help!nbspi do not work on esp8266arduino sdk

[DengJackNo1]

hello,bro,i am diy my espboy, When I was compiling the Arduino project, I found that nbSPI was not working.
gpio16 as reverse tft cs pin, when high level .cs pin is active.
gpio 12(the spi miso pin) as tft dc pin .high level as tft display data , low level as tft display data. i do not konw the reason.
maybe:

gpio 12 is spi miso pin,so nbspi do not work
2.nbspi spi speed is too fast
I hope to receive your assistance.
Here is my test code

// TFT_eSPI setup ST7735
#define TFT_MISO  PIN_D6  // D6 not connect,Automatically assigned with ESP8266 if not defined
#define TFT_MOSI  PIN_D7  // Automatically assigned with ESP8266 if not defined
#define TFT_SCLK  PIN_D5  // Automatically assigned with ESP8266 if not defined

//#define TFT_CS    -1  // Chip select control pin D8
#define TFT_DC    12  // Data Command control pin
#define TFT_RST   -1 

// nbspi setup
// Set an IO to measure timing
#define NBSPI_TDBG_IO 12
#define NBSPI_TDBG_HIGH GPOS = (1<<NBSPI_TDBG_IO) // 0.1 ?s
#define NBSPI_TDBG_LOW GPOC = (1<<NBSPI_TDBG_IO) // 0.1 ?s

#include <TFT_eSPI.h>
#include <SPI.h>
#include "nbSPI.h"
TFT_eSPI tft;
extern SPIClass spi;
uint8_t sBuffer[50][50];
void setup() {
  int i;
  Serial.begin(115200);
  Serial.println("hello 1");
  pinMode(16, OUTPUT);  // select
  digitalWrite(16, 1);  // cs active
  tft.begin();
  tft.fillScreen(TFT_RED);
  delay(1000);
  memset(sBuffer, 0xff, 2500);
  tft.setAddrWindow(10, 10, 50, 50);
  NBSPI_TDBG_HIGH;
  spi.transfer((uint8_t *)sBuffer, 2500);
  NBSPI_TDBG_LOW;
  memset(sBuffer, 0, 2500);
  while (nbSPI_isBusy())
    ;
  Serial.println("hello 1");
  NBSPI_TDBG_HIGH;
  //spi.transfer((uint8_t *)sBuffer, 2500);
  nbSPI_writeBytes((uint8_t *)sBuffer, 1600);
  NBSPI_TDBG_LOW;
  Serial.println("hello 2");
  while (nbSPI_isBusy()) {
    delayMicroseconds(2);
  };
  Serial.println("hello end3");
}

void loop() {
  delay(1000);
  // put your main code here, to run repeatedly:
}

[DengJackNo1]

hi
fortunately , i can use nbspi work on my diy espboy by change the nbSPI.h.
I Deleted " "NBSPI_TDBG_HIGH NBSPI_TDBG_LOW" in the function void nbSPI_writeBytes() and void nbSPI_ISR();
instead of
while (nbSPI_isBusy());
NBSPI_TDBG_HIGH;
nbSPI_writeBytes((uint8_t *)sBuffer, size);
while (nbSPI_isBusy()); // maybe delete to improve performance in espboy arduboy2 lib
NBSPI_TDBG_LOW;
it work well.
I think this will be helpful.