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Updated teensy to use common code from stm directory. 

Updated mconfigport.h to enable GC
This commit is contained in:
Dave Hylands 2014-01-07 09:49:42 -08:00
parent 6d6bc9efc1
commit 9b7b947b01
20 changed files with 105 additions and 836 deletions
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3
stm/Makefile
View File

@ -30,7 +30,8 @@ SRC_C = \
string0.c \
malloc0.c \
systick.c \
lexerstm.c \
lexerstr.c \
lexerfatfs.c \
led.c \
lcd.c \
servo.c \

24
stm/lexerstm.c → stm/lexerfatfs.c
View File

@ -5,29 +5,7 @@
#include "misc.h"
#include "lexer.h"
#include "lexerstm.h"
unichar str_buf_next_char(mp_lexer_str_buf_t *sb) {
if (sb->src_cur < sb->src_end) {
return *sb->src_cur++;
} else {
return MP_LEXER_CHAR_EOF;
}
}
void str_buf_free(mp_lexer_str_buf_t *sb) {
if (sb->free) {
m_del(char, (char*)sb->src_beg, 0 /* don't know allocated size of src */);
}
}
mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, bool free_str, mp_lexer_str_buf_t *sb) {
sb->free = free_str;
sb->src_beg = str;
sb->src_cur = str;
sb->src_end = str + len;
return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_char_t)str_buf_next_char, (mp_lexer_stream_close_t)str_buf_free);
}
#include "lexerfatfs.h"
unichar file_buf_next_char(mp_lexer_file_buf_t *fb) {
if (fb->pos >= fb->len) {

8
stm/lexerfatfs.h Normal file
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@ -0,0 +1,8 @@
typedef struct _py_lexer_file_buf_t {
FIL fp;
char buf[20];
uint16_t len;
uint16_t pos;
} mp_lexer_file_buf_t;
mp_lexer_t *mp_lexer_new_from_file(const char *filename, mp_lexer_file_buf_t *fb);

16
stm/lexerstm.h
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@ -1,16 +0,0 @@
typedef struct _py_lexer_str_buf_t {
bool free; // free src_beg when done
const char *src_beg; // beginning of source
const char *src_cur; // current location in source
const char *src_end; // end (exclusive) of source
} mp_lexer_str_buf_t;
typedef struct _py_lexer_file_buf_t {
FIL fp;
char buf[20];
uint16_t len;
uint16_t pos;
} mp_lexer_file_buf_t;
mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, bool free_str, mp_lexer_str_buf_t *sb);
mp_lexer_t *mp_lexer_new_from_file(const char *filename, mp_lexer_file_buf_t *fb);

7
teensy/lexerteensy.c → stm/lexerstr.c
View File

@ -3,7 +3,7 @@
#include "misc.h"
#include "lexer.h"
#include "lexerteensy.h"
#include "lexerstr.h"
unichar str_buf_next_char(mp_lexer_str_buf_t *sb) {
if (sb->src_cur < sb->src_end) {
@ -26,8 +26,3 @@ mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uin
sb->src_end = str + len;
return mp_lexer_new(src_name, sb, (mp_lexer_stream_next_char_t)str_buf_next_char, (mp_lexer_stream_close_t)str_buf_free);
}
mp_lexer_t *mp_import_open_file(qstr mod_name) {
printf("import not implemented\n");
return NULL;
}

0
teensy/lexerteensy.h → stm/lexerstr.h
View File

3
stm/main.c
View File

@ -19,7 +19,8 @@
#include "nlr.h"
#include "misc.h"
#include "lexer.h"
#include "lexerstm.h"
#include "lexerstr.h"
#include "lexerfatfs.h"
#include "parse.h"
#include "obj.h"
#include "compile.h"

