kopia lustrzana https://github.com/bristol-seds/pico-tracker
Added XOSC clock measurement. Requires hardware modifications
Richard Meadows
rodzic
ecf9c7b546
commit
9c581b5a05
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@ -3,14 +3,30 @@
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| Type | Peripheral | Function | Notes
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| --- | --- | --- | ---
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|*GLCK*|
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||gclk0|main|2MHz??
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||gclk0|main clock, internal osc8m|4 MHz
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||gclk1|tcxo clock, fed from xosc
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|*TC*||
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||tc0|
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||tc1|
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||tc3|there was the txco on glck_io[3], but the pin voltages didn't work
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||tc5|pwm
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||tc0|telemetry tick timer (has timepulse input)
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||tc1|^^^^^
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||tc2|counts cycles of tcxo. 32-bit
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||tc3|^^^^^
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||tc4|osc8m event source
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||tc5|pwm 8-bit
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|*event channels*|
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||0|event source for timer 2 xosc measurement
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||1|tc4 retrigger
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|*SERCOM*||
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||sercom0|spi flash
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||sercom1|ublox gps
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||sercom2|
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||sercom3|radio|currently bitbanged as required pin layout broken in sercom
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## SAM D20 Interrupts usage
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| Name | Function | Notes
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| --- | --- | --- | ---
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|TC0_IRQn|
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|TC2_IRQn|xosc measurement done|
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@ -70,8 +70,9 @@
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#define GPS_SERCOM_MUX USART_RX_1_TX_0_XCK_1
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#define GPS_PLATFORM_MODEL UBX_PLATFORM_MODEL_AIRBORNE_1G
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#define GPS_TIMEPULSE_PIN PIN_PA05
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#define GPS_TIMEPULSE_PINMUX PINMUX_PA05F_TC0_WO1
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#define GPS_TIMEPULSE_FREQ 10
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#define GPS_TIMEPULSE_PINMUX PINMUX_PA05A_EIC_EXTINT5
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#define GPS_TIMEPULSE_FREQ 2
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#define GPS_TIMEPULSE_EXTINT 5
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/**
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* USART Loopback Testing
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@ -115,12 +116,14 @@
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#define SI406X_GPIO0_PIN PIN_PA27
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#define SI406X_GPIO1_PIN PIN_PA25
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#define SI406X_GPIO1_PINMUX PINMUX_PA25F_TC5_WO1
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#define SI406X_TCXO_PIN PIN_PA17
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#define SI406X_TCXO_PINMUX PINMUX_PA17H_GCLK_IO3
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#define SI406X_TCXO_GCLK GCLK_GENERATOR_3
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#define SI406X_TCXO_FREQUENCY 16369000
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/**
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* XOSC
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*/
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#define XOSC_FREQUENCY 16369000
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#define XOSC_COUNT_RESOLUTION 4
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/**
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* Watchdog Timer
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*/
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@ -1,31 +0,0 @@
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/*
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* Functions for turning the GPS timepulse into a HF Clock
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* Copyright (C) 2014 Richard Meadows <richardeoin>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef TIMEPULSE_H
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#define TIMEPULSE_H
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void timepulse_init(void);
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void switch_gclk_main_to_timepulse(void);
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#endif /* TIMEPULSE_H */
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@ -32,12 +32,14 @@
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#include "system/system.h"
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#include "sercom/usart.h"
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#include "system/port.h"
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#include "system/events.h"
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#include "system/extint.h"
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#include "tc/tc_driver.h"
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#include "gps.h"
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#include "mfsk.h"
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#include "ubx_messages.h"
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#include "system/wdt.h"
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#include "timepulse.h"
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#include "xosc.h"
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#include "telemetry.h"
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#include "contestia.h"
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#include "rsid.h"
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@ -49,21 +51,16 @@
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#define CALLSIGN "UBSEDSx"
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/* Set the modulation mode */
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//#define RTTY
