diff --git a/softspi.c b/softspi.c
new file mode 100644
index 0000000..613ad5c
--- /dev/null
+++ b/softspi.c
@@ -0,0 +1,188 @@
+/**
+ * @file    softspi.c
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.12
+ * @brief   STM32 SoftSPI Library
+ */
+
+#include "softspi.h"
+
+SoftSPI_InitTypeDef config;
+
+uint8_t GPIOx_Pin_Init(GPIO_TypeDef *GPIOx, uint32_t Pin, uint32_t Mode, uint32_t Pull);
+
+HAL_StatusTypeDef SoftSPI_Init(SoftSPI_InitTypeDef *SoftSPI_Initure)
+{
+    config.SCLK_GPIO = SoftSPI_Initure->SCLK_GPIO;
+    config.SCLK_Pin = SoftSPI_Initure->SCLK_Pin;
+
+    if (!GPIOx_Pin_Init(config.SCLK_GPIO, config.SCLK_Pin, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL))
+        return HAL_ERROR;
+
+    config.MOSI_GPIO = SoftSPI_Initure->MOSI_GPIO;
+    config.MOSI_Pin = SoftSPI_Initure->MOSI_Pin;
+
+    if (!GPIOx_Pin_Init(config.MOSI_GPIO, config.MOSI_Pin, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL))
+        return HAL_ERROR;
+
+    config.MISO_GPIO = SoftSPI_Initure->MISO_GPIO;
+    config.MISO_Pin = SoftSPI_Initure->MISO_Pin;
+
+    if (!GPIOx_Pin_Init(config.MISO_GPIO, config.MISO_Pin, GPIO_MODE_INPUT, GPIO_PULLUP))
+        return HAL_ERROR;
+
+    config.SS_GPIO = SoftSPI_Initure->SS_GPIO;
+    config.SS_Pin = SoftSPI_Initure->SS_Pin;
+
+    if (!GPIOx_Pin_Init(config.SS_GPIO, config.SS_Pin, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL))
+        return HAL_ERROR;
+
+    config.Delay_Time = SoftSPI_Initure->Delay_Time;
+
+    return HAL_OK;
+}
+
+uint8_t SoftSPI_WriteRead(uint8_t byte)
+{
+    uint8_t data = 0;
+    uint8_t i;
+
+    // Select Device
+    HAL_GPIO_WritePin(config.SS_GPIO, config.SS_Pin, GPIO_PIN_RESET);
+
+    for (i = 0; i < 8; i++)
+    {
+        HAL_GPIO_WritePin(config.SCLK_GPIO, config.SCLK_Pin, GPIO_PIN_RESET);
+        SoftSPI_Delay_us(config.Delay_Time);
+
+        if (byte & 0x80)
+            HAL_GPIO_WritePin(config.MOSI_GPIO, config.MOSI_Pin, GPIO_PIN_SET);
+        else
+            HAL_GPIO_WritePin(config.MOSI_GPIO, config.MOSI_Pin, GPIO_PIN_RESET);
+
+        SoftSPI_Delay_us(config.Delay_Time);
+
+        byte <<= 1;
+        HAL_GPIO_WritePin(config.SCLK_GPIO, config.SCLK_Pin, GPIO_PIN_SET);
+        SoftSPI_Delay_us(config.Delay_Time);
+
+        data <<= 1;
+        if (HAL_GPIO_ReadPin(config.MISO_GPIO, config.MISO_Pin) == GPIO_PIN_SET)
+            data |= 0x01;
+
+        SoftSPI_Delay_us(config.Delay_Time);
+    }
+
+    // Unselect Device
+    HAL_GPIO_WritePin(config.SS_GPIO, config.SS_Pin, GPIO_PIN_SET);
+
+    return data;
+}
+
+void SoftSPI_WriteReadBuff(uint8_t *pWrite, uint8_t *pRead, uint32_t len)
+{
+    uint8_t data;
+    uint8_t byte;
+    uint8_t i, j;
+
+    // Select Device
+    HAL_GPIO_WritePin(config.SS_GPIO, config.SS_Pin, GPIO_PIN_RESET);
+
+    for (j = 0; j < len; j++)
+    {
+        data = 0;
+        byte = pWrite[j];
+
+        for (i = 0; i < 8; i++)
+        {
+            HAL_GPIO_WritePin(config.SCLK_GPIO, config.SCLK_Pin, GPIO_PIN_RESET);
+            SoftSPI_Delay_us(config.Delay_Time);
+
+            if (byte & 0x80)
+                HAL_GPIO_WritePin(config.MOSI_GPIO, config.MOSI_Pin, GPIO_PIN_SET);
+            else
+                HAL_GPIO_WritePin(config.MOSI_GPIO, config.MOSI_Pin, GPIO_PIN_RESET);
+
+            SoftSPI_Delay_us(config.Delay_Time);
+
+            byte <<= 1;
+            HAL_GPIO_WritePin(config.SCLK_GPIO, config.SCLK_Pin, GPIO_PIN_SET);
