circuitpython/stmhal/pyexec.c

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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stm32f4xx_hal.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "misc.h"
#include "lexer.h"
#include "parse.h"
#include "obj.h"
#include "parsehelper.h"
#include "compile.h"
#include "runtime.h"
#include "repl.h"
#include "gc.h"
#include "gccollect.h"
#include "systick.h"
#include "pyexec.h"
#include "storage.h"
#include "usb.h"
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#include "usart.h"
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pyexec_mode_kind_t pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
STATIC bool repl_display_debugging_info = 0;
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void stdout_tx_str(const char *str) {
if (pyb_usart_global_debug != PYB_USART_NONE) {
usart_tx_str(pyb_usart_global_debug, str);
}
#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
lcd_print_str(str);
#endif
usb_vcp_send_str(str);
}
void stdout_tx_strn(const char *str, uint len) {
if (pyb_usart_global_debug != PYB_USART_NONE) {
usart_tx_strn(pyb_usart_global_debug, str, len);
}
#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
lcd_print_strn(str, len);
#endif
usb_vcp_send_strn(str, len);
}
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int stdin_rx_chr(void) {
for (;;) {
#if 0
#ifdef USE_HOST_MODE
pyb_usb_host_process();
int c = pyb_usb_host_get_keyboard();
if (c != 0) {
return c;
}
#endif
#endif
if (usb_vcp_rx_num() != 0) {
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return usb_vcp_rx_get();
} else if (pyb_usart_global_debug != PYB_USART_NONE && usart_rx_any(pyb_usart_global_debug)) {
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return usart_rx_char(pyb_usart_global_debug);
}
HAL_Delay(1);
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if (storage_needs_flush()) {
storage_flush();
}
}
}
char *str_dup(const char *str) {
uint32_t len = strlen(str);
char *s2 = m_new(char, len + 1);
memcpy(s2, str, len);
s2[len] = 0;
return s2;
}
#define READLINE_HIST_SIZE (8)
static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
int readline(vstr_t *line, const char *prompt) {
stdout_tx_str(prompt);
int orig_line_len = line->len;
int escape_seq = 0;
int hist_cur = -1;
int cursor_pos = orig_line_len;
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for (;;) {
int c = stdin_rx_chr();
int last_line_len = line->len;
int redraw_step_back = 0;
bool redraw_from_cursor = false;
int redraw_step_forward = 0;
if (escape_seq == 0) {
if (VCP_CHAR_CTRL_A <= c && c <= VCP_CHAR_CTRL_D && vstr_len(line) == orig_line_len) {
// control character with empty line
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return c;
} else if (c == '\r') {
// newline
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stdout_tx_str("\r\n");
if (line->len > orig_line_len && (readline_hist[0] == NULL || strcmp(readline_hist[0], line->buf + orig_line_len) != 0)) {
// a line which is not empty and different from the last one
// so update the history
for (int i = READLINE_HIST_SIZE - 1; i > 0; i--) {
readline_hist[i] = readline_hist[i - 1];
}
readline_hist[0] = str_dup(line->buf + orig_line_len);
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}
return 0;
} else if (c == 27) {
// escape sequence
escape_seq = 1;
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} else if (c == 127) {
// backspace
if (cursor_pos > orig_line_len) {
vstr_cut_out_bytes(line, cursor_pos - 1, 1);
// set redraw parameters
redraw_step_back = 1;
redraw_from_cursor = true;
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}
} else if (32 <= c && c <= 126) {
// printable character
vstr_ins_char(line, cursor_pos, c);
// set redraw parameters
redraw_from_cursor = true;
redraw_step_forward = 1;
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}
} else if (escape_seq == 1) {
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if (c == '[') {
escape_seq = 2;
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} else {
escape_seq = 0;
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}
} else if (escape_seq == 2) {
escape_seq = 0;
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if (c == 'A') {
