|
|
@@ -0,0 +1,200 @@
|
|
|
+/*
|
|
|
+ * 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 "chip.h"
|
|
|
+#include "../board.h"
|
|
|
+
|
|
|
+#define LED_PORT 1
|
|
|
+#define LED_PIN 0
|
|
|
+#define LED_STATE_ON 0
|
|
|
+
|
|
|
+// Wake up Switch
|
|
|
+#define BUTTON_PORT 0
|
|
|
+#define BUTTON_PIN 16
|
|
|
+#define BUTTON_STATE_ACTIVE 0
|
|
|
+
|
|
|
+/* System oscillator rate and RTC oscillator rate */
|
|
|
+const uint32_t OscRateIn = 12000000;
|
|
|
+const uint32_t RTCOscRateIn = 32768;
|
|
|
+
|
|
|
+/* Pin muxing table, only items that need changing from their default pin
|
|
|
+ state are in this table. Not every pin is mapped. */
|
|
|
+/* IOCON pin definitions for pin muxing */
|
|
|
+typedef struct {
|
|
|
+ uint32_t port : 8; /* Pin port */
|
|
|
+ uint32_t pin : 8; /* Pin number */
|
|
|
+ uint32_t modefunc : 16; /* Function and mode */
|
|
|
+} PINMUX_GRP_T;
|
|
|
+
|
|
|
+static const PINMUX_GRP_T pinmuxing[] =
|
|
|
+{
|
|
|
+ {0, 3, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // USB VBUS
|
|
|
+ {0, 6, (IOCON_FUNC1 | IOCON_MODE_INACT)}, /* PIO0_6 used for USB_CONNECT */
|
|
|
+
|
|
|
+ {0, 18, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 RX
|
|
|
+ {0, 19, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGMODE_EN)}, // UART0 TX
|
|
|
+};
|
|
|
+
|
|
|
+
|
|
|
+/* Setup system clocking */
|
|
|
+static void SystemSetupClocking(void)
|
|
|
+{
|
|
|
+ volatile int i;
|
|
|
+
|
|
|
+ /* Powerup main oscillator */
|
|
|
+ Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSOSC_PD);
|
|
|
+
|
|
|
+ /* Wait 200us for OSC to be stablized, no status
|
|
|
+ indication, dummy wait. */
|
|
|
+ for (i = 0; i < 0x100; i++) {}
|
|
|
+
|
|
|
+ /* Set system PLL input to main oscillator */
|
|
|
+ Chip_Clock_SetSystemPLLSource(SYSCTL_PLLCLKSRC_MAINOSC);
|
|
|
+
|
|
|
+ /* Power down PLL to change the PLL divider ratio */
|
|
|
+ Chip_SYSCTL_PowerDown(SYSCTL_POWERDOWN_SYSPLL_PD);
|
|
|
+
|
|
|
+ /* Setup PLL for main oscillator rate (FCLKIN = 12MHz) * 4 = 48MHz
|
|
|
+ MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
|
|
|
+ FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
|
|
|
+ FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
|
|
|
+ Chip_Clock_SetupSystemPLL(3, 1);
|
|
|
+
|
|
|
+ /* Powerup system PLL */
|
|
|
+ Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_SYSPLL_PD);
|
|
|
+
|
|
|
+ /* Wait for PLL to lock */
|
|
|
+ while (!Chip_Clock_IsSystemPLLLocked()) {}
|
|
|
+
|
|
|
+ /* Set system clock divider to 1 */
|
|
|
+ Chip_Clock_SetSysClockDiv(1);
|
|
|
+
|
|
|
+ /* Setup FLASH access to 3 clocks */
|
|
|
+ Chip_FMC_SetFLASHAccess(FLASHTIM_50MHZ_CPU);
|
|
|
+
|
|
|
+ /* Set main clock source to the system PLL. This will drive 48MHz
|
|
|
+ for the main clock and 48MHz for the system clock */
|
|
|
+ Chip_Clock_SetMainClockSource(SYSCTL_MAINCLKSRC_PLLOUT);
|
|
|
+
|
|
|
+ /* Set USB PLL input to main oscillator */
|
|
|
+ Chip_Clock_SetUSBPLLSource(SYSCTL_PLLCLKSRC_MAINOSC);
|
|
|
+ /* Setup USB PLL (FCLKIN = 12MHz) * 4 = 48MHz
|
|
|
+ MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
|
|
|
+ FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
|
|
|
+ FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
|
|
|
+ Chip_Clock_SetupUSBPLL(3, 1);
|
|
|
+
|
|
|
+ /* Powerup USB PLL */
|
|
|
+ Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPLL_PD);
|
|
|
+
|
|
|
+ /* Wait for PLL to lock */
|
|
|
+ while (!Chip_Clock_IsUSBPLLLocked()) {}
|
|
|
+}
|
|
|
+
|
|
|
+// Invoked by startup code
|
|
|
+void SystemInit(void)
|
|
|
+{
|
|
|
+ SystemSetupClocking();
|
|
|
+ Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_RAM1);
|
|
|
+
|
|
|
+ /* Enable IOCON clock */
|
|
|
+ Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);
|
|
|
+ for (uint32_t i = 0; i < (sizeof(pinmuxing) / sizeof(PINMUX_GRP_T)); i++)
|
|
|
+ {
|
|
|
+ Chip_IOCON_PinMuxSet(LPC_IOCON, pinmuxing[i].port, pinmuxing[i].pin, pinmuxing[i].modefunc);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+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
|
|
|
+ // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
|
|
|
+ NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
|
|
|
+#endif
|
|
|
+
|
|
|
+ Chip_GPIO_Init(LPC_GPIO);
|
|
|
+
|
|
|
+ // LED
|
|
|
+ Chip_GPIO_SetPinDIROutput(LPC_GPIO, LED_PORT, LED_PIN);
|
|
|
+
|
|
|
+ // Button
|
|
|
+ Chip_GPIO_SetPinDIRInput(LPC_GPIO, BUTTON_PORT, BUTTON_PIN);
|
|
|
+
|
|
|
+ // USB: Setup PLL clock, and power
|
|
|
+ /* enable USB main clock */
|
|
|
+ Chip_Clock_SetUSBClockSource(SYSCTL_USBCLKSRC_PLLOUT, 1);
|
|
|
+ /* Enable AHB clock to the USB block and USB RAM. */
|
|
|
+ Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USB);
|
|
|
+ Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_USBRAM);
|
|
|
+ /* power UP USB Phy */
|
|
|
+ Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_USBPAD_PD);
|
|
|
+}
|
|
|
+
|
|
|
+//--------------------------------------------------------------------+
|
|
|
+// 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)
|
|
|
+{
|
|
|
+ (void) buf;
|
|
|
+ (void) len;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int board_uart_write(void const * buf, int len)
|
|
|
+{
|
|
|
+ (void) buf;
|
|
|
+ (void) len;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+#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
|
hathach