main.c 23.4 KB
Newer Older
1
#include <stdio.h>
Damien's avatar
Damien committed
2
3
#include <stm32f4xx.h>
#include <stm32f4xx_rcc.h>
4
#include <stm32f4xx_gpio.h>
5
#include <stm32f4xx_tim.h>
6
#include <stm_misc.h>
Damien's avatar
Damien committed
7
8
#include "std.h"

9
#include "misc.h"
Damien's avatar
Damien committed
10
11
#include "mpyconfig.h"
#include "gc.h"
12
#include "systick.h"
13
#include "led.h"
14
#include "lcd.h"
15
#include "storage.h"
16
#include "mma.h"
Damien's avatar
Damien committed
17
#include "usb.h"
18
#include "ff.h"
Damien's avatar
Damien committed
19

20
21
static FATFS fatfs0;

Damien's avatar
Damien committed
22
23
extern uint32_t _heap_start;

24
25
26
27
28
29
30
31
32
33
34
35
void flash_error(int n) {
    for (int i = 0; i < n; i++) {
        led_state(PYB_LED_R1, 1);
        led_state(PYB_LED_R2, 0);
        sys_tick_delay_ms(250);
        led_state(PYB_LED_R1, 0);
        led_state(PYB_LED_R2, 1);
        sys_tick_delay_ms(250);
    }
    led_state(PYB_LED_R2, 0);
}

36
static void impl02_c_version(void) {
Damien's avatar
Damien committed
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
    int x = 0;
    while (x < 400) {
        int y = 0;
        while (y < 400) {
            volatile int z = 0;
            while (z < 400) {
                z = z + 1;
            }
            y = y + 1;
        }
        x = x + 1;
    }
}

#define PYB_USRSW_PORT (GPIOA)
52
#define PYB_USRSW_PIN (GPIO_Pin_13)
Damien's avatar
Damien committed
53

54
void sw_init(void) {
Damien's avatar
Damien committed
55
    // make it an input with pull-up
56
57
58
59
60
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = PYB_USRSW_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(PYB_USRSW_PORT, &GPIO_InitStructure);
Damien's avatar
Damien committed
61
62
}

63
int sw_get(void) {
64
    if (PYB_USRSW_PORT->IDR & PYB_USRSW_PIN) {
Damien's avatar
Damien committed
65
66
67
68
69
70
71
72
73
74
75
76
        // pulled high, so switch is not pressed
        return 0;
    } else {
        // pulled low, so switch is pressed
        return 1;
    }
}

void __fatal_error(const char *msg) {
    lcd_print_strn("\nFATAL ERROR:\n", 14);
    lcd_print_strn(msg, strlen(msg));
    for (;;) {
77
        flash_error(1);
Damien's avatar
Damien committed
78
79
80
    }
}

81
#include "nlr.h"
Damien's avatar
Damien committed
82
83
#include "misc.h"
#include "lexer.h"
84
#include "lexerstm.h"
Damien's avatar
Damien committed
85
86
87
88
#include "mpyconfig.h"
#include "parse.h"
#include "compile.h"
#include "runtime.h"
89
90
#include "repl.h"

91
92
93
static qstr pyb_config_source_dir = 0;
static qstr pyb_config_main = 0;

94
py_obj_t pyb_source_dir(py_obj_t source_dir) {
95
    pyb_config_source_dir = py_get_qstr(source_dir);
96
97
98
99
    return py_const_none;
}

py_obj_t pyb_main(py_obj_t main) {
100
101
102
103
104
    pyb_config_main = py_get_qstr(main);
    return py_const_none;
}

// sync all file systems
105
py_obj_t pyb_sync(void) {
106
    storage_flush();
107
108
    return py_const_none;
}
Damien's avatar
Damien committed
109
110

py_obj_t pyb_delay(py_obj_t count) {
111
    sys_tick_delay_ms(py_get_int(count));
Damien's avatar
Damien committed
112
113
114
115
    return py_const_none;
}

py_obj_t pyb_led(py_obj_t state) {
116
    led_state(PYB_LED_G1, rt_is_true(state));
Damien's avatar
Damien committed
117
118
119
    return state;
}

