2021-10-23 08:14:28 +02:00
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/*
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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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2023-08-03 10:50:52 +02:00
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#include "bsp/board_api.h"
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2021-10-23 08:14:28 +02:00
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#include "board.h"
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#include "msp.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 USB0_IRQHandler(void)
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{
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2022-02-23 15:49:11 +01:00
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#if CFG_TUH_ENABLED
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2021-11-28 16:40:23 +01:00
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tuh_int_handler(0);
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#endif
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2022-02-23 15:46:40 +01:00
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#if CFG_TUD_ENABLED
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2021-10-23 08:14:28 +02:00
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tud_int_handler(0);
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2021-11-28 16:40:23 +01:00
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#endif
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2021-10-23 08:14:28 +02:00
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}
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM
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//--------------------------------------------------------------------+
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void board_init(void)
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{
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2021-11-28 16:40:23 +01:00
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unsigned bits;
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2021-10-23 08:14:28 +02:00
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/* Turn off power domains that unused peripherals belong to */
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SYSCTL->PCCAN = 0u;
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#ifdef __MCU_HAS_LCD0__
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SYSCTL->PCLCD = 0u;
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#endif
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SYSCTL->PCEMAC = 0u;
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SYSCTL->PCEPHY = 0u;
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SYSCTL->PCCCM = 0u;
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/* --- Setup system clock --- */
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/* Start power-up process of the main oscillator */
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SYSCTL->MOSCCTL = SYSCTL_MOSCCTL_OSCRNG;
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while (!(SYSCTL->RIS & SYSCTL_RIS_MOSCPUPRIS)) ; /* Wait for completion */
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SYSCTL->MISC = SYSCTL_MISC_MOSCPUPMIS; /* Clear the completion interrupt status */
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/* Set the main oscillator to PLL reference clock */
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SYSCTL->RSCLKCFG = SYSCTL_RSCLKCFG_PLLSRC_MOSC;
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/* PLL freq. = (MOSC freq. / 10) * 96 = 240MHz */
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SYSCTL->PLLFREQ1 = (4 << SYSCTL_PLLFREQ1_N_S) | (1 << SYSCTL_PLLFREQ1_Q_S);
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SYSCTL->PLLFREQ0 = (96 << SYSCTL_PLLFREQ0_MINT_S) | SYSCTL_PLLFREQ0_PLLPWR;
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/* Set BCHT=6, BCE=0, WS=5 for 120MHz system clock */
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SYSCTL->MEMTIM0 = SYSCTL_MEMTIM0_EBCHT_3_5 | (5 << SYSCTL_MEMTIM0_EWS_S) |
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SYSCTL_MEMTIM0_FBCHT_3_5 | (5 << SYSCTL_MEMTIM0_FWS_S) | SYSCTL_MEMTIM0_MB1;
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/* Wait for completion of PLL power-up process */
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while (!(SYSCTL->RIS & SYSCTL_RIS_PLLLRIS)) ;
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SYSCTL->MISC = SYSCTL_MISC_PLLLMIS; /* Clear the completion interrupt status */
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/* Switch the system clock to PLL/4 */
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SYSCTL->RSCLKCFG = SYSCTL_RSCLKCFG_MEMTIMU | SYSCTL_RSCLKCFG_ACG |
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SYSCTL_RSCLKCFG_USEPLL | SYSCTL_RSCLKCFG_PLLSRC_MOSC | (1 << SYSCTL_RSCLKCFG_PSYSDIV_S);
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SystemCoreClockUpdate();
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#if CFG_TUSB_OS == OPT_OS_NONE
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SysTick_Config(SystemCoreClock / 1000);
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2021-11-05 12:14:59 +01:00
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#elif CFG_TUSB_OS == OPT_OS_FREERTOS
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// If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
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NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
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2021-10-23 08:14:28 +02:00
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#endif
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2021-11-06 11:32:15 +01:00
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/* USR_LED1 ON1 */
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2021-11-28 16:40:23 +01:00
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bits = TU_BIT(CLK_LED);
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SYSCTL->RCGCGPIO |= bits;
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while (bits != (SYSCTL->RCGCGPIO & bits)) ;
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2021-11-06 11:32:15 +01:00
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GPIO_LED->DIR = TU_BIT(GPIO_LED_PIN);
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GPIO_LED->DEN = TU_BIT(GPIO_LED_PIN);
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2021-10-23 08:14:28 +02:00
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/* USR_SW1 PJ0 */
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2021-11-28 16:40:23 +01:00
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bits = TU_BIT(CLK_BUTTON);
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SYSCTL->RCGCGPIO |= bits;
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while (bits != (SYSCTL->RCGCGPIO & bits)) ;
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2021-11-06 11:32:15 +01:00
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GPIO_BUTTON->PUR = TU_BIT(GPIO_BUTTON_PIN);
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GPIO_BUTTON->DEN = TU_BIT(GPIO_BUTTON_PIN);
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2021-10-23 08:14:28 +02:00
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/* UART PA0,1 */
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2021-11-28 16:40:23 +01:00
