Initial project setup

managed_components/espressif__tinyusb/hw/bsp/pic32mz/family.c

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+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2022 Jerzy Kasenberg
+ *
+ * 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.
+ */
+
+/* metadata:
+   manufacturer: Microchip
+*/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <xc.h>
+#include "tusb.h"
+
+void __attribute__((interrupt(IPL2AUTO), vector(_USB_VECTOR), no_fpu))
+USBD_IRQHandler(void)
+{
+  IFS4CLR = _IFS4_USBIF_MASK;
+  tud_int_handler(0);
+}
+
+TU_ATTR_WEAK void button_init(void)
+{
+}
+
+TU_ATTR_WEAK void led_init(void)
+{
+}
+
+TU_ATTR_WEAK void uart_init(void)
+{
+}
+
+void board_init(void)
+{
+  button_init();
+  led_init();
+  uart_init();
+
+  // Force device mode by overriding USB ID and settings it to 1
+  USBCRCONbits.PHYIDEN = 0;
+  USBCRCONbits.USBIDVAL = 1;
+  USBCRCONbits.USBIDOVEN = 1;
+
+  // set interrupt priority (must much IPL2AUTO)
+  IPC33CLR = _IPC33_USBIP_MASK;
+  IPC33SET = (2 << _IPC33_USBIP_POSITION);
+  // set interrupt subpriority
+  IPC33CLR = _IPC33_USBIS_MASK;
+  IPC33SET = (0 << _IPC33_USBIS_POSITION);
+
+  USBCRCONbits.USBIE = 0;
+  IFS4CLR = _IFS4_USBIF_MASK;
+  IEC4SET = _IEC4_USBIE_MASK;
+
+  __builtin_enable_interrupts();
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+TU_ATTR_WEAK void board_led_write(bool state)
+{
+  (void) state;
+}
+
+TU_ATTR_WEAK uint32_t board_button_read(void)
+{
+  return 0;
+}
+
+TU_ATTR_WEAK int board_uart_read(uint8_t * buf, int len)
+{
+  (void) buf;
+  (void) len;
+
+  return 0;
+}
+
+TU_ATTR_WEAK int board_uart_write(void const * buf, int len)
+{
+  (void) buf;
+  return len;
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+uint32_t board_millis(void)
+{
+  // COUNTER is system clock (200MHz / 2 = 100MHz) convert to ms)
+  return _CP0_GET_COUNT() / (100000000 / 1000);
+}
+#endif