23
teensy/Makefile
View File

@ -22,14 +22,19 @@ LIBS = -L $(COMPILER_PATH)/../lib/gcc/arm-none-eabi/4.7.2/thumb2 -lgcc
SRC_C = \
main.c \
lexerteensy.c \
lcd.c \
led.c \
lexerfatfs.c \
usart.c \
usb.c \
STM_SRC_C = \
lexerstr.c \
malloc0.c \
printf.c \
string0.c \
usb.c \
SRC_S = \
STM_SRC_S = \
gchelper.s \
PY_O = \
@ -90,7 +95,10 @@ SRC_TEENSY = \
usb_serial.c \
yield.c \
OBJ = $(addprefix $(BUILD)/, $(SRC_C:.c=.o) $(SRC_S:.s=.o) $(PY_O) $(SRC_TEENSY:.c=.o))
STM_SRC_C_OBJ = $(STM_SRC_C:.c=.o)
STM_SRC_S_OBJ = $(STM_SRC_S:.s=.o)
OBJ = $(addprefix $(BUILD)/, $(SRC_C:.c=.o) $(STM_SRC_C_OBJ) $(STM_SRC_S_OBJ) $(PY_O) $(SRC_TEENSY:.c=.o))
#LIB = -lreadline
# the following is needed for BSD
#LIB += -ltermcap
@ -117,10 +125,13 @@ $(PROG).elf: $(BUILD) $(OBJ)
$(BUILD):
mkdir -p $@
$(BUILD)/%.o: %.s
$(BUILD)/%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
$(BUILD)/%.o: ../stm/%.s
$(AS) -o $@ $<
$(BUILD)/%.o: %.c
$(BUILD)/%.o: ../stm/%.c
$(CC) $(CFLAGS) -c -o $@ $<
$(BUILD)/%.o: $(PYSRC)/%.S

13
teensy/README.md
View File

@ -8,13 +8,6 @@ cd teensy
ARDUINO=~/arduino-1.0.5 make
```
To build the loader
```
cd teensy/loader
make
```
To upload micropython to the Teensy 3.1.
Press the Program button on the Teensy 3.1
@ -23,9 +16,3 @@ make upload
```
Currently, the python prompt is through the USB serial interface.
The LED will blink (100 msec on/100 msec off) while waiting for the USB Serial
device to be configured, and will blink (200 msec on/200 msec off) while
sitting at the readline prompt.
Currently, there is no I/O support configured (no GPIO, ADC, etc).

36
teensy/gchelper.s
View File

@ -1,36 +0,0 @@
.syntax unified
.cpu cortex-m4
.thumb
.text
.align 2
@ void gc_helper_get_regs_and_clean_stack(r0=uint regs[10], r1=heap_end)
.global gc_helper_get_regs_and_clean_stack
.thumb
.thumb_func
.type gc_helper_get_regs_and_clean_stack, %function
gc_helper_get_regs_and_clean_stack:
@ store registers into given array
str r4, [r0], #4
str r5, [r0], #4
str r6, [r0], #4
str r7, [r0], #4
str r8, [r0], #4
str r9, [r0], #4
str r10, [r0], #4
str r11, [r0], #4
str r12, [r0], #4
str r13, [r0], #4
@ clean the stack from given pointer up to current sp
movs r0, #0
mov r2, sp
b.n .entry
.loop:
str r0, [r1], #4
.entry:
cmp r1, r2
bcc.n .loop
bx lr
.size gc_helper_get_regs_and_clean_stack, .-gc_helper_get_regs_and_clean_stack

14
teensy/lcd.c Normal file
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@ -0,0 +1,14 @@
#include "misc.h"
#include "../stm/lcd.h"
void lcd_init(void) {
}
void lcd_print_str(const char *str) {
(void)str;
}
void lcd_print_strn(const char *str, unsigned int len) {
(void)str;
(void)len;
}

20
teensy/led.c
View File

@ -61,21 +61,17 @@ mp_obj_t led_obj_off(mp_obj_t self_in) {
static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_on_obj, led_obj_on);
static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_off_obj, led_obj_off);
static const mp_method_t led_methods[] = {
{ "on", &led_obj_on_obj },
{ "off", &led_obj_off_obj },
{ NULL, NULL },
};
static const mp_obj_type_t led_obj_type = {
{ &mp_const_type },
"Led",
led_obj_print, // print
NULL, // make_new
NULL, // call_n
NULL, // unary_op
NULL, // binary_op
NULL, // getiter
NULL, // iternext
{ // method list
{ "on", &led_obj_on_obj },
{ "off", &led_obj_off_obj },
{ NULL, NULL },
}
.print = led_obj_print,
.methods = led_methods,
};
mp_obj_t pyb_Led(mp_obj_t led_id) {

