add circuitpython code

1 files changed, 130 insertions, 0 deletions

diff --git a/circuitpython/lib/tinyusb/hw/bsp/xmc4000/family.c b/circuitpython/lib/tinyusb/hw/bsp/xmc4000/family.c
new file mode 100644
index 0000000..bf66847
--- /dev/null
+++ b/circuitpython/lib/tinyusb/hw/bsp/xmc4000/family.c
@@ -0,0 +1,130 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#include "xmc_gpio.h"
+#include "xmc_scu.h"
+
+#include "bsp/board.h"
+#include "board.h"
+
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB0_0_IRQHandler(void)
+{
+  tud_int_handler(0);
+}
+
+void board_init(void)
+{
+  board_clock_init();
+  SystemCoreClockUpdate();
+
+  // LED
+  XMC_GPIO_CONFIG_t led_cfg;
+  led_cfg.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL;
+  led_cfg.output_level = XMC_GPIO_OUTPUT_LEVEL_HIGH;
+  led_cfg.output_strength = XMC_GPIO_OUTPUT_STRENGTH_MEDIUM;
+  XMC_GPIO_Init(LED_PIN, &led_cfg);
+
+  // Button
+  XMC_GPIO_CONFIG_t button_cfg;
+  button_cfg.mode = XMC_GPIO_MODE_INPUT_TRISTATE;
+  XMC_GPIO_Init(BUTTON_PIN, &button_cfg);
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+  // 1ms tick timer
+  SysTick_Config(SystemCoreClock / 1000);
+
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // Explicitly disable systick to prevent its ISR runs before scheduler start
+  SysTick->CTRL &= ~1U;
+
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB0_0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
+#endif
+
+  // USB Power Enable
+  XMC_SCU_RESET_DeassertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_USB0);
+  XMC_SCU_POWER_EnableUsb();
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  uint32_t is_high = state ? LED_STATE_ON : (1-LED_STATE_ON);
+
+  XMC_GPIO_SetOutputLevel(LED_PIN, is_high ? XMC_GPIO_OUTPUT_LEVEL_HIGH : XMC_GPIO_OUTPUT_LEVEL_LOW);
+}
+
+uint32_t board_button_read(void)
+{
+  return BUTTON_STATE_ACTIVE == XMC_GPIO_GetInput(BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len)
+{
+#ifdef UART_DEV
+  for(int i=0;i<len;i++) {
+    buf[i] = uart_getc(uart_inst);
+  }
+  return len;
+#else
+  (void) buf; (void) len;
+  return 0;
+#endif
+}
+
+int board_uart_write(void const * buf, int len)
+{
+#ifdef UART_DEV
+  char const* bufch = (char const*) buf;
+  for(int i=0;i<len;i++) {
+    uart_putc(uart_inst, bufch[i]);
+  }
+  return len;
+#else
+  (void) buf; (void) len;
+  return 0;
+#endif
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+void SysTick_Handler(void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif