Use clock_prescale_set()
from avr-libc (#7540)
* Use `clock_prescale_set()` from avr-libc * Remove outdated FAQ info
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698d0dbda8
4 changed files with 2 additions and 50 deletions
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@ -111,21 +111,6 @@ https://github.com/tmk/tmk_keyboard/issues/212
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https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
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https://developer.mbed.org/forum/mbed/topic/5205/
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## `clock_prescale_set` and `clock_div_1` Not Available
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Your toolchain is too old to support the MCU. For example WinAVR 20100110 doesn't support ATMega32u2.
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```
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Compiling C: ../../tmk_core/protocol/lufa/lufa.c
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avr-gcc -c -mmcu=atmega32u2 -gdwarf-2 -DF_CPU=16000000UL -DINTERRUPT_CONTROL_ENDPOINT -DBOOTLOADER_SIZE=4096 -DF_USB=16000000UL -DARCH=ARCH_AVR8 -DUSB_DEVICE_ONLY -DUSE_FLASH_DESCRIPTORS -DUSE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)" -DFIXED_CONTROL_ENDPOINT_SIZE=8 -DFIXED_NUM_CONFIGURATIONS=1 -DPROTOCOL_LUFA -DEXTRAKEY_ENABLE -DCONSOLE_ENABLE -DCOMMAND_ENABLE -DVERSION=unknown -Os -funsigned-char -funsigned-bitfields -ffunction-sections -fdata-sections -fno-inline-small-functions -fpack-struct -fshort-enums -fno-strict-aliasing -Wall -Wstrict-prototypes -Wa,-adhlns=obj_alps64/protocol/lufa/lufa.lst -I. -I../../tmk_core -I../../tmk_core/protocol/lufa -I../../tmk_core/protocol/lufa/LUFA-git -I../../tmk_core/common -std=gnu99 -include config.h -MMD -MP -MF .dep/obj_alps64_protocol_lufa_lufa.o.d ../../tmk_core/protocol/lufa/lufa.c -o obj_alps64/protocol/lufa/lufa.o
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../../tmk_core/protocol/lufa/lufa.c: In function 'setup_mcu':
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../../tmk_core/protocol/lufa/lufa.c:575: warning: implicit declaration of function 'clock_prescale_set'
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../../tmk_core/protocol/lufa/lufa.c:575: error: 'clock_div_1' undeclared (first use in this function)
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../../tmk_core/protocol/lufa/lufa.c:575: error: (Each undeclared identifier is reported only once
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../../tmk_core/protocol/lufa/lufa.c:575: error: for each function it appears in.)
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make: *** [obj_alps64/protocol/lufa/lufa.o] Error 1
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```
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## BOOTLOADER_SIZE for AVR
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Note that Teensy2.0++ bootloader size is 2048byte. Some Makefiles may have wrong comment.
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@ -112,21 +112,6 @@ https://github.com/tmk/tmk_keyboard/issues/212
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https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
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https://developer.mbed.org/forum/mbed/topic/5205/
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## `clock_prescale_set` and `clock_div_1` Not Available
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Votre chaîne d'outils (Toolchain) est trop vieille pour supporter le MCU. Par exemple, WinAVR 20100110 ne supporte pas ATMega32u2.
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```
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Compiling C: ../../tmk_core/protocol/lufa/lufa.c
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avr-gcc -c -mmcu=atmega32u2 -gdwarf-2 -DF_CPU=16000000UL -DINTERRUPT_CONTROL_ENDPOINT -DBOOTLOADER_SIZE=4096 -DF_USB=16000000UL -DARCH=ARCH_AVR8 -DUSB_DEVICE_ONLY -DUSE_FLASH_DESCRIPTORS -DUSE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)" -DFIXED_CONTROL_ENDPOINT_SIZE=8 -DFIXED_NUM_CONFIGURATIONS=1 -DPROTOCOL_LUFA -DEXTRAKEY_ENABLE -DCONSOLE_ENABLE -DCOMMAND_ENABLE -DVERSION=unknown -Os -funsigned-char -funsigned-bitfields -ffunction-sections -fdata-sections -fno-inline-small-functions -fpack-struct -fshort-enums -fno-strict-aliasing -Wall -Wstrict-prototypes -Wa,-adhlns=obj_alps64/protocol/lufa/lufa.lst -I. -I../../tmk_core -I../../tmk_core/protocol/lufa -I../../tmk_core/protocol/lufa/LUFA-git -I../../tmk_core/common -std=gnu99 -include config.h -MMD -MP -MF .dep/obj_alps64_protocol_lufa_lufa.o.d ../../tmk_core/protocol/lufa/lufa.c -o obj_alps64/protocol/lufa/lufa.o
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../../tmk_core/protocol/lufa/lufa.c: In function 'setup_mcu':
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../../tmk_core/protocol/lufa/lufa.c:575: warning: implicit declaration of function 'clock_prescale_set'
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../../tmk_core/protocol/lufa/lufa.c:575: error: 'clock_div_1' undeclared (first use in this function)
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../../tmk_core/protocol/lufa/lufa.c:575: error: (Each undeclared identifier is reported only once
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../../tmk_core/protocol/lufa/lufa.c:575: error: for each function it appears in.)
