154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include "bsp/board_api.h"
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#include "NuMicro.h"
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#include "clk.h"
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#include "sys.h"
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//--------------------------------------------------------------------+
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// Forward USB interrupt events to TinyUSB IRQ Handler
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//--------------------------------------------------------------------+
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void USBD_IRQHandler(void)
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{
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tud_int_handler(0);
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}
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM
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//--------------------------------------------------------------------+
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#define LED_PORT PC
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#define LED_PIN 9
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#define LED_PIN_IO PC9
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#define LED_STATE_ON 0
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#define CRYSTAL_LESS /* system will be 48MHz when defined, otherwise, system is 72MHz */
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#define HIRC48_AUTO_TRIM SYS_IRCTCTL1_REFCKSEL_Msk | (1UL << SYS_IRCTCTL1_LOOPSEL_Pos) | (2UL << SYS_IRCTCTL1_FREQSEL_Pos)
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#define TRIM_INIT (SYS_BASE+0x118)
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void board_init(void)
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{
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/* Unlock protected registers */
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SYS_UnlockReg();
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init System Clock */
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/*---------------------------------------------------------------------------------------------------------*/
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/* Enable Internal RC 22.1184 MHz clock */
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CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
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/* Waiting for Internal RC clock ready */
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CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
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/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
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#ifndef CRYSTAL_LESS
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/* Enable external XTAL 12 MHz clock */
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CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
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/* Waiting for external XTAL clock ready */
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CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
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/* Set core clock */
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CLK_SetCoreClock(72000000);
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/* Use HIRC as UART clock source */
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CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
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/* Use PLL as USB clock source */
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CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_PLL, CLK_CLKDIV0_USB(3));
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#else
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/* Enable Internal RC 48MHz clock */
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CLK_EnableXtalRC(CLK_PWRCTL_HIRC48EN_Msk);
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/* Waiting for Internal RC clock ready */
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CLK_WaitClockReady(CLK_STATUS_HIRC48STB_Msk);
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/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC48, CLK_CLKDIV0_HCLK(1));
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/* Use HIRC as UART clock source */
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CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART(1));
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/* Use HIRC48 as USB clock source */
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CLK_SetModuleClock(USBD_MODULE, CLK_CLKSEL3_USBDSEL_HIRC48, CLK_CLKDIV0_USB(1));
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#endif
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/* Enable module clock */
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CLK_EnableModuleClock(USBD_MODULE);
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#if CFG_TUSB_OS == OPT_OS_NONE
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// 1ms tick timer
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SysTick_Config(48000000 / 1000);
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#endif
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// LED
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GPIO_SetMode(LED_PORT, 1 << LED_PIN, GPIO_MODE_OUTPUT);
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}
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#if CFG_TUSB_OS == OPT_OS_NONE
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volatile uint32_t system_ticks = 0;
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void SysTick_Handler (void)
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{
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system_ticks++;
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}
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uint32_t board_millis(void)
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{
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return system_ticks;
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}
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#endif
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//--------------------------------------------------------------------+
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// Board porting API
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//--------------------------------------------------------------------+
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void board_led_write(bool state)
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{
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LED_PIN_IO = (state ? LED_STATE_ON : (1-LED_STATE_ON));
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}
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uint32_t board_button_read(void)
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{
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return 0;
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}
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int board_uart_read(uint8_t* buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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int board_uart_write(void const * buf, int len)
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{
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(void) buf; (void) len;
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return 0;
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}
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