113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2014 by Marcin Bukat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "stddef.h"
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#include "target.h"
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#include "system.h"
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#include "logf.h"
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#include "atj213x.h"
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#define CORE_FREQ 7500000
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#define HZ 1000000
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static void backlight_init(void)
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{
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/* backlight clock enable, select backlight clock as 32kHz */
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CMU_FMCLK = (CMU_FMCLK & ~(CMU_FMCLK_BCLK_MASK)) | CMU_FMCLK_BCKE | CMU_FMCLK_BCLK_32K;
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/* baclight enable */
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PMU_CTL |= PMU_CTL_BL_EN;
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/* pwm output, phase high, some initial duty cycle set as 24/32 */
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PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK)| PMU_CHG_PBLS_PWM | PMU_CHG_PPHS_HIGH | PMU_CHG_PDUT(24));
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}
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void backlight_set(int level)
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{
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/* set duty cycle in 1/32 units */
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PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK) | PMU_CHG_PDUT(level));
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}
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void target_udelay(int us)
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{
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unsigned int i = us * (CORE_FREQ / 2000000);
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asm volatile (
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".set noreorder \n"
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"1: \n"
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"bnez %0, 1b \n"
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"addiu %0, %0, -1 \n"
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".set reorder \n"
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: "=r" (i)
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: "0" (i)
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);
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}
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void target_mdelay(int ms)
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{
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return target_udelay(ms * 1000);
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}
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void blink(int cnt)
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{
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int i;
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for (i=0; i<cnt; i++)
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{
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backlight_set(0);
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target_mdelay(300);
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backlight_set(24);
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target_mdelay(300);
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}
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}
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void target_init(void)
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{
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RTC_WDCTL = (RTC_WDCTL & ~(1<<4))|(1<<6)|1; /* disable WDT */
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/* Configure USB interrupt as IP6. IP6 is unmasked in crt0.S */
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INTC_CFG0 = 0;
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INTC_CFG1 = 0;
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INTC_CFG2 = (1<<4);
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/* mask all interrupts to avoid pending irq servicing */
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INTC_MSK = 0;
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backlight_init();
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}
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struct hwstub_target_desc_t __attribute__((aligned(2))) target_descriptor =
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{
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sizeof(struct hwstub_target_desc_t),
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HWSTUB_DT_TARGET,
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HWSTUB_TARGET_ATJ,
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"ATJ213X"
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};
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void target_get_desc(int desc, void **buffer)
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{
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(void) desc;
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*buffer = NULL;
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}
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void target_get_config_desc(void *buffer, int *size)
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{
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(void) buffer;
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(void) size;
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}
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