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Buffer int msg to ensure alignment and placement correctness.

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This commit is contained in:
HiFiPhile
2024-04-27 17:12:00 +02:00
parent 98e85a296d
commit fdb431b5c7
2 changed files with 19 additions and 16 deletions
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18
src/class/usbtmc/usbtmc_device.c
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@@ -86,6 +86,11 @@ tu_static char logMsg[150];
// imposes a minimum buffer size of 32 bytes.
#define USBTMCD_BUFFER_SIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
// Interrupt endpoint buffer size, default to 2 bytes as USB488 specification.
#ifndef CFG_TUD_USBTMC_INT_EP_SIZE
#define CFG_TUD_USBTMC_INT_EP_SIZE 2
#endif
/*
* The state machine does not allow simultaneous reading and writing. This is
* consistent with USBTMC.
@@ -124,13 +129,15 @@ typedef struct
uint8_t ep_bulk_in;
uint8_t ep_bulk_out;
uint8_t ep_int_in;
uint32_t ep_bulk_in_wMaxPacketSize;
uint32_t ep_bulk_out_wMaxPacketSize;
// IN buffer is only used for first packet, not the remainder
// in order to deal with prepending header
CFG_TUSB_MEM_ALIGN uint8_t ep_bulk_in_buf[USBTMCD_BUFFER_SIZE];
uint32_t ep_bulk_in_wMaxPacketSize;
// OUT buffer receives one packet at a time
CFG_TUSB_MEM_ALIGN uint8_t ep_bulk_out_buf[USBTMCD_BUFFER_SIZE];
uint32_t ep_bulk_out_wMaxPacketSize;
// Buffer int msg to ensure alignment and placement correctness
CFG_TUSB_MEM_ALIGN uint8_t ep_int_in_buf[CFG_TUD_USBTMC_INT_EP_SIZE];
uint32_t transfer_size_remaining; // also used for requested length for bulk IN.
uint32_t transfer_size_sent; // To keep track of data bytes that have been queued in FIFO (not header bytes)
@@ -243,12 +250,13 @@ bool tud_usbtmc_transmit_dev_msg_data(
bool tud_usbtmc_transmit_notification_data(const void * data, size_t len)
{
#ifndef NDEBUG
TU_ASSERT(len >= 1);
TU_ASSERT(len > 0);
TU_ASSERT(usbtmc_state.ep_int_in != 0);
#endif
if (usbd_edpt_busy(usbtmc_state.rhport, usbtmc_state.ep_int_in)) return false;
TU_VERIFY(usbd_edpt_busy(usbtmc_state.rhport, usbtmc_state.ep_int_in));
TU_VERIFY(usbd_edpt_xfer(usbtmc_state.rhport, usbtmc_state.ep_int_in, (void *)(uintptr_t) data, len));
TU_VERIFY(tu_memcpy_s(usbtmc_state.ep_int_in_buf, sizeof(usbtmc_state.ep_int_in_buf), data, len) == 0);
TU_VERIFY(usbd_edpt_xfer(usbtmc_state.rhport, usbtmc_state.ep_int_in, usbtmc_state.ep_int_in_buf, len));
return true;
}