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tools/atrf-xtal: new utility to measure the crystal frequency
- Makefile (DIRS): added atrf-xtal - atrf-xtal/Makefile: build atrf-xtal for the Ben or do nothing elsewhere - atrf-xtal/atrf-xtal.h, atrf-xtal/atrf-xtal.c: diagnostic utility to determine the transceiver's crystal frequency - atrf-xtal/atben.c: dirty low-level driver for ATBEN
This commit is contained in:
Werner Almesberger
parent
fe2720e63a
commit
28e7f25585
@ -11,7 +11,8 @@
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#
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DIRS=atrf-id atrf-reset atrf-rssi atrf-trim atrf-txrx
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DIRS=atrf-id atrf-reset atrf-rssi atrf-trim atrf-txrx \
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atrf-xtal
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TARGET_ONLY_DIRS=lib
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ifeq ($(TARGET),ben_jlime)
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44
tools/atrf-xtal/Makefile
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44
tools/atrf-xtal/Makefile
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@ -0,0 +1,44 @@
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#
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# atrf-xtal/Makefile - Build the crystal diagnostic utility
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#
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# Written 2010, 2011 by Werner Almesberger
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# Copyright 2010, 2011 Werner Almesberger
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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ifeq ($(TARGET),)
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TARGET = host
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endif
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ifeq ($(TARGET),host)
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.PHONY: all install uninstall clean spotless
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all:
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install:
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uninstall:
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clean:
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spotless:
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else
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MAIN = atrf-xtal
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include ../Makefile.common
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CFLAGS += -O9
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OBJS_$(TARGET) = atben.o
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$(MAIN): $(OBJS_$(TARGET))
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endif
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142
tools/atrf-xtal/atben.c
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142
tools/atrf-xtal/atben.c
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@ -0,0 +1,142 @@
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/*
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* atrf-xtal/atben.c - ATBEN-specific low-level driver
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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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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/*
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* WARNING: this program does very nasty things to the Ben and it doesn't
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* like company. In particular, it resents:
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*
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* - the MMC driver - disable it with
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* echo jz4740-mmc.0 >/sys/bus/platform/drivers/jz4740-mmc/unbind
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* - the AT86RF230/1 kernel driver - use a kernel that doesn't have it
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* - anything that accesses the screen - kill GUI, X server, etc.
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* - the screen blanker - either disable it or make sure the screen stays
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* dark, e.g., with
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* echo 1 >/sys/devices/platform/jz4740-fb/graphics/fb0/blank
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* - probably a fair number of other daemons and things as well - best to
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* kill them all.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include "at86rf230.h"
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#include "atrf.h"
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#include "atrf-xtal.h"
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#define MAX_COUNT (1000*1000)
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static volatile void *base;
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static volatile uint32_t *clkgr;
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static uint32_t old_clkgr;
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void atben_setup(struct atrf_dsc *dsc, int size, int trim)
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{
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static uint8_t buf[127];
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atrf_reset_rf(dsc);
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atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TRX_OFF);
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atrf_reg_write(dsc, REG_XOSC_CTRL,
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(XTAL_MODE_INT << XTAL_MODE_SHIFT) | trim);
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/* minimum TX power, maximize delays, disable CRC */
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switch (atrf_identify(dsc)) {
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case artf_at86rf230:
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atrf_reg_write(dsc, REG_PHY_TX_PWR, 0xf);
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break;
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case artf_at86rf231:
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atrf_reg_write(dsc, REG_PHY_TX_PWR, 0xff);
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atrf_reg_write(dsc, REG_TRX_CTRL_1, 0);
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break;
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default:
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abort();
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}
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atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_PLL_ON);
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usleep(200); /* nominally 180 us worst-case */
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atrf_buf_write(dsc, buf, size);
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//atrf_reg_write(dsc, REG_IRQ_MASK, IRQ_TRX_END);
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atrf_reg_write(dsc, REG_IRQ_MASK, 0xff);
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mlockall(MCL_CURRENT);
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struct atrf_dsc {
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void *driver;
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void *handle;
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int chip_id;
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};
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struct atben_dsc {
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int fd;
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void *mem;
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};
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base = ((struct atben_dsc *) ((struct atrf_dsc *) dsc)->handle)->mem;
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clkgr = base+0x20;
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old_clkgr = *clkgr;
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*clkgr = old_clkgr | 1 << 10;
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}
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unsigned atben_sample(struct atrf_dsc *dsc)
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{
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unsigned i = MAX_COUNT;
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(void) atrf_reg_read(dsc, REG_IRQ_STATUS);
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#if 0
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while (i) {
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if (atrf_interrupt(dsc))
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break;
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i--;
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}
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#else
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volatile uint32_t *pdpin = base+0x10300;
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volatile uint32_t *pddats = base+0x10314;
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volatile uint32_t *pddatc = base+0x10318;
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volatile uint32_t *icmr = base+0x1004;
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volatile uint32_t *icmsr = base+0x1008;
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volatile uint32_t *icmcr = base+0x100c;
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#if 0
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atrf_slp_tr(dsc, 1);
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while (i) {
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if (*pdpin & 0x1000)
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break;
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i--;
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}
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atrf_slp_tr(dsc, 0);
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#endif
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uint32_t old_icmr = *icmr;
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*icmsr = 0xffffffff;
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*pddats = 1 << 9;
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*pddatc = 1 << 9;
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do i--;
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while (!(*pdpin & 0x1000));
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*icmcr = ~old_icmr;