17
teensy/lexerfatfs.c Normal file
View File

@ -0,0 +1,17 @@
#include <stdint.h>
#include <stdio.h>
#include "misc.h"
#include "lexer.h"
typedef int FIL;
#include "../stm/lexerfatfs.h"
mp_lexer_t *mp_lexer_new_from_file(const char *filename, mp_lexer_file_buf_t *fb) {
printf("import not implemented\n");
return NULL;
}
mp_lexer_t *mp_import_open_file(qstr mod_name) {
printf("import not implemented\n");
return NULL;
}

4
teensy/main.c
View File

@ -8,7 +8,7 @@
#include "mpconfig.h"
#include "mpqstr.h"
#include "lexer.h"
#include "lexerteensy.h"
#include "../stm/lexerstr.h"
#include "parse.h"
#include "obj.h"
#include "compile.h"
@ -378,7 +378,7 @@ void do_repl(void) {
stdout_tx_str("\r\n");
}
void main(void) {
int main(void) {
pinMode(LED_BUILTIN, OUTPUT);
// Wait for host side to get connected
while (!usb_vcp_is_connected()) {

245
teensy/main.cpp
View File

@ -1,245 +0,0 @@
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "Arduino.h"
extern "C"
{
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "lexer.h"
#include "lexerteensy.h"
#include "parse.h"
#include "obj.h"
#include "compile.h"
#include "runtime0.h"
#include "runtime.h"
#include "repl.h"
#include "usb.h"
}
#ifdef USE_READLINE
#include <readline/readline.h>
#include <readline/history.h>
#endif
#if 0
static char *str_join(const char *s1, int sep_char, const char *s2) {
int l1 = strlen(s1);
int l2 = strlen(s2);
char *s = m_new(char, l1 + l2 + 2);
memcpy(s, s1, l1);
if (sep_char != 0) {
s[l1] = sep_char;
l1 += 1;
}
memcpy(s + l1, s2, l2);
s[l1 + l2] = 0;
return s;
}
static char *prompt(char *p) {
#ifdef USE_READLINE
char *line = readline(p);
if (line) {
add_history(line);
}
#else
static char buf[256];
fputs(p, stdout);
char *s = fgets(buf, sizeof(buf), stdin);
if (!s) {
return NULL;
}
int l = strlen(buf);
if (buf[l - 1] == '\n') {
buf[l - 1] = 0;
} else {
l++;
}
char *line = m_new(char, l);
memcpy(line, buf, l);
#endif
return line;
}
#endif
#define READLINE_HIST_SIZE (8)
static const char *readline_hist[READLINE_HIST_SIZE] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
void stdout_tx_str(const char *str) {
// usart_tx_str(str);
usb_vcp_send_str(str);
}
static elapsedMillis ledTime;
static uint8_t ledState;
int readline(vstr_t *line, const char *prompt) {
stdout_tx_str(prompt);
int len = vstr_len(line);
int escape = 0;
int hist_num = 0;
for (;;) {
char c;
ledState = 1;
ledTime = 0;
digitalWrite(LED_BUILTIN, ledState);
for (;;) {
if (ledTime > 200) {
ledState = !ledState;
digitalWrite(LED_BUILTIN, ledState);
ledTime = 0;
}
if (usb_vcp_rx_any() != 0) {
c = usb_vcp_rx_get();
break;
#if 0
} else if (usart_rx_any()) {
c = usart_rx_char();
break;
#endif
}
//delay(1);
//if (storage_needs_flush()) {
// storage_flush();
//}
}
if (escape == 0) {
if (c == 4 && vstr_len(line) == len) {
return 0;
} else if (c == '\r') {
stdout_tx_str("\r\n");
for (int i = READLINE_HIST_SIZE - 1; i > 0; i--) {
readline_hist[i] = readline_hist[i - 1];
}
readline_hist[0] = strdup(vstr_str(line));
return 1;
} else if (c == 27) {
escape = true;
} else if (c == 127) {
if (vstr_len(line) > len) {
vstr_cut_tail(line, 1);
stdout_tx_str("\b \b");
