initial commit

third_party/tinyusb/hw/bsp/lpc17/family.c

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+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 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.
+ */
+
+/* metadata:
+   manufacturer: NXP
+*/
+
+#include "chip.h"
+#include "bsp/board_api.h"
+#include "board.h"
+
+// Invoked by startup code
+void SystemInit(void) {
+#ifdef __USE_LPCOPEN
+  extern void (* const g_pfnVectors[])(void);
+  unsigned int* pSCB_VTOR = (unsigned int*) 0xE000ED08;
+  *pSCB_VTOR = (unsigned int) g_pfnVectors;
+#endif
+
+  Chip_IOCON_Init(LPC_IOCON);
+  Chip_IOCON_SetPinMuxing(LPC_IOCON, pinmuxing, sizeof(pinmuxing) / sizeof(PINMUX_GRP_T));
+  Chip_SetupXtalClocking();
+
+  Chip_SYSCTL_SetFLASHAccess(FLASHTIM_100MHZ_CPU);
+}
+
+void board_init(void) {
+  SystemCoreClockUpdate();
+
+#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 from running before scheduler start
+  SysTick->CTRL &= ~1U;
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
+#endif
+
+  Chip_GPIO_Init(LPC_GPIO);
+  Chip_GPIO_SetPinDIROutput(LPC_GPIO, LED_PORT, LED_PIN);
+  Chip_GPIO_SetPinDIRInput(LPC_GPIO, BUTTON_PORT, BUTTON_PIN);
+
+  //------------- UART -------------//
+  // Pin muxing for UART3 (TXD3=P0.0, RXD3=P0.1) is configured in board.h pinmuxing[]
+  Chip_UART_Init(BOARD_UART_PORT);
+  Chip_UART_SetBaud(BOARD_UART_PORT, CFG_BOARD_UART_BAUDRATE);
+  Chip_UART_ConfigData(BOARD_UART_PORT, (UART_LCR_WLEN8 | UART_LCR_SBS_1BIT | UART_LCR_PARITY_DIS));
+  Chip_UART_SetupFIFOS(BOARD_UART_PORT, (UART_FCR_FIFO_EN | UART_FCR_TRG_LEV0));
+  Chip_UART_TXEnable(BOARD_UART_PORT);
+
+  //------------- USB -------------//
+  Chip_IOCON_SetPinMuxing(LPC_IOCON, pin_usb_mux, sizeof(pin_usb_mux) / sizeof(PINMUX_GRP_T));
+  Chip_USB_Init();
+
+  enum {
+    USBCLK_DEVCIE = 0x12,     // AHB + Device
+    USBCLK_HOST = 0x19,     // AHB + Host + OTG
+//    0x1B // Host + Device + OTG + AHB
+  };
+
+#if CFG_TUD_ENABLED
+  uint32_t const clk_en = USBCLK_DEVCIE;
+#else
+  uint32_t const clk_en = USBCLK_HOST;
+#endif
+
+  LPC_USB->OTGClkCtrl = clk_en;
+  while ((LPC_USB->OTGClkSt & clk_en) != clk_en) {}
+
+#if CFG_TUH_ENABLED
+  // set portfunc to host !!!
+  LPC_USB->StCtrl = 0x3; // should be 1
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+void board_led_write(bool state) {
+  Chip_GPIO_SetPinState(LPC_GPIO, LED_PORT, LED_PIN, state ? LED_STATE_ON : (1 - LED_STATE_ON));
+}
+
+uint32_t board_button_read(void) {
+  return BUTTON_STATE_ACTIVE == Chip_GPIO_GetPinState(LPC_GPIO, BUTTON_PORT, BUTTON_PIN);
+}
+
+int board_uart_read(uint8_t* buf, int len) {
+  int count = 0;
+  while (count < len) {
+    if (BOARD_UART_PORT->LSR & UART_LSR_RDR) {
+      buf[count] = (uint8_t) BOARD_UART_PORT->RBR;
+      count++;
+    } else {
+      break;
+    }
+  }
+  return count;
+}
+
+int board_uart_write(void const* buf, int len) {
+  const uint8_t *p = (const uint8_t *) buf;
+  int count = 0;
+  while (count < len) {
+    if (BOARD_UART_PORT->LSR & UART_LSR_THRE) {
+      BOARD_UART_PORT->THR = p[count];
+      count++;
+    } else {
+      break;
+    }
+  }
+  return count;
+}
+
+#if CFG_TUSB_OS == OPT_OS_NONE
+volatile uint32_t system_ticks = 0;
+
+void SysTick_Handler(void) {
+  system_ticks++;
+}
+
+uint32_t tusb_time_millis_api(void) {
+  return system_ticks;
+}
+
+//--------------------------------------------------------------------+
+// USB Interrupt Handler
+//--------------------------------------------------------------------+
+void USB_IRQHandler(void) {
+  #if CFG_TUD_ENABLED
+  tud_int_handler(0);
+  #endif
+
+  #if CFG_TUH_ENABLED
+  tuh_int_handler(0, true);
+  #endif
+}
+
+#endif