+            SoftSPI_Delay_us(config.Delay_Time);
+
+            data <<= 1;
+            if (HAL_GPIO_ReadPin(config.MISO_GPIO, config.MISO_Pin) == GPIO_PIN_SET)
+                data |= 0x01;
+
+            SoftSPI_Delay_us(config.Delay_Time);
+        }
+
+        pRead[j] = data;
+    }
+
+    // Unselect Device
+    HAL_GPIO_WritePin(config.SS_GPIO, config.SS_Pin, GPIO_PIN_SET);
+}
+
+uint8_t GPIOx_Pin_Init(GPIO_TypeDef *GPIOx, uint32_t Pin, uint32_t Mode, uint32_t Pull)
+{
+    switch ((uint32_t)(GPIOx))
+    {
+    case (uint32_t)GPIOA:
+    {
+        GPIO_InitTypeDef GPIO_Initure;
+        __HAL_RCC_GPIOA_CLK_ENABLE();
+
+        GPIO_Initure.Pin = Pin;
+        GPIO_Initure.Mode = Mode;
+        GPIO_Initure.Pull = Pull;
+        GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;
+        HAL_GPIO_Init(GPIOA, &GPIO_Initure);
+    }
+    break;
+
+    case (uint32_t)GPIOB:
+    {
+        GPIO_InitTypeDef GPIO_Initure;
+        __HAL_RCC_GPIOB_CLK_ENABLE();
+
+        GPIO_Initure.Pin = Pin;
+        GPIO_Initure.Mode = Mode;
+        GPIO_Initure.Pull = Pull;
+        GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;
+        HAL_GPIO_Init(GPIOB, &GPIO_Initure);
+    }
+    break;
+
+    case (uint32_t)GPIOC:
+    {
+        GPIO_InitTypeDef GPIO_Initure;
+        __HAL_RCC_GPIOC_CLK_ENABLE();
+
+        GPIO_Initure.Pin = Pin;
+        GPIO_Initure.Mode = Mode;
+        GPIO_Initure.Pull = Pull;
+        GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;
+        HAL_GPIO_Init(GPIOC, &GPIO_Initure);
+    }
+    break;
+
+    case (uint32_t)GPIOD:
+    {
+        GPIO_InitTypeDef GPIO_Initure;
+        __HAL_RCC_GPIOD_CLK_ENABLE();
+
+        GPIO_Initure.Pin = Pin;
+        GPIO_Initure.Mode = Mode;
+        GPIO_Initure.Pull = Pull;
+        GPIO_Initure.Speed = GPIO_SPEED_FREQ_HIGH;
+        HAL_GPIO_Init(GPIOD, &GPIO_Initure);
+    }
+    break;
+
+    default:
+        return 0;
+    }
+
+    return 1;
+}
diff --git a/softspi.h b/softspi.h
new file mode 100644
index 0000000..8878b5a
--- /dev/null
+++ b/softspi.h
@@ -0,0 +1,40 @@
+/**
+ * @file    softspi.h
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.12
+ * @brief   STM32 SoftSPI Library
+ */
+
+#ifndef __SOFTSPI_H
+#define __SOFTSPI_H
+
+#include "softspi_conf.h"
+
+/**
+  * @brief  SoftSPI Configuration Structure definition
+  */
+typedef struct
+{
+    GPIO_TypeDef *SCLK_GPIO;
+    uint32_t SCLK_Pin;
+
+    GPIO_TypeDef *MOSI_GPIO;
+    uint32_t MOSI_Pin;
+
+    GPIO_TypeDef *MISO_GPIO;
+    uint32_t MISO_Pin;
+
+    GPIO_TypeDef *SS_GPIO;
+    uint32_t SS_Pin;
+
+    uint32_t Delay_Time;
+} SoftSPI_InitTypeDef;
+
+HAL_StatusTypeDef SoftSPI_Init(SoftSPI_InitTypeDef *SoftSPI_Initure);
+
+uint8_t SoftSPI_WriteRead(uint8_t byte);
+
+void SoftSPI_WriteReadBuff(uint8_t *pWrite, uint8_t *pRead, uint32_t len);
+
+#endif
diff --git a/softspi_conf.h b/softspi_conf.h
new file mode 100644
index 0000000..d2ce8c5
--- /dev/null
+++ b/softspi_conf.h
@@ -0,0 +1,22 @@
+/**
+ * @file    softspi_conf.h
+ * @author  Myth
+ * @version 0.1
+ * @date    2021.10.12
+ * @brief   STM32 SoftSPI Library Config File
+ */
+
+#ifndef __SOFTSPI_CONF_H
+#define __SOFTSPI_CONF_H
+
+// Set your HAL Library here.
+
+#include "stm32f1xx_hal.h"
+
+// Set your owm Delay_us function here.
+
+#include "systick.h"
+
+#define SoftSPI_Delay_us(__time__) Delay_us(__time__)
+
+#endif