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94 lines
2.2 KiB
94 lines
2.2 KiB
#include <esp8266.h>
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#include "uart.h"
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#include "cgi.h"
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#include "log.h"
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// Web log for the esp8266 to replace outputting to uart1.
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// The web log has a 1KB circular in-memory buffer which os_printf prints into and
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// the HTTP handler simply displays the buffer content on a web page.
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// see consolse.c for invariants (same here)
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#define BUF_MAX (1024)
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static char log_buf[BUF_MAX];
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static int log_wr, log_rd;
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static bool log_no_uart; // start out printing to uart
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static bool log_newline; // at start of a new line
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void ICACHE_FLASH_ATTR
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log_uart(bool enable) {
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if (!enable && !log_no_uart) {
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os_printf("Turning OFF uart log\n");
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os_delay_us(4*1000L); // time for uart to flush
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log_no_uart = !enable;
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} else if (enable && log_no_uart) {
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log_no_uart = !enable;
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os_printf("Turning ON uart log\n");
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}
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}
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static void ICACHE_FLASH_ATTR
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log_write(char c) {
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log_buf[log_wr] = c;
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log_wr = (log_wr+1) % BUF_MAX;
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if (log_wr == log_rd)
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log_rd = (log_rd+1) % BUF_MAX; // full, eat first char
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}
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#if 0
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static char ICACHE_FLASH_ATTR
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log_read(void) {
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char c = 0;
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if (log_rd != log_wr) {
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c = log_buf[log_rd];
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log_rd = (log_rd+1) % BUF_MAX;
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}
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return c;
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}
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#endif
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static void ICACHE_FLASH_ATTR
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log_write_char(char c) {
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// Uart output unless disabled
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if (!log_no_uart) {
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if (log_newline) {
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uart0_write_char('>');
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uart0_write_char(' ');
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log_newline = false;
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}
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uart0_write_char(c);
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log_newline = c == '\n';
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}
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// Store in log buffer
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if (c == '\n') log_write('\r');
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log_write(c);
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}
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//===== Display a web page with the log
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int ICACHE_FLASH_ATTR
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tplLog(HttpdConnData *connData, char *token, void **arg) {
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if (token==NULL) return HTTPD_CGI_DONE;
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if (os_strcmp(token, "log") == 0) {
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if (log_wr > log_rd) {
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httpdSend(connData, log_buf+log_rd, log_wr-log_rd);
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} else if (log_rd != log_wr) {
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httpdSend(connData, log_buf+log_rd, BUF_MAX-log_rd);
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httpdSend(connData, log_buf, log_wr);
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} else {
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httpdSend(connData, "<buffer empty>", -1);
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}
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} else if (os_strcmp(token, "head")==0) {
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printHead(connData);
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} else {
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httpdSend(connData, "Unknown\n", -1);
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}
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return HTTPD_CGI_DONE;
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}
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void ICACHE_FLASH_ATTR logInit() {
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log_wr = 0;
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log_rd = 0;
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os_install_putc1((void *)log_write_char);
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}
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