diff --git a/demo/spi/max7219_8x8_led.c b/demo/spi/max7219_8x8led.c
similarity index 99%
rename from demo/spi/max7219_8x8_led.c
rename to demo/spi/max7219_8x8led.c
index 0f80b2a..7ac88ad 100644
--- a/demo/spi/max7219_8x8_led.c
+++ b/demo/spi/max7219_8x8led.c
@@ -14,6 +14,7 @@
 
 /**
  * Demo: MAX7219 8x8 LED Matrix
+ * Board: STC8H1K08
  * 
  * P1.3  -> DIN
  * P1.5  -> SCLK
diff --git a/demo/spi/max7219_8x8led_4in1.c b/demo/spi/max7219_8x8led_4in1.c
new file mode 100644
index 0000000..596a31f
--- /dev/null
+++ b/demo/spi/max7219_8x8led_4in1.c
@@ -0,0 +1,203 @@
+// Copyright 2021 IOsetting <iosetting(at)outlook.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * Demo: MAX7219 8x8 LED Matrix 4 in 1
+ * Board: STC8H1K08
+ * 
+ * P1.3  -> DIN
+ * P1.5  -> SCLK
+ * P1.7  -> CS
+*/
+
+/**
+ * 
+ * PlatformIO configuration example
+
+[env:stc8g1k08]
+platform = intel_mcs51
+board = stc8g1k08
+build_flags =
+    -D__CONF_FOSC=36864000UL
+    -D__CONF_MCU_MODEL=MCU_MODEL_STC8G1K08
+    -D__CONF_CLKDIV=0x00
+    -D__CONF_IRCBAND=0x01
+    -D__CONF_VRTRIM=0x20
+    -D__CONF_IRTRIM=0xA3
+    -D__CONF_LIRTRIM=0x03
+upload_protocol = custom
+upload_port = /dev/ttyUSB0
+upload_speed = 115200
+upload_flags =
+    -p$UPLOAD_PORT
+    -s$UPLOAD_SPEED
+    -e
+upload_command = ${platformio.packages_dir}/tool-stc8prog/stc8prog $UPLOAD_FLAGS -f $SOURCE
+
+*/
+
+#include "fw_hal.h"
+
+#define MAX7219_CS P17
+#define MAX7219_BLOCKS       4
+
+#define DECODE_MODE  0x09
+#define INTENSITY    0x0A
+#define SCAN_LIMIT   0x0B
+#define SHUT_DOWN    0x0C
+#define DISPLAY_TEST 0x0F
+
+const uint8_t numbers[]={
+  0x3e,0x63,0x63,0x7f,0x63,0x63,0x63,0x63, //A
+  0x7e,0x63,0x63,0x7e,0x63,0x63,0x63,0x7e, //B
+  0x3e,0x63,0x63,0x60,0x60,0x63,0x63,0x3e, //C
+  0x7e,0x63,0x63,0x63,0x63,0x63,0x63,0x7e, //D
+  0x7f,0x60,0x60,0x7f,0x60,0x60,0x60,0x7f, //E
+  0x7f,0x60,0x60,0x7e,0x60,0x60,0x60,0x60, //F
+  0x3e,0x63,0x63,0x60,0x67,0x63,0x63,0x3e, //G
+  0x63,0x63,0x63,0x7f,0x63,0x63,0x63,0x63, //H
+  0x3f,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x3f, //I
+  0x1f,0x06,0x06,0x06,0x06,0x66,0x66,0x3c, //J
+  0x63,0x66,0x6c,0x78,0x6c,0x66,0x63,0x61, //K
+  0x60,0x60,0x60,0x60,0x60,0x60,0x60,0x7f, //L
+  0x63,0x77,0x7f,0x6b,0x63,0x63,0x63,0x63, //M
+  0x63,0x63,0x73,0x7b,0x6f,0x67,0x63,0x63, //N
+  0x3e,0x63,0x63,0x63,0x63,0x63,0x63,0x3e, //O
+  0x7e,0x63,0x63,0x63,0x7e,0x60,0x60,0x60, //P
+  0x3c,0x66,0x66,0x66,0x66,0x6e,0x66,0x3f, //Q
+  0x7e,0x63,0x63,0x63,0x7e,0x6c,0x66,0x63, //R
+  0x3e,0x63,0x63,0x60,0x3e,0x03,0x63,0x3e, //S
+  0x3f,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, //T
+  0x63,0x63,0x63,0x63,0x63,0x63,0x63,0x3e, //U
+  0x63,0x63,0x63,0x63,0x63,0x36,0x1c,0x08, //V
+  0x63,0x63,0x63,0x63,0x6b,0x7f,0x77,0x63, //W
+  0x63,0x63,0x36,0x1c,0x1c,0x36,0x63,0x63, //X
