Simple led blinker on new platform

platformio.ini

@@ -1,40 +1,17 @@
 ; PlatformIO Project Configuration File https://docs.platformio.org/page/projectconf.html
 
-[env:genericSTM32F103C8]
-platform = ststm32
-board = genericSTM32F103C8
-board_build.mcu = stm32f103c8t6
-board_build.core = maple
-framework = arduino
+[env:genericGD32F205VC]
+platform = https://github.com/CommunityGD32Cores/platform-gd32.git
+board = genericGD32F205VC
+board_build.mcu = gd32f205vct6
+board_build.core = gd32
+framework = spl
 lib_deps =
     greiman/SdFat @ ^2.0.6
 upload_protocol = stlink
-; Different gcc versions produce much different binaries in terms of speed.
-; 1.40804.0 ; 985kb/sec
-; 1.60301.0 ; 1012kb/sec ***
-; 1.70201.0 ; 926kb/sec
-; 1.80301.0 ; 935kb/sec
-; 1.80201.181220 ; 921kb/sec
-; 1.90201.191206 ; 912kb/sec
-; 1.90301.200702 ; default - 955kb/sec
-platform_packages = toolchain-gccarmnoneeabi@1.60301.0
+platform_packages = 
+    toolchain-gccarmnoneeabi@1.60301.0
+    framework-spl-gd32@https://github.com/CommunityGD32Cores/gd32-pio-spl-package.git
 
-build_unflags = 
-    -Os
-    -DARDUINO_ARCH_STM32F1
 build_flags = 
-    -w
-    -DARDUINO_GENERIC_STM32F103C
-    -DARDUINO_LIB_DISCOVERY_PHASE
-    -DARDUINO=10813
-    -DARDUINO_ARCH_STM32
-    -DDEBUG_LEVEL=DEBUG_NONE
-    -O2
-
-; Work around for clones.
-; https://community.platformio.org/t/cannot-upload-to-stm32-bluepill-board-over-stlink-v2/3492/25
-upload_flags = -c set CPUTAPID 0
-
-; [env:debug]
-; build_type = debug
-; debug_tool = stlink
+     -Os -Wall -ggdb -g3

src/AzulSCSI.cpp

@@ -40,12 +40,10 @@
  *     CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  
  */
 
-#include <Arduino.h> // For Platform.IO
-#include <SdFat.h>
+#include "platform_GD32F205.h"
 
-#ifdef USE_STM32_DMA
-#warning "warning USE_STM32_DMA"
-#endif
+#if 0
+#include <SdFat.h>
 
 #define DEBUG            0      // 0:No debug information output
                                 // 1: Debug information output to USB Serial
@@ -1454,3 +1452,18 @@ BusFree:
   //SCSI_OUT(vBSY,inactive)
   SCSI_TARGET_INACTIVE() // Turn off BSY, REQ, MSG, CD, IO output
 }
+
+#endif
+
+int main(void)
+{
+  platform_init();
+
+  while (1)
+  {
+    LED_ON();
+    for (int i = 0; i < 1000000; i++) asm("nop");
+    LED_OFF();
+    for (int i = 0; i < 1000000; i++) asm("nop");
+  }
+}

