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/*
* The MIT License (MIT)
*
* Copyright (c) 2018, hathach (tinyusb.org)
* Copyright (c) 2020, Koji Kitayama
*
* 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.
*/
/* metadata:
manufacturer: NXP
*/
#include "bsp/board_api.h"
#include "board.h"
#include "fsl_device_registers.h"
#include "fsl_gpio.h"
#include "fsl_port.h"
#include "fsl_clock.h"
#include "fsl_uart.h"
#include "fsl_sysmpu.h"
#include "common/tusb_fifo.h"
#include "board/clock_config.h"
#include "board/pin_mux.h"
#ifdef UART_DEV
// RX ring buffer filled by the RDRF interrupt so board_uart_read() is non-blocking
// and does not drop bytes to UART overrun (see stm32 family for reference).
static uint8_t uart_rx_ff_buf[32];
static tu_fifo_t uart_rx_ff;
void UART0_RX_TX_IRQHandler(void) {
if (UART_DEV->S1 & UART_S1_RDRF_MASK) {
uint8_t byte = UART_DEV->D; // reading S1 then D clears RDRF (and any overrun)
tu_fifo_write(&uart_rx_ff, &byte);
}
}
#endif
//--------------------------------------------------------------------+
// 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
}
void board_init(void) {
BOARD_InitBootPins();
BOARD_BootClockRUN();
SystemCoreClockUpdate();
SYSMPU_Enable(SYSMPU, 0);
#if CFG_TUSB_OS == OPT_OS_NONE
// 1ms tick timer
SysTick_Config(SystemCoreClock / 1000);
#elif CFG_TUSB_OS == OPT_OS_FREERTOS
// Explicitly disable systick to prevent its ISR from running before scheduler start
SysTick->CTRL &= ~1U;
// If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher )
NVIC_SetPriority(USB0_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY );
#endif
// LED
gpio_pin_config_t led_config = { kGPIO_DigitalOutput, 0 };
GPIO_PinInit(LED_PORT, LED_PIN, &led_config);
board_led_write(false);
#if defined(BUTTON_PORT) && defined(BUTTON_PIN)
gpio_pin_config_t button_config = { kGPIO_DigitalInput, 0 };
GPIO_PinInit(BUTTON_PORT, BUTTON_PIN, &button_config);
#endif
#ifdef UART_DEV
const uart_config_t uart_config = {
.baudRate_Bps = 115200UL,
.parityMode = kUART_ParityDisabled,
.stopBitCount = kUART_OneStopBit,
.txFifoWatermark = 0U,
.rxFifoWatermark = 1U,
.idleType = kUART_IdleTypeStartBit,
.enableTx = true,
.enableRx = true
};
UART_Init(UART_DEV, &uart_config, UART_CLOCK);
tu_fifo_config(&uart_rx_ff, uart_rx_ff_buf, sizeof(uart_rx_ff_buf), false);
UART_DEV->C2 |= UART_C2_RIE_MASK; // enable RX data register full interrupt
NVIC_EnableIRQ(UART0_RX_TX_IRQn);
#endif
// USB
// USB clock is configured in BOARD_BootClockRUN()
}
//--------------------------------------------------------------------+
// Board porting API
//--------------------------------------------------------------------+
void board_led_write(bool state) {
GPIO_PinWrite(LED_PORT, LED_PIN, state ? LED_STATE_ON : (1 - LED_STATE_ON));
}
uint32_t board_button_read(void) {
#if defined(BUTTON_PORT) && defined(BUTTON_PIN)
return BUTTON_STATE_ACTIVE == GPIO_PinRead(BUTTON_PORT, BUTTON_PIN);
#else
return 0;
#endif
}
int board_uart_read(uint8_t *buf, int len) {
#ifdef UART_DEV
return (int) tu_fifo_read_n(&uart_rx_ff, buf, (uint16_t) len);
#else
(void) buf;
(void) len;
return 0;
#endif
}
int board_uart_write(void const *buf, int len) {
#ifdef UART_DEV
const uint8_t *p = (const uint8_t *) buf;
int count = 0;
while (count < len) {
if (UART_DEV->S1 & UART_S1_TDRE_MASK) {
UART_DEV->D = p[count];
count++;
} else {
break;
}
}
return count;
#else
(void) buf;
(void) len;
return -1;
#endif
}
size_t board_get_unique_id(uint8_t id[], size_t max_len) {
(void) max_len;
// Kinetis 128-bit Unique Identification Register (SIM->UIDH/UIDMH/UIDML/UIDL)
uint32_t* id32 = (uint32_t*) (uintptr_t) id;
id32[0] = SIM->UIDH;
id32[1] = SIM->UIDMH;
id32[2] = SIM->UIDML;
id32[3] = SIM->UIDL;
return 16;
}
#if CFG_TUSB_OS == OPT_OS_NONE
volatile uint32_t system_ticks = 0;
void SysTick_Handler(void) {
system_ticks++;
}
uint32_t tusb_time_millis_api(void) {
return system_ticks;
}
#endif
#ifndef __ICCARM__
// Implement _start() since we use linker flag '-nostartfiles'.
// Requires defined __STARTUP_CLEAR_BSS,
extern int main(void);
TU_ATTR_UNUSED void _start(void) {
// called by startup code
main();
while (1) {}
}
#ifdef __clang__
void _exit (int __status) {
(void) __status;
while (1) {}
}
#endif
#endif
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