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49 lines
1.1 KiB
49 lines
1.1 KiB
9 years ago
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#include "datalink.h"
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#include "com_fileio.h"
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#include "debug.h"
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#include "com_fileio.h"
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SBMP_Endpoint *dlnk_ep;
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static void dlnk_tx(uint8_t b);
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static void dlnk_rx_bridge(ComIface *iface);
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/** Set up the datalink */
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void dlnk_init(void)
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{
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// Allocate & setup the endpoint
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dlnk_ep = sbmp_ep_init(NULL, NULL, 100, dlnk_rx, dlnk_tx);
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sbmp_ep_seed_session(dlnk_ep, 0x3FFF); // just in case arbitration fails
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sbmp_ep_enable(dlnk_ep, true);
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sbmp_ep_init_listeners(dlnk_ep, NULL, 4); // really don' need many here..
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data_iface->rx_callback = dlnk_rx_bridge;
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}
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/**
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* Bridge between USART subsystem's Rx buffer, and the SBMP driver
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*
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* Called if bytes are received in the USART buffer,
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* and the USART subsystem is polled.
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*/
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static void dlnk_rx_bridge(ComIface *iface)
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{
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uint8_t b;
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while (com_rx(iface, &b)) {
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SBMP_RxStatus st = sbmp_ep_receive(dlnk_ep, b);
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// If byte was not accepted, try to put it back into the buffer
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if (st == SBMP_RX_BUSY || st == SBMP_RX_DISABLED) {
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com_unrx(iface, b);
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break;
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}
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}
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}
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/** Datalink Tx func */
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static void dlnk_tx(uint8_t b)
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{
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com_tx(data_iface, b);
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}
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