99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
#include "mcp2521_hardware_handle.hpp"
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#ifdef ESP_PLATFORM
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#include "mcp2521_hardware_esp.hpp"
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#include <string.h>
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MCP2521_Hardware_Handle_ESP::MCP2521_Hardware_Handle_ESP(
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spi_host_device_t spi_host,
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spi_bus_config_t *bus_config,
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gpio_num_t mosi,
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gpio_num_t miso,
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gpio_num_t sclk,
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gpio_num_t cs,
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gpio_num_t int_pin
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) {
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initPins(int_pin);
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initSPIBus(spi_host, mosi, miso, sclk, bus_config);
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this->spi_bus_config = bus_config;
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initSPIDevice(spi_host, cs);
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}
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MCP2521_Hardware_Handle_ESP::MCP2521_Hardware_Handle_ESP(
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spi_host_device_t spi_host,
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spi_bus_config_t *bus_config,
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gpio_num_t cs,
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gpio_num_t int_pin
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) {
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initPins(int_pin);
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this->spi_bus_config = bus_config;
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initSPIDevice(spi_host, cs);
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}
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MCP2521_Hardware_Handle_ESP::~MCP2521_Hardware_Handle_ESP() {
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}
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void MCP2521_Hardware_Handle_ESP::initPins(
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gpio_num_t int_pin
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) {
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gpio_config_t io_conf;
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io_conf.intr_type = GPIO_INTR_DISABLE;
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io_conf.mode = GPIO_MODE_INPUT;
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io_conf.pin_bit_mask = 1 << int_pin;
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io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
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io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
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gpio_config(&io_conf);
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}
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void MCP2521_Hardware_Handle_ESP::initSPIBus(
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spi_host_device_t spi_host,
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gpio_num_t mosi,
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gpio_num_t miso,
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gpio_num_t sclk,
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spi_bus_config_t *bus_config
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) {
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memset(bus_config, 0, sizeof(spi_bus_config_t));
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bus_config->mosi_io_num = mosi;
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bus_config->miso_io_num = miso;
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bus_config->sclk_io_num = sclk;
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bus_config->quadwp_io_num = -1;
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bus_config->quadhd_io_num = -1;
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bus_config->flags = SPICOMMON_BUSFLAG_MASTER;
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spi_bus_initialize(spi_host, bus_config, SPI_DMA_CH_AUTO);
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}
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void MCP2521_Hardware_Handle_ESP::initSPIDevice(
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spi_host_device_t spi_host,
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gpio_num_t cs
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) {
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memset(&this->spi_device_config, 0, sizeof(spi_device_interface_config_t));
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this->spi_device_config = {
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.command_bits = 8,
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.address_bits = 0,
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.dummy_bits = 0,
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.mode = 0,
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.duty_cycle_pos = 128,
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// cs_ena_pretrans = 0 and cs_ena_posttrans = 0 need to be set to zero, if not its not compatible with full-duplex mode
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// Learned this the hard way
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.cs_ena_pretrans = 0,
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.cs_ena_posttrans = 0,
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.clock_speed_hz = 10000,
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.spics_io_num = cs,
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.flags = SPI_DEVICE_NO_DUMMY,
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.queue_size = 5,
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};
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spi_bus_add_device(spi_host, &this->spi_device_config, &this->spi_device_handle);
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}
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spi_bus_config_t * MCP2521_Hardware_Handle_ESP::getSPI_bus_config() {
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return this->spi_bus_config;
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}
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#endif
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