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#endif
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return MAX_COUNT-i;
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}
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void atben_cleanup(struct atrf_dsc *dsc)
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{
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*clkgr = old_clkgr;
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}
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170
tools/atrf-xtal/atrf-xtal.c
Normal file
170
tools/atrf-xtal/atrf-xtal.c
Normal file
@ -0,0 +1,170 @@
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/*
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* atrf-xtal/atrf-xtal.c - AT86RF230/1 crystal diagnostic utility
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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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 <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "atrf.h"
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#include "atrf-xtal.h"
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#define DEFAULT_SIZE 127
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#define DEFAULT_TRIM 8
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static void setup(struct atrf_dsc *dsc, int size, int trim)
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{
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#ifdef __mips__
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atben_setup(dsc, size, trim);
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#else
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#error Only ATBEN is supported for now
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#endif
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}
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unsigned sample(struct atrf_dsc *dsc)
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{
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#ifdef __mips__
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return atben_sample(dsc);
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#else
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#error Only ATBEN is supported for now
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#endif
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}
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void cleanup(struct atrf_dsc *dsc)
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{
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#ifdef __mips__
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atben_cleanup(dsc);
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#else
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#error Only ATBEN is supported for now
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#endif
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}
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static int cmp(const void *a, const void *b)
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{
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return *(unsigned *) a-*(unsigned *) b;
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}
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static void eval(unsigned *res, int rep)
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{
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double sum = 0;
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int n = 0;
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int i;
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qsort(res, rep, sizeof(*res), cmp);
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if (rep < 8) {
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printf("%u\n", res[rep >> 1]);
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return;
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}
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for (i = rep/8; i != rep-rep/8; i++) {
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sum += res[i];
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n++;
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}
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printf("%f\n", (double) sum/n);
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}
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static void usage(const char *name)
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{
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fprintf(stderr,
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"%s [-d] [-s size] [-t trim] [repetitions]\n"
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" -d instead of printing a mean value, dump all samples\n"
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" -s size payload size in bytes, 0-127 (default: %d bytes)\n"
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" -t trim trim capacitor setting, 0-15 (default: %d)\n"
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" repetitions number of measurements (default: 1)\n"
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, name, DEFAULT_SIZE, DEFAULT_TRIM);
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exit(1);
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}
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int main(int argc, char *const *argv)
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{
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struct atrf_dsc *dsc;
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int size = DEFAULT_SIZE;
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int trim = DEFAULT_TRIM;
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int rep = 1;
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int dump = 0;
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char *end;
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unsigned *res;
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int c, i;
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while ((c = getopt(argc, argv, "ds:t:")) != EOF)
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switch (c) {
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case 'd':
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dump = 1;
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break;
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case 's':
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size = strtoul(optarg, &end, 0);
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if (*end)
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usage(*argv);
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if (size > 127)
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usage(*argv);
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break;
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case 't':
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trim = strtoul(optarg, &end, 0);
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if (*end)
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usage(*argv);
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if (trim > 15)
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usage(*argv);
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break;
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default:
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usage(*argv);
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}
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switch (argc-optind) {
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case 0:
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break;
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case 1:
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rep = strtoul(argv[optind], &end, 0);
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if (*end)
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usage(*argv);
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break;
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default:
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usage(*argv);
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}
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res = malloc(rep*sizeof(*res));
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if (!res) {
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perror("malloc");
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exit(1);
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}
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dsc = atrf_open();
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if (!dsc)
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return 1;
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setup(dsc, size, trim);
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for (i = 0; i != rep; i++)
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res[i] = sample(dsc);
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cleanup(dsc);
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atrf_close(dsc);
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if (dump) {
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for (i = 0; i != rep; i++)
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printf("%u\n", res[i]);
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exit(0);
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}
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eval(res, rep);
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return 0;
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}
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24
tools/atrf-xtal/atrf-xtal.h
Normal file
24
tools/atrf-xtal/atrf-xtal.h
Normal file
@ -0,0 +1,24 @@
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/*
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* atrf-xtal/atrf-xtal.h - AT86RF230/1 crystal diagnostic utility
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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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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#ifndef ATRF_XTAL_H
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#define ATRF_XTAL_H
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#include "atrf.h"
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void atben_setup(struct atrf_dsc *dsc, int size, int trim);
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unsigned atben_sample(struct atrf_dsc *dsc);
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void atben_cleanup(struct atrf_dsc *dsc);
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#endif /* !ATRF_XTAL_H */
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