add circuitpython code

1 files changed, 203 insertions, 0 deletions

diff --git a/circuitpython/lib/tinyusb/hw/bsp/msp432e4/family.c b/circuitpython/lib/tinyusb/hw/bsp/msp432e4/family.c
new file mode 100644
index 0000000..3d2d408
--- /dev/null
+++ b/circuitpython/lib/tinyusb/hw/bsp/msp432e4/family.c
@@ -0,0 +1,203 @@
+/*
+ * 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.
+ */
+
+#include "bsp/board.h"
+#include "board.h"
+#include "msp.h"
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USB0_IRQHandler(void)
+{
+#if CFG_TUH_ENABLED
+  tuh_int_handler(0);
+#endif
+#if CFG_TUD_ENABLED
+  tud_int_handler(0);
+#endif
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
+
+void board_init(void)
+{
+  unsigned bits;
+  /* Turn off power domains that unused peripherals belong to */
+  SYSCTL->PCCAN  = 0u;
+#ifdef __MCU_HAS_LCD0__
+  SYSCTL->PCLCD  = 0u;
+#endif
+  SYSCTL->PCEMAC = 0u;
+  SYSCTL->PCEPHY = 0u;
+  SYSCTL->PCCCM  = 0u;
+
+  /* --- Setup system clock --- */
+  /* Start power-up process of the main oscillator */
+  SYSCTL->MOSCCTL = SYSCTL_MOSCCTL_OSCRNG;
+  while (!(SYSCTL->RIS & SYSCTL_RIS_MOSCPUPRIS)) ; /* Wait for completion */
+  SYSCTL->MISC = SYSCTL_MISC_MOSCPUPMIS; /* Clear the completion interrupt status */
+  /* Set the main oscillator to PLL reference clock */
+  SYSCTL->RSCLKCFG = SYSCTL_RSCLKCFG_PLLSRC_MOSC;
+  /* PLL freq. = (MOSC freq. / 10) * 96 = 240MHz */
+  SYSCTL->PLLFREQ1 = (4 << SYSCTL_PLLFREQ1_N_S) | (1 << SYSCTL_PLLFREQ1_Q_S);
+  SYSCTL->PLLFREQ0 = (96 << SYSCTL_PLLFREQ0_MINT_S) | SYSCTL_PLLFREQ0_PLLPWR;
+  /* Set BCHT=6, BCE=0, WS=5 for 120MHz system clock */
+  SYSCTL->MEMTIM0 = SYSCTL_MEMTIM0_EBCHT_3_5 | (5 << SYSCTL_MEMTIM0_EWS_S) |
+    SYSCTL_MEMTIM0_FBCHT_3_5 | (5 << SYSCTL_MEMTIM0_FWS_S) | SYSCTL_MEMTIM0_MB1;
+  /* Wait for completion of PLL power-up process */
+  while (!(SYSCTL->RIS & SYSCTL_RIS_PLLLRIS)) ;
+  SYSCTL->MISC = SYSCTL_MISC_PLLLMIS; /* Clear the completion interrupt status */
+  /* Switch the system clock to PLL/4 */
+  SYSCTL->RSCLKCFG = SYSCTL_RSCLKCFG_MEMTIMU | SYSCTL_RSCLKCFG_ACG |
+         SYSCTL_RSCLKCFG_USEPLL | SYSCTL_RSCLKCFG_PLLSRC_MOSC | (1 << SYSCTL_RSCLKCFG_PSYSDIV_S);
+
+  SystemCoreClockUpdate();
+#if CFG_TUSB_OS == OPT_OS_NONE
+  SysTick_Config(SystemCoreClock / 1000);
+#elif CFG_TUSB_OS == OPT_OS_FREERTOS
+  // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
+  NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
+#endif
+
+  /* USR_LED1 ON1 */
+  bits              = TU_BIT(CLK_LED);
+  SYSCTL->RCGCGPIO |= bits;
+  while (bits != (SYSCTL->RCGCGPIO & bits)) ;
+  GPIO_LED->DIR     = TU_BIT(GPIO_LED_PIN);
+  GPIO_LED->DEN     = TU_BIT(GPIO_LED_PIN);
+
+  /* USR_SW1 PJ0 */
+  bits              = TU_BIT(CLK_BUTTON);
+  SYSCTL->RCGCGPIO |= bits;
+  while (bits != (SYSCTL->RCGCGPIO & bits)) ;
+  GPIO_BUTTON->PUR  = TU_BIT(GPIO_BUTTON_PIN);
+  GPIO_BUTTON->DEN  = TU_BIT(GPIO_BUTTON_PIN);
