feat(esp8266): Add "putc" and "vprintf" of version "ets_"

components/esp8266/include/esp8266/rom_functions.h

@@ -9,7 +9,7 @@ uint32_t Wait_SPI_Idle();
 void uart_div_modify(uint32_t uart_no, uint32_t baud_div);
 
 void ets_delay_us(uint32_t us);
-int ets_vprintf(void (*putc)(char), const char* fmt, va_list ap);
+int ets_io_vprintf(int (*putc)(int), const char* fmt, va_list ap);
 
 void system_soft_wdt_feed();
 

components/esp8266/include/esp_libc.h

@@ -28,14 +28,37 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <stdio.h>
+#include <stdarg.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+
 uint32_t os_random(void);
 int32_t os_get_random(unsigned char *buf, size_t len);
 
+/**
+  * @brief  put a character to uart or other devices, similar with putc.
+  *
+  * @param  c : a character.
+  *
+  * @return int : the character written as an unsigned char cast to an int or EOF on error.
+  */
+int ets_putc(int c);
+
+/**
+  * @brief  Printf the strings to uart or other devices, similar with vprintf, simple than vprintf.
+  *         Can not print float point data format, or longlong data format.
+  *
+  * @param  const char *fmt : See vprintf.
+  *
+  * @param  ap : parameter list, see vprintf.
+  *
+  * @return int : the length printed to the output device.
+  */
+int ets_vprintf(const char *fmt, va_list ap);
+
 /**
   * @brief  Printf the strings to uart or other devices, similar with printf, simple than printf.
   *         Can not print float point data format, or longlong data format.

components/esp8266/ld/eagle.rom.addr.v6.ld

@@ -57,4 +57,4 @@ PROVIDE ( gpio_input_get = 0x40004cf0 );
 PROVIDE ( gpio_pin_wakeup_disable = 0x40004ed4 );
 PROVIDE ( gpio_pin_wakeup_enable = 0x40004e90 );
 
-PROVIDE ( ets_vprintf = 0x40001f00 );
+PROVIDE ( ets_io_vprintf = 0x40001f00 );

components/esp8266/source/ets_printf.c

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 #include <stdint.h>
-#include <stdarg.h>
 
 #include "esp_attr.h"
 
@@ -21,16 +20,27 @@
 #include "esp8266/uart_register.h"
 #include "esp8266/rom_functions.h"
 
-static void IRAM_ATTR uart_tx_one_char(char c)
+#ifndef CONFIG_ETS_PUTC_UART
+#define CONFIG_ETS_PUTC_UART 0
+#endif
+
+int IRAM_ATTR ets_putc(int c)
 {
     while (1) {
-        uint32_t fifo_cnt = READ_PERI_REG(UART_STATUS(0)) & (UART_TXFIFO_CNT << UART_TXFIFO_CNT_S);
+        uint32_t fifo_cnt = READ_PERI_REG(UART_STATUS(CONFIG_ETS_PUTC_UART)) & (UART_TXFIFO_CNT << UART_TXFIFO_CNT_S);
 
         if ((fifo_cnt >> UART_TXFIFO_CNT_S & UART_TXFIFO_CNT) < 126)
             break;
     }
 
-    WRITE_PERI_REG(UART_FIFO(0) , c);
+    WRITE_PERI_REG(UART_FIFO(CONFIG_ETS_PUTC_UART) , c);
+
+    return c;
+}
+
+int IRAM_ATTR ets_vprintf(const char *fmt, va_list ap)
+{
+    return ets_io_vprintf(ets_putc, fmt, ap);
 }
 
 /* Re-write ets_printf in SDK side, since ets_printf in ROM will use a global
@@ -42,7 +52,7 @@ int IRAM_ATTR ets_printf(const char* fmt, ...)
     int ret;
 
     va_start(ap, fmt);
-    ret = ets_vprintf(uart_tx_one_char, fmt, ap);
+    ret = ets_vprintf(fmt, ap);
     va_end(ap);
 
     return ret;

components/freertos/port/esp8266/panic.c

@@ -12,83 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <string.h>
+#include "esp_attr.h"
+#include "esp_libc.h"
 
-#include "esp8266/ets_sys.h"
 #include "esp8266/eagle_soc.h"
-#include "esp8266/uart_register.h"
-#include "freertos/portmacro.h"
-
-/*
- * Todo: panic output UART ID, we may add it to 'kconfig' to select target UART.
- */
-#define PANIC_UART 0
-
-/*
- * @brief output a character
- * 
- * @param c a character
- * 
- * @return none
- */
-static IRAM_ATTR void panit_putc(char c)
-{
-    while (1) {
-        uint32_t fifo_cnt = READ_PERI_REG(UART_STATUS(PANIC_UART)) & (UART_TXFIFO_CNT << UART_TXFIFO_CNT_S);
-
-        if ((fifo_cnt >> UART_TXFIFO_CNT_S & UART_TXFIFO_CNT) < 126)
-            break;
-    }
-
-    WRITE_PERI_REG(UART_FIFO(PANIC_UART) , c);
-}
-
-/*
- * @brief output a left-aligned string
- * 
- * @param s string pointer
- * @param left_aligned left-aligned bytes
- * 
- * @return none
- */
-static IRAM_ATTR void panic_puts(const char *s, int left_aligned)
-{
-    int bytes = left_aligned - strlen(s);
-
-    while (bytes-- > 0)
-        panit_putc(' ');
-
-    while (*s)
-        panit_putc(*s++);
-}
-
-/*
- * @brief output a hex value string of 32-bites data
- * 
- * @param hex 32-bites data
- * 
- * @return none
- */
-static IRAM_ATTR void panic_puthex(int hex)
-{
-    char buf[8];
-    int bytes = 0;
-
-    while (bytes < 8) {
-        char c = (uint32_t)hex % 16;
-
-        if (c < 10)
-            c = c + '0';
-        else
-            c = c - 10 + 'a';
-
-        buf[bytes++] = c;
-        hex >>= 4;
-    }
-
-    while (bytes)
-        panit_putc(buf[--bytes]);
-}
+#include "esp8266/ets_sys.h"
 
 /*
  * @brief output xtensa register value map when crash
@@ -114,12 +42,9 @@ void IRAM_ATTR panicHandler(void *frame)
 
     for (x = 0; x < 20; x += 4) {
         for (y = 0; y < 4; y++) {
-            panic_puts(sdesc[x + y], 8);
-            panic_puts(": 0x", 0);
-            panic_puthex(regs[x + y + 1]);
-            panic_puts("  ", 0);
+            ets_printf("%8s: 0x%08x  ", sdesc[x + y], regs[x + y + 1]);
         }
-        panit_putc('\n');
+        ets_printf("\n");
     }
 
     /*