boochow

#define IOREG(X)  (*(volatile uint32_t *) (X))

#define IRQ_PEND1         IOREG(0x2000B204)

#define SYST_CS  IOREG(0x20003000)
#define SYST_C0  IOREG(0x2000300C)
#define SYST_C1  IOREG(0x20003010)
#define SYST_C2  IOREG(0x20003014)
#define SYST_C3  IOREG(0x20003018)

boochow

// ldr pc, [pc, #24]                                                            
#define JMP_PC_24   0xe59ff018

typedef void (*exception_hander_t)(void);

typedef struct __attribute__((aligned(32))) _vector_table_t {
    const unsigned int vector[8]; // all elements shoud be JMP_PC_24            
    exception_hander_t reset;
    exception_hander_t undef;
    exception_hander_t svc;

boochow

#include "py/runtime.h"
#include "py/mphal.h"
#include "py/obj.h"

// キーワード型引数を持つ関数
// pos_argsはpositional args、kw_argsはkeyword args
STATIC mp_obj_t gpu_fb_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
    return mp_const_none;
}
// 関数から関数オブジェクトを生成。第二引数の「2」はpositional argsの個数（必須の引数の個数）

boochow

typedef volatile struct                                          \
__attribute__((aligned(16))) _fb_info_t {
    uint32_t display_w;  //write display width
    uint32_t display_h;  //write display height
    uint32_t w;          //write framebuffer width
    uint32_t h;          //write framebuffer height
    uint32_t row_bytes;  //write 0 to get value
    uint32_t bpp;        //write bits per pixel
    uint32_t ofs_x;      //write x offset of framebuffer
    uint32_t ofs_y;      //write y offset of framebuffer

boochow

#define IOREG(X)  (*(volatile uint32_t *) (X))
#define MAILBOX0_FIFO   IOREG(0x2000B880)
#define MAILBOX0_POLL   IOREG(0x2000B890)
#define MAILBOX0_SENDER IOREG(0x2000B894)
#define MAILBOX0_STATUS IOREG(0x2000B898)
#define MAILBOX0_CONFIG IOREG(0x2000B89C)
#define MAILBOX1_FIFO   IOREG(0x2000B8A0)
#define MAILBOX1_POLL   IOREG(0x2000B8B0)
#define MAILBOX1_SENDER IOREG(0x2000B8B4)
#define MAILBOX1_STATUS IOREG(0x2000B8B8)

boochow

import math
hid = pyb.USB_HID()
def osc(n, d):
  for i in range(n):
    hid.send((0, int(20 * math.sin(i / 10)), 0, 0))
    pyb.delay(d)

# osc(100, 50)

boochow

  // initialize usb
  UsbInitialise();

  while (1) {
      unsigned int kbd_addr;
      unsigned int keys[6];
      unsigned int key;

      if (kbd_addr == 0) {
          // Is there a keyboard ?

boochow

pi@pi-zero-w:~$ gpio mode 1 pwm
pi@pi-zero-w:~$ gpio pwm-ms
pi@pi-zero-w:~$ gpio pwmc 192
pi@pi-zero-w:~$ gpio pwmr 2000
pi@pi-zero-w:~$ gpio pwm 1 150
pi@pi-zero-w:~$ gpio pwm 1 100
pi@pi-zero-w:~$ gpio pwm 1 200
pi@pi-zero-w:~$

boochow

pi@pi-zero-w:~$ raspi-gpio get
BANK0 (GPIO 0 to 27):
GPIO 0: level=1 fsel=0 func=INPUT
GPIO 1: level=1 fsel=0 func=INPUT
GPIO 2: level=1 fsel=4 alt=0 func=SDA1
GPIO 3: level=1 fsel=4 alt=0 func=SCL1
GPIO 4: level=1 fsel=0 func=INPUT
GPIO 5: level=1 fsel=0 func=INPUT
GPIO 6: level=1 fsel=0 func=INPUT
GPIO 7: level=1 fsel=1 func=OUTPUT

boochow

#!/bin/sh
i2cset -y 1 0x3c 0x00 0xae # display off
i2cset -y 1 0x3c 0x00 0xd5 # clockdiv
i2cset -y 1 0x3c 0x00 0x80
i2cset -y 1 0x3c 0x00 0xa8 # multiplex
i2cset -y 1 0x3c 0x00 0x3f
i2cset -y 1 0x3c 0x00 0xd3 # offset
i2cset -y 1 0x3c 0x00 0x00
i2cset -y 1 0x3c 0x00 0x40 # startline
i2cset -y 1 0x3c 0x00 0x8d # charge pump