}
} else if (32 <= c && c <= 126) {
vstr_add_char(line, c);
stdout_tx_str(line->buf + line->len - 1);
}
} else if (escape == 1) {
if (c == '[') {
escape = 2;
} else {
escape = 0;
}
} else if (escape == 2) {
escape = 0;
if (c == 'A') {
// up arrow
if (hist_num < READLINE_HIST_SIZE && readline_hist[hist_num] != NULL) {
// erase line
for (int i = line->len - len; i > 0; i--) {
stdout_tx_str("\b \b");
}
// set line to history
line->len = len;
vstr_add_str(line, readline_hist[hist_num]);
// draw line
stdout_tx_str(readline_hist[hist_num]);
// increase hist num
hist_num += 1;
}
}
} else {
escape = 0;
}
delay(10);
}
}
void setup(void) {
pinMode(LED_BUILTIN, OUTPUT);
ledState = 1;
digitalWrite(LED_BUILTIN, ledState);
ledTime = 0;
// Wait for host side to get connected
while (!usb_vcp_is_connected()) {
if (ledTime > 100) {
ledState = !ledState;
digitalWrite(LED_BUILTIN, ledState);
ledTime = 0;
}
}
digitalWrite(LED_BUILTIN, 0);
qstr_init();
rt_init();
stdout_tx_str("Micro Python for Teensy 3.1\r\n");
stdout_tx_str("Type \"help()\" for more information.\r\n");
}
void loop(void) {
vstr_t line;
vstr_init(&line);
vstr_reset(&line);
int ret = readline(&line, ">>> ");
if (ret == 0) {
// EOF
return;
}
if (vstr_len(&line) == 0) {
return;
}
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 == 0 || vstr_len(&line) == len) {
// done entering compound statement
break;
}
}
}
mp_lexer_str_buf_t sb;
mp_lexer_t *lex = mp_lexer_new_from_str_len("<stdin>", vstr_str(&line), vstr_len(&line), false, &sb);
mp_parse_node_t pn = mp_parse(lex, MP_PARSE_SINGLE_INPUT);
mp_lexer_free(lex);
if (pn != MP_PARSE_NODE_NULL) {
mp_obj_t module_fun = mp_compile(pn, true);
if (module_fun != mp_const_none) {
nlr_buf_t nlr;
uint32_t start = micros();
if (nlr_push(&nlr) == 0) {
rt_call_function_0(module_fun);
nlr_pop();
// optional timing
if (0) {
uint32_t ticks = micros() - start; // TODO implement a function that does this properly
printf("(took %lu us)\n", ticks);
}
} else {
// uncaught exception
mp_obj_print((mp_obj_t)nlr.ret_val);
printf("\r\n");
}
}
}
}
// for sqrt
#include <math.h>
machine_float_t machine_sqrt(machine_float_t x) {
return sqrt(x);
}

57
teensy/malloc0.c
View File

@ -1,57 +0,0 @@
#include <stdint.h>
#include "std.h"
#include "mpconfig.h"
#include "gc.h"
#if 0
static uint32_t mem = 0;
void *malloc(size_t n) {
if (mem == 0) {
extern uint32_t _heap_start;
mem = (uint32_t)&_heap_start; // need to use big ram block so we can execute code from it (is it true that we can't execute from CCM?)
}
void *ptr = (void*)mem;
mem = (mem + n + 3) & (~3);
if (mem > 0x20000000 + 0x18000) {
void __fatal_error(const char*);
__fatal_error("out of memory");
}
return ptr;
}
void free(void *ptr) {
}
void *realloc(void *ptr, size_t n) {
return malloc(n);
}
#endif
void *calloc(size_t sz, size_t n) {
char *ptr = malloc(sz * n);
for (int i = 0; i < sz * n; i++) {
ptr[i] = 0;
}
return ptr;
}
void *malloc(size_t n) {
void *m = gc_alloc(n);
return m;
}
void free(void *ptr) {
gc_free(ptr);
}
void *realloc(void *ptr, size_t n) {
return gc_realloc(ptr, n);
}
void __assert_func(void) {
printf("\nASSERT FAIL!");
for (;;) {
}
}

