms < blink_interval_ms) {
return; // not enough time
}
#endif
@@ -281,6 +316,9 @@ StaticTask_t blinky_taskdef;
StackType_t usb_stack[USB_STACK_SIZE];
StaticTask_t usb_taskdef;
+
+StackType_t devinfo_stack[USB_STACK_SIZE];
+StaticTask_t devinfo_taskdef;
#endif
#ifdef ESP_PLATFORM
@@ -291,6 +329,7 @@ void app_main(void) {
void usb_host_task(void *param) {
(void) param;
+ board_delay(100); // wait for uart to be ready
init_tinyusb();
while (1) {
tuh_task();
@@ -301,9 +340,11 @@ void init_freertos_task(void) {
#if configSUPPORT_STATIC_ALLOCATION
xTaskCreateStatic(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, blinky_stack, &blinky_taskdef);
xTaskCreateStatic(usb_host_task, "usbh", USB_STACK_SIZE, NULL, configMAX_PRIORITIES-1, usb_stack, &usb_taskdef);
+ xTaskCreateStatic(print_devinfo_task, "devinfo", USB_STACK_SIZE, NULL, configMAX_PRIORITIES-2, devinfo_stack, &devinfo_taskdef);
#else
xTaskCreate(led_blinking_task, "blinky", BLINKY_STACK_SIZE, NULL, 1, NULL);
xTaskCreate(usb_host_task, "usbh", USB_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
+ xTaskCreate(print_devinfo_task, "devinfo", USB_STACK_SIZE, NULL, configMAX_PRIORITIES - 2, NULL);
#endif
// only start scheduler for non-espressif mcu
generated by cgit v1.3.1 (git 2.54.0) at 2026-08-18 22:30:23 +0000