OVMS3-idf/components/driver/test/include/test/test_common_spi.h

#ifndef _TEST_COMMON_SPI_H_
#define _TEST_COMMON_SPI_H_

#include <esp_types.h>
#include "driver/spi_master.h"
#include "freertos/FreeRTOS.h"
#include "freertos/ringbuf.h"
#include "freertos/task.h"
#include "unity.h"
#include "test_utils.h"
#include <string.h>
#include "param_test.h"

// All the tests using the header should use this definition as much as possible,
// so that the working host can be changed easily in the future.
#define TEST_SPI_HOST   HSPI_HOST
#define TEST_SLAVE_HOST VSPI_HOST

#define FUNC_SPI    1
#define FUNC_GPIO   2

//Delay information
#define ESP_SPI_SLAVE_TV    (12.5*3.5)
#define GPIO_DELAY          (12.5*2)
#define WIRE_DELAY        12.5
#define TV_INT_CONNECT_GPIO     (ESP_SPI_SLAVE_TV+GPIO_DELAY)
#define TV_INT_CONNECT          (ESP_SPI_SLAVE_TV)
//when connecting to another board, the delay is usually increased by 12.5ns
#define TV_WITH_ESP_SLAVE_GPIO  (TV_INT_CONNECT_GPIO+WIRE_DELAY)
#define TV_WITH_ESP_SLAVE       (TV_INT_CONNECT+WIRE_DELAY)

//currently ESP32 slave only supports up to 20MHz, but 40MHz on the same board
#define ESP_SPI_SLAVE_MAX_FREQ      SPI_MASTER_FREQ_20M
#define ESP_SPI_SLAVE_MAX_FREQ_SYNC SPI_MASTER_FREQ_40M

#define MAX_TEST_SIZE   16  ///< in this test we run several transactions, this is the maximum trans that can be run
#define PSET_NAME_LEN   30  ///< length of each param set name

//test low frequency, high frequency until freq limit for worst case (both GPIO)
#define TEST_FREQ_DEFAULT(){\
        1*1000*1000,            \
        SPI_MASTER_FREQ_8M ,    \
        SPI_MASTER_FREQ_9M ,    \
        SPI_MASTER_FREQ_10M,    \
        SPI_MASTER_FREQ_11M,    \
        SPI_MASTER_FREQ_13M,    \
        SPI_MASTER_FREQ_16M,    \
        SPI_MASTER_FREQ_20M,    \
        SPI_MASTER_FREQ_26M,    \
        SPI_MASTER_FREQ_40M,    \
        SPI_MASTER_FREQ_80M,    \
        0,\
    }

#define PIN_NUM_MISO    HSPI_IOMUX_PIN_NUM_MISO
#define PIN_NUM_MOSI    HSPI_IOMUX_PIN_NUM_MOSI
#define PIN_NUM_CLK     HSPI_IOMUX_PIN_NUM_CLK
#define PIN_NUM_CS      HSPI_IOMUX_PIN_NUM_CS

//default bus config for tests
#define SPI_BUS_TEST_DEFAULT_CONFIG() {\
        .miso_io_num=PIN_NUM_MISO, \
        .mosi_io_num=PIN_NUM_MOSI,\
        .sclk_io_num=PIN_NUM_CLK,\
        .quadwp_io_num=-1,\
        .quadhd_io_num=-1\
    }

//default device config for master devices
#define SPI_DEVICE_TEST_DEFAULT_CONFIG()    {\
        .clock_speed_hz=10*1000*1000,\
        .mode=0,\
        .spics_io_num=PIN_NUM_CS,\
        .queue_size=16,\
        .pre_cb=NULL,  \
        .cs_ena_pretrans = 0,\
        .cs_ena_posttrans = 0,\
        .input_delay_ns = 62.5,\
    }

//default device config for slave devices
#define SPI_SLAVE_TEST_DEFAULT_CONFIG() {\
        .mode=0,\
        .spics_io_num=PIN_NUM_CS,\
        .queue_size=3,\
        .flags=0,\
    }

typedef enum {
    FULL_DUPLEX = 0,
    HALF_DUPLEX_MISO = 1,
    HALF_DUPLEX_MOSI = 2,
} spi_dup_t;

/*-------- slave task related stuff -----------*/
typedef struct {
    uint32_t len;
    uint8_t* tx_start;
    uint8_t data[1];
} slave_rxdata_t;

typedef struct {
    uint32_t len;
    const uint8_t *start;
} slave_txdata_t;

typedef struct {
    spi_host_device_t spi;
    RingbufHandle_t data_received;
    QueueHandle_t data_to_send;
} spi_slave_task_context_t;

// test data for master and slave
extern uint8_t spitest_master_send[];
extern uint8_t spitest_slave_send[];

//tags for master and slave app
extern const char MASTER_TAG[];
extern const char SLAVE_TAG[];

//parameter set definition
typedef struct {
    const char pset_name[PSET_NAME_LEN];
    /*The test work till the frequency below,
     *set the frequency to higher and remove checks in the driver to know how fast the system can run.
     */
    const int *freq_list;     // list of tested frequency, terminated by 0
    int freq_limit;     //freq larger (not equal) than this will be ignored
    spi_dup_t dup;
    int mode;
    bool length_aligned;
    int test_size;

    int master_limit;   // the master disable dummy bits and discard readings over this freq
    bool master_iomux;
    int master_dma_chan;

    bool slave_iomux;
    int slave_dma_chan;
    int slave_tv_ns;
    bool slave_unaligned_addr;
} spitest_param_set_t;

//context definition for the parameterized test
typedef struct {
    uint8_t master_rxbuf[480];
    spi_transaction_t master_trans[MAX_TEST_SIZE];
    TaskHandle_t handle_slave;
    spi_slave_task_context_t slave_context;
    slave_txdata_t slave_trans[MAX_TEST_SIZE];
} spitest_context_t;

// fill default value of spitest_param_set_t
void spitest_def_param(void* arg);

// functions for slave task
esp_err_t init_slave_context(spi_slave_task_context_t *context);
void deinit_slave_context(spi_slave_task_context_t *context);
void spitest_slave_task(void* arg);

//called by slave, pull-up all pins used by slave
void slave_pull_up(const spi_bus_config_t* cfg, int spics_io_num);

// to access data of pre-defined transactions.
void spitest_init_transactions(const spitest_param_set_t *cfg, spitest_context_t* context);

// print data from a transaction
void spitest_master_print_data(spi_transaction_t *t, int rxlength);
void spitest_slave_print_data(slave_rxdata_t *t, bool print_rxdata);
// Check whether master and slave data match
esp_err_t spitest_check_data(int len, spi_transaction_t *master_t, slave_rxdata_t *slave_t, bool check_master_data, bool check_slave_len, bool check_slave_data);

static inline int get_trans_len(spi_dup_t dup, spi_transaction_t *master_t)
{
    if (dup!=HALF_DUPLEX_MISO) {
        return master_t->length;
    } else {
        return master_t->rxlength;
    }
}
//remove device from bus and free the bus
void master_free_device_bus(spi_device_handle_t spi);

//use this function to fix the output source when assign multiple funcitons to a same pin
void spitest_gpio_output_sel(uint32_t gpio_num, int func, uint32_t signal_idx);

#endif  //_TEST_COMMON_SPI_H_