text: /*
   Tests for the spi_slave device driver
  */
  
  #include <string.h>
  #include "unity.h"
  #include "driver/spi_master.h"
  #include "driver/spi_slave.h"
  #include "driver/gpio.h"
  #include "esp_log.h"
  #include "sdkconfig.h"
  #include "test/test_common_spi.h"
  
  #ifndef CONFIG_ESP32_SPIRAM_SUPPORT
  //This test should be removed once the timing test is merged.
  
  
  #define MASTER_SEND {0x93, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0, 0xaa, 0xcc, 0xff, 0xee, 0x55, 0x77, 0x88, 0x43}
  #define SLAVE_SEND { 0xaa, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10, 0x13, 0x57, 0x9b, 0xdf, 0x24, 0x68, 0xac, 0xe0 }
  
  static inline void int_connect( uint32_t gpio, uint32_t sigo, uint32_t sigi )
  {
      gpio_matrix_out( gpio, sigo, false, false );
      gpio_matrix_in( gpio, sigi, false );
  }
  
  static void master_init_nodma( spi_device_handle_t* spi)
  {
      esp_err_t ret;
      spi_bus_config_t buscfg={
          .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
      };
      spi_device_interface_config_t devcfg={
          .clock_speed_hz=4*1000*1000,            //currently only up to 4MHz for internel connect
          .mode=0,                                //SPI mode 0
          .spics_io_num=PIN_NUM_CS,               //CS pin
          .queue_size=7,                          //We want to be able to queue 7 transactions at a time
          .pre_cb=NULL,
          .cs_ena_posttrans=5,
          .cs_ena_pretrans=1,
      };
      //Initialize the SPI bus
      ret=spi_bus_initialize(TEST_SPI_HOST, &buscfg, 0);
      TEST_ASSERT(ret==ESP_OK);
      //Attach the LCD to the SPI bus
      ret=spi_bus_add_device(TEST_SPI_HOST, &devcfg, spi);
      TEST_ASSERT(ret==ESP_OK);
  }
  
  static void slave_init()
  {
      //Configuration for the SPI bus
      spi_bus_config_t buscfg={
          .mosi_io_num=PIN_NUM_MOSI,
          .miso_io_num=PIN_NUM_MISO,
          .sclk_io_num=PIN_NUM_CLK
      };
      //Configuration for the SPI slave interface
      spi_slave_interface_config_t slvcfg={
          .mode=0,
          .spics_io_num=PIN_NUM_CS,
          .queue_size=3,
          .flags=0,
      };
      //Enable pull-ups on SPI lines so we don't detect rogue pulses when no master is connected.
      gpio_set_pull_mode(PIN_NUM_MOSI, GPIO_PULLUP_ONLY);
      gpio_set_pull_mode(PIN_NUM_CLK, GPIO_PULLUP_ONLY);
      gpio_set_pull_mode(PIN_NUM_CS, GPIO_PULLUP_ONLY);
      //Initialize SPI slave interface
      TEST_ESP_OK( spi_slave_initialize(TEST_SLAVE_HOST, &buscfg, &slvcfg, 2) );
  }
  
  TEST_CASE("test slave send unaligned","[spi]")
  {
      WORD_ALIGNED_ATTR uint8_t master_txbuf[320]=MASTER_SEND;
      WORD_ALIGNED_ATTR uint8_t master_rxbuf[320];
      WORD_ALIGNED_ATTR uint8_t slave_txbuf[320]=SLAVE_SEND;
      WORD_ALIGNED_ATTR uint8_t slave_rxbuf[320];
  
      spi_device_handle_t spi;
      //initial master
      master_init_nodma( &spi );
      //initial slave
      slave_init();
  
      //do internal connection
      int_connect( PIN_NUM_MOSI,  HSPID_OUT_IDX,   VSPIQ_IN_IDX );
      int_connect( PIN_NUM_MISO,  VSPIQ_OUT_IDX,   HSPID_IN_IDX );
      int_connect( PIN_NUM_CS,    HSPICS0_OUT_IDX, VSPICS0_IN_IDX );
      int_connect( PIN_NUM_CLK,   HSPICLK_OUT_IDX, VSPICLK_IN_IDX );
  
      for ( int i = 0; i < 4; i ++ ) {
          //slave send
          spi_slave_transaction_t slave_t;
          spi_slave_transaction_t* out;
          memset(&slave_t, 0, sizeof(spi_slave_transaction_t));
          slave_t.length=8*32;
          slave_t.tx_buffer=slave_txbuf+i;
          slave_t.rx_buffer=slave_rxbuf;
          TEST_ESP_OK(spi_slave_queue_trans(TEST_SLAVE_HOST, &slave_t, portMAX_DELAY));
  
          //send
          spi_transaction_t t = {};
          t.length = 32*(i+1);
          if ( t.length != 0 ) {
              t.tx_buffer = master_txbuf+i;
              t.rx_buffer = master_rxbuf+i;
          }
          spi_device_transmit( spi, (spi_transaction_t*)&t );
  
          //wait for end
          TEST_ESP_OK(spi_slave_get_trans_result(TEST_SLAVE_HOST, &out, portMAX_DELAY));
  
          //show result
          ESP_LOGI(SLAVE_TAG, "trans_len: %d", slave_t.trans_len);
          ESP_LOG_BUFFER_HEX( "master tx", t.tx_buffer, t.length/8 );
          ESP_LOG_BUFFER_HEX( "master rx", t.rx_buffer, t.length/8 );
          ESP_LOG_BUFFER_HEX( "slave tx", slave_t.tx_buffer, (slave_t.trans_len+7)/8);
          ESP_LOG_BUFFER_HEX( "slave rx", slave_t.rx_buffer, (slave_t.trans_len+7)/8);
  
          TEST_ASSERT_EQUAL_HEX8_ARRAY( t.tx_buffer, slave_t.rx_buffer, t.length/8 );
          TEST_ASSERT_EQUAL_HEX8_ARRAY( slave_t.tx_buffer, t.rx_buffer, t.length/8 );
  
          TEST_ASSERT_EQUAL( t.length, slave_t.trans_len );
  
          //clean
          memset( master_rxbuf, 0x66, sizeof(master_rxbuf));
          memset( slave_rxbuf, 0x66, sizeof(slave_rxbuf));
      }
  
      TEST_ASSERT(spi_slave_free(TEST_SLAVE_HOST) == ESP_OK);
  
      TEST_ASSERT(spi_bus_remove_device(spi) == ESP_OK);
      TEST_ASSERT(spi_bus_free(TEST_SPI_HOST) == ESP_OK);
  
      ESP_LOGI(MASTER_TAG, "test passed.");
  }
  
  #endif // !CONFIG_ESP32_SPIRAM_SUPPORT
  