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83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
#pragma once
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#include "arch.h"
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#include "net.h"
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struct mip_driver {
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bool (*init)(uint8_t *mac, void *data); // Initialise driver
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size_t (*tx)(const void *, size_t, void *data); // Transmit frame
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size_t (*rx)(void *buf, size_t len, void *data); // Receive frame (polling)
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bool (*up)(void *data); // Up/down status
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// Set receive callback for interrupt-driven drivers
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void (*setrx)(void (*fn)(void *buf, size_t len, void *rxdata), void *rxdata);
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};
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// Receive queue - single producer, single consumer queue. Interrupt-based
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// drivers copy received frames to the queue in interrupt context. mip_poll()
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// function runs in event loop context, reads from the queue
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struct queue {
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uint8_t *buf;
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size_t len;
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volatile size_t tail, head;
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};
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#define MIP_ARP_ENTRIES 5 // Number of ARP cache entries. Maximum 21
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#define MIP_ARP_CS (2 + 12 * MIP_ARP_ENTRIES) // ARP cache size
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// Network interface
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struct mip_if {
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uint8_t mac[6]; // MAC address. Must be set to a valid MAC
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uint32_t ip, mask, gw; // IP address, mask, default gateway. Can be 0
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struct mg_str rx; // Output (TX) buffer
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struct mg_str tx; // Input (RX) buffer
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bool use_dhcp; // Enable DCHP
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struct mip_driver *driver; // Low level driver
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void *driver_data; // Driver-specific data
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struct mg_mgr *mgr; // Mongoose event manager
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// Internal state, user can use it but should not change it
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uint64_t now; // Current time
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uint64_t timer_1000ms; // 1000 ms timer: for DHCP and link state
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uint64_t lease_expire; // Lease expiration time
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uint8_t arp_cache[MIP_ARP_CS]; // Each entry is 12 bytes
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uint16_t eport; // Next ephemeral port
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uint16_t dropped; // Number of dropped frames
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uint8_t state; // Current state
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#define MIP_STATE_DOWN 0 // Interface is down
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#define MIP_STATE_UP 1 // Interface is up
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#define MIP_STATE_READY 2 // Interface is up and has IP
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struct queue queue; // Receive queue
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};
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void mip_init(struct mg_mgr *, struct mip_if *);
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extern struct mip_driver mip_driver_stm32;
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extern struct mip_driver mip_driver_enc28j60;
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extern struct mip_driver mip_driver_w5500;
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extern struct mip_driver mip_driver_tm4c;
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// Drivers that require SPI, can use this SPI abstraction
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struct mip_spi {
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void *spi; // Opaque SPI bus descriptor
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void (*begin)(void *); // SPI begin: slave select low
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void (*end)(void *); // SPI end: slave select high
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uint8_t (*txn)(void *, uint8_t); // SPI transaction: write 1 byte, read reply
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};
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#ifdef MIP_QPROFILE
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enum {
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QP_IRQTRIGGERED = 0, // payload is number of interrupts so far
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QP_FRAMEPUSHED, // available space in the frame queue
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QP_FRAMEPOPPED, // available space in the frame queue
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QP_FRAMEDONE, // available space in the frame queue
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QP_FRAMEDROPPED, // number of dropped frames
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QP_QUEUEOVF // profiling queue is full, payload is number of frame drops
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};
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void qp_mark(unsigned int type, int len);
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void qp_log(void); // timestamp, type, payload
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void qp_init(void);
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#else
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#define qp_mark(a, b)
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#endif
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