120
py_obj_t pyb_sw(void) {
Damien's avatar
Damien committed
121
122
123
124
125
126
127
    if (sw_get()) {
        return py_const_true;
    } else {
        return py_const_false;
    }
}

128
/*
129
130
131
132
133
134
void g(uint i) {
    printf("g:%d\n", i);
    if (i & 1) {
        nlr_jump((void*)(42 + i));
    }
}
135
void f(void) {
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
    nlr_buf_t nlr;
    int i;
    for (i = 0; i < 4; i++) {
        printf("f:loop:%d:%p\n", i, &nlr);
        if (nlr_push(&nlr) == 0) {
            // normal
            //printf("a:%p:%p %p %p %u\n", &nlr, nlr.ip, nlr.sp, nlr.prev, nlr.ret_val);
            g(i);
            printf("f:lp:%d:nrm\n", i);
            nlr_pop();
        } else {
            // nlr
            //printf("b:%p:%p %p %p %u\n", &nlr, nlr.ip, nlr.sp, nlr.prev, nlr.ret_val);
            printf("f:lp:%d:nlr:%d\n", i, (int)nlr.ret_val);
        }
    }
}
153
void nlr_test(void) {
154
155
    f(1);
}
156
157
*/

158
void fatality(void) {
159
160
161
162
163
164
    led_state(PYB_LED_R1, 1);
    led_state(PYB_LED_G1, 1);
    led_state(PYB_LED_R2, 1);
    led_state(PYB_LED_G2, 1);
}

165
static const char fresh_boot_py[] =
166
167
168
169
170
171
172
173
174
175
176
177
"# boot.py -- run on boot-up\n"
"# can run arbitrary Python, but best to keep it minimal\n"
"\n"
"pyb.source_dir('/src')\n"
"pyb.main('main.py')\n"
"#pyb.usb_usr('VCP')\n"
"#pyb.usb_msd(True, 'dual partition')\n"
"#pyb.flush_cache(False)\n"
"#pyb.error_log('error.txt')\n"
;

// get lots of info about the board
178
static py_obj_t pyb_info(void) {
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
    // get and print clock speeds
    // SYSCLK=168MHz, HCLK=168MHz, PCLK1=42MHz, PCLK2=84MHz
    {
        RCC_ClocksTypeDef rcc_clocks;
        RCC_GetClocksFreq(&rcc_clocks);
        printf("S=%lu\nH=%lu\nP1=%lu\nP2=%lu\n", rcc_clocks.SYSCLK_Frequency, rcc_clocks.HCLK_Frequency, rcc_clocks.PCLK1_Frequency, rcc_clocks.PCLK2_Frequency);
    }

    // to print info about memory
    {
        extern void *_sidata;
        extern void *_sdata;
        extern void *_edata;
        extern void *_sbss;
        extern void *_ebss;
        extern void *_estack;
        extern void *_etext;
        printf("_sidata=%p\n", &_sidata);
        printf("_sdata=%p\n", &_sdata);
        printf("_edata=%p\n", &_edata);
        printf("_sbss=%p\n", &_sbss);
        printf("_ebss=%p\n", &_ebss);
        printf("_estack=%p\n", &_estack);
        printf("_etext=%p\n", &_etext);
        printf("_heap_start=%p\n", &_heap_start);
    }

206
207
208
209
210
211
212
213
214
215
    // GC info
    {
        gc_info_t info;
        gc_info(&info);
        printf("GC:\n");
        printf("  %lu total\n", info.total);
        printf("  %lu : %lu\n", info.used, info.free);
        printf("  1=%lu 2=%lu m=%lu\n", info.num_1block, info.num_2block, info.max_block);
    }

