diff options
| -rw-r--r-- | stm/main.c | 77 |
1 files changed, 63 insertions, 14 deletions
diff --git a/stm/main.c b/stm/main.c index 92a1a4c807..ab6c12d567 100644 --- a/stm/main.c +++ b/stm/main.c @@ -3,6 +3,7 @@ #include <stm32f4xx_rcc.h> #include <stm32f4xx_gpio.h> #include <stm32f4xx_tim.h> +#include <stm32f4xx_pwr.h> #include <stm32f4xx_rtc.h> #include <stm_misc.h> #include "std.h" @@ -225,29 +226,77 @@ static py_obj_t pyb_info(void) { return py_const_none; } +char *strdup(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) { usb_vcp_send_str(prompt); int len = vstr_len(line); + int escape = 0; + int hist_num = 0; for (;;) { while (usb_vcp_rx_any() == 0) { - sys_tick_delay_ms(10); + sys_tick_delay_ms(1); } char c = usb_vcp_rx_get(); - if (c == 4 && vstr_len(line) == len) { - return 0; - } else if (c == '\r') { - usb_vcp_send_str("\r\n"); - return 1; - } else if (c == 127) { - if (vstr_len(line) > len) { - vstr_cut_tail(line, 1); - usb_vcp_send_str("\b \b"); + if (escape == 0) { + if (c == 4 && vstr_len(line) == len) { + return 0; + } else if (c == '\r') { + usb_vcp_send_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); + usb_vcp_send_str("\b \b"); + } + } else if (32 <= c && c <= 126) { + vstr_add_char(line, c); + usb_vcp_send_strn(&c, 1); } - } else if (32 <= c && c <= 126) { - vstr_add_char(line, c); - usb_vcp_send_strn(&c, 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--) { + usb_vcp_send_str("\b \b"); + } + // set line to history + line->len = len; + vstr_add_str(line, readline_hist[hist_num]); + // draw line + usb_vcp_send_str(readline_hist[hist_num]); + // increase hist num + hist_num += 1; + } + } + } else { + escape = 0; } - sys_tick_delay_ms(100); + sys_tick_delay_ms(10); } } |