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stmhal: Factor out stdio and readline to separate files.

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Adds readline_init() to clear readline history on soft reset.  Addresses
issue #387.
This commit is contained in:
Damien George 2014-03-29 14:20:05 +00:00
parent c689c19471
commit c9fd6645b0
9 changed files with 228 additions and 194 deletions
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2
stmhal/Makefile
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@ -71,6 +71,8 @@ SRC_C = \
math.c \
malloc0.c \
gccollect.c \
pybstdio.c \
readline.c \
pyexec.c \
help.c \
input.c \

3
stmhal/input.c
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@ -3,10 +3,9 @@
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "readline.h"
#include "usb.h"
extern int readline(vstr_t *line, const char *prompt);
STATIC mp_obj_t mp_builtin_input(uint n_args, const mp_obj_t *args) {
if (n_args == 1) {
mp_obj_print(args[0], PRINT_REPR);

4
stmhal/main.c
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@ -16,10 +16,10 @@
#include "obj.h"
#include "parsehelper.h"
#include "compile.h"
#include "runtime0.h"
#include "runtime.h"
#include "gc.h"
#include "gccollect.h"
#include "readline.h"
#include "pyexec.h"
#include "usart.h"
#include "led.h"
@ -210,6 +210,8 @@ soft_reset:
def_path[2] = MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_lib);
sys_path = mp_obj_new_list(3, def_path);
readline_init();
exti_init();
#if MICROPY_HW_HAS_SWITCH

3
stmhal/modpyb.c
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@ -11,6 +11,7 @@
#include "gc.h"
#include "gccollect.h"
#include "systick.h"
#include "pybstdio.h"
#include "pyexec.h"
#include "led.h"
#include "gpio.h"
@ -202,8 +203,6 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_hid_send_report_obj, pyb_hid_send_report);
MP_DEFINE_CONST_FUN_OBJ_2(pyb_I2C_obj, pyb_I2C); // TODO put this in i2c.c
#endif
extern int stdin_rx_chr(void);
STATIC mp_obj_t pyb_input(void ) {
return mp_obj_new_int(stdin_rx_chr());
}

54
stmhal/pybstdio.c Normal file
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@ -0,0 +1,54 @@
#include <stm32f4xx_hal.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "misc.h"
#include "obj.h"
#include "pybstdio.h"
#include "storage.h"
#include "usb.h"
#include "usart.h"
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);
}
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) {
return usb_vcp_rx_get();
} else if (pyb_usart_global_debug != PYB_USART_NONE && usart_rx_any(pyb_usart_global_debug)) {
return usart_rx_char(pyb_usart_global_debug);
}
HAL_Delay(1);
if (storage_needs_flush()) {
storage_flush();
}
}
}

3
stmhal/pybstdio.h Normal file
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@ -0,0 +1,3 @@
void stdout_tx_str(const char *str);
void stdout_tx_strn(const char *str, uint len);
int stdin_rx_chr(void);

191
stmhal/pyexec.c
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@ -1,5 +1,4 @@
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stm32f4xx_hal.h>
@ -19,201 +18,15 @@
#include "gc.h"
#include "gccollect.h"
#include "systick.h"
#include "pybstdio.h"
#include "readline.h"
#include "pyexec.h"
#include "storage.h"
#include "usb.h"
#include "usart.h"
pyexec_mode_kind_t pyexec_mode_kind = PYEXEC_MODE_FRIENDLY_REPL;
STATIC bool repl_display_debugging_info = 0;
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);
}
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) {
return usb_vcp_rx_get();
} else if (pyb_usart_global_debug != PYB_USART_NONE && usart_rx_any(pyb_usart_global_debug)) {
return usart_rx_char(pyb_usart_global_debug);
}
HAL_Delay(1);
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;
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
return c;
} else if (c == '\r') {
// newline
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);
}
return 0;
} else if (c == 27) {
// escape sequence
escape_seq = 1;
} 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;
}
} 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;
}
} else if (escape_seq == 1) {
if (c == '[') {
escape_seq = 2;
} else {
escape_seq = 0;
}
} else if (escape_seq == 2) {
escape_seq = 0;
if (c == 'A') {
// up arrow
if (hist_cur + 1 < READLINE_HIST_SIZE && readline_hist[hist_cur + 1] != NULL) {
// 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;
}
}
} else {
escape_seq = 0;
}
// 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);
}
}
// 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) {

160
stmhal/readline.c Normal file
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@ -0,0 +1,160 @@
#include <string.h>
#include <stm32f4xx_hal.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "misc.h"
#include "obj.h"
#include "pybstdio.h"
#include "readline.h"
#include "usb.h"
#define READLINE_HIST_SIZE (8)
static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
void readline_init(void) {
memset(readline_hist, 0, READLINE_HIST_SIZE * sizeof(const char*));
}
STATIC 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;
}
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;
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
return c;
} else if (c == '\r') {
// newline
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);
}
return 0;
} else if (c == 27) {
// escape sequence
escape_seq = 1;
} 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;
}
} 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;
}
} else if (escape_seq == 1) {
if (c == '[') {
escape_seq = 2;
} else {
escape_seq = 0;
}
} else if (escape_seq == 2) {
escape_seq = 0;
if (c == 'A') {
// up arrow
if (hist_cur + 1 < READLINE_HIST_SIZE && readline_hist[hist_cur + 1] != NULL) {
// 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;
}
}
} else {
escape_seq = 0;
}
// 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);
}
}

2
stmhal/readline.h Normal file
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@ -0,0 +1,2 @@
void readline_init(void);
int readline(vstr_t *line, const char *prompt);