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mirror of https://github.com/trezor/trezor-firmware.git synced 2024-11-12 18:49:07 +00:00

timer: Use Cortex-M3 SysTick timers

Removed `usbDelay(uint32_t cycles)`, added `usbSleep(uint32_t millis)`

The same method signature could cause silent code breakage at runtime,
as opposed to noisy code breakage at compile time which is the better
kind.
This commit is contained in:
Saleem Rashid 2016-11-17 19:07:41 +00:00 committed by Pavol Rusnak
parent 3cede26fbc
commit 25b9bfd97b
8 changed files with 104 additions and 8 deletions

View File

@ -6,6 +6,7 @@ OBJS += serialno.o
OBJS += setup.o
OBJS += util.o
OBJS += memory.o
OBJS += timer.o
OBJS += gen/bitmaps.o
OBJS += gen/fonts.o

View File

@ -58,7 +58,7 @@ bool protectButton(ButtonRequestType type, bool confirm_only)
// button acked - check buttons
if (acked) {
usbDelay(3300);
usbSleep(5);
buttonUpdate();
if (button.YesUp) {
result = true;
@ -165,7 +165,7 @@ bool protectPin(bool use_cached)
}
layoutDialog(&bmp_icon_info, NULL, NULL, NULL, "Wrong PIN entered", NULL, "Please wait", secstr, "to continue ...", NULL);
// wait one second
usbDelay(800000);
usbSleep(1000);
if (msg_tiny_id == MessageType_MessageType_Initialize) {
protectAbortedByInitialize = true;
msg_tiny_id = 0xFFFF;

View File

@ -338,7 +338,7 @@ void storage_setHomescreen(const uint8_t *data, uint32_t size)
void get_root_node_callback(uint32_t iter, uint32_t total)
{
usbDelay(10); // handle up to ten usb interrupts.
usbSleep(1);
layoutProgress("Waking up", 1000 * iter / total);
}

View File

@ -27,6 +27,7 @@
#include "layout.h"
#include "layout2.h"
#include "rng.h"
#include "timer.h"
#include "buttons.h"
uint32_t __stack_chk_guard;
@ -58,13 +59,13 @@ void check_lock_screen(void)
// wait until NoButton is released
usbTiny(1);
do {
usbDelay(3300);
usbSleep(5);
buttonUpdate();
} while (!button.NoUp);
// wait for confirmation/cancellation of the dialog
do {
usbDelay(3300);
usbSleep(5);
buttonUpdate();
} while (!button.YesUp && !button.NoUp);
usbTiny(0);
@ -102,6 +103,9 @@ int main(void)
#else
setupApp();
#endif
timer_init();
#if DEBUG_LINK
oledSetDebug(1);
storage_reset(); // wipe storage if debug link

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@ -27,6 +27,7 @@
#include "u2f.h"
#include "storage.h"
#include "util.h"
#include "timer.h"
#define USB_INTERFACE_INDEX_MAIN 0
#if DEBUG_LINK
@ -426,9 +427,10 @@ char usbTiny(char set)
return old;
}
void usbDelay(int cycles)
void usbSleep(uint32_t millis)
{
while (cycles--) {
uint32_t end = system_millis + millis;
while (end > system_millis) {
usbd_poll(usbd_dev);
}
}

View File

@ -24,6 +24,6 @@ void usbInit(void);
void usbPoll(void);
void usbReconnect(void);
char usbTiny(char set);
void usbDelay(int cycles);
void usbSleep(uint32_t millis);
#endif

61
timer.c Normal file
View File

@ -0,0 +1,61 @@
/*
* This file is part of the TREZOR project.
*
* Copyright (C) 2016 Saleem Rashid <trezor@saleemrashid.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "timer.h"
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/cm3/systick.h>
/* 1 tick = 1 ms */
volatile uint32_t system_millis;
/*
* Initialise the Cortex-M3 SysTick timer
*/
void timer_init(void) {
system_millis = 0;
/*
* MCU clock (120 MHz) as source
*
* (120 MHz / 8) = 15 clock pulses
*
*/
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
STK_CVR = 0;
/*
* 1 tick = 1 ms @ 120 MHz
*
* (15 clock pulses * 1000 ms) = 15000 clock pulses
*
* Send an interrupt every (N - 1) clock pulses
*/
systick_set_reload(14999);
/* SysTick as interrupt */
systick_interrupt_enable();
systick_counter_enable();
}
void sys_tick_handler(void) {
system_millis++;
}

28
timer.h Normal file
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@ -0,0 +1,28 @@
/*
* This file is part of the TREZOR project.
*
* Copyright (C) 2016 Saleem Rashid <trezor@saleemrashid.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
/* 1 tick = 1 ms */
extern volatile uint32_t system_millis;
void timer_init(void);
void sys_tick_handler(void);