// up arrow
if (hist_cur + 1 < READLINE_HIST_SIZE && readline_hist[hist_cur + 1] != NULL) {
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// increase hist num
hist_cur += 1;
// set line to history
line->len = orig_line_len;
vstr_add_str(line, readline_hist[hist_cur]);
// set redraw parameters
redraw_step_back = cursor_pos - orig_line_len;
redraw_from_cursor = true;
redraw_step_forward = line->len - orig_line_len;
}
} else if (c == 'B') {
// down arrow
if (hist_cur >= 0) {
// decrease hist num
hist_cur -= 1;
// set line to history
vstr_cut_tail_bytes(line, line->len - orig_line_len);
if (hist_cur >= 0) {
vstr_add_str(line, readline_hist[hist_cur]);
}
// set redraw parameters
redraw_step_back = cursor_pos - orig_line_len;
redraw_from_cursor = true;
redraw_step_forward = line->len - orig_line_len;
}
} else if (c == 'C') {
// right arrow
if (cursor_pos < line->len) {
redraw_step_forward = 1;
}
} else if (c == 'D') {
// left arrow
if (cursor_pos > orig_line_len) {
redraw_step_back = 1;
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}
}
} else {
escape_seq = 0;
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}
// redraw command prompt, efficiently
if (redraw_step_back > 0) {
for (int i = 0; i < redraw_step_back; i++) {
stdout_tx_str("\b");
}
cursor_pos -= redraw_step_back;
}
if (redraw_from_cursor) {
if (line->len < last_line_len) {
// erase old chars
for (int i = cursor_pos; i < last_line_len; i++) {
stdout_tx_str(" ");
}
// step back
for (int i = cursor_pos; i < last_line_len; i++) {
stdout_tx_str("\b");
}
}
// draw new chars
stdout_tx_strn(line->buf + cursor_pos, line->len - cursor_pos);
// move cursor forward if needed (already moved forward by length of line, so move it back)
for (int i = cursor_pos + redraw_step_forward; i < line->len; i++) {
stdout_tx_str("\b");
}
cursor_pos += redraw_step_forward;
} else if (redraw_step_forward > 0) {
// draw over old chars to move cursor forwards
stdout_tx_strn(line->buf + cursor_pos, redraw_step_forward);
cursor_pos += redraw_step_forward;
}
HAL_Delay(1);
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}
}
// parses, compiles and executes the code in the lexer
// frees the lexer before returning
bool parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
mp_parse_error_kind_t parse_error_kind;
mp_parse_node_t pn = mp_parse(lex, input_kind, &parse_error_kind);
qstr source_name = mp_lexer_source_name(lex);
if (pn == MP_PARSE_NODE_NULL) {
// parse error
mp_parse_show_exception(lex, parse_error_kind);
mp_lexer_free(lex);
return false;
}
mp_lexer_free(lex);
mp_obj_t module_fun = mp_compile(pn, source_name, is_repl);
mp_parse_node_free(pn);
if (module_fun == mp_const_none) {
return false;
}
nlr_buf_t nlr;
bool ret;
uint32_t start = HAL_GetTick();
if (nlr_push(&nlr) == 0) {
usb_vcp_set_interrupt_char(VCP_CHAR_CTRL_C); // allow ctrl-C to interrupt us
rt_call_function_0(module_fun);
usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
nlr_pop();
ret = true;
} else {
// uncaught exception
// FIXME it could be that an interrupt happens just before we disable it here
usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
mp_obj_print_exception((mp_obj_t)nlr.ret_val);
ret = false;
}
// display debugging info if wanted
if (is_repl && repl_display_debugging_info) {
uint32_t ticks = HAL_GetTick() - start; // TODO implement a function that does this properly
printf("took %lu ms\n", ticks);
gc_collect();
// qstr info
{
uint n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
printf("qstr:\n n_pool=%u\n n_qstr=%u\n n_str_data_bytes=%u\n n_total_bytes=%u\n", n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
}
// 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);
}
}
return ret;
}
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int pyexec_raw_repl(void) {
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vstr_t line;
vstr_init(&line, 32);
raw_repl_reset:
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stdout_tx_str("raw REPL; CTRL-B to exit\r\n");
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for (;;) {
vstr_reset(&line);
stdout_tx_str(">");
for (;;) {
char c = stdin_rx_chr();
if (c == VCP_CHAR_CTRL_A) {
