ESP8266 Community Forum

- Sat Jan 24, 2015 2:21 pm #8097

Use the limitation of current and voltage to the input of ADC.
0...1V, + resistor. With more than 1V "code crashes"

I am not using the externally available ADC. Also I don't see why providing too much voltage to the ADC would cause the chip to hang.

readv dd33 () programmatically associated with Wifi tx...

What are you trying to imply here?

Btw.: Did you do some experiments to see if

Code: Select allos_update_cpu_frequency(160)

actually does anything?
I wrote a small benchmark in lua but could not see any speed gains compared to 80MHz.

Code: Select allets_get_cpu_frequency()

correctly reports back 160MHz.
Does it have to be called at startup?

- Sat Jan 24, 2015 3:37 pm #8104

But you have to uncomment this part:
//#define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
in Web/include/esp8266.h

You have an old version...

Hi!
in esp_iot_sdk_v0.9.4_14_12_19.zip and esp_iot_sdk_v0.9.4_14_12_19.zip exist c_types.h contain this line:
#define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
and redefine in your c:\Espressif\Web_base\Web\include\esp8266.h source
Thank You

- Sat Jan 24, 2015 4:24 pm #8107

I am not using the externally available ADC. Also I don't see why providing too much voltage to the ADC would cause the chip to hang.

Try to do the experiment.

Btw.: Did you do some experiments to see if

Code: Select allos_update_cpu_frequency(160)

actually does anything?
I wrote a small benchmark in lua but could not see any speed gains compared to 80MHz.

Code: Select allets_get_cpu_frequency()

correctly reports back 160MHz.
Does it have to be called at startup?

https://github.com/esp8266/esp8266-wiki/wiki/Memory-Map :
3FF00014h is a clock setting register. Setting bit 0 changes the CPU to 160 MHz mode. Clearing it means 80 MHz.

Code: Select all#ifdef USE_CPU_SPEED
#if   USE_CPU_SPEED > 80
   REG_SET_BIT(0x3ff00014, BIT(0));
   os_update_cpu_frequency(160);
#else
   REG_CLR_BIT(0x3ff00014, BIT(0));
   os_update_cpu_frequency(80);
#endif
#if DEBUGSOO > 0
   os_printf("Set CPU CLK: %u MHz\n", ets_get_cpu_frequency());
#endif
#endif


see os_update_cpu_frequency in esp_iot_sdk\examples\IoT_Demo\ssl\app\espconn_ssl.c

BiosROM:

Code: Select all40002f04 <ets_update_cpu_frequency>:
    2f04:   fff131         l32r   a3, 2ec8 <ets_timer_init+0x60>  0x3fffc704 = 0x000000a0
    2f07:   0329         s32i.n   a2, a3, 0
    2f09:   f00d         ret.n
    2f0b:   00             .byte 00

40002f0c <ets_get_cpu_frequency>:
    2f0c:   ffef21         l32r   a2, 2ec8 <ets_timer_init+0x60>
    2f0f:   0228         l32i.n   a2, a2, 0
    2f11:   f00d         ret.n


os_update_cpu_frequency()/ets_get_cpu_frequency() - Called to notify the timers and other routines settings in the SDK/BiosROM.
SDK periodically disables 160MHz.
My tcpsrv_server_poll() enables 160MHz, when there is a connections (else #define USE_CPU_SPEED xx)

At 80MHz speed HTTP / TCP to 800 Kbytes / sec
At 160MHz CPU and QSPI 80MHz + Flash W25Q128 speed more 1200 Kbytes / sec

- Sat Jan 24, 2015 9:12 pm #8126

But you have to uncomment this part:
//#define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
in Web/include/esp8266.h

You have an old version...

Hi!
in esp_iot_sdk_v0.9.4_14_12_19.zip and esp_iot_sdk_v0.9.4_14_12_19.zip exist c_types.h contain this line:
#define ICACHE_FLASH_ATTR __attribute__((section(".irom0.text")))
and redefine in your c:\Espressif\Web_base\Web\include\esp8266.h source
Thank You

Hi!
#define a b
#define a b
#define a b
#define a b
No error