REPl working on UART6 with STMHAL
diff --git a/stmhal/pyexec.c b/stmhal/pyexec.c
new file mode 100644
index 0000000..2eca892
--- /dev/null
+++ b/stmhal/pyexec.c
@@ -0,0 +1,347 @@
+#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"
+#if 0
+#include "storage.h"
+#include "usb.h"
+#endif
+#include "usart.h"
+
+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
+#if 0
+ usb_vcp_send_str(str);
+#endif
+}
+
+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 0
+ if (usb_vcp_rx_any() != 0) {
+ return usb_vcp_rx_get();
+ } else
+#endif
+ if (pyb_usart_global_debug != PYB_USART_NONE && usart_rx_any(pyb_usart_global_debug)) {
+ return usart_rx_char(pyb_usart_global_debug);
+ }
+ sys_tick_delay_ms(1);
+#if 0
+ if (storage_needs_flush()) {
+ storage_flush();
+ }
+#endif
+ }
+}
+
+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};
+
+#if 0
+#else
+#define VCP_CHAR_CTRL_A (1)
+#define VCP_CHAR_CTRL_C (3)
+#define VCP_CHAR_CTRL_D (4)
+#endif
+
+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 (;;) {
+ int c = stdin_rx_chr();
+ if (escape == 0) {
+ if (VCP_CHAR_CTRL_A <= c && c <= VCP_CHAR_CTRL_D && vstr_len(line) == len) {
+ return c;
+ } 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] = str_dup(vstr_str(line));
+ return 0;
+ } 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;
+ }
+ sys_tick_delay_ms(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) {
+ 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) {
+#if 0
+ usb_vcp_set_interrupt_char(VCP_CHAR_CTRL_C); // allow ctrl-C to interrupt us
+#endif
+ rt_call_function_0(module_fun);
+#if 0
+ usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
+#endif
+ nlr_pop();
+ ret = true;
+ } else {
+ // uncaught exception
+ // FIXME it could be that an interrupt happens just before we disable it here
+#if 0
+ usb_vcp_set_interrupt_char(VCP_CHAR_NONE); // disable interrupt
+#endif
+ 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;
+}
+
+void pyexec_raw_repl(void) {
+ vstr_t line;
+ vstr_init(&line, 32);
+
+raw_repl_reset:
+ stdout_tx_str("raw REPL; CTRL-C to exit\r\n");
+
+ for (;;) {
+ vstr_reset(&line);
+ stdout_tx_str(">");
+ for (;;) {
+ char c = stdin_rx_chr();
+ if (c == VCP_CHAR_CTRL_A) {
+ goto raw_repl_reset;
+ } else if (c == VCP_CHAR_CTRL_C) {
+ vstr_reset(&line);
+ break;
+ } else if (c == VCP_CHAR_CTRL_D) {
+ break;
+ } else if (c == '\r') {
+ vstr_add_char(&line, '\n');
+ } else if (32 <= c && c <= 126) {
+ vstr_add_char(&line, c);
+ }
+ }
+
+ stdout_tx_str("OK");
+
+ if (vstr_len(&line) == 0) {
+ // finished
+ 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_FILE_INPUT, false);
+
+ stdout_tx_str("\004");
+ }
+
+ vstr_clear(&line);
+ stdout_tx_str("\r\n");
+}
+
+void pyexec_repl(void) {
+#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
+
+ 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");
+ }
+ }
+ }
+ */
+
+ vstr_t line;
+ vstr_init(&line, 32);
+
+ for (;;) {
+ vstr_reset(&line);
+ int ret = readline(&line, ">>> ");
+
+ if (ret == VCP_CHAR_CTRL_A) {
+ pyexec_raw_repl();
+ continue;
+ } else if (ret == VCP_CHAR_CTRL_C) {
+ stdout_tx_str("\r\n");
+ continue;
+ } else if (ret == VCP_CHAR_CTRL_D) {
+ // EOF
+ break;
+ } 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);
+ }
+
+ stdout_tx_str("\r\n");
+}
+
+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);