diff --git a/SpiPorts.c b/SpiPorts.c
index 1420fb0..1a03b25 100644
--- a/SpiPorts.c
+++ b/SpiPorts.c
@@ -62,10 +62,76 @@ static tSpiPortArtery vSpiPort_InitSPI2(tGpioPin *chipSelect) {
 
 }
 
+
+
+
+
+static void vSpiPort_InitSPI3RxTxPin() {
+    gpio_init_type GPIO_InitStruct;
+
+    gpio_default_para_init(&GPIO_InitStruct);
+
+    //// spi3 sck pin
+    GPIO_InitStruct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
+    GPIO_InitStruct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
+    GPIO_InitStruct.gpio_pull = GPIO_PULL_NONE;
+    GPIO_InitStruct.gpio_mode = GPIO_MODE_MUX;
+    GPIO_InitStruct.gpio_pins = GPIO_PINS_10;
+    gpio_init(GPIOC, &GPIO_InitStruct);
+    gpio_pin_mux_config(GPIOC, GPIO_PINS_SOURCE10, GPIO_MUX_6);
+
+    //// spi3 mosi pin
+    GPIO_InitStruct.gpio_pull = GPIO_PULL_NONE;
+    GPIO_InitStruct.gpio_pins = GPIO_PINS_0;
+    gpio_init(GPIOB, &GPIO_InitStruct);
+    gpio_pin_mux_config(GPIOB, GPIO_PINS_SOURCE0, GPIO_MUX_7);
+}
+
+static tSpiPortArtery vSpiPort_InitSPI3(tGpioPin *chipSelect) {
+    vSpiPort_InitSPI3RxTxPin();
+    return vSpiPortInitName(SPI3, SPI_FRAME_8BIT, SPI_MCLK_DIV_32, SPI_CLOCK_POLARITY_LOW, SPI_CLOCK_PHASE_1EDGE, chipSelect);
+
+}
+
+
+static void vSpiPort_InitSPI4RxTxPin() {
+    gpio_init_type GPIO_InitStruct;
+
+    gpio_default_para_init(&GPIO_InitStruct);
+
+    //// spi4 sck pin
+    GPIO_InitStruct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
+    GPIO_InitStruct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
+    GPIO_InitStruct.gpio_pull = GPIO_PULL_NONE;
+    GPIO_InitStruct.gpio_mode = GPIO_MODE_MUX;
+    GPIO_InitStruct.gpio_pins = GPIO_PINS_2;
+    gpio_init(GPIOE, &GPIO_InitStruct);
+    gpio_pin_mux_config(GPIOE, GPIO_PINS_SOURCE2, GPIO_MUX_5);
+
+    //// spi4 mosi pin
+    GPIO_InitStruct.gpio_pull = GPIO_PULL_NONE;
+    GPIO_InitStruct.gpio_pins = GPIO_PINS_6;
+    gpio_init(GPIOE, &GPIO_InitStruct);
+    gpio_pin_mux_config(GPIOE, GPIO_PINS_SOURCE6, GPIO_MUX_5);
+}
+
+static tSpiPortArtery vSpiPort_InitSPI4(tGpioPin *chipSelect) {
+    vSpiPort_InitSPI4RxTxPin();
+    return vSpiPortInitName(SPI4, SPI_FRAME_8BIT, SPI_MCLK_DIV_32, SPI_CLOCK_POLARITY_LOW, SPI_CLOCK_PHASE_1EDGE, chipSelect);
+
+}
+
+
 void SpiPorts_Init(tSpiChipSelectPins *SpiChipSelectPins) {
     SPI_PORTS.Spi1 = vSpiPort_InitSPI1(&SpiChipSelectPins->spi1ChipSelect);
     SPI_PORTS.Spi1_IO = vSpiPortGetIo(&SPI_PORTS.Spi1);
 
     SPI_PORTS.Spi2 = vSpiPort_InitSPI2(&SpiChipSelectPins->spi2ChipSelect);
     SPI_PORTS.Spi2_IO = vSpiPortGetIo(&SPI_PORTS.Spi2);
+
+    SPI_PORTS.Spi3 = vSpiPort_InitSPI3(&SpiChipSelectPins->spi3ChipSelect);
+    SPI_PORTS.Spi3_IO = vSpiPortGetIo(&SPI_PORTS.Spi3);
+
+    SPI_PORTS.Spi4 = vSpiPort_InitSPI4(&SpiChipSelectPins->spi4ChipSelect);
+    SPI_PORTS.Spi4_IO = vSpiPortGetIo(&SPI_PORTS.Spi4);
 }
\ No newline at end of file
diff --git a/SpiPorts.h b/SpiPorts.h
index b7a72d0..8392b2c 100644
--- a/SpiPorts.h
+++ b/SpiPorts.h
@@ -10,6 +10,8 @@
 typedef struct {
     tGpioPin spi1ChipSelect;
     tGpioPin spi2ChipSelect;
+    tGpioPin spi3ChipSelect;
+    tGpioPin spi4ChipSelect;
 } tSpiChipSelectPins;
 
 typedef struct {
@@ -18,6 +20,12 @@ typedef struct {
 
     tSpiPortArtery Spi2;
     tSpiPortIO Spi2_IO;
+
+    tSpiPortArtery Spi3;
+    tSpiPortIO Spi3_IO;
+
+    tSpiPortArtery Spi4;
+    tSpiPortIO Spi4_IO;
 } tSpiPorts;
 
 extern tSpiPorts SPI_PORTS;