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#define CONTESTIA
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/**
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* Initialises the status LED
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*/
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static inline void led_init(void)
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{
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port_pin_set_config(LED0_PIN,
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PORT_PIN_DIR_OUTPUT, /* Direction */
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PORT_PIN_DIR_INPUT, /* Direction */
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PORT_PIN_PULL_NONE, /* Pull */
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false); /* Powersave */
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port_pin_set_output_level(LED0_PIN, 1); /* LED is active low */
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// port_pin_set_output_level(LED0_PIN, 1); /* LED is active low */
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}
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/**
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* Turns the status LED on
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@ -287,6 +284,8 @@ int main(void)
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/* Restart the GCLK Module */
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system_gclk_init();
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system_events_init();
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system_extint_init();
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/* Get the current CPU Clock */
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SystemCoreClock = system_cpu_clock_get_hz();
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@ -298,8 +297,6 @@ int main(void)
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/* Configure the Power Manager */
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//powermananger_init();
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/**
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* System initialisation
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* ---------------------------------------------------------------------------
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@ -315,6 +312,20 @@ int main(void)
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/* Initialise Si4060 interface */
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si_trx_init();
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xosc_init();
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measure_xosc(XOSC_MEASURE_TIMEPULSE);
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while (1) {
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system_sleep();
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}
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led_on();
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while (1) {
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@ -294,23 +294,6 @@ void telemetry_tick(void) {
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* =============================================================================
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*/
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void si_gclk_setup(void)
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{
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system_pinmux_pin_set_config(SI406X_TCXO_PINMUX >> 16, /* GPIO Pin */
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SI406X_TCXO_PINMUX & 0xFFFF, /* Mux Position */
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SYSTEM_PINMUX_PIN_DIR_INPUT, /* Direction */
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SYSTEM_PINMUX_PIN_PULL_NONE, /* Pull */
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false); /* Powersave */
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system_gclk_gen_set_config(SI406X_TCXO_GCLK,
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GCLK_SOURCE_GCLKIN, /* Source */
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false, /* High When Disabled */
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1, /* Division Factor */
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false, /* Run in standby */
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false); /* Output Pin Enable */
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system_gclk_gen_enable(SI406X_TCXO_GCLK);
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}
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/**
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* Initialises a timer interupt at the given frequency
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*
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@ -318,10 +301,7 @@ void si_gclk_setup(void)
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*/
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float timer0_tick_init(float frequency)
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{
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//si_gclk_setup();
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/* Calculate the wrap value for the given frequency */
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//float gclk_frequency = SI406X_TCXO_FREQUENCY;
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float gclk_frequency = (float)system_gclk_chan_get_hz(0);
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uint32_t count = (uint32_t)(gclk_frequency / frequency);
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@ -1,208 +0,0 @@
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/*
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* Functions for turning the GPS timepulse into a HF Clock
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* Copyright (C) 2014 Richard Meadows <richardeoin>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
|
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* distribute, sublicense, and/or sell copies of the Software, and to
|
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "samd20.h"
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#include "system/clock.h"
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#include "system/gclk.h"
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#include "system/pinmux.h"
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#include "tc/tc_driver.h"
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#include "hw_config.h"
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/* void timepulse_init(void) */
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/* { */
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/* /\* Set up the DFLL GCLK channel *\/ */
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/* system_gclk_chan_set_config(SYSCTRL_GCLK_ID_DFLL48, DFLL48M_GCLK); */
