Mass Storage Mode Receive Data From Host Fail Issue!
- January 11, 2022
- 1 reply
- 1047 views
Hi All,
I am working on a SCSI device read/write project.
(Base on STM32CubeMX V6.4, Chip STM32F103)
Now the windows can recognized this device as a pen driver and I can send data
from Device to Host just like send data for read capacity.
EX
int8_t SCSI_ProcessCmd(USBD_HandleTypeDef *pdev, uint8_t lun, uint8_t *cmd)
{
USBD_MSC_BOT_HandleTypeDef *hmsc = (USBD_MSC_BOT_HandleTypeDef *) pdev->pClassData;
switch (cmd[0])
{
….
case 0xF7:
USBD_MSC_BOT_HandleTypeDef *hmsc = (USBD_MSC_BOT_HandleTypeDef *) pdev->pClassData;
if (hmsc->bot_state == USBD_BOT_IDLE) /* Idle */
{
/* Device To Host */
if ((hmsc->cbw.bmFlags & 0x80U) == 0x80U)
{
hmsc->bot_data[0] = 0x00U;
hmsc->bot_data[1] = 0x01U;
hmsc->bot_data[2] = 0x02U;
hmsc->bot_data[3] = 0x03U;
hmsc->bot_data_length = 4U;
}
else/* Host To Device */
{
USBD_LL_PrepareReceive(pdev, MSC_EPOUT_ADDR, hmsc->bot_data, 4);
}
}
break;
…
}
return 0;
}
And it working well as picture1.
Now I try to send data(4 Bytes) from host to device.
And the device fail(stall) to receive data from host.
Please check picture2.
According to the soft- Analyzer the data is receive OK, but fail on next test unit ready.
Please help me and give me some advices, thanks!
