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ea23c905d3
The Busware HUL v1.1 dongle is a product very similar to the rzusb dongle but with the at86rf212 instead of the at86rf230 transceiver. Some code refactoring has been made in order to better support multiple hardware targets. This includes: The reset_rf functions are now in the board specific files. The led functions are now in the board specific files. The register read/write functions are moved from mac.c to the generic board.c file as they are used by functions like reset_rf that are not within the mac.c file. Also the subreg_read and subreg_write functions were introduced for convenience. The function to change state is now also in board.c. The hardware types are moved into the atusb.h file (which is always synchrornized with the linux atusb driver) because they are now used by the driver to identify and configure the hardware. Within the makefile a new target name is specified called: hulusb Signed-off-by: Josef Filzmaier <j.filzmaier@gmx.at>
170 lines
3.3 KiB
C
170 lines
3.3 KiB
C
/*
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* fw/board_rzusb.c - RZUSB Board-specific functions (for boot loader and application)
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*
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* Written 2016 by Stefan Schmidt
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* Copyright 2016 Stefan Schmidt
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/boot.h>
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#define F_CPU 8000000UL
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#include <util/delay.h>
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#include "usb.h"
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#include "at86rf230.h"
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#include "board.h"
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#include "spi.h"
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#include "usb/usb.h"
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static bool spi_initialized = 0;
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void reset_rf(void)
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{
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/* set up all the outputs; default port value is 0 */
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DDRB = 0;
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DDRC = 0;
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DDRD = 0;
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PORTB = 0;
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PORTC = 0;
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PORTD = 0;
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OUT(LED);
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OUT(nRST_RF); /* this also resets the transceiver */
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OUT(SLP_TR);
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spi_init();
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/* AT86RF231 data sheet, 12.4.13, reset pulse width: 625 ns (min) */
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CLR(nRST_RF);
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_delay_us(2);
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SET(nRST_RF);
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/* 12.4.14: SPI access latency after reset: 625 ns (min) */
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_delay_us(2);
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/* we must restore TRX_CTRL_0 after each reset (9.6.4) */
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set_clkm();
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}
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void led(bool on)
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{
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if (on)
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SET(LED);
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else
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CLR(LED);
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}
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void set_clkm(void)
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{
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/* switch CLKM to 8 MHz */
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/*
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* @@@ Note: Atmel advise against changing the external clock in
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* mid-flight. We should therefore switch to the RC clock first, then
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* crank up the external clock, and finally switch back to the external
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* clock. The clock switching procedure is described in the ATmega32U2
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* data sheet in secton 8.2.2.
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*/
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spi_begin();
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spi_send(AT86RF230_REG_WRITE | REG_TRX_CTRL_0);
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spi_send(0x10);
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spi_end();
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/* TX_AUTO_CRC_ON, default disabled */
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spi_begin();
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spi_send(AT86RF230_REG_WRITE | 0x05);
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spi_send(0x80);
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spi_end();
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}
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void board_init(void)
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{
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/* Disable the watchdog timer */
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MCUSR = 0; /* Remove override */
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WDTCSR |= 1 << WDCE; /* Enable change */
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WDTCSR = 1 << WDCE; /* Disable watchdog while still enabling
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change */
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CLKPR = 1 << CLKPCE;
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/* We start with a 16 MHz/8 clock. Put the prescaler to 2. */
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CLKPR = 1 << CLKPS0;
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get_sernum();
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}
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void spi_begin(void)
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{
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if (!spi_initialized)
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spi_init();
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CLR(nSS);
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}
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void spi_off(void)
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{
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spi_initialized = 0;
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SPCR &= ~(1 << SPE);
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}
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void spi_init(void)
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{
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SET(nSS);
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OUT(SCLK);
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OUT(MOSI);
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OUT(nSS);
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IN(MISO);
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SPCR = (1 << SPE) | (1 << MSTR);
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SPSR = (1 << SPI2X);
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spi_initialized = 1;
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}
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void usb_init(void)
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{
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USBCON |= 1 << FRZCLK; /* freeze the clock */
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/* enable the PLL and wait for it to lock */
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/* TODO sheet page 50 For Atmel AT90USB128x only. Do not use with Atmel AT90USB64x. */
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/* FOR 8 XTAL Mhz only!!! */
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PLLCSR = ((1 << PLLP1) | (1 << PLLP0));
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PLLCSR |= 1 << PLLE;
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while (!(PLLCSR & (1 << PLOCK)));
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UHWCON |= (1 << UVREGE);
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USBCON &= ~((1 << USBE) | (1 << OTGPADE)); /* reset the controller */
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USBCON |= ((1 << USBE) | (1 << OTGPADE));
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USBCON &= ~(1 << FRZCLK); /* thaw the clock */
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UDCON &= ~(1 << DETACH); /* attach the pull-up */
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UDIEN = 1 << EORSTE; /* enable device interrupts */
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// UDCON |= 1 << RSTCPU; /* reset CPU on bus reset */
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ep_init();
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}
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void board_app_init(void)
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{
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/* enable timer input capture 1, trigger on rising edge */
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TCCR1B = (1 << ICES1);
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TIFR1 = (1 << ICF1);
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TIMSK1 = (1 << ICIE1);
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}
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