6
teensy/mpconfigport.h
View File

@ -2,11 +2,11 @@
// options to control how Micro Python is built
#define MICROPY_ENABLE_FLOAT (1)
#define MICROPY_EMIT_CPYTHON (0)
#define MICROPY_EMIT_X64 (0)
#define MICROPY_EMIT_THUMB (1)
#define MICROPY_EMIT_INLINE_THUMB (1)
#define MICROPY_ENABLE_GC (1)
#define MICROPY_ENABLE_REPL_HELPERS (1)
#define MICROPY_ENABLE_FLOAT (1)
// type definitions for the specific machine

305
teensy/printf.c
View File

@ -1,305 +0,0 @@
#include <stdint.h>
#include <stdarg.h>
#include "std.h"
#include "misc.h"
//#include "lcd.h"
//#include "usart.h"
#include "usb.h"
#define PF_FLAG_LEFT_ADJUST (0x01)
#define PF_FLAG_SHOW_SIGN (0x02)
#define PF_FLAG_SPACE_SIGN (0x04)
#define PF_FLAG_NO_TRAILZ (0x08)
#define PF_FLAG_ZERO_PAD (0x10)
// tricky; we compute pad string by: pad_chars + (flags & PF_FLAG_ZERO_PAD)
#define PF_PAD_SIZE PF_FLAG_ZERO_PAD
static const char *pad_chars = " 0000000000000000";
typedef struct _pfenv_t {
void *data;
void (*print_strn)(void *, const char *str, unsigned int len);
} pfenv_t;
static void print_str_dummy(void *data, const char *str, unsigned int len) {
}
const pfenv_t pfenv_dummy = {0, print_str_dummy};
static int pfenv_print_strn(const pfenv_t *pfenv, const char *str, unsigned int len, int flags, int width) {
int pad = width - len;
if (pad > 0 && (flags & PF_FLAG_LEFT_ADJUST) == 0) {
while (pad > 0) {
int p = pad;
if (p > PF_PAD_SIZE)
p = PF_PAD_SIZE;
pfenv->print_strn(pfenv->data, pad_chars + (flags & PF_FLAG_ZERO_PAD), p);
pad -= p;
}
}
pfenv->print_strn(pfenv->data, str, len);
while (pad > 0) {
int p = pad;
if (p > PF_PAD_SIZE)
p = PF_PAD_SIZE;
pfenv->print_strn(pfenv->data, pad_chars, p);
pad -= p;
}
return len;
}
// enough room for 32 signed number
#define INT_BUF_SIZE (12)
static int pfenv_print_int(const pfenv_t *pfenv, unsigned int x, int sgn, int base, int base_char, int flags, int width) {
char sign = 0;
if (sgn) {
if ((int)x < 0) {
sign = '-';
x = -x;
} else if (flags & PF_FLAG_SHOW_SIGN) {
sign = '+';
} else if (flags & PF_FLAG_SPACE_SIGN) {
sign = ' ';
}
}
char buf[INT_BUF_SIZE];
char *b = buf + INT_BUF_SIZE;
if (x == 0) {
*(--b) = '0';
} else {
do {
int c = x % base;
x /= base;
if (c >= 10) {
c += base_char - 10;
} else {
c += '0';
}
*(--b) = c;
} while (b > buf && x != 0);
}
if (b > buf && sign != 0) {
*(--b) = sign;
}
return pfenv_print_strn(pfenv, b, buf + INT_BUF_SIZE - b, flags, width);
}
void pfenv_prints(const pfenv_t *pfenv, const char *str) {
pfenv->print_strn(pfenv->data, str, strlen(str));
}
int pfenv_printf(const pfenv_t *pfenv, const char *fmt, va_list args) {
int chrs = 0;
for (;;) {
{
const char *f = fmt;
while (*f != '\0' && *f != '%') {
++f; // XXX UTF8 advance char
}
if (f > fmt) {
pfenv->print_strn(pfenv->data, fmt, f - fmt);
chrs += f - fmt;
fmt = f;
}
}
if (*fmt == '\0') {
break;
}
// move past % character
++fmt;
// parse flags, if they exist
int flags = 0;
while (*fmt != '\0') {
if (*fmt == '-') flags |= PF_FLAG_LEFT_ADJUST;
else if (*fmt == '+') flags |= PF_FLAG_SHOW_SIGN;
else if (*fmt == ' ') flags |= PF_FLAG_SPACE_SIGN;
else if (*fmt == '!') flags |= PF_FLAG_NO_TRAILZ;
else if (*fmt == '0') flags |= PF_FLAG_ZERO_PAD;
else break;
++fmt;
}
// parse width, if it exists
int width = 0;
for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
width = width * 10 + *fmt - '0';
}
