tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1#include "mips.h"
2#include "atj213x.h"
3
4static void backlight_set(int level)
5{
6 /* set duty cycle in 1/32 units */
7 PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK) | PMU_CHG_PDUT(level));
8}
9
10static void wdt_feed(void)
11{
12 RTC_WDCTL |= RTC_WDCTL_CLR;
13}
14
15void set_sw_interrupt0(void)
16{
17 unsigned int val;
18 asm volatile("mfc0 %0,$13" : "=r" (val));
19 val |= 0x100;
20 asm volatile("mtc0 %0,$13" : "+r" (val));
21}
22
23int main(void)
24{
25 /* backlight clock enable, select backlight clock as 32kHz */
26 CMU_FMCLK = (CMU_FMCLK & ~(CMU_FMCLK_BCLK_MASK)) | CMU_FMCLK_BCKE | CMU_FMCLK_BCLK_32K;
27
28 /* baclight enable */
29 PMU_CTL |= PMU_CTL_BL_EN;
30
31 /* pwm output, phase high, some initial duty cycle set as 24/32 */
32 PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK)| PMU_CHG_PBLS_PWM | PMU_CHG_PPHS_HIGH | PMU_CHG_PDUT(24));
33
34 /* ADEC_N63.BIN seems to setup P_CLK as 7.5MHz which is timer clk */
35 RTC_T0 = (7500000*10/32); /* with this we should see transition every ~0.3125s and 'black' every ~10s */
36 RTC_T0CTL = (1<<5) | (1<<2) | (1<<1) | (1<<0); /* timer enable, timer reload, timer irq, clear irq pending bit */
37
38 /* Configure T0 interrupt as IP6. IP6 is unmasked in crt0.S */
39 INTC_CFG0 = 0;
40 INTC_CFG1 = 0;
41 INTC_CFG2 = (1<<10);
42
43 /* unmask T0 source in INTC */
44 INTC_MSK |= (1<<10);
45
46 while(1)
47 {
48 /* otherwise wdt will trigger reset */
49 wdt_feed();
50 }
51
52 return 0;
53}
54
55/* Timer T0 interrupt service routine */
56INT_T0()
57{
58 static int j = 0;
59
60 /* clear pending bit in timer module */
61 RTC_T0CTL |= 1;
62
63 /* change backligh */
64 backlight_set(++j);
65}