+  0x33,0x33,0x33,0x33,0x1e,0x0c,0x0c,0x0c, //Y
+  0x7f,0x03,0x06,0x0c,0x18,0x30,0x60,0x7f, //Z
+  0x3e,0x63,0x73,0x6b,0x67,0x63,0x63,0x3e, //0
+  0x0c,0x1c,0x3c,0x0c,0x0c,0x0c,0x0c,0x3f, //1
+  0x3e,0x63,0x63,0x06,0x0c,0x18,0x30,0x7f, //2
+  0x3e,0x63,0x63,0x0e,0x03,0x63,0x63,0x3e, //3
+  0x06,0x0e,0x1e,0x36,0x66,0x7f,0x06,0x06, //4
+  0x7f,0x60,0x60,0x7e,0x03,0x03,0x03,0x7e, //5
+  0x3e,0x63,0x60,0x7e,0x63,0x63,0x63,0x3e, //6
+  0x7f,0x03,0x03,0x06,0x0c,0x18,0x18,0x18, //7
+  0x3e,0x63,0x63,0x3e,0x63,0x63,0x63,0x3e, //8
+  0x3e,0x63,0x63,0x63,0x3f,0x03,0x63,0x3e, //9
+};
+
+uint8_t val[MAX7219_BLOCKS];
+uint8_t character_len = sizeof(numbers) / 8;
+
+void MAX7219_singeWrite(uint8_t index, uint8_t addr, uint8_t dat)
+{
+    index = index % MAX7219_BLOCKS;
+    MAX7219_CS = 0;
+    SPI_TxRx(addr);
+    SPI_TxRx(dat);
+    while(index--)
+    {
+        SPI_TxRx(addr);
+        SPI_TxRx(dat);
+    }
+    MAX7219_CS = 1;
+}
+
+void MAX7219_multiWrite(uint8_t addr, uint8_t len, uint8_t* dat)
+{
+    MAX7219_CS = 0;
+    while (len--)
+    {
+        SPI_TxRx(addr);
+        SPI_TxRx(*dat++);
+    }
+    MAX7219_CS = 1;
+}
+
+void MAX7219_init(void)
+{
+    for (uint8_t i = 0; i < MAX7219_BLOCKS; i++)
+    {
+        MAX7219_singeWrite(i, SHUT_DOWN, 0x01);    // 0x00:shutdown, 0x01:normal
+        MAX7219_singeWrite(i, DECODE_MODE, 0x00);  // Bypass code B decoder, no-decode operation
+        MAX7219_singeWrite(i, SCAN_LIMIT, 0x07);   // Scan-limit, 0:1-digit, 1:2-digits, ..., 7:8-digits
+        MAX7219_singeWrite(i, INTENSITY, 0x00);    // 0x00:min, 0xFF:max
+        MAX7219_singeWrite(i, DISPLAY_TEST, 0x00); // 0x00:normal, 0x01:test mode
+    }
+}
+
+void SPI_init(void)
+{
+    // MAX7219 can work with frequency up to 20MHz
+    SPI_SetClockPrescaler(SPI_ClockPreScaler_4);
+    // Clock idles low
+    SPI_SetClockPolarity(HAL_State_OFF);
+    // Data transfer is driven by lower SS pin
+    SPI_SetClockPhase(SPI_ClockPhase_LeadingEdge);
+    // MSB first
+    SPI_SetDataOrder(SPI_DataOrder_MSB);
+    // Define the output pins
+    SPI_SetPort(SPI_AlterPort_P12P54_P13_P14_P15);
+    // Ignore SS pin, use MSTR to swith between master/slave mode
+    SPI_IgnoreSlaveSelect(HAL_State_ON);
+    // Master mode
+    SPI_SetMasterMode(HAL_State_ON);
+    // Start SPI
+    SPI_SetEnableState(HAL_State_ON);
+}
+
+void main()
+{
+    /**
+     *    ________________________
+     *    |                       |
+     *    |_______________________|
+     *    A                       B
+     * 
+     * pos: point to the bit for boundary A
+     * lpos: point to the bit for boundary B
+    */
+    uint16_t pos = 0, lpos = 0;
+    uint8_t i, j, cpos = 0, bpos = 0, tcpos = 0;
+
+    SYS_SetClock();
+    // Configure GPIO pins before SPI and device
+    // DIN(P13)
+    GPIO_P1_SetMode(GPIO_Pin_3, GPIO_Mode_InOut_QBD);