// parse precision, if it exists
int prec = -1;
if (*fmt == '.') {
++fmt;
if (*fmt == '*') {
++fmt;
prec = va_arg(args, int);
} else {
prec = 0;
for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
prec = prec * 10 + *fmt - '0';
}
}
if (prec < 0) {
prec = 0;
}
}
// parse long specifiers (current not used)
//bool long_arg = false;
if (*fmt == 'l') {
++fmt;
//long_arg = true;
}
if (*fmt == '\0') {
break;
}
switch (*fmt) {
case 'b':
if (va_arg(args, int)) {
chrs += pfenv_print_strn(pfenv, "true", 4, flags, width);
} else {
chrs += pfenv_print_strn(pfenv, "false", 5, flags, width);
}
break;
case 'c':
{
char str = va_arg(args, int);
chrs += pfenv_print_strn(pfenv, &str, 1, flags, width);
break;
}
case 's':
{
const char *str = va_arg(args, const char*);
if (str) {
if (prec < 0) {
prec = strlen(str);
}
chrs += pfenv_print_strn(pfenv, str, prec, flags, width);
} else {
chrs += pfenv_print_strn(pfenv, "(null)", 6, flags, width);
}
break;
}
case 'u':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 10, 'a', flags, width);
break;
case 'd':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 1, 10, 'a', flags, width);
break;
case 'x':
case 'p': // ?
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'a', flags, width);
break;
case 'X':
case 'P': // ?
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'A', flags, width);
break;
default:
pfenv->print_strn(pfenv->data, fmt, 1);
chrs += 1;
break;
}
++fmt;
}
return chrs;
}
void stdout_print_strn(void *data, const char *str, unsigned int len) {
// send stdout to USART, USB CDC VCP, and LCD if nothing else
#if 0
int any = 0;
if (usart_is_enabled()) {
usart_tx_strn_cooked(str, len);
any = true;
}
#endif
if (usb_vcp_is_enabled()) {
usb_vcp_send_strn_cooked(str, len);
// any = true;
}
#if 0
if (!any) {
lcd_print_strn(str, len);
}
#endif
}
static const pfenv_t pfenv_stdout = {0, stdout_print_strn};
int printf(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = pfenv_printf(&pfenv_stdout, fmt, ap);
va_end(ap);
return ret;
}
int vprintf(const char *fmt, va_list ap) {
return pfenv_printf(&pfenv_stdout, fmt, ap);
}
// need this because gcc optimises printf("%c", c) -> putchar(c), and printf("a") -> putchar('a')
int putchar(int c) {
char chr = c;
stdout_print_strn(0, &chr, 1);
return chr;
}
// need this because gcc optimises printf("string\n") -> puts("string")
int puts(const char *s) {
stdout_print_strn(0, s, strlen(s));
char chr = '\n';
stdout_print_strn(0, &chr, 1);
return 1;
}
typedef struct _strn_pfenv_t {
char *cur;
size_t remain;
} strn_pfenv_t;
void strn_print_strn(void *data, const char *str, unsigned int len) {
strn_pfenv_t *strn_pfenv = data;
if (len > strn_pfenv->remain) {
len = strn_pfenv->remain;
}
memcpy(strn_pfenv->cur, str, len);
strn_pfenv->cur += len;
strn_pfenv->remain -= len;
}
int vsnprintf(char *str, size_t size, const char *fmt, va_list ap) {
strn_pfenv_t strn_pfenv;
strn_pfenv.cur = str;
strn_pfenv.remain = size;
pfenv_t pfenv;
pfenv.data = &strn_pfenv;
pfenv.print_strn = strn_print_strn;
int len = pfenv_printf(&pfenv, fmt, ap);
// add terminating null byte
if (size > 0) {
if (strn_pfenv.remain == 0) {
strn_pfenv.cur[-1] = 0;
} else {
strn_pfenv.cur[0] = 0;
}
}
return len;
}
int snprintf(char *str, size_t size, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = vsnprintf(str, size, fmt, ap);
va_end(ap);
return ret;
}

