160 lines
4.5 KiB
C
160 lines
4.5 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019, hathach (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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*/
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#include "sam.h"
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#include "bsp/board_api.h"
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#include "peripheral_clk_config.h"
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#include "hpl/usart/hpl_usart_base.h"
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#include "hpl/pmc/hpl_pmc.h"
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#include "hal/include/hal_init.h"
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#include "hal/include/hal_usart_async.h"
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#include "hal/include/hal_gpio.h"
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// You can get the board here:
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// https://www.aliexpress.com/item/1005003173783268.html
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM DECLARATION
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//--------------------------------------------------------------------+
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#define LED_PIN GPIO(GPIO_PORTA, 15)
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#define BUTTON_PIN GPIO(GPIO_PORTA, 21)
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#define BUTTON_STATE_ACTIVE 0
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#define UART_TX_PIN GPIO(GPIO_PORTB, 1)
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#define UART_RX_PIN GPIO(GPIO_PORTB, 0)
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static struct usart_async_descriptor edbg_com;
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static uint8_t edbg_com_buffer[64];
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static volatile bool uart_busy = false;
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static void tx_cb_EDBG_COM(const struct usart_async_descriptor *const io_descr)
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{
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(void) io_descr;
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uart_busy = false;
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}
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//------------- IMPLEMENTATION -------------//
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void board_init(void)
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{
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init_mcu();
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/* Disable Watchdog */
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hri_wdt_set_MR_WDDIS_bit(WDT);
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// LED
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_pmc_enable_periph_clock(ID_PIOB);
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gpio_set_pin_level(LED_PIN, false);
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gpio_set_pin_direction(LED_PIN, GPIO_DIRECTION_OUT);
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gpio_set_pin_function(LED_PIN, GPIO_PIN_FUNCTION_OFF);
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// Button
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_pmc_enable_periph_clock(ID_PIOA);
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gpio_set_pin_direction(BUTTON_PIN, GPIO_DIRECTION_IN);
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gpio_set_pin_pull_mode(BUTTON_PIN, GPIO_PULL_UP);
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gpio_set_pin_function(BUTTON_PIN, GPIO_PIN_FUNCTION_OFF);
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// Uart via EDBG Com
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_pmc_enable_periph_clock(ID_USART1);
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gpio_set_pin_function(UART_RX_PIN, MUX_PA21A_USART1_RXD1);
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gpio_set_pin_function(UART_TX_PIN, MUX_PB4D_USART1_TXD1);
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usart_async_init(&edbg_com, USART1, edbg_com_buffer, sizeof(edbg_com_buffer), _usart_get_usart_async());
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usart_async_set_baud_rate(&edbg_com, CFG_BOARD_UART_BAUDRATE);
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usart_async_register_callback(&edbg_com, USART_ASYNC_TXC_CB, tx_cb_EDBG_COM);
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usart_async_enable(&edbg_com);
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#if CFG_TUSB_OS == OPT_OS_NONE
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// 1ms tick timer (samd SystemCoreClock may not correct)
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SysTick_Config(CONF_CPU_FREQUENCY / 1000);
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#endif
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// Enable USB clock
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_pmc_enable_periph_clock(ID_USBHS);
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}
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//--------------------------------------------------------------------+
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// USB Interrupt Handler
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//--------------------------------------------------------------------+
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void USBHS_Handler(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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// 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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gpio_set_pin_level(LED_PIN, state);
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}
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uint32_t board_button_read(void)
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{
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return BUTTON_STATE_ACTIVE == gpio_get_pin_level(BUTTON_PIN);
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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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// while until previous transfer is complete
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while(uart_busy) {}
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uart_busy = true;
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io_write(&edbg_com.io, buf, len);
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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 = 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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// Required by __libc_init_array in startup code if we are compiling using
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// -nostdlib/-nostartfiles.
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void _init(void)
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{
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}
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