Hi, I have a buffer with 65000 values in 16 bits from the ADC read that I need to provide to my computer running a python code.
Any suggestion how can I handle this in both sides?
I'm trying to use this function but I'm getting weird data when I'm listening the COM port with Putty.
// Generalized function to transmit any 16bits buffer over USB
void send_16b_buffer_over_usb(uint16_t *buffer, uint32_t buffer_size)
{
uint32_t total_bytes = buffer_size * BYTES_PER_SAMPLE; // Total size of the buffer in bytes
uint32_t bytes_sent = 0;
uint8_t result = USBD_OK;
// Send the buffer in chunks
while (bytes_sent < total_bytes)
{
// Calculate the remaining bytes to be sent
uint32_t bytes_to_send = (total_bytes - bytes_sent > CHUNK_SIZE) ? CHUNK_SIZE : (total_bytes - bytes_sent);
// Send the current chunk of data
result = CDC_Transmit_HS((uint8_t*)&buffer[bytes_sent / BYTES_PER_SAMPLE], bytes_to_send);
// Wait for the USB transmission to complete
while (result == USBD_BUSY)
{
result = CDC_Transmit_HS((uint8_t*)&buffer[bytes_sent / BYTES_PER_SAMPLE], bytes_to_send);
}
// If the transmission was successful, update the sent bytes counter
if (result == USBD_OK)
{
bytes_sent += bytes_to_send;
}
else
{
// Handle transmission failure (optional)
break;
}
}
}
If I do something simple like this it work fine:
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t *data = "Hello World from USB CDC\n";
/* USER CODE END 0 */
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USB_DEVICE_Init();
while (1)
{
CDC_Transmit_FS(data, strlen(data));
HAL_Delay (1000);
}
}
Thank you.