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/* system_gclk_chan_enable(SYSCTRL_GCLK_ID_DFLL48); */
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/* /\* Configure DFLL48 *\/ */
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/* system_clock_source_dfll_set_config( */
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/* SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED, /\* Loop Mode *\/ */
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/* false, /\* On demand *\/ */
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/* SYSTEM_CLOCK_DFLL_QUICK_LOCK_DISABLE, /\* Quick Lock *\/ */
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/* SYSTEM_CLOCK_DFLL_CHILL_CYCLE_ENABLE, /\* Chill Cycle *\/ */
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/* SYSTEM_CLOCK_DFLL_WAKEUP_LOCK_KEEP, /\* Lock during wakeup *\/ */
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/* SYSTEM_CLOCK_DFLL_STABLE_TRACKING_TRACK_AFTER_LOCK, */
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/* 0x1f / 4, /\* Open Loop - Coarse calibration value *\/ */
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/* 0xff / 4, /\* Open Loop - Fine calibration value *\/ */
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/* 1, /\* Closed Loop - Coarse Maximum step *\/ */
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/* 1, /\* Closed Loop - Fine Maximum step *\/ */
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/* DFLL48_MUL); /\* Frequency Multiplication Factor *\/ */
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/* /\* Enable DFLL48 *\/ */
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/* system_clock_source_enable(SYSTEM_CLOCK_SOURCE_DFLL); */
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/* /\* Wait for it to be ready *\/ */
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/* while(!system_clock_source_is_ready(SYSTEM_CLOCK_SOURCE_DFLL)); */
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/* /\* system_clock_source_xosc_set_config(SYSTEM_CLOCK_EXTERNAL_CLOCK, *\/ */
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/* /\* SYSTEM_XOSC_STARTUP_16384, *\/ */
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/* /\* true, /\\* Auto gain control *\\/ *\/ */
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/* /\* 16000000UL, /\\* Frequency *\\/ *\/ */
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/* /\* true, /\\* Run in Standby *\\/ *\/ */
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/* /\* false); /\\* Run on demand *\\/ *\/ */
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/* /\* system_clock_source_enable(SYSTEM_CLOCK_SOURCE_XOSC); *\/ */
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/* /\* Configure the HF GCLK *\/ */
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/* system_gclk_gen_set_config(SI406X_HF_GCLK, */
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/* GCLK_SOURCE_DFLL48M, /\* Source *\/ */
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/* false, /\* High When Disabled *\/ */
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/* 3, /\* Division Factor = 16MHz*\/ */
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/* false, /\* Run in standby *\/ */
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/* true); /\* Output Pin Enable *\/ */
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/* /\* Configure the output pin *\/ */
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/* system_pinmux_pin_set_config(SI406X_HF_CLK_PINMUX >> 16, /\* GPIO Pin *\/ */
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/* SI406X_HF_CLK_PINMUX & 0xFFFF, /\* Mux Position *\/ */
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/* SYSTEM_PINMUX_PIN_DIR_INPUT, /\* Direction *\/ */
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/* SYSTEM_PINMUX_PIN_PULL_NONE, /\* Pull *\/ */
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/* false); /\* Powersave *\/ */
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/* /\* Enable the HF GCLK *\/ */
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/* system_gclk_gen_enable(SI406X_HF_GCLK); */
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/* } */
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/* /\** */
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/* * Switches GCLK_MAIN (a.k.a. GCLK0) to the gps timepulse */
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/* *\/ */
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/* void switch_gclk_main_to_timepulse(void) */
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/* { */
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/* /\* Enable GCLK_IO[0] *\/ */
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/* system_pinmux_pin_set_config(GPS_TIME_PINMUX >> 16, /\* GPIO Pin *\/ */
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/* GPS_TIME_PINMUX & 0xFFFF, /\* Mux Position *\/ */
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/* SYSTEM_PINMUX_PIN_DIR_INPUT, /\* Direction *\/ */
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/* SYSTEM_PINMUX_PIN_PULL_NONE, /\* Pull *\/ */
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/* false); /\* Powersave *\/ */
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/* /\* Switch GCLK_MAIN to GCLK_IO[0] *\/ */
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/* system_gclk_gen_set_config(GCLK_GENERATOR_0, /\* GCLK 0 *\/ */
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/* GCLK_SOURCE_GCLKIN,/\* Source from pin *\/ */
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/* false, /\* High When Disabled *\/ */
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/* 1, /\* Division Factor *\/ */
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/* true, /\* Run in standby *\/ */
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/* true); /\* Output Pin Enable *\/ */
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/* /\* Wait for switch? *\/ */
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/* } */
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/* /\** */
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/* * Outputs GCLK0 div 2 on the HF CLK pin */
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/* *\/ */
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/* void half_glck_main_on_hf_clk(void) */
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/* { */
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/* bool capture_channel_enables[] = {true, true}; */
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/* uint32_t compare_channel_values[] = {0x0000, 0x0000}; */
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/* tc_init(TC2, */
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/* GCLK_GENERATOR_0, */
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/* TC_COUNTER_SIZE_8BIT, */
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/* TC_CLOCK_PRESCALER_DIV1, */
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/* TC_WAVE_GENERATION_NORMAL_FREQ, */