216
217
218
219
220
    // free space on flash
    {
        DWORD nclst;
        FATFS *fatfs;
        f_getfree("0:", &nclst, &fatfs);
221
        printf("LFS free: %u bytes\n", (uint)(nclst * fatfs->csize * 512));
222
    }
223
224

    return py_const_none;
225
226
}

227
int readline(vstr_t *line, const char *prompt) {
228
    usb_vcp_send_str(prompt);
229
    int len = vstr_len(line);
230
    for (;;) {
231
232
233
        while (usb_vcp_rx_any() == 0) {
            sys_tick_delay_ms(10);
        }
234
        char c = usb_vcp_rx_get();
235
236
        if (c == 4 && vstr_len(line) == len) {
            return 0;
237
238
        } else if (c == '\r') {
            usb_vcp_send_str("\r\n");
239
            return 1;
240
        } else if (c == 127) {
241
242
            if (vstr_len(line) > len) {
                vstr_cut_tail(line, 1);
243
244
245
                usb_vcp_send_str("\b \b");
            }
        } else if (32 <= c && c <= 126) {
246
            vstr_add_char(line, c);
247
248
            usb_vcp_send_strn(&c, 1);
        }
249
250
        sys_tick_delay_ms(100);
    }
251
252
}

253
void do_repl(void) {
254
255
256
257
258
    usb_vcp_send_str("Micro Python 0.5; STM32F405RG; PYBv2\r\n");
    usb_vcp_send_str("Type \"help\" for more information.\r\n");

    vstr_t line;
    vstr_init(&line);
259
260

    for (;;) {
261
262
263
        vstr_reset(&line);
        int ret = readline(&line, ">>> ");
        if (ret == 0) {
264
            // EOF
265
266
267
268
269
            break;
        }

        if (vstr_len(&line) == 0) {
            continue;
270
        }
271
272

        if (py_repl_is_compound_stmt(vstr_str(&line))) {
273
            for (;;) {
274
275
276
277
278
                vstr_add_char(&line, '\n');
                int len = vstr_len(&line);
                int ret = readline(&line, "... ");
                if (ret == 0 || vstr_len(&line) == len) {
                    // done entering compound statement
279
280
281
282
283
284
                    break;
                }
            }
        }

        py_lexer_str_buf_t sb;
285
        py_lexer_t *lex = py_lexer_new_from_str_len("<stdin>", vstr_str(&line), vstr_len(&line), false, &sb);
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
        py_parse_node_t pn = py_parse(lex, PY_PARSE_SINGLE_INPUT);
        py_lexer_free(lex);

        if (pn != PY_PARSE_NODE_NULL) {
            bool comp_ok = py_compile(pn, true);
            if (comp_ok) {
                py_obj_t module_fun = rt_make_function_from_id(1);
                if (module_fun != py_const_none) {
                    nlr_buf_t nlr;
                    if (nlr_push(&nlr) == 0) {
                        rt_call_function_0(module_fun);
                        nlr_pop();
                    } else {
                        // uncaught exception
                        py_obj_print((py_obj_t)nlr.ret_val);
                        printf("\n");
                    }
                }
            }
        }
    }
307

308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
    usb_vcp_send_str("\r\n");
}

bool do_file(const char *filename) {
    py_lexer_file_buf_t fb;
    py_lexer_t *lex = py_lexer_new_from_file(filename, &fb);

    if (lex == NULL) {
        printf("could not open file '%s' for reading\n", filename);
        return false;
    }

    py_parse_node_t pn = py_parse(lex, PY_PARSE_FILE_INPUT);
    py_lexer_free(lex);

    if (pn == PY_PARSE_NODE_NULL) {
        return false;
    }

    bool comp_ok = py_compile(pn, false);
    if (!comp_ok) {
        return false;
    }

    py_obj_t module_fun = rt_make_function_from_id(1);
    if (module_fun == py_const_none) {
        return false;
    }

    nlr_buf_t nlr;
    if (nlr_push(&nlr) == 0) {
        rt_call_function_0(module_fun);
        nlr_pop();
        return true;
    } else {
        // uncaught exception
        py_obj_print((py_obj_t)nlr.ret_val);
        printf("\n");
        return false;
    }
348
349
}

350
351
352
353
354
355
#define RAM_START (0x20000000) // fixed for chip
#define HEAP_END  (0x2001c000) // tunable
#define RAM_END   (0x20020000) // fixed for chip

void gc_helper_get_regs_and_clean_stack(machine_uint_t *regs, machine_uint_t heap_end);