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bits = TU_BIT(0);
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SYSCTL->RCGCGPIO |= bits;
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while (bits != (SYSCTL->RCGCGPIO & bits)) ;
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2021-10-23 08:14:28 +02:00
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GPIOA->AFSEL = 3u;
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GPIOA->PCTL = 0x11u;
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GPIOA->DEN = 3u;
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SYSCTL->RCGCUART |= 1u << 0;
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while (!(SYSCTL->PRUART & (1u << 0))) ;
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UART0->CTL = 0;
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UART0->IBRD = 8; /* 8.68056 = 16MHz / (16 * 115200) */
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UART0->FBRD = 44; /* 0.6875 = 44/64 -> 115108bps (0.08%) */
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UART0->LCRH = UART_LCRH_WLEN_8 | UART_LCRH_FEN;
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UART0->CC = UART_CC_CS_PIOSC; /* Set the baud clock to PIOSC */
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UART0->CTL = UART_CTL_RXE | UART_CTL_TXE | UART_CTL_UARTEN;
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2021-11-28 16:40:23 +01:00
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/* USB PB0(ID) PB1(VBUS) PL6,7(DP,DM) */
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bits = TU_BIT(1) | TU_BIT(10);
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SYSCTL->RCGCGPIO |= bits;
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while (bits != (SYSCTL->RCGCGPIO & bits)) ;
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GPIOB->AMSEL = TU_BIT(0) | TU_BIT(1);
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GPIOL->AMSEL = TU_BIT(6) | TU_BIT(7);
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2022-02-23 15:49:11 +01:00
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#if CFG_TUH_ENABLED
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2021-11-28 16:40:23 +01:00
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/* USB PD6(EPEN) */
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bits = TU_BIT(3);
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SYSCTL->RCGCGPIO |= bits;
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while (bits != (SYSCTL->RCGCGPIO & bits)) ;
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GPIOD->AFSEL = TU_BIT(6);
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GPIOD->PCTL = 0x05000000u;
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GPIOD->DEN = TU_BIT(6);
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#endif
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2021-10-23 08:14:28 +02:00
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SYSCTL->RCGCUSB = 1u; /* Open the clock gate for SYSCLK */
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while (!(SYSCTL->PRUSB & (1u << 0))) ;
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USB0->CC = USB_CC_CLKEN | (3u << USB_CC_CLKDIV_S); /* 60MHz = 240MHz / 4 */
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__DMB(); /* Wait for completion of opening of the clock gate */
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SYSCTL->SRUSB = 1u;
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for (int i = 0; i < 16; ++i) __NOP();
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SYSCTL->SRUSB = 0u;
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2021-10-30 16:41:23 +02:00
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USB0->CC = USB_CC_CLKEN | (3u << USB_CC_CLKDIV_S); /* 60MHz = 240MHz / 4 */
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__DMB(); /* Wait for completion of opening of the clock gate */
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2022-02-23 15:49:11 +01:00
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#if CFG_TUH_ENABLED
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2021-11-28 16:40:23 +01:00
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USB0->GPCS = USB_GPCS_DEVMOD_OTG;
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USB0->EPC = USB_EPC_EPENDE | USB_EPC_EPEN_HIGH;
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#endif
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2022-02-23 15:46:40 +01:00
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#if CFG_TUD_ENABLED
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2021-11-28 16:40:23 +01:00
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USB0->GPCS = USB_GPCS_DEVMOD_DEVVBUS;
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#endif
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2021-10-23 08:14:28 +02:00
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}
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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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if (state)
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2021-11-06 11:32:15 +01:00
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GPIO_LED->DATA |= TU_BIT(GPIO_LED_PIN);
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2021-10-23 08:14:28 +02:00
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else
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2021-11-06 11:32:15 +01:00
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GPIO_LED->DATA &= ~TU_BIT(GPIO_LED_PIN);
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2021-10-23 08:14:28 +02:00
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}
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uint32_t board_button_read(void)
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{
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2021-11-06 11:32:15 +01:00
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return (GPIO_BUTTON->DATA & TU_BIT(GPIO_BUTTON_PIN)) ? 0u : 1u;
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2021-10-23 08:14:28 +02:00
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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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for (int i = 0; i < len; ++i) {
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while (UART0->FR & UART_FR_RXFE) ;
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*buf++ = UART0->DR;
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}
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return len;
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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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uint8_t const *p = (uint8_t const *)buf;
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for (int i = 0; i < len; ++i) {
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while (UART0->FR & UART_FR_TXFF) ;
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UART0->DR = *p++;
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}
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return len;
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}
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#if CFG_TUSB_OS == OPT_OS_NONE
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volatile uint32_t system_ticks = 0u;
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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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