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cpu/esp8266: cpu frequency settings

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This commit is contained in:
Schorcht 2018-10-19 13:08:32 +02:00
parent f38b71b720
commit 0d796d6eec
4 changed files with 34 additions and 6 deletions
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16
cpu/esp8266/include/user_config.h
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@ -5,6 +5,13 @@
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_esp8266
* @brief Default configurations required by the SDK
* @author Gunar Schorcht <gunar@schorcht.net>
* @file
* @{
*/
#ifndef USER_CONFIG_H
#define USER_CONFIG_H
@ -13,10 +20,17 @@
extern "C" {
#endif
/* This file is just to satisfy SDK */
/**
* @brief Default CPU frequency in MHz.
* Possible values are 80 and 160.
*/
#ifndef ESP8266_CPU_FREQUENCY
#define ESP8266_CPU_FREQUENCY 80
#endif
#ifdef __cplusplus
}
#endif
#endif /* USER_CONFIG_H */
/** @} */

13
cpu/esp8266/sdk/main.c
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@ -129,6 +129,19 @@ void system_restart(void)
__asm__ volatile (" call0 0x40000080 ");
}
extern bool system_update_cpu_freq(uint8 freq)
{
if (freq == 160) {
DPORT.CPU_CLOCK |= DPORT_CPU_CLOCK_X2;
ets_update_cpu_frequency(160);
}
else {
DPORT.CPU_CLOCK &= ~DPORT_CPU_CLOCK_X2;
ets_update_cpu_frequency(80);
}
return true;
}
/**
* Following code is completly or at least partially from
* https://github.com/pvvx/esp8266web

2
cpu/esp8266/sdk/main.h
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@ -42,13 +42,13 @@ extern "C" {
#define system_get_time phy_get_mactime
#define system_get_chip_id() (((DPORT.OTP_MAC1 & 0xffff) << 8) + ((DPORT.OTP_MAC0 >> 24) & 0xff))
#define system_get_cpu_freq ets_get_cpu_frequency
/* TODO #define system_update_cpu_freq ets_update_cpu_frequency */
extern int os_printf_plus (const char* format, ...);
extern void system_deep_sleep (uint32_t time_in_us);
extern uint8_t system_get_checksum(uint8_t *ptr, uint32_t len);
extern void system_restart (void);
extern bool system_update_cpu_freq(uint8 freq);
extern bool system_rtc_mem_read(uint32_t src_addr, void *des_addr, uint32_t save_size);
extern bool system_rtc_mem_write(uint32_t src_addr, void *des_addr, uint32_t save_size);

9
cpu/esp8266/startup.c
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@ -170,8 +170,8 @@ void IRAM user_init (void)
syscalls_init ();
thread_isr_stack_init ();
/* run system in high performance mode */
system_update_cpu_freq(160);
/* set system frequency */
system_update_cpu_freq(ESP8266_CPU_FREQUENCY);
/* reinit system timer as microsecond timer */
system_timer_reinit ();
@ -191,6 +191,7 @@ void IRAM user_init (void)
#include "esp/dport_regs.h"
#include "esp/phy_info.h"
#include "esp/spiflash.h"
#include "user_config.h"
/**
* @brief Defines the structure of the file header in SPI flash
@ -661,8 +662,8 @@ void __attribute__((noreturn)) IRAM cpu_user_start (void)
/** }@ */
/* run system in high performance mode */
/* TODO system_update_cpu_freq(160); */
/* set system frequency */
system_update_cpu_freq(ESP8266_CPU_FREQUENCY);
/* PHASE 3: start RIOT-OS kernel */