356
void gc_collect(void) {
357
    uint32_t start = sys_tick_counter;
Damien's avatar
Damien committed
358
    gc_collect_start();
359
360
361
362
    gc_collect_root((void**)RAM_START, (((uint32_t)&_heap_start) - RAM_START) / 4);
    machine_uint_t regs[10];
    gc_helper_get_regs_and_clean_stack(regs, HEAP_END);
    gc_collect_root((void**)HEAP_END, (RAM_END - HEAP_END) / 4); // will trace regs since they now live in this function on the stack
Damien's avatar
Damien committed
363
    gc_collect_end();
364
365
366
367
368
369
370
371
372
    uint32_t ticks = sys_tick_counter - start; // TODO implement a function that does this properly
    gc_info_t info;
    gc_info(&info);
    printf("GC@%lu %lums\n", start, ticks);
    printf(" %lu total\n", info.total);
    printf(" %lu : %lu\n", info.used, info.free);
    printf(" 1=%lu 2=%lu m=%lu\n", info.num_1block, info.num_2block, info.max_block);
}

373
py_obj_t pyb_gc(void) {
374
375
    gc_collect();
    return py_const_none;
Damien's avatar
Damien committed
376
377
}

378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
// PWM
// TIM2 and TIM5 have CH1, CH2, CH3, CH4 on PA0-PA3 respectively
// they are both 32-bit counters
// 16-bit prescaler
// TIM2_CH3 also on PB10 (used below)
void servo_init(void) {
    // TIM2 clock enable
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    // GPIOC Configuration: TIM2_CH3 (PB10)
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    // Connect TIM2 pins to AF1
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_TIM2);

    // Compute the prescaler value so TIM2 runs at 100kHz
    uint16_t PrescalerValue = (uint16_t) ((SystemCoreClock / 2) / 100000) - 1;

    // Time base configuration
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period = 2000; // timer cycles at 50Hz
    TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    // PWM1 Mode configuration: Channel1
    TIM_OCInitTypeDef TIM_OCInitStructure;
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 150; // units of 10us
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC3Init(TIM2, &TIM_OCInitStructure);

    // ?
    TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);

    // ?
    TIM_ARRPreloadConfig(TIM2, ENABLE);

    // TIM2 enable counter
    TIM_Cmd(TIM2, ENABLE);
}

py_obj_t pyb_servo_set(py_obj_t value) {
    int v = py_get_int(value);
    if (v < 100) { v = 100; }
    if (v > 200) { v = 200; }
    TIM2->CCR3 = v;
    return py_const_none;
}

Damien's avatar
Damien committed
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
#define MMA_ADDR (0x4c)

py_obj_t pyb_mma_read() {
    mma_start(MMA_ADDR, 1);
    mma_send_byte(0);
    mma_restart(MMA_ADDR, 0);
    py_obj_t data[4];
    for (int i = 3; i >= 1; i--) {
        int v = mma_read_ack() & 0x3f;
        if (v & 0x20) {
            v |= ~0x1f;
        }
        data[i] = py_obj_new_int(v);
    }
    data[0] = py_obj_new_int(mma_read_nack());
    return rt_build_tuple(4, data); // items in reverse order in data
}

454
int main(void) {
455
    // TODO disable JTAG
Damien's avatar
Damien committed
456

457
458
459
460
461
462
    // set interrupt priority config to use all 4 bits for pre-empting
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

    // enable the CCM RAM and the GPIO's
    RCC->AHB1ENR |= RCC_AHB1ENR_CCMDATARAMEN | RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | RCC_AHB1ENR_GPIOCEN;

463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
    // configure SDIO pins to be high to start with (doesn't seem to fix problem...)
    {
      GPIO_InitTypeDef GPIO_InitStructure;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
      GPIO_Init(GPIOC, &GPIO_InitStructure);

      // Configure PD.02 CMD line
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
      GPIO_Init(GPIOD, &GPIO_InitStructure);
    }

478
479
    // basic sub-system init
    sys_tick_init();
Damien's avatar
Damien committed
480
    led_init();
481
482
483
484
485

    // turn on LED to indicate bootup
    led_state(PYB_LED_G1, 1);

    // more sub-system init
Damien's avatar
Damien committed
486
    sw_init();
487
    storage_init();
Damien's avatar
Damien committed
488

