mirror of
https://github.com/esphome/esphome.git
synced 2024-12-12 00:14:53 +01:00
112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
#pragma once
|
|
|
|
#include "esphome/components/canbus/canbus.h"
|
|
#include "esphome/components/spi/spi.h"
|
|
#include "esphome/core/component.h"
|
|
#include "mcp2515_defs.h"
|
|
|
|
namespace esphome {
|
|
namespace mcp2515 {
|
|
static const uint32_t SPI_CLOCK = 10000000; // 10MHz
|
|
|
|
static const int N_TXBUFFERS = 3;
|
|
static const int N_RXBUFFERS = 2;
|
|
enum CanClock { MCP_20MHZ, MCP_16MHZ, MCP_8MHZ };
|
|
enum MASK { MASK0, MASK1 };
|
|
enum RXF { RXF0 = 0, RXF1 = 1, RXF2 = 2, RXF3 = 3, RXF4 = 4, RXF5 = 5 };
|
|
enum RXBn { RXB0 = 0, RXB1 = 1 };
|
|
enum TXBn { TXB0 = 0, TXB1 = 1, TXB2 = 2 };
|
|
|
|
enum CanClkOut {
|
|
CLKOUT_DISABLE = -1,
|
|
CLKOUT_DIV1 = 0x0,
|
|
CLKOUT_DIV2 = 0x1,
|
|
CLKOUT_DIV4 = 0x2,
|
|
CLKOUT_DIV8 = 0x3,
|
|
};
|
|
|
|
enum CANINTF : uint8_t {
|
|
CANINTF_RX0IF = 0x01,
|
|
CANINTF_RX1IF = 0x02,
|
|
CANINTF_TX0IF = 0x04,
|
|
CANINTF_TX1IF = 0x08,
|
|
CANINTF_TX2IF = 0x10,
|
|
CANINTF_ERRIF = 0x20,
|
|
CANINTF_WAKIF = 0x40,
|
|
CANINTF_MERRF = 0x80
|
|
};
|
|
|
|
enum EFLG : uint8_t {
|
|
EFLG_RX1OVR = (1 << 7),
|
|
EFLG_RX0OVR = (1 << 6),
|
|
EFLG_TXBO = (1 << 5),
|
|
EFLG_TXEP = (1 << 4),
|
|
EFLG_RXEP = (1 << 3),
|
|
EFLG_TXWAR = (1 << 2),
|
|
EFLG_RXWAR = (1 << 1),
|
|
EFLG_EWARN = (1 << 0)
|
|
};
|
|
|
|
enum STAT : uint8_t { STAT_RX0IF = (1 << 0), STAT_RX1IF = (1 << 1) };
|
|
|
|
static const uint8_t STAT_RXIF_MASK = STAT_RX0IF | STAT_RX1IF;
|
|
static const uint8_t EFLG_ERRORMASK = EFLG_RX1OVR | EFLG_RX0OVR | EFLG_TXBO | EFLG_TXEP | EFLG_RXEP;
|
|
|
|
class MCP2515 : public canbus::Canbus,
|
|
public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
|
|
spi::DATA_RATE_8MHZ> {
|
|
public:
|
|
MCP2515(){};
|
|
void set_mcp_clock(CanClock clock) { this->mcp_clock_ = clock; };
|
|
void set_mcp_mode(const CanctrlReqopMode mode) { this->mcp_mode_ = mode; }
|
|
static const struct TxBnRegs {
|
|
REGISTER CTRL;
|
|
REGISTER SIDH;
|
|
REGISTER DATA;
|
|
} TXB[N_TXBUFFERS];
|
|
|
|
static const struct RxBnRegs {
|
|
REGISTER CTRL;
|
|
REGISTER SIDH;
|
|
REGISTER DATA;
|
|
CANINTF CANINTF_RXnIF;
|
|
} RXB[N_RXBUFFERS];
|
|
|
|
protected:
|
|
CanClock mcp_clock_{MCP_8MHZ};
|
|
CanctrlReqopMode mcp_mode_ = CANCTRL_REQOP_NORMAL;
|
|
bool setup_internal() override;
|
|
canbus::Error set_mode_(CanctrlReqopMode mode);
|
|
|
|
uint8_t read_register_(REGISTER reg);
|
|
void read_registers_(REGISTER reg, uint8_t values[], uint8_t n);
|
|
void set_register_(REGISTER reg, uint8_t value);
|
|
void set_registers_(REGISTER reg, uint8_t values[], uint8_t n);
|
|
void modify_register_(REGISTER reg, uint8_t mask, uint8_t data);
|
|
|
|
void prepare_id_(uint8_t *buffer, bool extended, uint32_t id);
|
|
canbus::Error reset_();
|
|
canbus::Error set_clk_out_(CanClkOut divisor);
|
|
canbus::Error set_bitrate_(canbus::CanSpeed can_speed);
|
|
canbus::Error set_bitrate_(canbus::CanSpeed can_speed, CanClock can_clock);
|
|
canbus::Error set_filter_mask_(MASK mask, bool extended, uint32_t ul_data);
|
|
canbus::Error set_filter_(RXF num, bool extended, uint32_t ul_data);
|
|
canbus::Error send_message_(TXBn txbn, struct canbus::CanFrame *frame);
|
|
canbus::Error send_message(struct canbus::CanFrame *frame) override;
|
|
canbus::Error read_message_(RXBn rxbn, struct canbus::CanFrame *frame);
|
|
canbus::Error read_message(struct canbus::CanFrame *frame) override;
|
|
bool check_receive_();
|
|
bool check_error_();
|
|
uint8_t get_error_flags_();
|
|
void clear_rx_n_ovr_flags_();
|
|
uint8_t get_int_();
|
|
uint8_t get_int_mask_();
|
|
void clear_int_();
|
|
void clear_tx_int_();
|
|
uint8_t get_status_();
|
|
void clear_rx_n_ovr_();
|
|
void clear_merr_();
|
|
void clear_errif_();
|
|
};
|
|
} // namespace mcp2515
|
|
} // namespace esphome
|