w801 如何实现 psram 扩容?

Hello! I observed this behavior when I bought a batch of defective chips.
After installing working chips on the Air103 board, everything works well

Code for testing:

#include "Arduino. h"
// Tested on Air103 board with APS6404L-3SQR-SN chip
PSRAM_HandleTypeDef hpsram; 
static void PSRAM_Init (void) ; 
static uint8_t *psram_buf =  (uint8_t *) PSRAM_ADDR_START; 
void setup () 
{
  Serial. begin (115200) ; 
  PSRAM_Init () ; 
}
void loop () 
{
  uint8_t temp[100]; 
  int i = 0; 
  memset (psram_buf,  0,  100) ; 
  for (i = 0;  i  " 100;  i++) 
  {
    Serial. printf ("%x ",  psram_buf[i]) ; 
  }
  Serial. printf ("\r\n") ; 
  for (i = 0;  i  " 100;  i++) 
  {
    temp[i] = i % 256; 
  }

  memcpy (psram_buf,  temp,  100) ; 
  for (i = 0;  i  " 100;  i++) 
  {
    Serial. printf ("%x ",  psram_buf[i]) ; 
  }
  Serial. printf ("\r\n") ; 
  delay (1000) ; 
}

static void PSRAM_Init (void) 
{
  __HAL_RCC_PSRAM_CLK_ENABLE () ; 
  __HAL_RCC_GPIO_CLK_ENABLE () ; 
  // For Air103
  __HAL_AFIO_REMAP_PSRAM_CS (GPIOB,  GPIO_PIN_27) ; 
  __HAL_AFIO_REMAP_PSRAM_CLK (GPIOA,  GPIO_PIN_15) ; 
  __HAL_AFIO_REMAP_PSRAM_D0 (GPIOB,  GPIO_PIN_2) ; 
  __HAL_AFIO_REMAP_PSRAM_D1 (GPIOB,  GPIO_PIN_3) ; 
  __HAL_AFIO_REMAP_PSRAM_D2 (GPIOB,  GPIO_PIN_4) ; 
  __HAL_AFIO_REMAP_PSRAM_D3 (GPIOB,  GPIO_PIN_5) ; 
  hpsram. Instance = PSRAM; 
  hpsram. Init. Div = 3; 
  hpsram. Init. Mode = PSRAM_MODE_QSPI; 
  if  (HAL_PSRAM_Init (&hpsram)  ! = HAL_OK) 
  {
    Serial. printf ("Init error. . . \r\n") ; 
  }
}

This code is based on HAL 0. 6. 0 and will work on w801