STM32F103 USB device get report

Posted on January 09, 2018 at 10:53

Hey

Krishna.Hari

,

In fact you can't use directly mouse example. It is really hard to modify it to create a keyboard. You need to use custom usb hid. You can take a look at my github

https://github.com/F0cks/F0cks_BluePill_Keyboard/tree/develop

. (develop branch, not master).

I have created a software to replace a broken board in an old keyboard with a bluepill (stm32f103C8).

You do not need to understand the whole code, just compare the differences between original HAL and my modifications.

You can also use and test my code to create your own keyboard. You just need to modify the descriptor (

https://github.com/F0cks/F0cks_BluePill_Keyboard/blob/develop/Application/Inc/keyboard_descriptor.h

) and change gpio and keymap assignment (

https://github.com/F0cks/F0cks_BluePill_Keyboard/blob/develop/Application/Inc/keyboard_config.h

).

Good luck!

Geo

Posted on January 09, 2018 at 11:43

I think you can modify main.c to write 'Hello'. I would remove everything in 'while(1)' loop and add something like that:

// Empty hid handler
keyboardHID.modifiers = 0;
for ( i=0; i<CUSTOM_KEYBOARD_SIMULT_KEYS; i++ ) {
 keyboardHID.keys[i] = 0x00;
}
keyboardHID.modifiers = 0x20; // Shift
keyboardHID.keys[0] = 0x0B; // H
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.modifiers = 0x00;
keyboardHID.keys[0] = 0x00;
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x08; // e
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x00;
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x0F; // l
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x00;
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x0F; // l
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x00;
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x12; // o
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
HAL_Delay(10);
keyboardHID.keys[0] = 0x00;
USBD_CUSTOM_HID_SendReport(&hUsbDeviceFS, &keyboardHID, sizeof(keyboardHID_t));
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HARI krishna wrote:

2.What is meant by USB Mass storage class in stm32f103c8t6 i.e.how to interface SD card using SPI.How SPI and USB is related in driver.

??? I do not understand the relation between keyboard and that. But you can probably update the descriptor to add a mass storage section. SPI and USB are not related at all. If you also want to use SPI you need to init SPI library. You will probably have to look at the mass storage example.