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// reset raw REPL
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goto raw_repl_reset;
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} else if (c == VCP_CHAR_CTRL_B) {
// change to friendly REPL
stdout_tx_str("\r\n");
vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
return 0;
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} else if (c == VCP_CHAR_CTRL_C) {
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// clear line
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vstr_reset(&line);
} else if (c == VCP_CHAR_CTRL_D) {
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// input finished
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break;
} else if (c == '\r') {
vstr_add_char(&line, '\n');
} else if (32 <= c && c <= 126) {
vstr_add_char(&line, c);
}
}
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// indicate reception of command
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stdout_tx_str("OK");
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if (line.len == 0) {
// exit for a soft reset
stdout_tx_str("\r\n");
vstr_clear(&line);
return 1;
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}
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line.buf, line.len, 0);
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parse_compile_execute(lex, MP_PARSE_FILE_INPUT, false);
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// indicate end of output with EOF character
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stdout_tx_str("\004");
}
}
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int pyexec_friendly_repl(void) {
vstr_t line;
vstr_init(&line, 32);
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#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
// in host mode, we enable the LCD for the repl
mp_obj_t lcd_o = rt_call_function_0(rt_load_name(qstr_from_str("LCD")));
rt_call_function_1(rt_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
#endif
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friendly_repl_reset:
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stdout_tx_str("Micro Python build <git hash> on 25/1/2014; " MICROPY_HW_BOARD_NAME " with STM32F405RG\r\n");
stdout_tx_str("Type \"help()\" for more information.\r\n");
// to test ctrl-C
/*
{
uint32_t x[4] = {0x424242, 0xdeaddead, 0x242424, 0xdeadbeef};
for (;;) {
nlr_buf_t nlr;
printf("pyexec_repl: %p\n", x);
usb_vcp_set_interrupt_char(VCP_CHAR_CTRL_C);
if (nlr_push(&nlr) == 0) {
for (;;) {
}
} else {
printf("break\n");
}
}
}
*/
for (;;) {
vstr_reset(&line);
int ret = readline(&line, ">>> ");
if (ret == VCP_CHAR_CTRL_A) {
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// change to raw REPL
stdout_tx_str("\r\n");
vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
return 0;
} else if (ret == VCP_CHAR_CTRL_B) {
// reset friendly REPL
stdout_tx_str("\r\n");
goto friendly_repl_reset;
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} else if (ret == VCP_CHAR_CTRL_C) {
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// break
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stdout_tx_str("\r\n");
continue;
} else if (ret == VCP_CHAR_CTRL_D) {
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// exit for a soft reset
stdout_tx_str("\r\n");
vstr_clear(&line);
return 1;
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} else if (vstr_len(&line) == 0) {
continue;
}
if (mp_repl_is_compound_stmt(vstr_str(&line))) {
for (;;) {
vstr_add_char(&line, '\n');
int len = vstr_len(&line);
int ret = readline(&line, "... ");
if (ret == VCP_CHAR_CTRL_D || vstr_len(&line) == len) {
// done entering compound statement
break;
}
}
}
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, true);
}
}
bool pyexec_file(const char *filename) {
mp_lexer_t *lex = mp_lexer_new_from_file(filename);
if (lex == NULL) {
printf("could not open file '%s' for reading\n", filename);
return false;
}
return parse_compile_execute(lex, MP_PARSE_FILE_INPUT, false);
}
mp_obj_t pyb_set_repl_info(mp_obj_t o_value) {
repl_display_debugging_info = mp_obj_get_int(o_value);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(pyb_set_repl_info_obj, pyb_set_repl_info);