489
490
491
492
493
soft_reset:

    // LCD init
    lcd_init();

Damien's avatar
Damien committed
494
    // GC init
495
    gc_init(&_heap_start, (void*)HEAP_END);
Damien's avatar
Damien committed
496

497
    // Micro Python init
498
499
    qstr_init();
    rt_init();
500

501
502
503
    // servo
    servo_init();

504
    // add some functions to the python namespace
505
506
507
508
509
    {
        py_obj_t m = py_module_new();
        rt_store_attr(m, qstr_from_str_static("info"), rt_make_function_0(pyb_info));
        rt_store_attr(m, qstr_from_str_static("source_dir"), rt_make_function_1(pyb_source_dir));
        rt_store_attr(m, qstr_from_str_static("main"), rt_make_function_1(pyb_main));
510
        rt_store_attr(m, qstr_from_str_static("sync"), rt_make_function_0(pyb_sync));
511
512
513
514
        rt_store_attr(m, qstr_from_str_static("gc"), rt_make_function_0(pyb_gc));
        rt_store_attr(m, qstr_from_str_static("delay"), rt_make_function_1(pyb_delay));
        rt_store_attr(m, qstr_from_str_static("led"), rt_make_function_1(pyb_led));
        rt_store_attr(m, qstr_from_str_static("sw"), rt_make_function_0(pyb_sw));
515
        rt_store_attr(m, qstr_from_str_static("servo"), rt_make_function_1(pyb_servo_set));
Damien's avatar
Damien committed
516
        rt_store_attr(m, qstr_from_str_static("mma"), rt_make_function_0(pyb_mma_read));
517
518
        rt_store_name(qstr_from_str_static("pyb"), m);
    }
519

520
521
    // print a message to the LCD
    lcd_print_str(" micro py board\n");
Damien's avatar
Damien committed
522

523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
    // local filesystem init
    {
        // try to mount the flash
        FRESULT res = f_mount(&fatfs0, "0:", 1);
        if (res == FR_OK) {
            // mount sucessful
        } else if (res == FR_NO_FILESYSTEM) {
            // no filesystem, so create a fresh one

            // LED on to indicate creation of LFS
            led_state(PYB_LED_R2, 1);
            uint32_t stc = sys_tick_counter;

            res = f_mkfs("0:", 0, 0);
            if (res == FR_OK) {
                // success creating fresh LFS
            } else {
                __fatal_error("could not create LFS");
            }

543
544
            // keep LED on for at least 200ms
            sys_tick_wait_at_least(stc, 200);
545
546
547
548
            led_state(PYB_LED_R2, 0);
        } else {
            __fatal_error("could not access LFS");
        }
Damien's avatar
Damien committed
549
550
    }

551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
    // make sure we have a /boot.py
    {
        FILINFO fno;
        FRESULT res = f_stat("0:/boot.py", &fno);
        if (res == FR_OK) {
            if (fno.fattrib & AM_DIR) {
                // exists as a directory
                // TODO handle this case
                // see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
            } else {
                // exists as a file, good!
            }
        } else {
            // doesn't exist, create fresh file

            // LED on to indicate creation of boot.py
            led_state(PYB_LED_R2, 1);
            uint32_t stc = sys_tick_counter;

            FIL fp;
            f_open(&fp, "0:/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
            UINT n;
573
            f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n);
574
575
576
            // TODO check we could write n bytes
            f_close(&fp);

577
578
            // keep LED on for at least 200ms
            sys_tick_wait_at_least(stc, 200);
579
580
581
582
            led_state(PYB_LED_R2, 0);
        }
    }

583
584
585
586
587
    // run /boot.py
    if (!do_file("0:/boot.py")) {
        flash_error(4);
    }

588
589
590
    // USB
    usb_init();

Damien's avatar
Damien committed
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
    // MMA
    {
        // init and reset address to zero
        mma_init();
        mma_start(MMA_ADDR, 1);
        mma_send_byte(0);
        mma_stop();

        /*
        // read and print all 11 registers
        mma_start(MMA_ADDR, 1);
        mma_send_byte(0);
        mma_restart(MMA_ADDR, 0);
        for (int i = 0; i <= 0xa; i++) {
            int data;
            if (i == 0xa) {
                data = mma_read_nack();
            } else {
                data = mma_read_ack();
            }
            printf(" %02x", data);
        }
        printf("\n");
        */