110
teensy/string0.c
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@ -1,110 +0,0 @@
#include <stdint.h>
#include "std.h"
void *memcpy(void *dest, const void *src, size_t n) {
// TODO align and copy 32 bits at a time
uint8_t *d = dest;
const uint8_t *s = src;
for (; n > 0; n--) {
*d++ = *s++;
}
return dest;
}
void *memmove(void *dest, const void *src, size_t n) {
if (src < dest && dest < src + n) {
// need to copy backwards
uint8_t *d = dest + n - 1;
const uint8_t *s = src + n - 1;
for (; n > 0; n--) {
*d-- = *s--;
}
return dest;
} else {
// can use normal memcpy
return memcpy(dest, src, n);
}
}
void *memset(void *s, int c, size_t n) {
uint8_t *s2 = s;
for (; n > 0; n--) {
*s2++ = c;
}
return s;
}
int strlen(const char *str) {
int len = 0;
for (const char *s = str; *s; s++) {
len += 1;
}
return len;
}
int strcmp(const char *s1, const char *s2) {
while (*s1 && *s2) {
char c1 = *s1++; // XXX UTF8 get char, next char
char c2 = *s2++; // XXX UTF8 get char, next char
if (c1 < c2) return -1;
else if (c1 > c2) return 1;
}
if (*s2) return -1;
else if (*s1) return 1;
else return 0;
}
int strncmp(const char *s1, const char *s2, size_t n) {
while (*s1 && *s2 && n > 0) {
char c1 = *s1++; // XXX UTF8 get char, next char
char c2 = *s2++; // XXX UTF8 get char, next char
n--;
if (c1 < c2) return -1;
else if (c1 > c2) return 1;
}
if (n == 0) return 0;
else if (*s2) return -1;
else if (*s1) return 1;
else return 0;
}
char *strndup(const char *s, size_t n) {
size_t len = strlen(s);
if (n > len) {
n = len;
}
char *s2 = malloc(n + 1);
memcpy(s2, s, n);
s2[n] = '\0';
return s2;
}
char *strcpy(char *dest, const char *src) {
char *d = dest;
while (*src) {
*d++ = *src++;
}
*d = '\0';
return dest;
}
// needed because gcc optimises strcpy + strcat to this
char *stpcpy(char *dest, const char *src) {
while (*src) {
*dest++ = *src++;
}
*dest = '\0';
return dest;
}
char *strcat(char *dest, const char *src) {
char *d = dest;
while (*d) {
d++;
}
while (*src) {
*d++ = *src++;
}
*d = '\0';
return dest;
}

30
teensy/usart.c Normal file
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#include "misc.h"
#include "../stm/usart.h"
void usart_init(void) {
}
bool usart_is_enabled(void) {
return false;
}
bool usart_rx_any(void) {
return false;
}
int usart_rx_char(void) {
return 0;
}
void usart_tx_char(int c) {
(void)c;
}
void usart_tx_str(const char *str) {
(void)str;
}
void usart_tx_strn_cooked(const char *str, int len) {
(void)str;
(void)len;
}