src/platform_GD32F205.h

@@ -0,0 +1,133 @@
+// Platform-specific definitions.
+// Can be customized for different microcontrollers, this file is for GD32F205VCT6.
+
+#pragma once
+
+#include <gd32f20x.h>
+#include <gd32f20x_gpio.h>
+
+// GPIO definitions
+
+// SCSI output port.
+// This is written using BSRR mechanism, so all output pins must be on same GPIO port.
+// The output pins are open-drain in hardware, using separate buffer chips for driving.
+#define SCSI_OUT_PORT GPIOD
+#define SCSI_OUT_DB7  GPIO_PIN_0
+#define SCSI_OUT_DB6  GPIO_PIN_1
+#define SCSI_OUT_DB5  GPIO_PIN_2
+#define SCSI_OUT_DB4  GPIO_PIN_3
+#define SCSI_OUT_DB3  GPIO_PIN_4
+#define SCSI_OUT_DB2  GPIO_PIN_5
+#define SCSI_OUT_DB1  GPIO_PIN_6
+#define SCSI_OUT_DB0  GPIO_PIN_7
+#define SCSI_OUT_IO   GPIO_PIN_8
+#define SCSI_OUT_REQ  GPIO_PIN_9
+#define SCSI_OUT_CD   GPIO_PIN_10
+#define SCSI_OUT_SEL  GPIO_PIN_11
+#define SCSI_OUT_MSG  GPIO_PIN_12
+#define SCSI_OUT_RST  GPIO_PIN_13
+#define SCSI_OUT_BSY  GPIO_PIN_14
+#define SCSI_OUT_DBP  GPIO_PIN_15
+#define SCSI_OUT_MASK 0xFFFF
+
+// SCSI input port
+#define SCSI_IN_PORT  GPIOE
+#define SCSI_IN_DB7   GPIO_PIN_15
+#define SCSI_IN_DB6   GPIO_PIN_14
+#define SCSI_IN_DB5   GPIO_PIN_13
+#define SCSI_IN_DB4   GPIO_PIN_12
+#define SCSI_IN_DB3   GPIO_PIN_11
+#define SCSI_IN_DB2   GPIO_PIN_10
+#define SCSI_IN_DB1   GPIO_PIN_9
+#define SCSI_IN_DB0   GPIO_PIN_8
+#define SCSI_IN_DBP   GPIO_PIN_7
+#define SCSI_IN_MASK  (SCSI_IN_DB7|SCSI_IN_DB6|SCSI_IN_DB5|SCSI_IN_DB4|SCSI_IN_DB3|SCSI_IN_DB2|SCSI_IN_DB1|SCSI_IN_DB0|SCSI_IN_DBP)
+
+// Various SCSI status signals
+#define SCSI_ATN_PORT GPIOB // FIXME: Change to 5V-tolerant pin
+#define SCSI_ATN_PIN  GPIO_PIN_0
+#define SCSI_BSY_PORT GPIOB
+#define SCSI_BSY_PIN  GPIO_PIN_10
+#define SCSI_SEL_PORT GPIOB
+#define SCSI_SEL_PIN  GPIO_PIN_11
+#define SCSI_ACK_PORT GPIOB
+#define SCSI_ACK_PIN  GPIO_PIN_12
+#define SCSI_RST_PORT GPIOB
+#define SCSI_RST_PIN  GPIO_PIN_13
+
+// Terminator enable/disable config, active low
+#define SCSI_TERM_EN_PORT GPIOC
+#define SCSI_TERM_EN_PIN  GPIO_PIN_8
+
+// SD card pins
+#define SD_PORT      GPIOA
+#define SD_CS_PIN    GPIO_PIN_4
+#define SD_CLK_PIN   GPIO_PIN_5
+#define SD_MISO_PIN  GPIO_PIN_6
+#define SD_MOSI_PIN  GPIO_PIN_7
+
+// DIP switches
+#define DIP_PORT     GPIOB
+#define DIPSW1_PIN   GPIO_PIN_4
+#define DIPSW2_PIN   GPIO_PIN_5
+#define DIPSW3_PIN   GPIO_PIN_6
+
+// Status LED pins
+#define LED_PORT     GPIOC
+#define LED_I_PIN    GPIO_PIN_4
+#define LED_E_PIN    GPIO_PIN_5
+#define LED_PINS     (LED_I_PIN | LED_E_PIN)
+#define LED_ON()     gpio_bit_reset(LED_PORT, LED_PINS)
+#define LED_OFF()    gpio_bit_set(LED_PORT, LED_PINS)
+
+// Debug logging functions
+#define LOG(XX)     //Serial.print(XX)
+#define LOGHEX(XX)  //Serial.print(XX, HEX)
+#define LOGN(XX)    //Serial.println(XX)
+#define LOGHEXN(XX) //Serial.println(XX, HEX)
+
+// Initialize SPI and GPIO configuration
+// Clock has already been initialized by system_gd32f20x.c
+static void platform_init()
+{
+    // Enable needed clocks
+    rcu_periph_clock_enable(RCU_GPIOA);
+    rcu_periph_clock_enable(RCU_GPIOB);
+    rcu_periph_clock_enable(RCU_GPIOC);
+    rcu_periph_clock_enable(RCU_GPIOD);
+    rcu_periph_clock_enable(RCU_GPIOE);
+
+    // Switch to SWD debug port (disable JTAG) to release PB4 as GPIO
+    gpio_pin_remap_config(GPIO_SWJ_SWDPENABLE_REMAP, ENABLE);    
+
+    // SCSI pins.
+    // Initialize open drain outputs to high.
+    gpio_bit_set(SCSI_OUT_PORT, SCSI_OUT_MASK);
+    gpio_init(SCSI_OUT_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, SCSI_OUT_MASK);
+    gpio_init(SCSI_IN_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_IN_MASK);
+    gpio_init(SCSI_ATN_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_ATN_PIN);
+    gpio_init(SCSI_BSY_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_BSY_PIN);
+    gpio_init(SCSI_SEL_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_SEL_PIN);
+    gpio_init(SCSI_ACK_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_ACK_PIN);
+    gpio_init(SCSI_RST_PORT, GPIO_MODE_IN_FLOATING, 0, SCSI_RST_PIN);
+
+    // Terminator enable
+    gpio_bit_set(SCSI_TERM_EN_PORT, SCSI_TERM_EN_PIN);
+    gpio_init(SCSI_TERM_EN_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_2MHZ, SCSI_TERM_EN_PIN);
+
+    // SD card pins
+    gpio_init(SD_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, SD_CS_PIN);
+    gpio_init(SD_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SD_CLK_PIN);
+    gpio_init(SD_PORT, GPIO_MODE_IN_FLOATING, 0, SD_MISO_PIN);
+    gpio_init(SD_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, SD_MOSI_PIN);
+
+    // DIP switches
+    gpio_init(DIP_PORT, GPIO_MODE_IPD, 0, DIPSW1_PIN | DIPSW2_PIN | DIPSW3_PIN);
+
+    // LED pins
+    gpio_bit_set(LED_PORT, LED_PINS);
+    gpio_init(LED_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_2MHZ, LED_PINS);
+
+    // SWO trace pin on PB3
+    gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_3);
+}