        // put into active mode
        mma_start(MMA_ADDR, 1);
        mma_send_byte(7); // mode
        mma_send_byte(1); // active mode
        mma_stop();

        /*
        // infinite loop to read values
        for (;;) {
            sys_tick_delay_ms(500);

            mma_start(MMA_ADDR, 1);
            mma_send_byte(0);
            mma_restart(MMA_ADDR, 0);
            for (int i = 0; i <= 3; i++) {
                int data;
                if (i == 3) {
                    data = mma_read_nack();
                    printf(" %02x\n", data);
                } else {
                    data = mma_read_ack() & 0x3f;
                    if (data & 0x20) {
                        data |= ~0x1f;
                    }
                    printf(" % 2d", data);
                }
            }
        }
        */
    }

647
648
    // turn boot-up LED off
    led_state(PYB_LED_G1, 0);
649

650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
    // run main script
    {
        vstr_t *vstr = vstr_new();
        vstr_add_str(vstr, "0:/");
        if (pyb_config_source_dir == 0) {
            vstr_add_str(vstr, "src");
        } else {
            vstr_add_str(vstr, qstr_str(pyb_config_source_dir));
        }
        vstr_add_char(vstr, '/');
        if (pyb_config_main == 0) {
            vstr_add_str(vstr, "main.py");
        } else {
            vstr_add_str(vstr, qstr_str(pyb_config_main));
        }
        if (!do_file(vstr_str(vstr))) {
            flash_error(3);
667
        }
668
        vstr_free(vstr);
669
670
    }

Damien's avatar
Damien committed
671
    //printf("init;al=%u\n", m_get_total_bytes_allocated()); // 1600, due to qstr_init
672
    //sys_tick_delay_ms(1000);
Damien's avatar
Damien committed
673
674

    // Python!
675
    if (0) {
Damien's avatar
Damien committed
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
        //const char *pysrc = "def f():\n  x=x+1\nprint(42)\n";
        const char *pysrc =
            // impl01.py
            /*
            "x = 0\n"
            "while x < 400:\n"
            "    y = 0\n"
            "    while y < 400:\n"
            "        z = 0\n"
            "        while z < 400:\n"
            "            z = z + 1\n"
            "        y = y + 1\n"
            "    x = x + 1\n";
            */
            // impl02.py
691
            /*
Damien's avatar
Damien committed
692
693
694
695
696
697
698
699
700
701
702
703
            "#@micropython.native\n"
            "def f():\n"
            "    x = 0\n"
            "    while x < 400:\n"
            "        y = 0\n"
            "        while y < 400:\n"
            "            z = 0\n"
            "            while z < 400:\n"
            "                z = z + 1\n"
            "            y = y + 1\n"
            "        x = x + 1\n"
            "f()\n";
704
            */
705
            /*
Damien's avatar
Damien committed
706
707
708
709
710
711
712
            "print('in python!')\n"
            "x = 0\n"
            "while x < 4:\n"
            "    pyb_led(True)\n"
            "    pyb_delay(201)\n"
            "    pyb_led(False)\n"
            "    pyb_delay(201)\n"
713
            "    x += 1\n"
Damien's avatar
Damien committed
714
715
716
            "print('press me!')\n"
            "while True:\n"
            "    pyb_led(pyb_sw())\n";
717
            */
Damien's avatar
Damien committed
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
            /*
            // impl16.py
            "@micropython.asm_thumb\n"
            "def delay(r0):\n"
            "    b(loop_entry)\n"
            "    label(loop1)\n"
            "    movw(r1, 55999)\n"
            "    label(loop2)\n"
            "    subs(r1, r1, 1)\n"
            "    cmp(r1, 0)\n"
            "    bgt(loop2)\n"
            "    subs(r0, r0, 1)\n"
            "    label(loop_entry)\n"
            "    cmp(r0, 0)\n"
            "    bgt(loop1)\n"
            "print('in python!')\n"
            "@micropython.native\n"
            "def flash(n):\n"
            "    x = 0\n"
            "    while x < n:\n"
            "        pyb_led(True)\n"
            "        delay(249)\n"
            "        pyb_led(False)\n"
            "        delay(249)\n"
            "        x = x + 1\n"
            "flash(20)\n";
            */
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
            // impl18.py
            /*
            "# basic exceptions\n"
            "x = 1\n"
            "try:\n"
            "    x.a()\n"
            "except:\n"
            "    print(x)\n";
            */
            // impl19.py
            "# for loop\n"
            "def f():\n"
            "    for x in range(400):\n"
            "        for y in range(400):\n"
            "            for z in range(400):\n"
            "                pass\n"
            "f()\n";
Damien's avatar
Damien committed
762