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/* TC_RELOAD_ACTION_GCLK, */
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/* TC_COUNT_DIRECTION_UP, */
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/* TC_WAVEFORM_INVERT_OUTPUT_NONE, */
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/* false, /\* Oneshot = false *\/ */
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/* false, /\* Run in standby = false *\/ */
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/* 0x0000, /\* Initial value *\/ */
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/* 0x0000, /\* Top value *\/ */
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/* capture_channel_enables, /\* Capture Channel Enables *\/ */
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/* compare_channel_values); /\* Compare Channels Values *\/ */
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/* /\* Enable the output pin *\/ */
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/* system_pinmux_pin_set_config(PINMUX_PA17F_TC2_WO1 >> 16, /\* GPIO Pin *\/ */
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/* PINMUX_PA17F_TC2_WO1 & 0xFFFF, /\* Mux Position *\/ */
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/* SYSTEM_PINMUX_PIN_DIR_INPUT, /\* Direction *\/ */
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/* SYSTEM_PINMUX_PIN_PULL_NONE, /\* Pull *\/ */
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/* false); /\* Powersave *\/ */
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/* tc_enable(TC2); */
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/* tc_start_counter(TC2); */
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/* } */
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/* /\** */
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/* * Returns the current GCLK_MAIN frequency, as measured against OSC8M */
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/* *\/ */
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/* uint32_t gclk_main_frequency(void) */
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/* { */
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/* uint32_t osc8m_frequency = 8000000UL >> SYSCTRL->OSC8M.bit.PRESC; */
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/* /\* Configure GCLK Gen 6 as reference *\/ */
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/* system_gclk_gen_set_config(GCLK_GENERATOR_6, */
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/* GCLK_SOURCE_OSC8M, /\* Source *\/ */
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/* false, /\* High When Disabled *\/ */
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/* 4, /\* Division Factor *\/ */
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/* false, /\* Run in standby *\/ */
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/* false); /\* Output Pin Enable *\/ */
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/* /\* Enable GCLK 6 *\/ */
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/* system_gclk_gen_enable(GCLK_GENERATOR_6); */
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/* /\* Timer 0 free runs on GLCK 0 *\/ */
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/* bool t0_capture_channel_enables[] = {false, false}; */
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/* uint32_t t0_compare_channel_values[] = {0x0000, 0x0000}; */
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/* tc_init(TC0, */
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/* GCLK_GENERATOR_0, */
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/* TC_COUNTER_SIZE_32BIT, */
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/* TC_CLOCK_PRESCALER_DIV1, */
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/* TC_WAVE_GENERATION_NORMAL_FREQ, */
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/* TC_RELOAD_ACTION_GCLK, */
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/* TC_COUNT_DIRECTION_UP, */
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/* TC_WAVEFORM_INVERT_OUTPUT_NONE, */
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/* false, /\* Oneshot *\/ */
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/* false, /\* Run in standby *\/ */
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/* 0x0000, /\* Initial value *\/ */
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/* 0xFFFFFFFF, /\* Top value *\/ */
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/* t0_capture_channel_enables, /\* Capture Channel Enables *\/ */
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/* t0_compare_channel_values); /\* Compare Channels Values *\/ */
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/* /\* Timer 3 counts 10000 cycles of GLCK 6 *\/ */
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/* bool t1_capture_channel_enables[] = {false, false}; */
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/* uint32_t t1_compare_channel_values[] = {10000, 0x0000}; */
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/* tc_init(TC3, */
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/* GCLK_GENERATOR_6, */
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/* TC_COUNTER_SIZE_16BIT, */
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/* TC_CLOCK_PRESCALER_DIV1, */
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/* TC_WAVE_GENERATION_NORMAL_FREQ, */
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/* TC_RELOAD_ACTION_GCLK, */
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/* TC_COUNT_DIRECTION_UP, */
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/* TC_WAVEFORM_INVERT_OUTPUT_NONE, */
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/* false, /\* Oneshot *\/ */
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/* false, /\* Run in standby *\/ */
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/* 0x0000, /\* Initial value *\/ */
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/* 0xFFFF, /\* Top value *\/ */
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/* t1_capture_channel_enables, /\* Capture Channel Enables *\/ */
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/* t1_compare_channel_values); /\* Compare Channels Values *\/ */
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/* tc_enable(TC0); */
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/* tc_enable(TC3); */
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/* tc_start_counter(TC0); */
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/* tc_start_counter(TC3); */
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/* /\* Wait 10000 cycles of GCLK 6 *\/ */
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/* while (!(tc_get_status(TC3) & TC_STATUS_CHANNEL_0_MATCH)); */
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|
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/* uint32_t gclk_main_count = tc_get_count_value(TC0) - 50; */
|
||||
|
||||
/* return gclk_main_count / 10; */
|
||||
/* } */
|
||||
Ładowanie…
Reference in New Issue