+    // SCLK(P15), CS(P17) 
+    GPIO_P1_SetMode(GPIO_Pin_5|GPIO_Pin_7, GPIO_Mode_Output_PP);
+    // Configure SPI and device
+    SPI_init();
+    MAX7219_init();
+
+    while(1)
+    {
+        lpos = pos + sizeof(numbers) - MAX7219_BLOCKS * 8;
+        cpos = lpos / 8;        // char position
+        bpos = lpos % 8;        // bit position
+        for (i = 0; i < 8; i++) // fill each line
+        {
+            for (j = 0; j < MAX7219_BLOCKS; j++)
+            {
+                tcpos = (cpos + j) % character_len;
+                val[j] = numbers[tcpos * 8 + i] << bpos;
+                tcpos = (cpos + j + 1) % character_len;
+                val[j] |= numbers[tcpos * 8 + i] >> (8 - bpos);
+            }
+            MAX7219_multiWrite(i + 1, MAX7219_BLOCKS, val);
+        }
+        pos = (pos + 1) % sizeof(numbers);
+        SYS_Delay(50);
+    }
+}
\ No newline at end of file
diff --git a/demo/spi/max7219_8x8led_4in1_stc8g1k08.c b/demo/spi/max7219_8x8led_4in1_stc8g1k08.c
new file mode 100644
index 0000000..01eaba0
--- /dev/null
+++ b/demo/spi/max7219_8x8led_4in1_stc8g1k08.c
@@ -0,0 +1,204 @@
+// Copyright 2021 IOsetting <iosetting(at)outlook.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * Demo: MAX7219 8x8 LED Matrix 4 in 1
+ * Board: STC8G1K08, STC8G1K08A
+ * 
+ * P5.4  -> DIN
+ * P3.2  -> SCLK
+ * P5.5  -> CS
+*/
+
+/**
+ * 
+ * PlatformIO configuration example
+
+[env:stc8g1k08]
+platform = intel_mcs51
+board = stc8g1k08
+build_flags =
+    -D__CONF_FOSC=36864000UL
+    -D__CONF_MCU_MODEL=MCU_MODEL_STC8G1K08
+    -D__CONF_CLKDIV=0x00
+    -D__CONF_IRCBAND=0x01
+    -D__CONF_VRTRIM=0x20
+    -D__CONF_IRTRIM=0xA3
+    -D__CONF_LIRTRIM=0x03
+upload_protocol = custom
+upload_port = /dev/ttyUSB0
+upload_speed = 115200
+upload_flags =
+    -p$UPLOAD_PORT
+    -s$UPLOAD_SPEED
+    -e
+upload_command = ${platformio.packages_dir}/tool-stc8prog/stc8prog $UPLOAD_FLAGS -f $SOURCE
+
+*/
+
+#include "fw_hal.h"
+
+#define MAX7219_CS P55
+#define MAX7219_BLOCKS       4
+
+#define DECODE_MODE  0x09
+#define INTENSITY    0x0A
+#define SCAN_LIMIT   0x0B
+#define SHUT_DOWN    0x0C
+#define DISPLAY_TEST 0x0F
+
+const uint8_t numbers[]={
+  0x3e,0x63,0x63,0x7f,0x63,0x63,0x63,0x63, //A
+  0x7e,0x63,0x63,0x7e,0x63,0x63,0x63,0x7e, //B
+  0x3e,0x63,0x63,0x60,0x60,0x63,0x63,0x3e, //C
+  0x7e,0x63,0x63,0x63,0x63,0x63,0x63,0x7e, //D
+  0x7f,0x60,0x60,0x7f,0x60,0x60,0x60,0x7f, //E
+  0x7f,0x60,0x60,0x7e,0x60,0x60,0x60,0x60, //F
+  0x3e,0x63,0x63,0x60,0x67,0x63,0x63,0x3e, //G
+  0x63,0x63,0x63,0x7f,0x63,0x63,0x63,0x63, //H
+  0x3f,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x3f, //I
+  0x1f,0x06,0x06,0x06,0x06,0x66,0x66,0x3c, //J
+  0x63,0x66,0x6c,0x78,0x6c,0x66,0x63,0x61, //K
+  0x60,0x60,0x60,0x60,0x60,0x60,0x60,0x7f, //L
+  0x63,0x77,0x7f,0x6b,0x63,0x63,0x63,0x63, //M