763
764
        py_lexer_str_buf_t py_lexer_str_buf;
        py_lexer_t *lex = py_lexer_new_from_str_len("<stdin>", pysrc, strlen(pysrc), false, &py_lexer_str_buf);
Damien's avatar
Damien committed
765

766
767
768
769
770
771
        // nalloc=1740;6340;6836 -> 140;4600;496 bytes for lexer, parser, compiler
        printf("lex; al=%u\n", m_get_total_bytes_allocated());
        sys_tick_delay_ms(1000);
        py_parse_node_t pn = py_parse(lex, PY_PARSE_FILE_INPUT);
        py_lexer_free(lex);
        if (pn != PY_PARSE_NODE_NULL) {
Damien's avatar
Damien committed
772
            printf("pars;al=%u\n", m_get_total_bytes_allocated());
773
            sys_tick_delay_ms(1000);
Damien's avatar
Damien committed
774
            //parse_node_show(pn, 0);
775
            bool comp_ok = py_compile(pn, false);
Damien's avatar
Damien committed
776
            printf("comp;al=%u\n", m_get_total_bytes_allocated());
777
            sys_tick_delay_ms(1000);
Damien's avatar
Damien committed
778

779
780
781
            if (!comp_ok) {
                printf("compile error\n");
            } else {
Damien's avatar
Damien committed
782
783
784
785
                // execute it!

                py_obj_t module_fun = rt_make_function_from_id(1);

786
                // flash once
787
                led_state(PYB_LED_G1, 1);
788
                sys_tick_delay_ms(100);
789
                led_state(PYB_LED_G1, 0);
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805

                nlr_buf_t nlr;
                if (nlr_push(&nlr) == 0) {
                    py_obj_t ret = rt_call_function_0(module_fun);
                    printf("done! got: ");
                    py_obj_print(ret);
                    printf("\n");
                    nlr_pop();
                } else {
                    // uncaught exception
                    printf("exception: ");
                    py_obj_print((py_obj_t)nlr.ret_val);
                    printf("\n");
                }

                // flash once
806
                led_state(PYB_LED_G1, 1);
807
                sys_tick_delay_ms(100);
808
                led_state(PYB_LED_G1, 0);
Damien's avatar
Damien committed
809

810
                sys_tick_delay_ms(1000);
Damien's avatar
Damien committed
811
                printf("nalloc=%u\n", m_get_total_bytes_allocated());
812
                sys_tick_delay_ms(1000);
Damien's avatar
Damien committed
813
814
815
816
            }
        }
    }

817
818
    do_repl();

Damien's avatar
Damien committed
819
820
    // benchmark C version of impl02.py
    if (0) {
821
        led_state(PYB_LED_G1, 1);
822
        sys_tick_delay_ms(100);
823
        led_state(PYB_LED_G1, 0);
Damien's avatar
Damien committed
824
        impl02_c_version();
825
        led_state(PYB_LED_G1, 1);
826
        sys_tick_delay_ms(100);
827
        led_state(PYB_LED_G1, 0);
Damien's avatar
Damien committed
828
829
830
    }

    // SD card testing
831
832
833
    if (1) {
        extern void sdio_init(void);
        sdio_init();
Damien's avatar
Damien committed
834
835
    }

836
837
838
839
    printf("PYB: sync filesystems\n");
    pyb_sync();

    printf("PYB: soft reboot\n");
840
    goto soft_reset;
Damien's avatar
Damien committed
841
}