Matrix Orbital Corp

Hello, I am using `https:// github.com/matrixorbital/eve2-library` to drive the LCD screen. The QSPI protocol connection I use will be connected to the BT817. It was changed to QSPI, but it didn't seem to play any role, and still could not light up the screen:

`` `c
/*
* hw_api.c
*
* Created on: Mar 4, 2020
* Author: ray
*/

#include "hw_api.h"
#include "main.h"
extern QSPI_HANDLETYPEF HQSPI1;

extern void mx_spi1_init ();
void Hal_spi_enable (VOID)
{{
Hal_gpio_writepin (GPIOA, GPIO_PIN_2, 1);
}

void Hal_SPI_DISable (VOID)
{{
Hal_gpio_writepin (GPIOA, GPIO_PIN_2, 0);
}

volatile int Lastresult = 0;
void Hal_SPI_WRITEBUFFER (UINT8_T *Buffer, UINT32_T Length)
{{
Hal_spi_enable ();
hqspi1.instance-> dlr = length-; // Configure data length
volatile int result = Hal_qspi_transmit (& hqspi1, buffer, 1000); // Send data

Hal_spi_disable ();
}

void Hal_SPI_READBUFFER (UINT8_T *Buffer, UINT32_T LENGTH)
{{
// Eveires One Dummy Read/Write Before Actual Data Can Be Read
Buffer [0] = 0;
hqspi1.instance-> dlr = length-1;
volatile int result = Hal_qspi_transmit (& hqspi1, buffer, 1000);
HAL_QSPI_RECEIVE (& HQSPI1, Buffer, 1000);
}

UINT8_T HAL_SPI_WRITE (UINT8_T DATA)
{{
hqspi1.instance-> dlr = data-1; // Configure data length
If (HAL_QSPI_TRANSMIT (& HQSPI1, & Data, 1000) == Hal_ok) Return 0; // Send data
else Return 1;
}

void Hal_eve_reset_hw (void)
{{
Hal_gpio_writepin (EVE_PD_GPIO_PORT, EVE_PD_PIN, 0);
HAL_GPIO_WRITEPIN (GPIOA, GPIO_PIN_2, 0); // CS PIN

Hal_delay (50);
Hal_gpio_writepin (EVE_PD_GPIO_PORT, EVE_PD_PIN, 1);
Hal_gpio_writepin (GPIOA, GPIO_PIN_2, 1);
Hal_delay (100);
}
`` `

Can you help me see where there is a problem? My engineering file is generated by CubemX. If I need the engineering source file, I will attach it again.


I hope you can help me look at the code, or provide a QSPI version. I have had a headache for several days. I am not familiar with QSPI. The content of the relevant code on the Internet is very small. I hope to get your help. Thank you very much! Intersection

Hello,

Thank you for posting on the forum.
Can I please get the serial number on the EVE display? I want to check the hardware capability to do QSPI.

Thank you,
Raquel

Is the serial number on the EVE display you mentioned the number on the BT817 chip? If so, the number is "KM21G BT817Q 2208-B". I hope to get your help as soon as possible. I don't know how to perform QSPI read and write.

Hello,

Serial number can be found on the back of the display, small clear sticker.

Thank you,
Raquel