+  0x63,0x63,0x73,0x7b,0x6f,0x67,0x63,0x63, //N
+  0x3e,0x63,0x63,0x63,0x63,0x63,0x63,0x3e, //O
+  0x7e,0x63,0x63,0x63,0x7e,0x60,0x60,0x60, //P
+  0x3c,0x66,0x66,0x66,0x66,0x6e,0x66,0x3f, //Q
+  0x7e,0x63,0x63,0x63,0x7e,0x6c,0x66,0x63, //R
+  0x3e,0x63,0x63,0x60,0x3e,0x03,0x63,0x3e, //S
+  0x3f,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, //T
+  0x63,0x63,0x63,0x63,0x63,0x63,0x63,0x3e, //U
+  0x63,0x63,0x63,0x63,0x63,0x36,0x1c,0x08, //V
+  0x63,0x63,0x63,0x63,0x6b,0x7f,0x77,0x63, //W
+  0x63,0x63,0x36,0x1c,0x1c,0x36,0x63,0x63, //X
+  0x33,0x33,0x33,0x33,0x1e,0x0c,0x0c,0x0c, //Y
+  0x7f,0x03,0x06,0x0c,0x18,0x30,0x60,0x7f, //Z
+  0x3e,0x63,0x73,0x6b,0x67,0x63,0x63,0x3e, //0
+  0x0c,0x1c,0x3c,0x0c,0x0c,0x0c,0x0c,0x3f, //1
+  0x3e,0x63,0x63,0x06,0x0c,0x18,0x30,0x7f, //2
+  0x3e,0x63,0x63,0x0e,0x03,0x63,0x63,0x3e, //3
+  0x06,0x0e,0x1e,0x36,0x66,0x7f,0x06,0x06, //4
+  0x7f,0x60,0x60,0x7e,0x03,0x03,0x03,0x7e, //5
+  0x3e,0x63,0x60,0x7e,0x63,0x63,0x63,0x3e, //6
+  0x7f,0x03,0x03,0x06,0x0c,0x18,0x18,0x18, //7
+  0x3e,0x63,0x63,0x3e,0x63,0x63,0x63,0x3e, //8
+  0x3e,0x63,0x63,0x63,0x3f,0x03,0x63,0x3e, //9
+};
+
+uint8_t val[MAX7219_BLOCKS];
+uint8_t character_len = sizeof(numbers) / 8;
+
+void MAX7219_singeWrite(uint8_t index, uint8_t addr, uint8_t dat)
+{
+    index = index % MAX7219_BLOCKS;
+    MAX7219_CS = 0;
+    SPI_TxRx(addr);
+    SPI_TxRx(dat);
+    while(index--)
+    {
+        SPI_TxRx(addr);
+        SPI_TxRx(dat);
+    }
+    MAX7219_CS = 1;
+}
+
+void MAX7219_multiWrite(uint8_t addr, uint8_t len, uint8_t* dat)
+{
+    MAX7219_CS = 0;
+    while (len--)
+    {
+        SPI_TxRx(addr);
+        SPI_TxRx(*dat++);
+    }
+    MAX7219_CS = 1;
+}
+
+void MAX7219_init(void)
+{
+    for (uint8_t i = 0; i < MAX7219_BLOCKS; i++)
+    {
+        MAX7219_singeWrite(i, SHUT_DOWN, 0x01);    // 0x00:shutdown, 0x01:normal
+        MAX7219_singeWrite(i, DECODE_MODE, 0x00);  // Bypass code B decoder, no-decode operation
+        MAX7219_singeWrite(i, SCAN_LIMIT, 0x07);   // Scan-limit, 0:1-digit, 1:2-digits, ..., 7:8-digits
+        MAX7219_singeWrite(i, INTENSITY, 0x00);    // 0x00:min, 0xFF:max
+        MAX7219_singeWrite(i, DISPLAY_TEST, 0x00); // 0x00:normal, 0x01:test mode
+    }
+}
+
+void SPI_init(void)
+{
+    // MAX7219 can work with frequency up to 20MHz
+    SPI_SetClockPrescaler(SPI_ClockPreScaler_4);
+    // Clock idles low
+    SPI_SetClockPolarity(HAL_State_OFF);
+    // Data transfer is driven by lower SS pin
+    SPI_SetClockPhase(SPI_ClockPhase_LeadingEdge);
+    // MSB first
+    SPI_SetDataOrder(SPI_DataOrder_MSB);
+    // Define the output pins
+    SPI_SetPort(SPI_AlterPort_P12P54_P13_P14_P15);
+    // Ignore SS pin, use MSTR to swith between master/slave mode
+    SPI_IgnoreSlaveSelect(HAL_State_ON);
+    // Master mode