+
+  /* UART PA0,1 */
+  bits              = TU_BIT(0);
+  SYSCTL->RCGCGPIO |= bits;
+  while (bits != (SYSCTL->RCGCGPIO & bits)) ;
+  GPIOA->AFSEL      = 3u;
+  GPIOA->PCTL       = 0x11u;
+  GPIOA->DEN        = 3u;
+
+  SYSCTL->RCGCUART |= 1u << 0;
+  while (!(SYSCTL->PRUART & (1u << 0))) ;
+  UART0->CTL        = 0;
+  UART0->IBRD       = 8;  /* 8.68056 = 16MHz / (16 * 115200) */
+  UART0->FBRD       = 44; /* 0.6875 = 44/64 -> 115108bps (0.08%) */
+  UART0->LCRH       = UART_LCRH_WLEN_8 | UART_LCRH_FEN;
+  UART0->CC         = UART_CC_CS_PIOSC; /* Set the baud clock to PIOSC */
+  UART0->CTL        = UART_CTL_RXE | UART_CTL_TXE | UART_CTL_UARTEN;
+
+  /* USB PB0(ID) PB1(VBUS) PL6,7(DP,DM) */
+  bits              = TU_BIT(1) | TU_BIT(10);
+  SYSCTL->RCGCGPIO |= bits;
+  while (bits != (SYSCTL->RCGCGPIO & bits)) ;
+  GPIOB->AMSEL      = TU_BIT(0) | TU_BIT(1);
+  GPIOL->AMSEL      = TU_BIT(6) | TU_BIT(7);
+
+#if CFG_TUH_ENABLED
+  /* USB PD6(EPEN) */
+  bits              = TU_BIT(3);
+  SYSCTL->RCGCGPIO |= bits;
+  while (bits != (SYSCTL->RCGCGPIO & bits)) ;
+  GPIOD->AFSEL      = TU_BIT(6);
+  GPIOD->PCTL       = 0x05000000u;
+  GPIOD->DEN        = TU_BIT(6);
+#endif
+
+  SYSCTL->RCGCUSB   = 1u; /* Open the clock gate for SYSCLK */
+  while (!(SYSCTL->PRUSB & (1u << 0))) ;
+  USB0->CC          = USB_CC_CLKEN | (3u << USB_CC_CLKDIV_S); /* 60MHz = 240MHz / 4 */
+  __DMB(); /* Wait for completion of opening of the clock gate */
+
+  SYSCTL->SRUSB     = 1u;
+  for (int i = 0; i < 16; ++i) __NOP();
+  SYSCTL->SRUSB     = 0u;
+
+  USB0->CC          = USB_CC_CLKEN | (3u << USB_CC_CLKDIV_S); /* 60MHz = 240MHz / 4 */
+  __DMB(); /* Wait for completion of opening of the clock gate */
+#if CFG_TUH_ENABLED
+  USB0->GPCS = USB_GPCS_DEVMOD_OTG;
+  USB0->EPC  = USB_EPC_EPENDE | USB_EPC_EPEN_HIGH;
+#endif
+#if CFG_TUD_ENABLED
+  USB0->GPCS = USB_GPCS_DEVMOD_DEVVBUS;
+#endif
+}
+
+//--------------------------------------------------------------------+
+// Board porting API
+//--------------------------------------------------------------------+
+
+void board_led_write(bool state)
+{
+  if (state)
+    GPIO_LED->DATA |= TU_BIT(GPIO_LED_PIN);
+  else
+    GPIO_LED->DATA &= ~TU_BIT(GPIO_LED_PIN);
+}
+
+uint32_t board_button_read(void)
+{
+  return (GPIO_BUTTON->DATA & TU_BIT(GPIO_BUTTON_PIN)) ? 0u : 1u;
+}
+
+int board_uart_read(uint8_t * buf, int len)
+{
+  for (int i = 0; i < len; ++i) {
+    while (UART0->FR & UART_FR_RXFE) ;
+    *buf++ = UART0->DR;
+  }
+  return len;
+}
+
+int board_uart_write(void const * buf, int len)
+{
+  uint8_t const *p = (uint8_t const *)buf;
+  for (int i = 0; i < len; ++i) {
+    while (UART0->FR & UART_FR_TXFF) ;
+    UART0->DR = *p++;
+  }
+  return len;
+}
+
+#if CFG_TUSB_OS  == OPT_OS_NONE
+volatile uint32_t system_ticks = 0u;
+void SysTick_Handler(void)
+{
+  system_ticks++;
+}
+
+uint32_t board_millis(void)
+{
+  return system_ticks;
+}
+#endif