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add device cdc wanted char callback, cdc peek

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This commit is contained in:
hathach
2018-07-14 23:28:07 +07:00
parent e0c4e11ea3
commit 19b6bbfd14
4 changed files with 50 additions and 18 deletions
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53
src/class/cdc/cdc_device.c
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@@ -79,8 +79,10 @@ typedef struct
//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN static uint8_t _tmp_rx_buf[64];
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN static uint8_t _tmp_tx_buf[64];
// TODO multiple interfaces
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN static uint8_t _rx_buf[64];
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN static uint8_t _tx_buf[64];
static cdcd_interface_t _cdcd_itf[CFG_TUD_CDC];
@@ -105,7 +107,7 @@ void tud_cdc_n_get_line_coding (uint8_t itf, cdc_line_coding_t* coding)
void tud_cdc_n_set_wanted_char (uint8_t itf, char wanted)
{
_cdcd_itf[itf].intact.wanted_char = wanted;
}
@@ -128,6 +130,12 @@ uint32_t tud_cdc_n_read(uint8_t itf, void* buffer, uint32_t bufsize)
return tu_fifo_read_n(&_cdcd_itf[itf].intact.rx_ff, buffer, bufsize);
}
char tud_cdc_n_peek(uint8_t itf, int pos)
{
char ch;
return tu_fifo_peek_at(&_cdcd_itf[itf].intact.rx_ff, pos, &ch) ? ch : (-1);
}
//--------------------------------------------------------------------+
// WRITE API
//--------------------------------------------------------------------+
@@ -147,11 +155,11 @@ bool tud_cdc_n_flush (uint8_t itf)
uint8_t edpt = _cdcd_itf[itf].ep_in;
VERIFY( !dcd_edpt_busy(TUD_RHPORT, edpt) ); // skip if previous transfer not complete
uint16_t count = tu_fifo_read_n(&_cdcd_itf[itf].intact.tx_ff, _tmp_tx_buf, sizeof(_tmp_tx_buf));
uint16_t count = tu_fifo_read_n(&_cdcd_itf[itf].intact.tx_ff, _tx_buf, sizeof(_tx_buf));
VERIFY( tud_cdc_n_connected(itf) ); // fifo is empty if not connected
if ( count ) TU_ASSERT( dcd_edpt_xfer(TUD_RHPORT, edpt, _tmp_tx_buf, count) );
if ( count ) TU_ASSERT( dcd_edpt_xfer(TUD_RHPORT, edpt, _tx_buf, count) );
return true;
}
@@ -166,6 +174,15 @@ void cdcd_init(void)
for(uint8_t i=0; i<CFG_TUD_CDC; i++)
{
_cdcd_itf[i].intact.wanted_char = -1;
// default line coding is : stop bit = 1, parity = none, data bits = 8
_cdcd_itf[i].intact.line_coding.bit_rate = 115200;
_cdcd_itf[i].intact.line_coding.stop_bits = 0;
_cdcd_itf[i].intact.line_coding.parity = 0;
_cdcd_itf[i].intact.line_coding.data_bits = 8;
// config fifo
tu_fifo_config(&_cdcd_itf[i].intact.rx_ff, _cdcd_itf[i].intact.rx_ff_buf, CFG_TUD_CDC_RX_BUFSIZE, 1, true);
tu_fifo_config(&_cdcd_itf[i].intact.tx_ff, _cdcd_itf[i].intact.tx_ff_buf, CFG_TUD_CDC_TX_BUFSIZE, 1, false);
}
@@ -243,7 +260,7 @@ tusb_error_t cdcd_open(uint8_t rhport, tusb_desc_interface_t const * p_interface
}
// Prepare for incoming data
TU_ASSERT( dcd_edpt_xfer(rhport, p_cdc->ep_out, _tmp_rx_buf, sizeof(_tmp_rx_buf)), TUSB_ERROR_DCD_EDPT_XFER);
TU_ASSERT( dcd_edpt_xfer(rhport, p_cdc->ep_out, _rx_buf, sizeof(_rx_buf)), TUSB_ERROR_DCD_EDPT_XFER);
return TUSB_ERROR_NONE;
}
@@ -297,18 +314,30 @@ tusb_error_t cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, u
{
// TODO Support multiple interfaces
uint8_t const itf = 0;
cdcd_interface_t const * p_cdc = &_cdcd_itf[itf];
cdcd_interface_t* p_cdc = &_cdcd_itf[itf];
// receive new data
if ( ep_addr == p_cdc->ep_out )
{
tu_fifo_write_n(&_cdcd_itf[itf].intact.rx_ff, _tmp_rx_buf, xferred_bytes);
char const wanted = p_cdc->intact.wanted_char;
// preparing for next
TU_ASSERT( dcd_edpt_xfer(rhport, p_cdc->ep_out, _tmp_rx_buf, sizeof(_tmp_rx_buf)), TUSB_ERROR_DCD_EDPT_XFER );
for(uint32_t i=0; i<xferred_bytes; i++)
{
// Check for wanted char and invoke callback if needed
if ( tud_cdc_rx_wanted_cb && ( wanted != -1 ) && ( wanted == _rx_buf[i] ) )
{
tud_cdc_rx_wanted_cb(itf, wanted);
}else
{
tu_fifo_write(&p_cdc->intact.rx_ff, &_rx_buf[i]);
}
}
// fire callback
if (tud_cdc_rx_cb) tud_cdc_rx_cb(itf);
// invoke receive callback (if there is still data)
if (tud_cdc_rx_cb && tu_fifo_count(&p_cdc->intact.rx_ff) ) tud_cdc_rx_cb(itf);
// prepare for next
TU_ASSERT( dcd_edpt_xfer(rhport, p_cdc->ep_out, _rx_buf, sizeof(_rx_buf)), TUSB_ERROR_DCD_EDPT_XFER );
}
// nothing to do with in and notif endpoint