+    SPI_SetMasterMode(HAL_State_ON);
+    // Start SPI
+    SPI_SetEnableState(HAL_State_ON);
+}
+
+void main()
+{
+    /**
+     *    ________________________
+     *    |                       |
+     *    |_______________________|
+     *    A                       B
+     * 
+     * pos: point to the bit for boundary A
+     * lpos: point to the bit for boundary B
+    */
+    uint16_t pos = 0, lpos = 0;
+    uint8_t i, j, cpos = 0, bpos = 0, tcpos = 0;
+
+    SYS_SetClock();
+    // Configure GPIO pins before SPI and device
+    // SCLK(P32), CS(P55) 
+    GPIO_P3_SetMode(GPIO_Pin_2, GPIO_Mode_Output_PP);
+    GPIO_P5_SetMode(GPIO_Pin_5, GPIO_Mode_Output_PP);
+    // MOSI(P54)
+    GPIO_P5_SetMode(GPIO_Pin_4, GPIO_Mode_InOut_QBD);
+    // Configure SPI and device
+    SPI_init();
+    MAX7219_init();
+
+    while(1)
+    {
+        lpos = pos + sizeof(numbers) - MAX7219_BLOCKS * 8;
+        cpos = lpos / 8;        // char position
+        bpos = lpos % 8;        // bit position
+        for (i = 0; i < 8; i++) // fill each line
+        {
+            for (j = 0; j < MAX7219_BLOCKS; j++)
+            {
+                tcpos = (cpos + j) % character_len;
+                val[j] = numbers[tcpos * 8 + i] << bpos;
+                tcpos = (cpos + j + 1) % character_len;
+                val[j] |= numbers[tcpos * 8 + i] >> (8 - bpos);
+            }
+            MAX7219_multiWrite(i + 1, MAX7219_BLOCKS, val);
+        }
+        pos = (pos + 1) % sizeof(numbers);
+        SYS_Delay(100);
+    }
+}
\ No newline at end of file
diff --git a/demo/spi/max7219_8x8led_stc8g1k08.c b/demo/spi/max7219_8x8led_stc8g1k08.c
new file mode 100644
index 0000000..f560ae0
--- /dev/null
+++ b/demo/spi/max7219_8x8led_stc8g1k08.c
@@ -0,0 +1,144 @@
+// Copyright 2021 IOsetting <iosetting(at)outlook.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * Demo: MAX7219 8x8 LED Matrix
+ * Board: STC8G1K08, STC8G1K08A
+ * 
+ * P5.4  -> DIN
+ * P3.2  -> SCLK
+ * P5.5  -> CS
+*/
+
+/**
+ * 
+ * PlatformIO configuration example
+
+[env:stc8g1k08]
+platform = intel_mcs51
+board = stc8g1k08
+build_flags =
+    -D__CONF_FOSC=36864000UL
+    -D__CONF_MCU_MODEL=MCU_MODEL_STC8G1K08
+    -D__CONF_CLKDIV=0x00
+    -D__CONF_IRCBAND=0x01
+    -D__CONF_VRTRIM=0x20
+    -D__CONF_IRTRIM=0xA3
+    -D__CONF_LIRTRIM=0x03
+upload_protocol = custom
+upload_port = /dev/ttyUSB0
+upload_speed = 115200
+upload_flags =
+    -p$UPLOAD_PORT
+    -s$UPLOAD_SPEED
+    -e
+upload_command = ${platformio.packages_dir}/tool-stc8prog/stc8prog $UPLOAD_FLAGS -f $SOURCE
+
+*/
+
+#include "fw_hal.h"
+
+#define MAX7219_CS P55
+
+#define DECODE_MODE  0x09
+#define INTENSITY    0x0A
+#define SCAN_LIMIT   0x0B
+#define SHUT_DOWN    0x0C
+#define DISPLAY_TEST 0x0F
+
+const uint8_t numbers[]={
+0x00,0x00,0x7C,0xC6,0xC6,0xCE,0xD6,0xD6,  // -0-.  