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make: *** [obj_alps64/protocol/lufa/lufa.o] Error 1
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```
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## BOOTLOADER_SIZE pour AVR
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Notez que la taille du bootloader pour les Teensy2.0++ est de 2048bytes. Quelques Makefiles peuvent contenir une erreur et avoir le mauvais commentaire.
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@ -81,21 +81,6 @@ https://github.com/tmk/tmk_keyboard/issues/212
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https://github.com/tmk/tmk_keyboard/wiki/mbed-cortex-porting#compile-error-cstddef
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https://developer.mbed.org/forum/mbed/topic/5205/
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## `clock_prescale_set` and `clock_div_1` Not Available
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你的工具链太旧了不支持MCU。比如WinAVR 20100110就不支持ATMega32u2.
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```
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Compiling C: ../../tmk_core/protocol/lufa/lufa.c
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avr-gcc -c -mmcu=atmega32u2 -gdwarf-2 -DF_CPU=16000000UL -DINTERRUPT_CONTROL_ENDPOINT -DBOOTLOADER_SIZE=4096 -DF_USB=16000000UL -DARCH=ARCH_AVR8 -DUSB_DEVICE_ONLY -DUSE_FLASH_DESCRIPTORS -DUSE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)" -DFIXED_CONTROL_ENDPOINT_SIZE=8 -DFIXED_NUM_CONFIGURATIONS=1 -DPROTOCOL_LUFA -DEXTRAKEY_ENABLE -DCONSOLE_ENABLE -DCOMMAND_ENABLE -DVERSION=unknown -Os -funsigned-char -funsigned-bitfields -ffunction-sections -fdata-sections -fno-inline-small-functions -fpack-struct -fshort-enums -fno-strict-aliasing -Wall -Wstrict-prototypes -Wa,-adhlns=obj_alps64/protocol/lufa/lufa.lst -I. -I../../tmk_core -I../../tmk_core/protocol/lufa -I../../tmk_core/protocol/lufa/LUFA-git -I../../tmk_core/common -std=gnu99 -include config.h -MMD -MP -MF .dep/obj_alps64_protocol_lufa_lufa.o.d ../../tmk_core/protocol/lufa/lufa.c -o obj_alps64/protocol/lufa/lufa.o
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../../tmk_core/protocol/lufa/lufa.c: In function 'setup_mcu':
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../../tmk_core/protocol/lufa/lufa.c:575: warning: implicit declaration of function 'clock_prescale_set'
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../../tmk_core/protocol/lufa/lufa.c:575: error: 'clock_div_1' undeclared (first use in this function)
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../../tmk_core/protocol/lufa/lufa.c:575: error: (Each undeclared identifier is reported only once
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../../tmk_core/protocol/lufa/lufa.c:575: error: for each function it appears in.)
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make: *** [obj_alps64/protocol/lufa/lufa.o] Error 1
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```
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## AVR的BOOTLOADER_SIZE
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注意Teensy2.0++ bootloader的大小是2048字节。有些Makefile注释错了。
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@ -914,14 +914,11 @@ void virtser_send(const uint8_t byte) {
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*/
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static void setup_mcu(void) {
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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MCUSR &= ~_BV(WDRF);
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wdt_disable();
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/* Disable clock division */
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// clock_prescale_set(clock_div_1);
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CLKPR = (1 << CLKPCE);
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CLKPR = (0 << CLKPS3) | (0 << CLKPS2) | (0 << CLKPS1) | (0 << CLKPS0);
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clock_prescale_set(clock_div_1);
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}
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/** \brief Setup USB
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