+0xE6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00,
+0x00,0x00,0x18,0x38,0x78,0x18,0x18,0x18,  // -1-  
+0x18,0x18,0x18,0x7E,0x00,0x00,0x00,0x00,  
+0x00,0x00,0x7C,0xC6,0x06,0x0C,0x18,0x30,  // -2-  
+0x60,0xC0,0xC6,0xFE,0x00,0x00,0x00,0x00,  
+0x00,0x00,0x7C,0xC6,0x06,0x06,0x3C,0x06,  // -3-  
+0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00,  
+0x00,0x00,0x0C,0x1C,0x3C,0x6C,0xCC,0xFE,  // -4-  
+0x0C,0x0C,0x0C,0x1E,0x00,0x00,0x00,0x00,  
+0x00,0x00,0xFE,0xC0,0xC0,0xC0,0xFC,0x0E,  // -5-  
+0x06,0x06,0xC6,0x7C,0x00,0x00,0x00,0x00,  
+0x00,0x00,0x38,0x60,0xC0,0xC0,0xFC,0xC6,  // -6-  
+0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00,  
+0x00,0x00,0xFE,0xC6,0x06,0x06,0x0C,0x18,  // -7-  
+0x30,0x30,0x30,0x30,0x00,0x00,0x00,0x00,  
+0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7C,0xC6,  // -8-  
+0xC6,0xC6,0xC6,0x7C,0x00,0x00,0x00,0x00, 
+0x00,0x00,0x7C,0xC6,0xC6,0xC6,0x7E,0x06,  // -9-  
+0x06,0x06,0x0C,0x78,0x00,0x00,0x00,0x00};
+
+void MAX7219_write(uint8_t addr, uint8_t dat)
+{
+    MAX7219_CS = 0;
+    SPI_TxRx(addr);
+    SPI_TxRx(dat);
+    MAX7219_CS = 1;
+}
+
+void MAX7219_init(void)
+{
+    MAX7219_write(SHUT_DOWN,    0x01);      // 0x00:shutdown, 0x01:normal
+    MAX7219_write(DECODE_MODE,  0x00);      // Bypass code B decoder, no-decode operation
+    MAX7219_write(SCAN_LIMIT,   0x07);      // Scan-limit, 0:1-digit, 1:2-digits, ... 7:8-digits
+    MAX7219_write(INTENSITY,    0x01);      // 0x00:min, 0xFF:max
+    MAX7219_write(DISPLAY_TEST, 0x00);      // 0x00:normal, 0x01:test mode
+}
+
+void SPI_init(void)
+{
+    // MAX7219 can work with frequency up to 20MHz
+    SPI_SetClockPrescaler(SPI_ClockPreScaler_4);
+    // Clock idles low
+    SPI_SetClockPolarity(HAL_State_OFF);
+    // Data transfer is driven by lower SS pin
+    SPI_SetClockPhase(SPI_ClockPhase_LeadingEdge);
+    // MSB first
+    SPI_SetDataOrder(SPI_DataOrder_MSB);
+    // Define the output pins
+    SPI_SetPort(SPI_AlterPort_P12P54_P13_P14_P15);
+    // Ignore SS pin, use MSTR to swith between master/slave mode
+    SPI_IgnoreSlaveSelect(HAL_State_ON);
+    // Master mode
+    SPI_SetMasterMode(HAL_State_ON);
+    // Start SPI
+    SPI_SetEnableState(HAL_State_ON);
+}
+
+void main()
+{
+    uint8_t pos = 0, size = sizeof(numbers), i, j;
+
+    SYS_SetClock();
+    // Configure GPIO pins before SPI and device
+    // SCLK(P32), CS(P55) 
+    GPIO_P3_SetMode(GPIO_Pin_2, GPIO_Mode_Output_PP);
+    GPIO_P5_SetMode(GPIO_Pin_5, GPIO_Mode_Output_PP);
+    // MOSI(P54)
+    GPIO_P5_SetMode(GPIO_Pin_4, GPIO_Mode_InOut_QBD);
+    // Configure SPI and device
+    SPI_init();
+    MAX7219_init();
+
+    while(1)
+    {
+        for (i = 0; i < 8; i++)
+        {
+            j = (pos + i) % size;
+            MAX7219_write(i + 1, numbers[j]);
+        }
+        pos = (pos + 1) % size;
+        SYS_Delay(100);
+    }
+}
\ No newline at end of file